HP Archive Backup System for OpenVMS Guide to Operations

Saving and Restoring Data
3.2 Catalogs
When a save request uses a DISKS type catalog, the following message is displayed in the
save request log file:
"Filenames will not be catalogued"
• FILES - The FILES type catalog stores all information about save requests performed and
all files saved. It allows individual file lookups and restores.
• SLS - The SLS type catalog is used only for the lookup of the files backed up by SLS. ABS
V4.0x and later versions do not adequately support the use of lookups and restoring of SLS
history files. ABS will only be able to restore the latest files that were backed up by SLS.
Note
For ABS to perform a lookup on the SLS History, the following conditions need to be
met:
1) Image SLS$SHR in the SYS$SHARE directory, and
2) the logical SLS$HIST_ for performing a lookup on the catalog of
SLS Type just as SLS does for the “STOR RESTORE command.
3.2.4 Directory
• VOLUME_SETS - The VOLUME_SETS type catalog stores all information like the FILES
type catalog. However, ABS uses individual files for each volume set. Catalog lookups take
slightly longer for VOLUME_SETS type catalogs compared to FILES type catalogs. But
VOLUME_SETS type catalogs avoid the constant growth of catalog files because the volume
set specific file is deleted once the volume set has been re-used. A VOLUME_SETS
type catalog cannot be used for DISK archive types.
Note
In ABS V4.4, the existing lookup on Volume_Set type of catalog is enhanced to use the
date qualifiers effectively. This has significantly reduced the lookup time and
improved the performance. However, if you still want to use the previous Lookup feature,
define the logical ABS_V40_LOOKUP System-wide. By default, this logical is not
set.
$ DEFINE/SYSTEM ABS_V40_LOOKUP 1
This user defined logical is specific to ABS version 4.4 and will be automatically
removed when ABS is uninstalled. In case you want to downgrade ABS, you need to
manually deassign this logical to free the space that it has occupied in the System table.
By default catalog files are created in ABS$CATALOG. Without modification ABS$CATALOG
points to ABS$ROOT:[CATALOG]. When creating a new catalog you can create the catalog
files in a different location by specifying a device and directory. You have to update the definition
of ABS$CATALOG logical in ABS$SYSTARTUP.COM to include the new device and
directory solution in form of a search list.
Example 3–1 Adding a New Catalog Location
$ CREATE/DIRECTORY DKA100:[ABS_CATALOG]
$ DEFINE/SYSTEM/EXECUTIVE ABS$CATALOG ABS$ROOT:[CATALOG],-
DKA100:[ABS_CATALOGS]
This creates a new directory for catalog files and adds it to the ABS$CATALOG search list. The
same definition needs to be set in ABS$SYSTARTUP.COM.
3-6 Saving and Restoring Data