Use the up or down arrow to select the number of snapshots to
keep. When that number is reached, the next snapshot causes the
oldest to be deleted. If the number of mirrors configured for the
snapshots is less than this value, the number of mirrors determines
how many snapshots are kept.
As more snapshots are retained, more data becomes available for
rapid recovery from disk (as well as more disk space that the
snapshots consume). The best setting depends on how often the
primary file system changes, and the number of snapshots being
created (how often the policy is activated).
This option is one of two for determining when Instant Recovery
snapshots are deleted. The other option is backup retention level,
which is set in the dialog box.
Refer to the NetBackup Snapshot Client
Administrator's Guide for more information on the backup
retention period for the Instant Recovery feature.
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