100 lines
3.2 KiB
Groff
100 lines
3.2 KiB
Groff
.\"
|
|
.\" Author: Joao Marcelo Martins <marcelo.martins@rackspace.com> or <btorch@gmail.com>
|
|
.\" Copyright (c) 2010-2011 OpenStack Foundation.
|
|
.\"
|
|
.\" Licensed under the Apache License, Version 2.0 (the "License");
|
|
.\" you may not use this file except in compliance with the License.
|
|
.\" You may obtain a copy of the License at
|
|
.\"
|
|
.\" http://www.apache.org/licenses/LICENSE-2.0
|
|
.\"
|
|
.\" Unless required by applicable law or agreed to in writing, software
|
|
.\" distributed under the License is distributed on an "AS IS" BASIS,
|
|
.\" WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
|
|
.\" implied.
|
|
.\" See the License for the specific language governing permissions and
|
|
.\" limitations under the License.
|
|
.\"
|
|
.TH swift-dispersion-populate 1 "8/26/2011" "Linux" "OpenStack Swift"
|
|
|
|
.SH NAME
|
|
.LP
|
|
.B swift-dispersion-populate
|
|
\- Openstack-swift dispersion populate
|
|
|
|
.SH SYNOPSIS
|
|
.LP
|
|
.B swift-dispersion-populate
|
|
|
|
.SH DESCRIPTION
|
|
.PP
|
|
This is one of the swift-dispersion utilities that is used to evaluate the
|
|
overall cluster health. This is accomplished by checking if a set of
|
|
deliberately distributed containers and objects are currently in their
|
|
proper places within the cluster.
|
|
|
|
.PP
|
|
For instance, a common deployment has three replicas of each object.
|
|
The health of that object can be measured by checking if each replica
|
|
is in its proper place. If only 2 of the 3 is in place the object's health
|
|
can be said to be at 66.66%, where 100% would be perfect.
|
|
|
|
.PP
|
|
We need to place the containers and objects throughout the system so
|
|
that they are on distinct partitions. The \fBswift-dispersion-populate\fR tool
|
|
does this by making up random container and object names until they fall
|
|
on distinct partitions. Last, and repeatedly for the life of the cluster,
|
|
we need to run the \fBswift-dispersion-report\fR tool to check the health of each
|
|
of these containers and objects.
|
|
|
|
.PP
|
|
These tools need direct access to the entire cluster and to the ring files.
|
|
Installing them on a proxy server will probably do or a box used for swift
|
|
administration purposes that also contains the common swift packages and ring.
|
|
Both \fBswift-dispersion-populate\fR and \fBswift-dispersion-report\fR use the
|
|
same configuration file, /etc/swift/dispersion.conf . The account used by these
|
|
tool should be a dedicated account for the dispersion stats and also have admin
|
|
privileges.
|
|
|
|
.SH CONFIGURATION
|
|
.PD 0
|
|
Example \fI/etc/swift/dispersion.conf\fR:
|
|
|
|
.RS 3
|
|
.IP "[dispersion]"
|
|
.IP "auth_url = https://127.0.0.1:443/auth/v1.0"
|
|
.IP "auth_user = dpstats:dpstats"
|
|
.IP "auth_key = dpstats"
|
|
.IP "swift_dir = /etc/swift"
|
|
.IP "# dispersion_coverage = 1"
|
|
.IP "# retries = 5"
|
|
.IP "# concurrency = 25"
|
|
.IP "# endpoint_type = publicURL"
|
|
.RE
|
|
.PD
|
|
|
|
.SH EXAMPLE
|
|
.PP
|
|
.PD 0
|
|
$ swift-dispersion-populate
|
|
.RS 1
|
|
.IP "Created 2621 containers for dispersion reporting, 38s, 0 retries"
|
|
.IP "Created 2621 objects for dispersion reporting, 27s, 0 retries"
|
|
.RE
|
|
|
|
.PD
|
|
|
|
|
|
.SH DOCUMENTATION
|
|
.LP
|
|
More in depth documentation about the swift-dispersion utilities and
|
|
also Openstack-Swift as a whole can be found at
|
|
.BI http://swift.openstack.org/admin_guide.html#cluster-health
|
|
and
|
|
.BI http://swift.openstack.org
|
|
|
|
|
|
.SH "SEE ALSO"
|
|
.BR swift-dispersion-report(1),
|
|
.BR dispersion.conf (5)
|