HP 3PAR Recovery Manager Software - Manual (Page 131)

11 Remote Copy for HP 3PAR Recovery Manager
Overview
HP 3PAR Remote Copy Software helps to safeguard against disasters that might occur at one
location by allowing you to keep copies of data on a separate server, which can be placed at a
remote location.
To maintain updated copies of data at a remote location, Remote Copy uses two HP 3PAR StoreServ
Storage Systems: a primary server (used for production) and a backup server which can be located
at a different site. Therefore, when disaster strikes in one location, there is always a backup of
data at the backup site.
HP 3PAR Recovery Manager automatically detects the Remote Copy mode in use (synchronous, ,
or asynchronous periodic) and creates virtual copies as appropriate for the configured mode.
For more information, see the HP 3PAR Remote Copy Software User’s Guide.
How Remote Copy Works
When data is synchronized between a production system (the Remote Copy primary system) on
one site and the backup server at another site, the systems involved perform the following steps in
sequence:
NOTE: For the HP 3PAR Recovery Manager GUI to manage virtual copies on the Remote Copy
backup server, you must register the mailbox server using the precise server name.
Synchronous Mode Remote Copy
•
HP 3PAR Recovery Manager leverages the VSS framework to freeze the I/O at the application
level.
•
For synchronous mode Remote Copy, the HP 3PAR VSS Provider creates a virtual copy of the
storage groups and log volumes.
•
At the same time on the remote backup site, the Remote Copy backup server takes a snapshot
of the secondary volumes.
•
The Remote Copy backup server saves the virtual copy in its repository at the remote site, and
the local backup server saves a local copy of the virtual copy.
NOTE: Running HP 3PAR Recovery Manager with synchronous mode Remote Copy requires HP
3PAR VSS Provider Software 2.2 or later.
Asynchronous Periodic Mode Remote Copy
•
HP 3PAR Recovery Manager leverages the VSS framework to freeze the I/O at the application
level.
•
For asynchronous periodic mode Remote Copy, the HP 3PAR VSS Provider creates a virtual
copy of the mailbox database/storage group and log volumes.
•
Remote Copy synchronizes the data on the primary server with the data on the bactrkup server
(thus updating the backup server).
•
After synchronization is complete, Remote Copy creates a virtual copy (snapshot) on the
backup server.
•
The backup server saves the virtual copy in its repository at the remote site.
•
For asynchronous periodic mode Remote Copy, HP 3PAR Recovery Manager removes the
virtual copy entry from its primary backup server repository and virtual copies created at the
primary StoreServ will be retained.
Overview 131