HP D2D D2D NAS Integration with NetBackup (EH985-90936, March 2011) - Page 19

D2D Best Practices Guide

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space is not pre-allocated so there is no concern about lost disk space. NetBackup will automatically create new fragments as required. This parameter can be left at default. If the On demand only checkbox is set, only backup policies that are specifically assigned to this storage unit can use it. If this option is set and policies do not specify a storage unit, they will not run, so take care. The High and Low water mark are parameters used by NetBackup to determine when to release disk space occupied by expired backup policies. Once the high water mark is reached expired policies will be deleted until none remain or the low water mark is reached. Deleting expired backup will cause housekeeping overhead and this needs to be monitored (from the D2D Web Management Interface) to ensure it is within sensible limits. Housekeeping should normally not be increasing week on week. See the D2D Best Practices Guide for more information about monitoring housekeeping. 3. Click OK to save the configuration settings. To configure storage devices 19

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space is not pre-allocated so there is no concern about lost disk space. NetBackup will
automatically create new fragments as required. This parameter can be left at default.
If the
On demand only
checkbox is set, only backup policies that are specifically assigned to
this storage unit can use it. If this option is set and policies do not specify a storage unit, they
will not run, so take care.
The
High
and
Low water mark
are parameters used by NetBackup to determine when to
release disk space occupied by expired backup policies. Once the high water mark is reached
expired policies will be deleted until none remain or the low water mark is reached. Deleting
expired backup will cause housekeeping overhead and this needs to be monitored (from the
D2D Web Management Interface) to ensure it is within sensible limits. Housekeeping should
normally not be increasing week on week. See the
D2D Best Practices Guide
for more
information about monitoring housekeeping.
3.
Click
OK
to save the configuration settings.
To configure storage devices
19