swift-object-updater - OpenStack Swift object updater
/usr/lib/swift/swift-object-updater [CONFIG] [-h|--help] [-v|--verbose] [-o|--once]
swift-object-updater(1) OpenStack Swift swift-object-updater(1)
NAME
swift-object-updater - OpenStack Swift object updater
SYNOPSIS
/usr/lib/swift/swift-object-updater [CONFIG] [-h|--help] [-v|--verbose]
[-o|--once]
DESCRIPTION
The object updater is responsible for updating object information in
container listings. It will check to see if there are any locally
queued updates on the filesystem of each devices, what is also known as
async pending file(s), walk each one and update the container listing.
For example, suppose a container server is under load and a new object
is put into the system. The object will be immediately available for
reads as soon as the proxy server responds to the client with success.
However, the object server has not been able to update the object list-
ing in the container server. Therefore, the update would be queued
locally for a later update. Container listings, therefore, may not
immediately contain the object. This is where an eventual consistency
window will most likely come in to play.
In practice, the consistency window is only as large as the frequency
at which the updater runs and may not even be noticed as the proxy
server will route listing requests to the first container server which
responds. The server under load may not be the one that serves subse-
quent listing requests - one of the other two replicas may handle the
listing.
The options are as follows:
-v
--verbose
log to console
-o
--once
only run one pass of daemon
The object updater should be enabled and disabled using the Solaris
Service Management Facility, smf(7). The service FMRI for the object
updater is:
svc:/application/openstack/swift/swift-object-updater
DOCUMENTATION
More in depth documentation in regards to swift-object-updater and also
about OpenStack Swift as a whole can be found at http://swift.open-
stack.org/index.html
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+-----------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+-----------------------+
|Availability | cloud/openstack/swift |
+---------------+-----------------------+
|Stability | Uncommitted |
+---------------+-----------------------+
SEE ALSO
object-server.conf(4), smf(7)
NOTES
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from https://tarballs.open-
stack.org/swift/swift-2.7.0.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-object-updater(1)