focal (1) swift-object-updater.1.gz

NAME

       swift-object-updater - OpenStack Swift object updater

SYNOPSIS

       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 listing 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 subsequent 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

DOCUMENTATION

       More  in depth documentation in regards to swift-object-updater and also about OpenStack Swift as a whole
       can be found at https://docs.openstack.org/swift/latest/

SEE ALSO

       object-server.conf(5)