6.1 HP IBRIX X9000 Network Storage System File System User Guide (TA768-96061, June 2012)

NOTE: If a different file system is used for the target, the linkage can go back to the original
cluster.
• To replicate a directory or snapshot on a file system covered by continuous replication, first
pause the continuous task and then initiate a run-once replication task.
For information about configuring intercluster replications, see “Configuring the target export for
replication to a remote cluster” (page 123).
Using intracluster replications
There are two forms of intracluster replication:
• The same cluster and a different file system. Configure either continuous or run-once replication.
You will need to specify a target file system and optionally a target directory (the default is
the root of the file system or the mount point).
• The same cluster and the same file system. Configure run-once replication. You will need to
specify a file system, a source directory, and a target directory. Be sure to specify two different,
non-overlapping subdirectories as the source and target. For example, the following replication
is not allowed:
From <fs_root>dir1 to <fs_root>dir1/dir2
However, the following replication is allowed:
From <fs_root>dir1 to <fs_root>dir3/dir4
File system snapshot replication
You can use the run-once replication mode to replicate a single file system snapshot. If a snapshot
replication is not explicitly configured, snapshots and all related metadata are ignored/filtered
out during remote replications. Replication is not supported for block snapshots.
Configuring the target export for replication to a remote cluster
Use the following procedure to configure a target export for remote replication. In this procedure,
target export refers to the target file system and directory (the default is root of the file system)
exported for remote replication.
NOTE: These steps are not required when configuring intracluster replication.
• Register source and destination clusters. The source and target clusters of a remote replication
configuration must be registered with each other before remote replication tasks can be
created.
• Create a target export. This step identifies the target file system and directory for replication
and associates it with the source cluster. Before replication can take place, you must create
a mapping between the source cluster and the target export that receives the replicated data.
This mapping ensures that only the specified source cluster can write to the target export.
• Identify server assignments to use for remote replication. Select the servers and corresponding
NICs to handle replication requests, or use the default assignments. The default server
assignment is to use all servers that have the file system mounted.
NOTE: Do not add or change files on the target system outside of a replication operation. Doing
this can prevent replication from working properly.
GUI procedure
This procedure must be run from the target cluster, and is not required or applicable for intracluster
replication.
Configuring the target export for replication to a remote cluster 123