Name Type Description Mandatory Default
protected_
snapshot_
priority
Integer Specifies a
snapshot delete
priority between 0
- 4; snapshots with
a lower delete
priority (i.e.,
higher number)
than the specified
value might be
deleted by the
system
automatically to
free space, before
pausing mirroring,
thus protecting
snapshots with a
priority equal or
higher than the
value. If for
example the value
is set to 3, the
system will
deactivate
mirroring if not
enough space can
be freed even after
the deletion of
snapshots with
delete priority 4.
Snapshots with
priority level 1, 2
and 3 will not be
deleted. If the
value is set to 4,
the system will
deactivate
mirroring before
deleting any
snapshots. If the
value is set to 0,
the system can
delete any
snapshot
regardless of
deletion priority.
N unchanged
This command changes the Storage Pool snapshot limitation policy.
The create_last_consistent_snapshot attribute (used for systems which have no space):
v If the value of the attribute is "no", no last consistent snapshot is generated.
v If value is changed while synchronizing, the existing snapshot is not deleted.
The protected_snapshot_priority attribute:
v Snapshots with a lower delete priority (i.e., higher number) than the specified
value might be deleted by the system automatically, in order to free space,
before pausing the mirroring, thus protecting snapshots with a priority equal or
higher than the value.
v If, for example, the value is set to 3:
– The system will deactivate mirroring if not enough space can be freed even
after the deletion of snapshots with deletion priority of 4.
122 IBM XIV Storage System User Manual
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