42f4b150e3
- Makes swift-dispersion-populate a bit faster when using a larger dispersion_coverage with a larger part_power. - Adds option to only run population for container OR objects - Adds option to let you resume population at given point (useful if you need to resume population after a previous run error'd out or the like) by specifying which suffix to start at. The original populate just randomly used uuid4().hex as a suffix on the container/object names until all the partition's required where covered. This isn't a big deal if you're only doing 1% coverage on a ring with a small part power but takes ages if you're doing 100% on a larger ring. Change-Id: I52f890a774412c1d6179f12db9081aedc58b6bc2
117 lines
3.8 KiB
Groff
117 lines
3.8 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 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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.\"
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.TH swift-dispersion-populate 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-populate
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\- Openstack-swift dispersion populate
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.SH SYNOPSIS
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.LP
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.B swift-dispersion-populate [--container-suffix-start] [--object-suffix-start] [--container-only|--object-only] [--insecure] [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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We need to place the containers and objects throughout the system so
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that they are on distinct partitions. The \fBswift-dispersion-populate\fR tool
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does this by making up random container and object names until they fall
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on distinct partitions. Last, and repeatedly for the life of the cluster,
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we need to run the \fBswift-dispersion-report\fR tool 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--insecure\fR"
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Allow accessing insecure keystone server. The keystone's certificate will not
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be verified.
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.IP "\fB--container-suffix-start=NUMBER\fR"
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Start container suffix at NUMBER and resume population at this point; default: 0
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.IP "\fB--object-suffix-start=NUMBER\fR"
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Start object suffix at NUMBER and resume population at this point; default: 0
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.IP "\fB--object-only\fR"
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Only run object population
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.IP "\fB--container-only\fR"
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Only run container population
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.IP "\fB--object-only\fR"
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Only run object population
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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 = 1.0"
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.IP "# retries = 5"
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.IP "# concurrency = 25"
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.IP "# endpoint_type = publicURL"
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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-populate
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.RS 1
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.IP "Created 2621 containers for dispersion reporting, 38s, 0 retries"
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.IP "Created 2621 objects for dispersion reporting, 27s, 0 retries"
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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-report(1),
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.BR dispersion.conf (5)
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