baf3d2e372
This patch adds several guidelines:
* Global constants should be ALL_CAPS (cfg => CFG)
* Prefer single-quotes over double-quotes ("foo" => 'foo')
* Place a space before TODO in comments ("#TODO" => "# TODO")
Change-Id: Ib5b5c5916744856eca2ecaa37e949a3cdc4b3bd7
58 lines
1.9 KiB
Python
58 lines
1.9 KiB
Python
# Copyright (c) 2013 Rackspace Hosting, Inc.
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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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#
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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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"""MongoDB storage driver configuration options."""
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from marconi.common import config
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OPTIONS = {
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# Connection string
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'uri': None,
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# Database name
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# TODO(kgriffs): Consider local sharding across DBs to mitigate
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# per-DB locking latency.
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'database': 'marconi',
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# Maximum number of times to retry a failed operation. Currently
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# only used for retrying a message post.
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'max_attempts': 1000,
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# Maximum sleep interval between retries (actual sleep time
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# increases linearly according to number of attempts performed).
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'max_retry_sleep': 0.1,
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# Maximum jitter interval, to be added to the sleep interval, in
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# order to decrease probability that parallel requests will retry
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# at the same instant.
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'max_retry_jitter': 0.005,
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# Frequency of message garbage collections, in seconds
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'gc_interval': 5 * 60,
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# Threshold of number of expired messages to reach in a given
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# queue, before performing the GC. Useful for reducing frequent
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# locks on the DB for non-busy queues, or for worker queues
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# which process jobs quickly enough to keep the number of in-
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# flight messages low.
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#
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# Note: The higher this number, the larger the memory-mapped DB
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# files will be.
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'gc_threshold': 1000,
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}
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CFG = config.namespace('drivers:storage:mongodb').from_options(**OPTIONS)
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