swift-dispersion-populate - OpenStack Swift dispersion populate
swift-dispersion-populate [--container-suffix-start] [--object-suffix- start] [--container-only|--object-only] [--insecure] [conf_file]
OpenStack Swift swift-dispersion-populate(1)
NAME
swift-dispersion-populate - OpenStack Swift dispersion populate
SYNOPSIS
swift-dispersion-populate [--container-suffix-start] [--object-suffix-
start] [--container-only|--object-only] [--insecure] [conf_file]
DESCRIPTION
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.
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.
We need to place the containers and objects throughout the system so
that they are on distinct partitions. The swift-dispersion-populate
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 swift-dispersion-report tool to check
the health of each of these containers and objects.
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 swift-dispersion-populate and swift-dis-
persion-report use the same configuration file, /etc/swift/disper-
sion.conf . The account used by these tool should be a dedicated
account for the dispersion stats and also have admin privileges.
OPTIONS
--insecure
Allow accessing insecure keystone server. The keystone's cer-
tificate will not be verified.
--container-suffix-start=NUMBER
Start container suffix at NUMBER and resume population at this
point; default: 0
--object-suffix-start=NUMBER
Start object suffix at NUMBER and resume population at this
point; default: 0
--object-only
Only run object population
--container-only
Only run container population
--object-only
Only run object population
--no-overlap
Increase coverage by amount in dispersion_coverage option with
no overlap of existing partitions (if run more than once)
CONFIGURATION
Example /etc/swift/dispersion.conf:
[dispersion]
auth_url = https://127.0.0.1:443/auth/v1.0
auth_user = dpstats:dpstats
auth_key = dpstats
swift_dir = /etc/swift
# dispersion_coverage = 1.0
# retries = 5
# concurrency = 25
# endpoint_type = publicURL
EXAMPLE
$ swift-dispersion-populate
Created 2621 containers for dispersion reporting, 38s, 0 retries
Created 2621 objects for dispersion reporting, 27s, 0 retries
DOCUMENTATION
More in depth documentation about the swift-dispersion utilities and
also OpenStack Swift as a whole can be found at http://swift.open-
stack.org/admin_guide.html#cluster-health and http://swift.open-
stack.org
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+---------------+-----------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+-----------------------+
|Availability | cloud/openstack/swift |
+---------------+-----------------------+
|Stability | Uncommitted |
+---------------+-----------------------+
SEE ALSO
swift-dispersion-report(1), dispersion.conf(4)
NOTES
This software was built from source available at
https://java.net/projects/solaris-userland. The original community
source was downloaded from http://launch-
pad.net/swift/kilo/2.3.0/+download/swift-2.3.0.tar.gz
Further information about this software can be found on the open source
community website at http://www.openstack.org/.
OpenStack 8/26/2011
swift-dispersion-populate(1)