HP B6960-96035, Руководство по концепциям

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protection is set for 4 weeks, then significant growth of the IDB stops after 4 weeks.
Therefore, in this case, the IDB is 13 times larger if the catalog protection is set to
Permanent
.
It is recommended that catalog protection includes at least the last full backup. For
example, you can set a catalog protection of 8 weeks for full backups and one week
for incremental backups.
Use different logging levels in the same cell
A cell often consists of mail (or similar) servers that generate a large number of files
on a daily basis, database servers that store all information in a handful of files, and
some user workstations. Since the dynamics of these systems are rather different, it
is very difficult to prescribe one setting that suits them all. Therefore, it is recommended
to create several backup specifications with the following logging level settings:
• For mail servers, use the
Log Directories
option.
• For database servers, no logging is necessary as they have their own restore
policies. Therefore, use the
No Log
option.
• For workstations, the
Log All
or
Log Files
options allow for searching and
restoring different versions of files. For backups with the
Log Directories
or
No Log
options set, you can import catalogs from the media, which, in a
reasonably short time, allows the possibility to browse for the selected object. For
information on importing catalogs from media, see the online Help index:
“importing, catalogs from media“.
Different logging levels for object copies
Backed up objects and object copies or mirrors of these objects can have the same
or different logging levels. Depending on your backup policy, the selected logging
level of object copies can be more or less detailed than that of the source objects.
For example, you can specify the
No Log
option for object mirrors if you create
these mirrors just to ensure a successful completion of a backup session. Or, you can
specify the
No Log
option for a backup object to increase the backup performance,
and then specify the
Log All
option for this object in a subsequent object copy
session.
Specifics for small cells
If the number of files in a cell is small and will remain small (a million files or less)
and the systems in the cell perform usual business activities, you can always use the
Log All
option, which is the Data Protector default. However, you need to take
care of IDB growth and set a reasonable level of catalog protection.
The Data Protector internal database 202