5e4127ae2a
Add's the configuration file option "dump_json" or command line options [-j|--dump-json] to have swift-dispersion-report output the report in json format. This allows the dispersion report to be more easily consumed elsewhere. There's also a few pep8 fixes and removal of unused imports. Change-Id: I2374311ccbef43e6bbae24665c9584e60f3da173
107 lines
3.3 KiB
Groff
107 lines
3.3 KiB
Groff
.\"
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.\" Author: Joao Marcelo Martins <marcelo.martins@rackspace.com> or <btorch@gmail.com>
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.\" Copyright (c) 2010-2011 OpenStack, LLC.
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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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.\"
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.TH swift-dispersion-report 1 "8/26/2011" "Linux" "OpenStack Swift"
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.SH NAME
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.LP
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.B swift-dispersion-report
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\- Openstack-swift dispersion report
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.SH SYNOPSIS
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.LP
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.B swift-dispersion-report [-j|--dump-json] [conf_file]
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.SH DESCRIPTION
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.PP
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This is one of the swift-dispersion utilities that is used to evaluate the
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overall cluster health. This is accomplished by checking if a set of
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deliberately distributed containers and objects are currently in their
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proper places within the cluster.
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.PP
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For instance, a common deployment has three replicas of each object.
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The health of that object can be measured by checking if each replica
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is in its proper place. If only 2 of the 3 is in place the object's health
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can be said to be at 66.66%, where 100% would be perfect.
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.PP
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Once the \fBswift-dispersion-populate\fR has been used to populate the
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dispersion account, one should run the \fBswift-dispersion-report\fR tool
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repeatedly for the life of the cluster, in order to check the health of each
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of these containers and objects.
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.PP
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These tools need direct access to the entire cluster and to the ring files.
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Installing them on a proxy server will probably do or a box used for swift
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administration purposes that also contains the common swift packages and ring.
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Both \fBswift-dispersion-populate\fR and \fBswift-dispersion-report\fR use the
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same configuration file, /etc/swift/dispersion.conf . The account used by these
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tool should be a dedicated account for the dispersion stats and also have admin
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privileges.
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.SH OPTIONS
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.RS 0
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.PD 1
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.IP "\fB-j, --dump-json\fR"
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output dispersion report in json format
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.SH CONFIGURATION
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.PD 0
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Example \fI/etc/swift/dispersion.conf\fR:
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.RS 3
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.IP "[dispersion]"
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.IP "auth_url = https://127.0.0.1:443/auth/v1.0"
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.IP "auth_user = dpstats:dpstats"
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.IP "auth_key = dpstats"
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.IP "swift_dir = /etc/swift"
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.IP "# dispersion_coverage = 1"
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.IP "# retries = 5"
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.IP "# concurrency = 25"
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.IP "# dump_json = no"
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.RE
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.PD
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.SH EXAMPLE
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.PP
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.PD 0
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$ swift-dispersion-report
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.RS 1
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.IP "Queried 2622 containers for dispersion reporting, 31s, 0 retries"
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.IP "100.00% of container copies found (7866 of 7866)"
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.IP "Sample represents 1.00% of the container partition space"
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.IP "Queried 2621 objects for dispersion reporting, 22s, 0 retries"
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.IP "100.00% of object copies found (7863 of 7863)"
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.IP "Sample represents 1.00% of the object partition space"
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.RE
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.PD
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.SH DOCUMENTATION
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.LP
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More in depth documentation about the swift-dispersion utilities and
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also Openstack-Swift as a whole can be found at
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.BI http://swift.openstack.org/admin_guide.html#cluster-health
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and
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.BI http://swift.openstack.org
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.SH "SEE ALSO"
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.BR swift-dispersion-populate(1),
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.BR dispersion.conf (5)
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