3.7.0 HP StorageWorks HP Scalable NAS File Serving Software administration guide - HP Scalable NAS 3.7 for Linux (AG513-96002, October 2009)

and to maintain communication among the nodes in the source cluster and synchronize
replication intervals.
The rplwatch process watches the PSFS filesystems and directories that are included
in the replication set specified in the configuration file. (There is a separate instance
of the process for each directory.) For each replication interval, rplwatch verifies
that the filesystem is mounted and then creates log files noting any files that have
been added, changed, or deleted during the interval. The process also starts worker
threads to perform the data transfer at the end of each replication interval.
When replication has finished an interval, it immediately begins monitoring file
changes for the next interval. Under normal circumstances, replication is always
running; there is no quiescent period between intervals.
The rplcontrol utility controls the replication state by sending commands (such
as start or stop commands) to the cluster or to individual nodes. You can use this
utility if necessary to stop or restart replication.
See the HP Scalable NAS File Serving Software command reference guide for more
information about the replication programs.
Manage replication operations
IMPORTANT:
All replication set source directories must be mounted on every node that is running
replication.
This section describes how to perform the following tasks:
• Check the replication state
• Determine when replication is complete
• Start or stop replication
• Restore replicated files
• Start or stop replication
• Modify the replication configuration
• End the current replication interval and start a new interval
• Reelect the sentinel node
• Create a custom ssh key pair
HP Scalable NAS File Serving Software administration guide 261