HP StoreAll Storage - Manual (Page 101)

NOTE:
Run-once can also be used to replicate a single software snapshot. This must be done on the GUI.
Remote cluster or intracluster replications
You can replicate to a remote cluster or the same cluster (an intracluster replication).
Remote cluster. Configure either continuous or run-once replication.
When configuring replication to a remote cluster, you must first configure a target export that
enables the source cluster to replicate to the appropriate file system and directory on the remote
cluster. See
“Configuring the target export for replication to a remote cluster” (page 102) .
Intracluster. 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
Many-to-many or many-to-one replications
You can set up multiple replication tasks at once, each with a source/target replication pair. The
tasks can be many-to-many or many-to-one replications.
Many-to-many replications
In many-to-many replications, each file system on the source cluster is replicated to a different file
system on the remote target cluster. Note the following:
•
Several replication tasks can run in parallel.
•
Each replication is either a continuous or a run-once task.
Many-to-one replications
Many-to-one replications can be configured as follows:
•
From multiple source clusters to different file systems on the same remote target cluster.
•
From multiple source clusters to different exported directories of the same target cluster and
exported file system.
Note the following:
•
Several replication tasks can run in parallel.
•
Each replication is either a continuous or a run-once task.
•
The target exported directories must not overlap. For example, if source cluster 1 is replicating
to <fs_root>dir1, source cluster 2 can replicate to <fs_root>dir2, but it cannot also
replicate to <fs_root>dir1/dir2.
Overview 101