HP Application Recovery Manager software A.06.10 Concepts guide (March 2008)

6 Instant recovery and other
restore techniques from ZDB
sessions
Overview
With instant recovery, you restore complete replicas, at high speed, with minimum
impact on the application system. All volumes containing the data objects specified
in the backup specification are returned to their states at a specific point in time.
After a ZDB session, you can view the associated restore sessions in the Instant
Recovery GUI context.
Alternatively, you can use the Application Recovery Manager CLI.
Instant recovery
With instant recovery, lost or corrupt data is replaced with known good data, which
was previously replicated to other volumes on an array. This previously replicated
data is handled on the complete storage volume level. The remainder of the process
depends on the application being recovered:
• Where a filesystem has been replicated, this step is all that is required to return
the data to its state at the moment the replica was created.
• For a database application, you may need to perform additional operations to
fully recover the database after performing instant recovery, such as restoring
and applying transaction log files. In this way, you may be able to recover the
database to a later point in time than that at which the replica was created, if
log files for that time exist (commonly known as roll forward). This usually involves
the use of another backup medium or device if backup to tape using third–party
backup software was used. For more information, see the HP Application Recovery
Manager software integration guide.
Concepts guide 55