BackPak H4.00 Catalog Sync Option

Disaster/Recovery Option Description
8 BackPak H4.00 Catalog Sync Option
High-level operations
For all BackPak personalities, the catalog replication operates the same way. The
replication over Expand is executed in two steps:
1. In the primary system, as soon as a tape volume written by a tape application is
unloaded, the related new catalog information is sent by automatic Export
processes to a staging area on the remote secondary system. Other important
events, such as the creation of tape volumes, initiate also Export processes.
2. In the secondary system, the BackPak and DSM/TC catalogs are updated from
the staging area by Import processes initiated manually through the BackPak
graphical user interface, or automatically by TACL commands scheduled in
NetBatch.
The staging area contains always all the catalog information required to re-
execute a full import and rebuild the BackPak and DSM/TC catalog entries.
Successive exports will rewrite the same export files. No cleanup of the staging
area is required even if no import is executed – although regular imports ensure
the good reconstruction of metadata before the site recovery event.
Figure 1. BackPak Catalog replication over Expand