AIX HA - AIX Cluster, AIX Failover & Mirroring

By: Double-take Software  09-12-2011
Keywords: Centralized Backup

Continuous real-time replication coupled with automatic failover capabilities for disaster recovery, high availability, and centralized backup on IBM Power Systems servers running AIX give you 24/7 protection for business critical applications. Highly optimized replication processes continuously capture byte-level changes as they occur and replicate those changes to another local or remote AIX server.

Double-Take Availability for AIX uses data taps that reside below the Logical Volume Manager layer (LVM) to capture disk-writes on the production server. This allows the solution to transparently and reliably protect that data by shipping changes to the recovery server running another copy of Double-Take Availability for AIX. On the recovery server, Double-Take Availability for AIX simply applies these changes.

Double-Take Availability for AIX performs two types of recoveries. One type of recovery involves a roll back in time which takes place in the protected volumes on the Production Server. The other type of restore is a rollback in time which is executed over a read-writable virtual image of the protected volumes which reside on the Recovery Server.

Production restores are useful for a database “crash” where the database will not come up. By recovering an image of the actual production database to some point in the past directly on the production disk itself, Double-Take Availability for AIX can rollback a crashed database in minutes rather than hours or days for the most disastrous operational situation a database can encounter.

In contrast, a virtual restore is useful for database repair. In this case, an image of the database is rolled back to some point in the past on the snapshot which resides on the Recovery Server. Select pieces of the data can then be extracted and copied into the production database.

Keywords: Centralized Backup

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