This is the command swift-dispersion-report that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
swift-dispersion-report - Openstack-swift dispersion report
SYNOPSIS
swift-dispersion-report [-d|--debug] [-j|--dump-json] [-p|--partitions] [--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.
Once the swift-dispersion-populate has been used to populate the dispersion account, one
should run the swift-dispersion-report tool repeatedly for the life of the cluster, in
order 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-dispersion-report 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.
OPTIONS
-d, --debug
output any 404 responses to standard error
OPTIONS
-j, --dump-json
output dispersion report in json format
OPTIONS
-p, --partitions
output the partition numbers that have any missing replicas
OPTIONS
--container-only
Only run the container report
OPTIONS
--object-only
Only run the object report
OPTIONS
--insecure
Allow accessing insecure keystone server. The keystone's certificate will not be
verified.
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
# project_name = dpstats
# project_domain_name = default
# user_domain_name = default
# dispersion_coverage = 1.0
# retries = 5
# concurrency = 25
# dump_json = no
# endpoint_type = publicURL
EXAMPLE
$ swift-dispersion-report
Queried 2622 containers for dispersion reporting, 31s, 0 retries
100.00% of container copies found (7866 of 7866)
Sample represents 1.00% of the container partition space
Queried 2621 objects for dispersion reporting, 22s, 0 retries
100.00% of object copies found (7863 of 7863)
Sample represents 1.00% of the object partition space
DOCUMENTATION
More in depth documentation about the swift-dispersion utilities and also Openstack-Swift
as a whole can be found at http://swift.openstack.org/admin_guide.html#cluster-health and
http://swift.openstack.org
Use swift-dispersion-report online using onworks.net services
