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8-10 SANRAD V-Switch CLI User Manual
Active Snapshot
volume create –activate snapshot
You need four parameters to create an active snapshot volume:
SWITCH PARAMETER DEFINITION STATUS EXAMPLE
-vol
VOLUME SNAPSHOT NAME MANDATORY
Snapshot1
-src
SOURCE SOURCE OF
SNAPSHOT
MANDATORY
QATesting
-ch
CHILD SNAPSHOT CHILD MANDATORY
Snapshot1
-lt
LOAD THRESHOLD PERCENTAGE FULL
AT DESTINATION
TO TRIGGER AN
ALARM
OPTIONAL
DEFAULT: 80%
75
Inactive Snapshot
volume create snapshot
You need four parameters to create an inactive snapshot volume:
SWITCH PARAMETER DEFINITION STATUS EXAMPLE
-vol
VOLUME SNAPSHOT NAME MANDATORY
Snapshot1
-src
SOURCE SOURCE OF
SNAPSHOT
MANDATORY
QATesting
-ch
CHILD SNAPSHOT CHILD MANDATORY
Snapshot1
-lt
LOAD THRESHOLD PERCENTAGE FULL
AT DESTINATION
TO TRIGGER AN
ALARM
OPTIONAL
DEFAULT: 80%
75
Example:
Figure 8-6 shows a source volume with its first snapshot when the snapshot is
first created. Initially, a snapshot is empty because there has not yet been a
change in its source volume. Only when a write operation is performed on the
source volume will the snapshot begin to fill up. The pointer table for the
snapshot would point to the source volume for all sectors.