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Chapter
11
Configuring off-host
processing
Off-host processing allows you to implement the following activities:
Data backup As the requirement for 24 x 7 availability becomes essential
for many businesses, organizations cannot afford the
downtime involved in backing up critical data offline. By
taking a snapshot of the data, and backing up from this
snapshot, business-critical applications can continue to run
without extended down time or impacted performance.
Decision support analysis
and reporting
Because snapshots hold a point-in-time copy of a
production database, a replica of the database can be set up
using the snapshots. Operations such as decision support
analysis and business reporting do not require access to up-
to-the-minute information. This means that they can use a
database copy that is running on a host other than the
primary. When required, the database copy can quickly be
synchronized with the data in the primary database.
Testing and training Development or service groups can use snapshots as test
data for new applications. Snapshot data provides
developers, system testers and QA groups with a realistic
basis for testing the robustness, integrity and performance
of new applications.
Database error recovery Logic errors caused by an administrator or an application
program can compromise the integrity of a database. By
restoring the database table files from a snapshot copy, the
database can be recovered more quickly than by full
restoration from tape or other backup media.