bcf26f5209
The ring builder's placement algorithm has two goals: first, to ensure that each partition has its replicas as far apart as possible, and second, to ensure that partitions are fairly distributed according to device weight. In many cases, it succeeds in both, but sometimes those goals conflict. When that happens, operators may want to relax the rules a little bit in order to reach a compromise solution. Imagine a cluster of 3 nodes (A, B, C), each with 20 identical disks, and using 3 replicas. The ring builder will place 1 replica of each partition on each node, as you'd expect. Now imagine that one disk fails in node C and is removed from the ring. The operator would probably be okay with remaining at 1 replica per node (unless their disks are really close to full), but to accomplish that, they have to multiply the weights of the other disks in node C by 20/19 to make C's total weight stay the same. Otherwise, the ring builder will move partitions around such that some partitions have replicas only on nodes A and B. If 14 more disks failed in node C, the operator would probably be okay with some data not living on C, as a 4x increase in storage requirements is likely to fill disks. This commit introduces the notion of "overload": how much extra partition space can be placed on each disk *over* what the weight dictates. For example, an overload of 0.1 means that a device can take up to 10% more partitions than its weight would imply in order to make the replica dispersion better. Overload only has an effect when replica-dispersion and device weights come into conflict. The overload is a single floating-point value for the builder file. Existing builders get an overload of 0.0, so there will be no behavior change on existing rings. In the example above, imagine the operator sets an overload of 0.112 on his rings. If node C loses a drive, each other drive can take on up to 11.2% more data. Splitting the dead drive's partitions among the remaining 19 results in a 5.26% increase, so everything that was on node C stays on node C. If another disk dies, then we're up to an 11.1% increase, and so everything still stays on node C. If a third disk dies, then we've reached the limits of the overload, so some partitions will begin to reside solely on nodes A and B. DocImpact Change-Id: I3593a1defcd63b6ed8eae9c1c66b9d3428b33864
1473 lines
64 KiB
Python
1473 lines
64 KiB
Python
# Copyright (c) 2010-2012 OpenStack Foundation
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import errno
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import mock
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import operator
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import os
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import unittest
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import cPickle as pickle
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from array import array
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from collections import defaultdict
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from math import ceil
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from tempfile import mkdtemp
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from shutil import rmtree
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from swift.common import exceptions
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from swift.common import ring
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from swift.common.ring.builder import MAX_BALANCE
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class TestRingBuilder(unittest.TestCase):
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def setUp(self):
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self.testdir = mkdtemp()
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def tearDown(self):
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rmtree(self.testdir, ignore_errors=1)
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def _partition_counts(self, builder):
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"""
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Returns a dictionary mapping (device ID) to (number of partitions
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assigned to that device).
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"""
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counts = {}
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for part2dev_id in builder._replica2part2dev:
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for dev_id in part2dev_id:
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counts[dev_id] = counts.get(dev_id, 0) + 1
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return counts
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def _get_population_by_region(self, builder):
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"""
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Returns a dictionary mapping region to number of partitions in that
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region.
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"""
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population_by_region = defaultdict(int)
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r = builder.get_ring()
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for part2dev_id in r._replica2part2dev_id:
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for dev_id in part2dev_id:
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dev = r.devs[dev_id]
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population_by_region[dev['region']] += 1
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return dict(population_by_region.items())
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def test_init(self):
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rb = ring.RingBuilder(8, 3, 1)
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self.assertEquals(rb.part_power, 8)
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self.assertEquals(rb.replicas, 3)
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self.assertEquals(rb.min_part_hours, 1)
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self.assertEquals(rb.parts, 2 ** 8)
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self.assertEquals(rb.devs, [])
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self.assertEquals(rb.devs_changed, False)
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self.assertEquals(rb.version, 0)
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def test_overlarge_part_powers(self):
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ring.RingBuilder(32, 3, 1) # passes by not crashing
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self.assertRaises(ValueError, ring.RingBuilder, 33, 3, 1)
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def test_insufficient_replicas(self):
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ring.RingBuilder(8, 1.0, 1) # passes by not crashing
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self.assertRaises(ValueError, ring.RingBuilder, 8, 0.999, 1)
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def test_negative_min_part_hours(self):
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ring.RingBuilder(8, 3, 0) # passes by not crashing
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self.assertRaises(ValueError, ring.RingBuilder, 8, 3, -1)
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def test_get_ring(self):
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rb = ring.RingBuilder(8, 3, 1)
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rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10000, 'device': 'sda1'})
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rb.add_dev({'id': 1, 'region': 0, 'zone': 1, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10001, 'device': 'sda1'})
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rb.add_dev({'id': 2, 'region': 0, 'zone': 2, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10002, 'device': 'sda1'})
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rb.add_dev({'id': 3, 'region': 0, 'zone': 1, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10004, 'device': 'sda1'})
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rb.remove_dev(1)
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rb.rebalance()
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r = rb.get_ring()
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self.assert_(isinstance(r, ring.RingData))
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r2 = rb.get_ring()
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self.assert_(r is r2)
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rb.rebalance()
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r3 = rb.get_ring()
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self.assert_(r3 is not r2)
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r4 = rb.get_ring()
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self.assert_(r3 is r4)
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def test_rebalance_with_seed(self):
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devs = [(0, 10000), (1, 10001), (2, 10002), (1, 10003)]
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ring_builders = []
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for n in range(3):
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rb = ring.RingBuilder(8, 3, 1)
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for idx, (zone, port) in enumerate(devs):
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rb.add_dev({'id': idx, 'region': 0, 'zone': zone, 'weight': 1,
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'ip': '127.0.0.1', 'port': port, 'device': 'sda1'})
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ring_builders.append(rb)
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rb0 = ring_builders[0]
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rb1 = ring_builders[1]
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rb2 = ring_builders[2]
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r0 = rb0.get_ring()
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self.assertTrue(rb0.get_ring() is r0)
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rb0.rebalance() # NO SEED
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rb1.rebalance(seed=10)
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rb2.rebalance(seed=10)
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r1 = rb1.get_ring()
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r2 = rb2.get_ring()
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self.assertFalse(rb0.get_ring() is r0)
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self.assertNotEquals(r0.to_dict(), r1.to_dict())
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self.assertEquals(r1.to_dict(), r2.to_dict())
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def test_rebalance_part_on_deleted_other_part_on_drained(self):
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rb = ring.RingBuilder(8, 3, 1)
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rb.add_dev({'id': 0, 'region': 1, 'zone': 1, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10000, 'device': 'sda1'})
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rb.add_dev({'id': 1, 'region': 1, 'zone': 1, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10001, 'device': 'sda1'})
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rb.add_dev({'id': 2, 'region': 1, 'zone': 1, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10002, 'device': 'sda1'})
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rb.add_dev({'id': 3, 'region': 1, 'zone': 1, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10003, 'device': 'sda1'})
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rb.add_dev({'id': 4, 'region': 1, 'zone': 1, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10004, 'device': 'sda1'})
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rb.add_dev({'id': 5, 'region': 1, 'zone': 1, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10005, 'device': 'sda1'})
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rb.rebalance(seed=1)
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# We want a partition where 1 replica is on a removed device, 1
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# replica is on a 0-weight device, and 1 on a normal device. To
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# guarantee we have one, we see where partition 123 is, then
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# manipulate its devices accordingly.
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zero_weight_dev_id = rb._replica2part2dev[1][123]
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delete_dev_id = rb._replica2part2dev[2][123]
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rb.set_dev_weight(zero_weight_dev_id, 0.0)
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rb.remove_dev(delete_dev_id)
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rb.rebalance()
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def test_set_replicas(self):
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rb = ring.RingBuilder(8, 3.2, 1)
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rb.devs_changed = False
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rb.set_replicas(3.25)
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self.assertTrue(rb.devs_changed)
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rb.devs_changed = False
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rb.set_replicas(3.2500001)
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self.assertFalse(rb.devs_changed)
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def test_add_dev(self):
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rb = ring.RingBuilder(8, 3, 1)
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dev = {'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10000}
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dev_id = rb.add_dev(dev)
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self.assertRaises(exceptions.DuplicateDeviceError, rb.add_dev, dev)
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self.assertEqual(dev_id, 0)
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rb = ring.RingBuilder(8, 3, 1)
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# test add new dev with no id
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dev_id = rb.add_dev({'zone': 0, 'region': 1, 'weight': 1,
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'ip': '127.0.0.1', 'port': 6000})
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self.assertEquals(rb.devs[0]['id'], 0)
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self.assertEqual(dev_id, 0)
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#test add another dev with no id
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dev_id = rb.add_dev({'zone': 3, 'region': 2, 'weight': 1,
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'ip': '127.0.0.1', 'port': 6000})
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self.assertEquals(rb.devs[1]['id'], 1)
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self.assertEqual(dev_id, 1)
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def test_set_dev_weight(self):
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rb = ring.RingBuilder(8, 3, 1)
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rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 0.5,
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'ip': '127.0.0.1', 'port': 10000, 'device': 'sda1'})
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rb.add_dev({'id': 1, 'region': 0, 'zone': 0, 'weight': 0.5,
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'ip': '127.0.0.1', 'port': 10001, 'device': 'sda1'})
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rb.add_dev({'id': 2, 'region': 0, 'zone': 1, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10002, 'device': 'sda1'})
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rb.add_dev({'id': 3, 'region': 0, 'zone': 2, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10003, 'device': 'sda1'})
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rb.rebalance()
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r = rb.get_ring()
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counts = {}
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for part2dev_id in r._replica2part2dev_id:
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for dev_id in part2dev_id:
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counts[dev_id] = counts.get(dev_id, 0) + 1
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self.assertEquals(counts, {0: 128, 1: 128, 2: 256, 3: 256})
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rb.set_dev_weight(0, 0.75)
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rb.set_dev_weight(1, 0.25)
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rb.pretend_min_part_hours_passed()
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rb.rebalance()
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r = rb.get_ring()
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counts = {}
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for part2dev_id in r._replica2part2dev_id:
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for dev_id in part2dev_id:
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counts[dev_id] = counts.get(dev_id, 0) + 1
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self.assertEquals(counts, {0: 192, 1: 64, 2: 256, 3: 256})
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def test_remove_dev(self):
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rb = ring.RingBuilder(8, 3, 1)
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rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10000, 'device': 'sda1'})
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rb.add_dev({'id': 1, 'region': 0, 'zone': 1, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10001, 'device': 'sda1'})
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rb.add_dev({'id': 2, 'region': 0, 'zone': 2, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10002, 'device': 'sda1'})
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rb.add_dev({'id': 3, 'region': 0, 'zone': 3, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10003, 'device': 'sda1'})
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rb.rebalance()
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r = rb.get_ring()
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counts = {}
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for part2dev_id in r._replica2part2dev_id:
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for dev_id in part2dev_id:
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counts[dev_id] = counts.get(dev_id, 0) + 1
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self.assertEquals(counts, {0: 192, 1: 192, 2: 192, 3: 192})
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rb.remove_dev(1)
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rb.pretend_min_part_hours_passed()
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rb.rebalance()
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r = rb.get_ring()
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counts = {}
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for part2dev_id in r._replica2part2dev_id:
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for dev_id in part2dev_id:
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counts[dev_id] = counts.get(dev_id, 0) + 1
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self.assertEquals(counts, {0: 256, 2: 256, 3: 256})
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def test_remove_a_lot(self):
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rb = ring.RingBuilder(3, 3, 1)
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rb.add_dev({'id': 0, 'device': 'd0', 'ip': '10.0.0.1',
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'port': 6002, 'weight': 1000.0, 'region': 0, 'zone': 1})
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rb.add_dev({'id': 1, 'device': 'd1', 'ip': '10.0.0.2',
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'port': 6002, 'weight': 1000.0, 'region': 0, 'zone': 2})
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rb.add_dev({'id': 2, 'device': 'd2', 'ip': '10.0.0.3',
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'port': 6002, 'weight': 1000.0, 'region': 0, 'zone': 3})
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rb.add_dev({'id': 3, 'device': 'd3', 'ip': '10.0.0.1',
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'port': 6002, 'weight': 1000.0, 'region': 0, 'zone': 1})
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rb.add_dev({'id': 4, 'device': 'd4', 'ip': '10.0.0.2',
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'port': 6002, 'weight': 1000.0, 'region': 0, 'zone': 2})
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rb.add_dev({'id': 5, 'device': 'd5', 'ip': '10.0.0.3',
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'port': 6002, 'weight': 1000.0, 'region': 0, 'zone': 3})
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rb.rebalance()
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rb.validate()
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# this has to put more than 1/3 of the partitions in the
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# cluster on removed devices in order to ensure that at least
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# one partition has multiple replicas that need to move.
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#
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# (for an N-replica ring, it's more than 1/N of the
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# partitions, of course)
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rb.remove_dev(3)
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rb.remove_dev(4)
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rb.remove_dev(5)
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rb.rebalance()
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rb.validate()
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def test_shuffled_gather(self):
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if self._shuffled_gather_helper() and \
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self._shuffled_gather_helper():
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raise AssertionError('It is highly likely the ring is no '
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'longer shuffling the set of partitions '
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'to reassign on a rebalance.')
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def _shuffled_gather_helper(self):
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rb = ring.RingBuilder(8, 3, 1)
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rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10000, 'device': 'sda1'})
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rb.add_dev({'id': 1, 'region': 0, 'zone': 1, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10001, 'device': 'sda1'})
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rb.add_dev({'id': 2, 'region': 0, 'zone': 2, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10002, 'device': 'sda1'})
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rb.rebalance()
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rb.add_dev({'id': 3, 'region': 0, 'zone': 3, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10003, 'device': 'sda1'})
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rb.pretend_min_part_hours_passed()
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parts = rb._gather_reassign_parts()
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max_run = 0
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run = 0
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last_part = 0
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for part, _ in parts:
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if part > last_part:
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run += 1
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else:
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if run > max_run:
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max_run = run
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run = 0
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last_part = part
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if run > max_run:
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max_run = run
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return max_run > len(parts) / 2
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def test_initial_balance(self):
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# 2 boxes, 2 drives each in zone 1
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# 1 box, 2 drives in zone 2
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#
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# This is balanceable, but there used to be some nondeterminism in
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# rebalance() that would sometimes give you an imbalanced ring.
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rb = ring.RingBuilder(8, 3, 1)
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rb.add_dev({'region': 1, 'zone': 1, 'weight': 4000.0,
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'ip': '10.1.1.1', 'port': 10000, 'device': 'sda'})
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rb.add_dev({'region': 1, 'zone': 1, 'weight': 4000.0,
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'ip': '10.1.1.1', 'port': 10000, 'device': 'sdb'})
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rb.add_dev({'region': 1, 'zone': 1, 'weight': 4000.0,
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'ip': '10.1.1.2', 'port': 10000, 'device': 'sda'})
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rb.add_dev({'region': 1, 'zone': 1, 'weight': 4000.0,
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'ip': '10.1.1.2', 'port': 10000, 'device': 'sdb'})
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rb.add_dev({'region': 1, 'zone': 2, 'weight': 4000.0,
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'ip': '10.1.1.3', 'port': 10000, 'device': 'sda'})
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rb.add_dev({'region': 1, 'zone': 2, 'weight': 4000.0,
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'ip': '10.1.1.3', 'port': 10000, 'device': 'sdb'})
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_, balance = rb.rebalance(seed=2)
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# maybe not *perfect*, but should be close
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self.assert_(balance <= 1)
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def test_multitier_partial(self):
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# Multitier test, nothing full
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rb = ring.RingBuilder(8, 3, 1)
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rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10000, 'device': 'sda'})
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rb.add_dev({'id': 1, 'region': 1, 'zone': 1, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10000, 'device': 'sdb'})
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rb.add_dev({'id': 2, 'region': 2, 'zone': 2, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10000, 'device': 'sdc'})
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rb.add_dev({'id': 3, 'region': 3, 'zone': 3, 'weight': 1,
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'ip': '127.0.0.1', 'port': 10000, 'device': 'sdd'})
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rb.rebalance()
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rb.validate()
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for part in xrange(rb.parts):
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counts = defaultdict(lambda: defaultdict(int))
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for replica in xrange(rb.replicas):
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dev = rb.devs[rb._replica2part2dev[replica][part]]
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counts['region'][dev['region']] += 1
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counts['zone'][dev['zone']] += 1
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if any(c > 1 for c in counts['region'].values()):
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raise AssertionError(
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"Partition %d not evenly region-distributed (got %r)" %
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(part, counts['region']))
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if any(c > 1 for c in counts['zone'].values()):
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raise AssertionError(
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"Partition %d not evenly zone-distributed (got %r)" %
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(part, counts['zone']))
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|
|
|
# Multitier test, zones full, nodes not full
|
|
rb = ring.RingBuilder(8, 6, 1)
|
|
rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdb'})
|
|
rb.add_dev({'id': 2, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdc'})
|
|
|
|
rb.add_dev({'id': 3, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sdd'})
|
|
rb.add_dev({'id': 4, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sde'})
|
|
rb.add_dev({'id': 5, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sdf'})
|
|
|
|
rb.add_dev({'id': 6, 'region': 0, 'zone': 2, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10002, 'device': 'sdg'})
|
|
rb.add_dev({'id': 7, 'region': 0, 'zone': 2, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10002, 'device': 'sdh'})
|
|
rb.add_dev({'id': 8, 'region': 0, 'zone': 2, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10002, 'device': 'sdi'})
|
|
|
|
rb.rebalance()
|
|
rb.validate()
|
|
|
|
for part in xrange(rb.parts):
|
|
counts = defaultdict(lambda: defaultdict(int))
|
|
for replica in xrange(rb.replicas):
|
|
dev = rb.devs[rb._replica2part2dev[replica][part]]
|
|
counts['zone'][dev['zone']] += 1
|
|
counts['dev_id'][dev['id']] += 1
|
|
if counts['zone'] != {0: 2, 1: 2, 2: 2}:
|
|
raise AssertionError(
|
|
"Partition %d not evenly distributed (got %r)" %
|
|
(part, counts['zone']))
|
|
for dev_id, replica_count in counts['dev_id'].iteritems():
|
|
if replica_count > 1:
|
|
raise AssertionError(
|
|
"Partition %d is on device %d more than once (%r)" %
|
|
(part, dev_id, counts['dev_id']))
|
|
|
|
def test_multitier_full(self):
|
|
# Multitier test, #replicas == #devs
|
|
rb = ring.RingBuilder(8, 6, 1)
|
|
rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdb'})
|
|
|
|
rb.add_dev({'id': 2, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdc'})
|
|
rb.add_dev({'id': 3, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sdd'})
|
|
|
|
rb.add_dev({'id': 4, 'region': 0, 'zone': 2, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sde'})
|
|
rb.add_dev({'id': 5, 'region': 0, 'zone': 2, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sdf'})
|
|
|
|
rb.rebalance()
|
|
rb.validate()
|
|
|
|
for part in xrange(rb.parts):
|
|
counts = defaultdict(lambda: defaultdict(int))
|
|
for replica in xrange(rb.replicas):
|
|
dev = rb.devs[rb._replica2part2dev[replica][part]]
|
|
counts['zone'][dev['zone']] += 1
|
|
counts['dev_id'][dev['id']] += 1
|
|
if counts['zone'] != {0: 2, 1: 2, 2: 2}:
|
|
raise AssertionError(
|
|
"Partition %d not evenly distributed (got %r)" %
|
|
(part, counts['zone']))
|
|
for dev_id, replica_count in counts['dev_id'].iteritems():
|
|
if replica_count != 1:
|
|
raise AssertionError(
|
|
"Partition %d is on device %d %d times, not 1 (%r)" %
|
|
(part, dev_id, replica_count, counts['dev_id']))
|
|
|
|
def test_multitier_overfull(self):
|
|
# Multitier test, #replicas > #devs + 2 (to prove even distribution)
|
|
rb = ring.RingBuilder(8, 8, 1)
|
|
rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdb'})
|
|
|
|
rb.add_dev({'id': 2, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdc'})
|
|
rb.add_dev({'id': 3, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sdd'})
|
|
|
|
rb.add_dev({'id': 4, 'region': 0, 'zone': 2, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sde'})
|
|
rb.add_dev({'id': 5, 'region': 0, 'zone': 2, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sdf'})
|
|
|
|
rb.rebalance()
|
|
rb.validate()
|
|
|
|
for part in xrange(rb.parts):
|
|
counts = defaultdict(lambda: defaultdict(int))
|
|
for replica in xrange(rb.replicas):
|
|
dev = rb.devs[rb._replica2part2dev[replica][part]]
|
|
counts['zone'][dev['zone']] += 1
|
|
counts['dev_id'][dev['id']] += 1
|
|
|
|
self.assertEquals(8, sum(counts['zone'].values()))
|
|
for zone, replica_count in counts['zone'].iteritems():
|
|
if replica_count not in (2, 3):
|
|
raise AssertionError(
|
|
"Partition %d not evenly distributed (got %r)" %
|
|
(part, counts['zone']))
|
|
for dev_id, replica_count in counts['dev_id'].iteritems():
|
|
if replica_count not in (1, 2):
|
|
raise AssertionError(
|
|
"Partition %d is on device %d %d times, "
|
|
"not 1 or 2 (%r)" %
|
|
(part, dev_id, replica_count, counts['dev_id']))
|
|
|
|
def test_multitier_expansion_more_devices(self):
|
|
rb = ring.RingBuilder(8, 6, 1)
|
|
rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdb'})
|
|
rb.add_dev({'id': 2, 'region': 0, 'zone': 2, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdc'})
|
|
|
|
rb.rebalance()
|
|
rb.validate()
|
|
|
|
rb.add_dev({'id': 3, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdd'})
|
|
rb.add_dev({'id': 4, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sde'})
|
|
rb.add_dev({'id': 5, 'region': 0, 'zone': 2, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdf'})
|
|
|
|
for _ in xrange(5):
|
|
rb.pretend_min_part_hours_passed()
|
|
rb.rebalance()
|
|
rb.validate()
|
|
|
|
for part in xrange(rb.parts):
|
|
counts = dict(zone=defaultdict(int),
|
|
dev_id=defaultdict(int))
|
|
for replica in xrange(rb.replicas):
|
|
dev = rb.devs[rb._replica2part2dev[replica][part]]
|
|
counts['zone'][dev['zone']] += 1
|
|
counts['dev_id'][dev['id']] += 1
|
|
|
|
self.assertEquals({0: 2, 1: 2, 2: 2}, dict(counts['zone']))
|
|
self.assertEquals({0: 1, 1: 1, 2: 1, 3: 1, 4: 1, 5: 1},
|
|
dict(counts['dev_id']))
|
|
|
|
def test_multitier_part_moves_with_0_min_part_hours(self):
|
|
rb = ring.RingBuilder(8, 3, 0)
|
|
rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda1'})
|
|
rb.rebalance()
|
|
rb.validate()
|
|
|
|
# min_part_hours is 0, so we're clear to move 2 replicas to
|
|
# new devs
|
|
rb.add_dev({'id': 1, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdb1'})
|
|
rb.add_dev({'id': 2, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdc1'})
|
|
rb.rebalance()
|
|
rb.validate()
|
|
|
|
for part in xrange(rb.parts):
|
|
devs = set()
|
|
for replica in xrange(rb.replicas):
|
|
devs.add(rb._replica2part2dev[replica][part])
|
|
|
|
if len(devs) != 3:
|
|
raise AssertionError(
|
|
"Partition %d not on 3 devs (got %r)" % (part, devs))
|
|
|
|
def test_multitier_part_moves_with_positive_min_part_hours(self):
|
|
rb = ring.RingBuilder(8, 3, 99)
|
|
rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda1'})
|
|
rb.rebalance()
|
|
rb.validate()
|
|
|
|
# min_part_hours is >0, so we'll only be able to move 1
|
|
# replica to a new home
|
|
rb.add_dev({'id': 1, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdb1'})
|
|
rb.add_dev({'id': 2, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdc1'})
|
|
rb.pretend_min_part_hours_passed()
|
|
rb.rebalance()
|
|
rb.validate()
|
|
|
|
for part in xrange(rb.parts):
|
|
devs = set()
|
|
for replica in xrange(rb.replicas):
|
|
devs.add(rb._replica2part2dev[replica][part])
|
|
|
|
if len(devs) != 2:
|
|
raise AssertionError(
|
|
"Partition %d not on 2 devs (got %r)" % (part, devs))
|
|
|
|
def test_multitier_dont_move_too_many_replicas(self):
|
|
rb = ring.RingBuilder(8, 3, 0)
|
|
# there'll be at least one replica in z0 and z1
|
|
rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda1'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdb1'})
|
|
rb.rebalance()
|
|
rb.validate()
|
|
|
|
# only 1 replica should move
|
|
rb.add_dev({'id': 2, 'region': 0, 'zone': 2, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdd1'})
|
|
rb.add_dev({'id': 3, 'region': 0, 'zone': 3, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sde1'})
|
|
rb.add_dev({'id': 4, 'region': 0, 'zone': 4, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdf1'})
|
|
rb.rebalance()
|
|
rb.validate()
|
|
|
|
for part in xrange(rb.parts):
|
|
zones = set()
|
|
for replica in xrange(rb.replicas):
|
|
zones.add(rb.devs[rb._replica2part2dev[replica][part]]['zone'])
|
|
|
|
if len(zones) != 3:
|
|
raise AssertionError(
|
|
"Partition %d not in 3 zones (got %r)" % (part, zones))
|
|
if 0 not in zones or 1 not in zones:
|
|
raise AssertionError(
|
|
"Partition %d not in zones 0 and 1 (got %r)" %
|
|
(part, zones))
|
|
|
|
def test_rerebalance(self):
|
|
rb = ring.RingBuilder(8, 3, 1)
|
|
rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda1'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sda1'})
|
|
rb.add_dev({'id': 2, 'region': 0, 'zone': 2, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10002, 'device': 'sda1'})
|
|
rb.rebalance()
|
|
r = rb.get_ring()
|
|
counts = {}
|
|
for part2dev_id in r._replica2part2dev_id:
|
|
for dev_id in part2dev_id:
|
|
counts[dev_id] = counts.get(dev_id, 0) + 1
|
|
self.assertEquals(counts, {0: 256, 1: 256, 2: 256})
|
|
rb.add_dev({'id': 3, 'region': 0, 'zone': 3, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10003, 'device': 'sda1'})
|
|
rb.pretend_min_part_hours_passed()
|
|
rb.rebalance()
|
|
r = rb.get_ring()
|
|
counts = {}
|
|
for part2dev_id in r._replica2part2dev_id:
|
|
for dev_id in part2dev_id:
|
|
counts[dev_id] = counts.get(dev_id, 0) + 1
|
|
self.assertEquals(counts, {0: 192, 1: 192, 2: 192, 3: 192})
|
|
rb.set_dev_weight(3, 100)
|
|
rb.rebalance()
|
|
r = rb.get_ring()
|
|
counts = {}
|
|
for part2dev_id in r._replica2part2dev_id:
|
|
for dev_id in part2dev_id:
|
|
counts[dev_id] = counts.get(dev_id, 0) + 1
|
|
self.assertEquals(counts[3], 256)
|
|
|
|
def test_add_rebalance_add_rebalance_delete_rebalance(self):
|
|
# Test for https://bugs.launchpad.net/swift/+bug/845952
|
|
# min_part of 0 to allow for rapid rebalancing
|
|
rb = ring.RingBuilder(8, 3, 0)
|
|
rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda1'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sda1'})
|
|
rb.add_dev({'id': 2, 'region': 0, 'zone': 2, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10002, 'device': 'sda1'})
|
|
|
|
rb.rebalance()
|
|
|
|
rb.add_dev({'id': 3, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10003, 'device': 'sda1'})
|
|
rb.add_dev({'id': 4, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10004, 'device': 'sda1'})
|
|
rb.add_dev({'id': 5, 'region': 0, 'zone': 2, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10005, 'device': 'sda1'})
|
|
|
|
rb.rebalance()
|
|
|
|
rb.remove_dev(1)
|
|
|
|
rb.rebalance()
|
|
|
|
def test_remove_last_partition_from_zero_weight(self):
|
|
rb = ring.RingBuilder(4, 3, 1)
|
|
rb.add_dev({'id': 0, 'region': 0, 'zone': 1, 'weight': 1.0,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'zone': 2, 'weight': 2.0,
|
|
'ip': '127.0.0.2', 'port': 10000, 'device': 'sda'})
|
|
rb.add_dev({'id': 2, 'region': 0, 'zone': 3, 'weight': 3.0,
|
|
'ip': '127.0.0.3', 'port': 10000, 'device': 'sda'})
|
|
|
|
rb.add_dev({'id': 3, 'region': 0, 'zone': 3, 'weight': 0.5,
|
|
'ip': '127.0.0.3', 'port': 10001, 'device': 'zero'})
|
|
|
|
zero_weight_dev = 3
|
|
|
|
rb.rebalance()
|
|
|
|
# We want at least one partition with replicas only in zone 2 and 3
|
|
# due to device weights. It would *like* to spread out into zone 1,
|
|
# but can't, due to device weight.
|
|
#
|
|
# Also, we want such a partition to have a replica on device 3,
|
|
# which we will then reduce to zero weight. This should cause the
|
|
# removal of the replica from device 3.
|
|
#
|
|
# Getting this to happen by chance is hard, so let's just set up a
|
|
# builder so that it's in the state we want. This is a synthetic
|
|
# example; while the bug has happened on a real cluster, that
|
|
# builder file had a part_power of 16, so its contents are much too
|
|
# big to include here.
|
|
rb._replica2part2dev = [
|
|
# these are the relevant ones
|
|
# | | | |
|
|
# v v v v
|
|
array('H', [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2]),
|
|
array('H', [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2]),
|
|
array('H', [0, 0, 0, 0, 0, 0, 0, 0, 3, 3, 3, 3, 2, 2, 2, 2])]
|
|
|
|
rb.set_dev_weight(zero_weight_dev, 0.0)
|
|
rb.pretend_min_part_hours_passed()
|
|
rb.rebalance(seed=1)
|
|
|
|
node_counts = defaultdict(int)
|
|
for part2dev_id in rb._replica2part2dev:
|
|
for dev_id in part2dev_id:
|
|
node_counts[dev_id] += 1
|
|
self.assertEqual(node_counts[zero_weight_dev], 0)
|
|
|
|
# it's as balanced as it gets, so nothing moves anymore
|
|
rb.pretend_min_part_hours_passed()
|
|
parts_moved, _balance = rb.rebalance(seed=1)
|
|
self.assertEqual(parts_moved, 0)
|
|
|
|
def test_region_fullness_with_balanceable_ring(self):
|
|
rb = ring.RingBuilder(8, 3, 1)
|
|
rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda1'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sda1'})
|
|
|
|
rb.add_dev({'id': 2, 'region': 1, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10003, 'device': 'sda1'})
|
|
rb.add_dev({'id': 3, 'region': 1, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10004, 'device': 'sda1'})
|
|
|
|
rb.add_dev({'id': 4, 'region': 2, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10005, 'device': 'sda1'})
|
|
rb.add_dev({'id': 5, 'region': 2, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10006, 'device': 'sda1'})
|
|
|
|
rb.add_dev({'id': 6, 'region': 3, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10007, 'device': 'sda1'})
|
|
rb.add_dev({'id': 7, 'region': 3, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10008, 'device': 'sda1'})
|
|
rb.rebalance(seed=2)
|
|
|
|
population_by_region = self._get_population_by_region(rb)
|
|
self.assertEquals(population_by_region,
|
|
{0: 192, 1: 192, 2: 192, 3: 192})
|
|
|
|
def test_region_fullness_with_unbalanceable_ring(self):
|
|
rb = ring.RingBuilder(8, 3, 1)
|
|
rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 2,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda1'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'zone': 1, 'weight': 2,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sda1'})
|
|
|
|
rb.add_dev({'id': 2, 'region': 1, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10003, 'device': 'sda1'})
|
|
rb.add_dev({'id': 3, 'region': 1, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10004, 'device': 'sda1'})
|
|
rb.rebalance(seed=2)
|
|
|
|
population_by_region = self._get_population_by_region(rb)
|
|
self.assertEquals(population_by_region, {0: 512, 1: 256})
|
|
|
|
def test_adding_region_slowly_with_unbalanceable_ring(self):
|
|
rb = ring.RingBuilder(8, 3, 1)
|
|
rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 2,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda1'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'zone': 1, 'weight': 2,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sda1'})
|
|
rb.rebalance(seed=2)
|
|
|
|
rb.add_dev({'id': 2, 'region': 1, 'zone': 0, 'weight': 0.25,
|
|
'ip': '127.0.0.1', 'port': 10003, 'device': 'sda1'})
|
|
rb.add_dev({'id': 3, 'region': 1, 'zone': 1, 'weight': 0.25,
|
|
'ip': '127.0.0.1', 'port': 10004, 'device': 'sda1'})
|
|
rb.pretend_min_part_hours_passed()
|
|
changed_parts, _balance = rb.rebalance(seed=2)
|
|
|
|
# there's not enough room in r1 for every partition to have a replica
|
|
# in it, so only 86 assignments occur in r1 (that's ~1/5 of the total,
|
|
# since r1 has 1/5 of the weight).
|
|
population_by_region = self._get_population_by_region(rb)
|
|
self.assertEquals(population_by_region, {0: 682, 1: 86})
|
|
|
|
self.assertEqual(87, changed_parts)
|
|
|
|
# and since there's not enough room, subsequent rebalances will not
|
|
# cause additional assignments to r1
|
|
rb.pretend_min_part_hours_passed()
|
|
rb.rebalance(seed=2)
|
|
population_by_region = self._get_population_by_region(rb)
|
|
self.assertEquals(population_by_region, {0: 682, 1: 86})
|
|
|
|
# after you add more weight, more partition assignments move
|
|
rb.set_dev_weight(2, 0.5)
|
|
rb.set_dev_weight(3, 0.5)
|
|
rb.pretend_min_part_hours_passed()
|
|
rb.rebalance(seed=2)
|
|
population_by_region = self._get_population_by_region(rb)
|
|
self.assertEquals(population_by_region, {0: 614, 1: 154})
|
|
|
|
rb.set_dev_weight(2, 1.0)
|
|
rb.set_dev_weight(3, 1.0)
|
|
rb.pretend_min_part_hours_passed()
|
|
rb.rebalance(seed=2)
|
|
population_by_region = self._get_population_by_region(rb)
|
|
self.assertEquals(population_by_region, {0: 512, 1: 256})
|
|
|
|
def test_avoid_tier_change_new_region(self):
|
|
rb = ring.RingBuilder(8, 3, 1)
|
|
for i in range(5):
|
|
rb.add_dev({'id': i, 'region': 0, 'zone': 0, 'weight': 100,
|
|
'ip': '127.0.0.1', 'port': i, 'device': 'sda1'})
|
|
rb.rebalance(seed=2)
|
|
|
|
# Add a new device in new region to a balanced ring
|
|
rb.add_dev({'id': 5, 'region': 1, 'zone': 0, 'weight': 0,
|
|
'ip': '127.0.0.5', 'port': 10000, 'device': 'sda1'})
|
|
|
|
# Increase the weight of region 1 slowly
|
|
moved_partitions = []
|
|
for weight in range(0, 101, 10):
|
|
rb.set_dev_weight(5, weight)
|
|
rb.pretend_min_part_hours_passed()
|
|
changed_parts, _balance = rb.rebalance(seed=2)
|
|
moved_partitions.append(changed_parts)
|
|
# Ensure that the second region has enough partitions
|
|
# Otherwise there will be replicas at risk
|
|
min_parts_for_r1 = ceil(weight / (500.0 + weight) * 768)
|
|
parts_for_r1 = self._get_population_by_region(rb).get(1, 0)
|
|
self.assertEqual(min_parts_for_r1, parts_for_r1)
|
|
|
|
# Number of partitions moved on each rebalance
|
|
# 10/510 * 768 ~ 15.06 -> move at least 15 partitions in first step
|
|
ref = [0, 17, 16, 16, 14, 15, 13, 13, 12, 12, 14]
|
|
self.assertEqual(ref, moved_partitions)
|
|
|
|
def test_set_replicas_increase(self):
|
|
rb = ring.RingBuilder(8, 2, 0)
|
|
rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda1'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sda1'})
|
|
rb.rebalance()
|
|
rb.validate()
|
|
|
|
rb.replicas = 2.1
|
|
rb.rebalance()
|
|
rb.validate()
|
|
|
|
self.assertEqual([len(p2d) for p2d in rb._replica2part2dev],
|
|
[256, 256, 25])
|
|
|
|
rb.replicas = 2.2
|
|
rb.rebalance()
|
|
rb.validate()
|
|
self.assertEqual([len(p2d) for p2d in rb._replica2part2dev],
|
|
[256, 256, 51])
|
|
|
|
def test_set_replicas_decrease(self):
|
|
rb = ring.RingBuilder(4, 5, 0)
|
|
rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda1'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sda1'})
|
|
rb.rebalance()
|
|
rb.validate()
|
|
|
|
rb.replicas = 4.9
|
|
rb.rebalance()
|
|
rb.validate()
|
|
|
|
self.assertEqual([len(p2d) for p2d in rb._replica2part2dev],
|
|
[16, 16, 16, 16, 14])
|
|
|
|
# cross a couple of integer thresholds (4 and 3)
|
|
rb.replicas = 2.5
|
|
rb.rebalance()
|
|
rb.validate()
|
|
|
|
self.assertEqual([len(p2d) for p2d in rb._replica2part2dev],
|
|
[16, 16, 8])
|
|
|
|
def test_fractional_replicas_rebalance(self):
|
|
rb = ring.RingBuilder(8, 2.5, 0)
|
|
rb.add_dev({'id': 0, 'region': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda1'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sda1'})
|
|
rb.rebalance() # passes by not crashing
|
|
rb.validate() # also passes by not crashing
|
|
self.assertEqual([len(p2d) for p2d in rb._replica2part2dev],
|
|
[256, 256, 128])
|
|
|
|
def test_create_add_dev_add_replica_rebalance(self):
|
|
rb = ring.RingBuilder(8, 3, 1)
|
|
rb.add_dev({'id': 0, 'region': 0, 'region': 0, 'zone': 0, 'weight': 3,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda'})
|
|
rb.set_replicas(4)
|
|
rb.rebalance() # this would crash since parts_wanted was not set
|
|
rb.validate()
|
|
|
|
def test_rebalance_post_upgrade(self):
|
|
rb = ring.RingBuilder(8, 3, 1)
|
|
# 5 devices: 5 is the smallest number that does not divide 3 * 2^8,
|
|
# which forces some rounding to happen.
|
|
rb.add_dev({'id': 0, 'region': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdb'})
|
|
rb.add_dev({'id': 2, 'region': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdc'})
|
|
rb.add_dev({'id': 3, 'region': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdd'})
|
|
rb.add_dev({'id': 4, 'region': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sde'})
|
|
rb.rebalance()
|
|
rb.validate()
|
|
|
|
# Older versions of the ring builder code would round down when
|
|
# computing parts_wanted, while the new code rounds up. Make sure we
|
|
# can handle a ring built by the old method.
|
|
#
|
|
# This code mimics the old _set_parts_wanted.
|
|
weight_of_one_part = rb.weight_of_one_part()
|
|
for dev in rb._iter_devs():
|
|
if not dev['weight']:
|
|
dev['parts_wanted'] = -rb.parts * rb.replicas
|
|
else:
|
|
dev['parts_wanted'] = (
|
|
int(weight_of_one_part * dev['weight']) -
|
|
dev['parts'])
|
|
|
|
rb.pretend_min_part_hours_passed()
|
|
rb.rebalance() # this crashes unless rebalance resets parts_wanted
|
|
rb.validate()
|
|
|
|
def test_add_replicas_then_rebalance_respects_weight(self):
|
|
rb = ring.RingBuilder(8, 3, 1)
|
|
rb.add_dev({'id': 0, 'region': 0, 'region': 0, 'zone': 0, 'weight': 3,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'region': 0, 'zone': 0, 'weight': 3,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdb'})
|
|
rb.add_dev({'id': 2, 'region': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdc'})
|
|
rb.add_dev({'id': 3, 'region': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdd'})
|
|
|
|
rb.add_dev({'id': 4, 'region': 0, 'region': 0, 'zone': 1, 'weight': 3,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sde'})
|
|
rb.add_dev({'id': 5, 'region': 0, 'region': 0, 'zone': 1, 'weight': 3,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdf'})
|
|
rb.add_dev({'id': 6, 'region': 0, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdg'})
|
|
rb.add_dev({'id': 7, 'region': 0, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdh'})
|
|
|
|
rb.add_dev({'id': 8, 'region': 0, 'region': 0, 'zone': 2, 'weight': 3,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdi'})
|
|
rb.add_dev({'id': 9, 'region': 0, 'region': 0, 'zone': 2, 'weight': 3,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdj'})
|
|
rb.add_dev({'id': 10, 'region': 0, 'region': 0, 'zone': 2, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdk'})
|
|
rb.add_dev({'id': 11, 'region': 0, 'region': 0, 'zone': 2, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sdl'})
|
|
|
|
rb.rebalance(seed=1)
|
|
|
|
r = rb.get_ring()
|
|
counts = {}
|
|
for part2dev_id in r._replica2part2dev_id:
|
|
for dev_id in part2dev_id:
|
|
counts[dev_id] = counts.get(dev_id, 0) + 1
|
|
self.assertEquals(counts, {0: 96, 1: 96,
|
|
2: 32, 3: 32,
|
|
4: 96, 5: 96,
|
|
6: 32, 7: 32,
|
|
8: 96, 9: 96,
|
|
10: 32, 11: 32})
|
|
|
|
rb.replicas *= 2
|
|
rb.rebalance(seed=1)
|
|
|
|
r = rb.get_ring()
|
|
counts = {}
|
|
for part2dev_id in r._replica2part2dev_id:
|
|
for dev_id in part2dev_id:
|
|
counts[dev_id] = counts.get(dev_id, 0) + 1
|
|
self.assertEquals(counts, {0: 192, 1: 192,
|
|
2: 64, 3: 64,
|
|
4: 192, 5: 192,
|
|
6: 64, 7: 64,
|
|
8: 192, 9: 192,
|
|
10: 64, 11: 64})
|
|
|
|
def test_overload(self):
|
|
rb = ring.RingBuilder(8, 3, 1)
|
|
rb.add_dev({'id': 0, 'region': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sdb'})
|
|
rb.add_dev({'id': 2, 'region': 0, 'region': 0, 'zone': 2, 'weight': 2,
|
|
'ip': '127.0.0.2', 'port': 10002, 'device': 'sdc'})
|
|
rb.rebalance(seed=12345)
|
|
|
|
# sanity check: balance respects weights, so default
|
|
part_counts = self._partition_counts(rb)
|
|
self.assertEqual(part_counts[0], 192)
|
|
self.assertEqual(part_counts[1], 192)
|
|
self.assertEqual(part_counts[2], 384)
|
|
|
|
# Devices 0 and 1 take 10% more than their fair shares by weight since
|
|
# overload is 10% (0.1).
|
|
rb.set_overload(0.1)
|
|
for _ in range(2):
|
|
rb.pretend_min_part_hours_passed()
|
|
rb.rebalance(seed=12345)
|
|
|
|
part_counts = self._partition_counts(rb)
|
|
self.assertEqual(part_counts[0], 212)
|
|
self.assertEqual(part_counts[1], 212)
|
|
self.assertEqual(part_counts[2], 344)
|
|
|
|
# Now, devices 0 and 1 take 50% more than their fair shares by
|
|
# weight.
|
|
rb.set_overload(0.5)
|
|
for _ in range(3):
|
|
rb.pretend_min_part_hours_passed()
|
|
rb.rebalance(seed=12345)
|
|
|
|
part_counts = self._partition_counts(rb)
|
|
self.assertEqual(part_counts[0], 256)
|
|
self.assertEqual(part_counts[1], 256)
|
|
self.assertEqual(part_counts[2], 256)
|
|
|
|
# Devices 0 and 1 may take up to 75% over their fair share, but the
|
|
# placement algorithm only wants to spread things out evenly between
|
|
# all drives, so the devices stay at 50% more.
|
|
rb.set_overload(0.75)
|
|
for _ in range(3):
|
|
rb.pretend_min_part_hours_passed()
|
|
rb.rebalance(seed=12345)
|
|
|
|
part_counts = self._partition_counts(rb)
|
|
self.assertEqual(part_counts[0], 256)
|
|
self.assertEqual(part_counts[1], 256)
|
|
self.assertEqual(part_counts[2], 256)
|
|
|
|
def test_overload_keeps_balanceable_things_balanced_initially(self):
|
|
rb = ring.RingBuilder(8, 3, 1)
|
|
rb.add_dev({'id': 0, 'region': 0, 'region': 0, 'zone': 0, 'weight': 8,
|
|
'ip': '10.0.0.1', 'port': 10000, 'device': 'sda'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'region': 0, 'zone': 0, 'weight': 8,
|
|
'ip': '10.0.0.1', 'port': 10000, 'device': 'sdb'})
|
|
|
|
rb.add_dev({'id': 2, 'region': 0, 'region': 0, 'zone': 0, 'weight': 4,
|
|
'ip': '10.0.0.2', 'port': 10000, 'device': 'sda'})
|
|
rb.add_dev({'id': 3, 'region': 0, 'region': 0, 'zone': 0, 'weight': 4,
|
|
'ip': '10.0.0.2', 'port': 10000, 'device': 'sdb'})
|
|
|
|
rb.add_dev({'id': 4, 'region': 0, 'region': 0, 'zone': 0, 'weight': 4,
|
|
'ip': '10.0.0.3', 'port': 10000, 'device': 'sda'})
|
|
rb.add_dev({'id': 5, 'region': 0, 'region': 0, 'zone': 0, 'weight': 4,
|
|
'ip': '10.0.0.3', 'port': 10000, 'device': 'sdb'})
|
|
|
|
rb.add_dev({'id': 6, 'region': 0, 'region': 0, 'zone': 0, 'weight': 4,
|
|
'ip': '10.0.0.4', 'port': 10000, 'device': 'sda'})
|
|
rb.add_dev({'id': 7, 'region': 0, 'region': 0, 'zone': 0, 'weight': 4,
|
|
'ip': '10.0.0.4', 'port': 10000, 'device': 'sdb'})
|
|
|
|
rb.add_dev({'id': 8, 'region': 0, 'region': 0, 'zone': 0, 'weight': 4,
|
|
'ip': '10.0.0.5', 'port': 10000, 'device': 'sda'})
|
|
rb.add_dev({'id': 9, 'region': 0, 'region': 0, 'zone': 0, 'weight': 4,
|
|
'ip': '10.0.0.5', 'port': 10000, 'device': 'sdb'})
|
|
|
|
rb.set_overload(99999)
|
|
rb.rebalance(seed=12345)
|
|
|
|
part_counts = self._partition_counts(rb)
|
|
self.assertEqual(part_counts, {
|
|
0: 128,
|
|
1: 128,
|
|
2: 64,
|
|
3: 64,
|
|
4: 64,
|
|
5: 64,
|
|
6: 64,
|
|
7: 64,
|
|
8: 64,
|
|
9: 64,
|
|
})
|
|
|
|
def test_overload_keeps_balanceable_things_balanced_on_rebalance(self):
|
|
rb = ring.RingBuilder(8, 3, 1)
|
|
rb.add_dev({'id': 0, 'region': 0, 'region': 0, 'zone': 0, 'weight': 8,
|
|
'ip': '10.0.0.1', 'port': 10000, 'device': 'sda'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'region': 0, 'zone': 0, 'weight': 8,
|
|
'ip': '10.0.0.1', 'port': 10000, 'device': 'sdb'})
|
|
|
|
rb.add_dev({'id': 2, 'region': 0, 'region': 0, 'zone': 0, 'weight': 4,
|
|
'ip': '10.0.0.2', 'port': 10000, 'device': 'sda'})
|
|
rb.add_dev({'id': 3, 'region': 0, 'region': 0, 'zone': 0, 'weight': 4,
|
|
'ip': '10.0.0.2', 'port': 10000, 'device': 'sdb'})
|
|
|
|
rb.add_dev({'id': 4, 'region': 0, 'region': 0, 'zone': 0, 'weight': 4,
|
|
'ip': '10.0.0.3', 'port': 10000, 'device': 'sda'})
|
|
rb.add_dev({'id': 5, 'region': 0, 'region': 0, 'zone': 0, 'weight': 4,
|
|
'ip': '10.0.0.3', 'port': 10000, 'device': 'sdb'})
|
|
|
|
rb.add_dev({'id': 6, 'region': 0, 'region': 0, 'zone': 0, 'weight': 4,
|
|
'ip': '10.0.0.4', 'port': 10000, 'device': 'sda'})
|
|
rb.add_dev({'id': 7, 'region': 0, 'region': 0, 'zone': 0, 'weight': 4,
|
|
'ip': '10.0.0.4', 'port': 10000, 'device': 'sdb'})
|
|
|
|
rb.add_dev({'id': 8, 'region': 0, 'region': 0, 'zone': 0, 'weight': 4,
|
|
'ip': '10.0.0.5', 'port': 10000, 'device': 'sda'})
|
|
rb.add_dev({'id': 9, 'region': 0, 'region': 0, 'zone': 0, 'weight': 4,
|
|
'ip': '10.0.0.5', 'port': 10000, 'device': 'sdb'})
|
|
|
|
rb.set_overload(99999)
|
|
|
|
rb.rebalance(seed=123)
|
|
part_counts = self._partition_counts(rb)
|
|
self.assertEqual(part_counts, {
|
|
0: 128,
|
|
1: 128,
|
|
2: 64,
|
|
3: 64,
|
|
4: 64,
|
|
5: 64,
|
|
6: 64,
|
|
7: 64,
|
|
8: 64,
|
|
9: 64,
|
|
})
|
|
|
|
# swap weights between 10.0.0.1 and 10.0.0.2
|
|
rb.set_dev_weight(0, 4)
|
|
rb.set_dev_weight(1, 4)
|
|
rb.set_dev_weight(2, 8)
|
|
rb.set_dev_weight(1, 8)
|
|
|
|
rb.rebalance(seed=456)
|
|
part_counts = self._partition_counts(rb)
|
|
self.assertEqual(part_counts, {
|
|
0: 128,
|
|
1: 128,
|
|
2: 64,
|
|
3: 64,
|
|
4: 64,
|
|
5: 64,
|
|
6: 64,
|
|
7: 64,
|
|
8: 64,
|
|
9: 64,
|
|
})
|
|
|
|
def test_load(self):
|
|
rb = ring.RingBuilder(8, 3, 1)
|
|
devs = [{'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.0', 'port': 10000, 'device': 'sda1',
|
|
'meta': 'meta0'},
|
|
{'id': 1, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sdb1',
|
|
'meta': 'meta1'},
|
|
{'id': 2, 'region': 0, 'zone': 2, 'weight': 2,
|
|
'ip': '127.0.0.2', 'port': 10002, 'device': 'sdc1',
|
|
'meta': 'meta2'},
|
|
{'id': 3, 'region': 0, 'zone': 3, 'weight': 2,
|
|
'ip': '127.0.0.3', 'port': 10003, 'device': 'sdd1'}]
|
|
for d in devs:
|
|
rb.add_dev(d)
|
|
rb.rebalance()
|
|
|
|
real_pickle = pickle.load
|
|
fake_open = mock.mock_open()
|
|
|
|
io_error_not_found = IOError()
|
|
io_error_not_found.errno = errno.ENOENT
|
|
|
|
io_error_no_perm = IOError()
|
|
io_error_no_perm.errno = errno.EPERM
|
|
|
|
io_error_generic = IOError()
|
|
io_error_generic.errno = errno.EOPNOTSUPP
|
|
try:
|
|
#test a legit builder
|
|
fake_pickle = mock.Mock(return_value=rb)
|
|
pickle.load = fake_pickle
|
|
builder = ring.RingBuilder.load('fake.builder', open=fake_open)
|
|
self.assertEquals(fake_pickle.call_count, 1)
|
|
fake_open.assert_has_calls([mock.call('fake.builder', 'rb')])
|
|
self.assertEquals(builder, rb)
|
|
fake_pickle.reset_mock()
|
|
|
|
#test old style builder
|
|
fake_pickle.return_value = rb.to_dict()
|
|
pickle.load = fake_pickle
|
|
builder = ring.RingBuilder.load('fake.builder', open=fake_open)
|
|
fake_open.assert_has_calls([mock.call('fake.builder', 'rb')])
|
|
self.assertEquals(builder.devs, rb.devs)
|
|
fake_pickle.reset_mock()
|
|
|
|
#test old devs but no meta
|
|
no_meta_builder = rb
|
|
for dev in no_meta_builder.devs:
|
|
del(dev['meta'])
|
|
fake_pickle.return_value = no_meta_builder
|
|
pickle.load = fake_pickle
|
|
builder = ring.RingBuilder.load('fake.builder', open=fake_open)
|
|
fake_open.assert_has_calls([mock.call('fake.builder', 'rb')])
|
|
self.assertEquals(builder.devs, rb.devs)
|
|
|
|
#test an empty builder
|
|
fake_pickle.side_effect = EOFError
|
|
pickle.load = fake_pickle
|
|
self.assertRaises(exceptions.UnPicklingError,
|
|
ring.RingBuilder.load, 'fake.builder',
|
|
open=fake_open)
|
|
|
|
#test a corrupted builder
|
|
fake_pickle.side_effect = pickle.UnpicklingError
|
|
pickle.load = fake_pickle
|
|
self.assertRaises(exceptions.UnPicklingError,
|
|
ring.RingBuilder.load, 'fake.builder',
|
|
open=fake_open)
|
|
|
|
#test some error
|
|
fake_pickle.side_effect = AttributeError
|
|
pickle.load = fake_pickle
|
|
self.assertRaises(exceptions.UnPicklingError,
|
|
ring.RingBuilder.load, 'fake.builder',
|
|
open=fake_open)
|
|
finally:
|
|
pickle.load = real_pickle
|
|
|
|
#test non existent builder file
|
|
fake_open.side_effect = io_error_not_found
|
|
self.assertRaises(exceptions.FileNotFoundError,
|
|
ring.RingBuilder.load, 'fake.builder',
|
|
open=fake_open)
|
|
|
|
#test non accessible builder file
|
|
fake_open.side_effect = io_error_no_perm
|
|
self.assertRaises(exceptions.PermissionError,
|
|
ring.RingBuilder.load, 'fake.builder',
|
|
open=fake_open)
|
|
|
|
#test an error other then ENOENT and ENOPERM
|
|
fake_open.side_effect = io_error_generic
|
|
self.assertRaises(IOError,
|
|
ring.RingBuilder.load, 'fake.builder',
|
|
open=fake_open)
|
|
|
|
def test_save_load(self):
|
|
rb = ring.RingBuilder(8, 3, 1)
|
|
devs = [{'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.0', 'port': 10000,
|
|
'replication_ip': '127.0.0.0', 'replication_port': 10000,
|
|
'device': 'sda1', 'meta': 'meta0'},
|
|
{'id': 1, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001,
|
|
'replication_ip': '127.0.0.1', 'replication_port': 10001,
|
|
'device': 'sdb1', 'meta': 'meta1'},
|
|
{'id': 2, 'region': 0, 'zone': 2, 'weight': 2,
|
|
'ip': '127.0.0.2', 'port': 10002,
|
|
'replication_ip': '127.0.0.2', 'replication_port': 10002,
|
|
'device': 'sdc1', 'meta': 'meta2'},
|
|
{'id': 3, 'region': 0, 'zone': 3, 'weight': 2,
|
|
'ip': '127.0.0.3', 'port': 10003,
|
|
'replication_ip': '127.0.0.3', 'replication_port': 10003,
|
|
'device': 'sdd1', 'meta': ''}]
|
|
rb.set_overload(3.14159)
|
|
for d in devs:
|
|
rb.add_dev(d)
|
|
rb.rebalance()
|
|
builder_file = os.path.join(self.testdir, 'test_save.builder')
|
|
rb.save(builder_file)
|
|
loaded_rb = ring.RingBuilder.load(builder_file)
|
|
self.maxDiff = None
|
|
self.assertEquals(loaded_rb.to_dict(), rb.to_dict())
|
|
self.assertEquals(loaded_rb.overload, 3.14159)
|
|
|
|
@mock.patch('__builtin__.open', autospec=True)
|
|
@mock.patch('swift.common.ring.builder.pickle.dump', autospec=True)
|
|
def test_save(self, mock_pickle_dump, mock_open):
|
|
mock_open.return_value = mock_fh = mock.MagicMock()
|
|
rb = ring.RingBuilder(8, 3, 1)
|
|
devs = [{'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.0', 'port': 10000, 'device': 'sda1',
|
|
'meta': 'meta0'},
|
|
{'id': 1, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sdb1',
|
|
'meta': 'meta1'},
|
|
{'id': 2, 'region': 0, 'zone': 2, 'weight': 2,
|
|
'ip': '127.0.0.2', 'port': 10002, 'device': 'sdc1',
|
|
'meta': 'meta2'},
|
|
{'id': 3, 'region': 0, 'zone': 3, 'weight': 2,
|
|
'ip': '127.0.0.3', 'port': 10003, 'device': 'sdd1'}]
|
|
for d in devs:
|
|
rb.add_dev(d)
|
|
rb.rebalance()
|
|
rb.save('some.builder')
|
|
mock_open.assert_called_once_with('some.builder', 'wb')
|
|
mock_pickle_dump.assert_called_once_with(rb.to_dict(),
|
|
mock_fh.__enter__(),
|
|
protocol=2)
|
|
|
|
def test_search_devs(self):
|
|
rb = ring.RingBuilder(8, 3, 1)
|
|
devs = [{'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.0', 'port': 10000, 'device': 'sda1',
|
|
'meta': 'meta0'},
|
|
{'id': 1, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sdb1',
|
|
'meta': 'meta1'},
|
|
{'id': 2, 'region': 1, 'zone': 2, 'weight': 2,
|
|
'ip': '127.0.0.2', 'port': 10002, 'device': 'sdc1',
|
|
'meta': 'meta2'},
|
|
{'id': 3, 'region': 1, 'zone': 3, 'weight': 2,
|
|
'ip': '127.0.0.3', 'port': 10003, 'device': 'sdd1',
|
|
'meta': 'meta3'},
|
|
{'id': 4, 'region': 2, 'zone': 4, 'weight': 1,
|
|
'ip': '127.0.0.4', 'port': 10004, 'device': 'sde1',
|
|
'meta': 'meta4', 'replication_ip': '127.0.0.10',
|
|
'replication_port': 20000},
|
|
{'id': 5, 'region': 2, 'zone': 5, 'weight': 2,
|
|
'ip': '127.0.0.5', 'port': 10005, 'device': 'sdf1',
|
|
'meta': 'meta5', 'replication_ip': '127.0.0.11',
|
|
'replication_port': 20001},
|
|
{'id': 6, 'region': 2, 'zone': 6, 'weight': 2,
|
|
'ip': '127.0.0.6', 'port': 10006, 'device': 'sdg1',
|
|
'meta': 'meta6', 'replication_ip': '127.0.0.12',
|
|
'replication_port': 20002}]
|
|
for d in devs:
|
|
rb.add_dev(d)
|
|
rb.rebalance()
|
|
res = rb.search_devs({'region': 0})
|
|
self.assertEquals(res, [devs[0], devs[1]])
|
|
res = rb.search_devs({'region': 1})
|
|
self.assertEquals(res, [devs[2], devs[3]])
|
|
res = rb.search_devs({'region': 1, 'zone': 2})
|
|
self.assertEquals(res, [devs[2]])
|
|
res = rb.search_devs({'id': 1})
|
|
self.assertEquals(res, [devs[1]])
|
|
res = rb.search_devs({'zone': 1})
|
|
self.assertEquals(res, [devs[1]])
|
|
res = rb.search_devs({'ip': '127.0.0.1'})
|
|
self.assertEquals(res, [devs[1]])
|
|
res = rb.search_devs({'ip': '127.0.0.1', 'port': 10001})
|
|
self.assertEquals(res, [devs[1]])
|
|
res = rb.search_devs({'port': 10001})
|
|
self.assertEquals(res, [devs[1]])
|
|
res = rb.search_devs({'replication_ip': '127.0.0.10'})
|
|
self.assertEquals(res, [devs[4]])
|
|
res = rb.search_devs({'replication_ip': '127.0.0.10',
|
|
'replication_port': 20000})
|
|
self.assertEquals(res, [devs[4]])
|
|
res = rb.search_devs({'replication_port': 20000})
|
|
self.assertEquals(res, [devs[4]])
|
|
res = rb.search_devs({'device': 'sdb1'})
|
|
self.assertEquals(res, [devs[1]])
|
|
res = rb.search_devs({'meta': 'meta1'})
|
|
self.assertEquals(res, [devs[1]])
|
|
|
|
def test_validate(self):
|
|
rb = ring.RingBuilder(8, 3, 1)
|
|
rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda1'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sda1'})
|
|
rb.add_dev({'id': 2, 'region': 0, 'zone': 2, 'weight': 2,
|
|
'ip': '127.0.0.1', 'port': 10002, 'device': 'sda1'})
|
|
rb.add_dev({'id': 3, 'region': 0, 'zone': 3, 'weight': 2,
|
|
'ip': '127.0.0.1', 'port': 10003, 'device': 'sda1'})
|
|
|
|
# Degenerate case: devices added but not rebalanced yet
|
|
self.assertRaises(exceptions.RingValidationError, rb.validate)
|
|
|
|
rb.rebalance()
|
|
r = rb.get_ring()
|
|
counts = {}
|
|
for part2dev_id in r._replica2part2dev_id:
|
|
for dev_id in part2dev_id:
|
|
counts[dev_id] = counts.get(dev_id, 0) + 1
|
|
self.assertEquals(counts, {0: 128, 1: 128, 2: 256, 3: 256})
|
|
|
|
dev_usage, worst = rb.validate()
|
|
self.assert_(dev_usage is None)
|
|
self.assert_(worst is None)
|
|
|
|
dev_usage, worst = rb.validate(stats=True)
|
|
self.assertEquals(list(dev_usage), [128, 128, 256, 256])
|
|
self.assertEquals(int(worst), 0)
|
|
|
|
rb.set_dev_weight(2, 0)
|
|
rb.rebalance()
|
|
self.assertEquals(rb.validate(stats=True)[1], MAX_BALANCE)
|
|
|
|
# Test not all partitions doubly accounted for
|
|
rb.devs[1]['parts'] -= 1
|
|
self.assertRaises(exceptions.RingValidationError, rb.validate)
|
|
rb.devs[1]['parts'] += 1
|
|
|
|
# Test non-numeric port
|
|
rb.devs[1]['port'] = '10001'
|
|
self.assertRaises(exceptions.RingValidationError, rb.validate)
|
|
rb.devs[1]['port'] = 10001
|
|
|
|
# Test partition on nonexistent device
|
|
rb.pretend_min_part_hours_passed()
|
|
orig_dev_id = rb._replica2part2dev[0][0]
|
|
rb._replica2part2dev[0][0] = len(rb.devs)
|
|
self.assertRaises(exceptions.RingValidationError, rb.validate)
|
|
rb._replica2part2dev[0][0] = orig_dev_id
|
|
|
|
# Tests that validate can handle 'holes' in .devs
|
|
rb.remove_dev(2)
|
|
rb.pretend_min_part_hours_passed()
|
|
rb.rebalance()
|
|
rb.validate(stats=True)
|
|
|
|
# Test partition assigned to a hole
|
|
if rb.devs[2]:
|
|
rb.remove_dev(2)
|
|
rb.pretend_min_part_hours_passed()
|
|
orig_dev_id = rb._replica2part2dev[0][0]
|
|
rb._replica2part2dev[0][0] = 2
|
|
self.assertRaises(exceptions.RingValidationError, rb.validate)
|
|
rb._replica2part2dev[0][0] = orig_dev_id
|
|
|
|
# Validate that zero weight devices with no partitions don't count on
|
|
# the 'worst' value.
|
|
self.assertNotEquals(rb.validate(stats=True)[1], MAX_BALANCE)
|
|
rb.add_dev({'id': 4, 'region': 0, 'zone': 0, 'weight': 0,
|
|
'ip': '127.0.0.1', 'port': 10004, 'device': 'sda1'})
|
|
rb.pretend_min_part_hours_passed()
|
|
rb.rebalance()
|
|
self.assertNotEquals(rb.validate(stats=True)[1], MAX_BALANCE)
|
|
|
|
def test_get_part_devices(self):
|
|
rb = ring.RingBuilder(8, 3, 1)
|
|
self.assertEqual(rb.get_part_devices(0), [])
|
|
|
|
rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda1'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sda1'})
|
|
rb.rebalance()
|
|
|
|
part_devs = sorted(rb.get_part_devices(0),
|
|
key=operator.itemgetter('id'))
|
|
self.assertEqual(part_devs, [rb.devs[0], rb.devs[1]])
|
|
|
|
def test_get_part_devices_partial_replicas(self):
|
|
rb = ring.RingBuilder(8, 2.5, 1)
|
|
rb.add_dev({'id': 0, 'region': 0, 'zone': 0, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10000, 'device': 'sda1'})
|
|
rb.add_dev({'id': 1, 'region': 0, 'zone': 1, 'weight': 1,
|
|
'ip': '127.0.0.1', 'port': 10001, 'device': 'sda1'})
|
|
rb.rebalance()
|
|
|
|
# note: partition 255 will only have 2 replicas
|
|
part_devs = sorted(rb.get_part_devices(255),
|
|
key=operator.itemgetter('id'))
|
|
self.assertEqual(part_devs, [rb.devs[0], rb.devs[1]])
|
|
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|