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)