Displaying Snapshot disk consumption statistics

The snap list command shows the amount of disk space consumed by Snapshot copies in a specified volume. This command enables you to see how much disk space each Snapshot copy is using and helps you determine an appropriate Snapshot reserve. The snap list command also shows whether a Snapshot copy is currently being used for backup and whether it is needed for a restartable dump or another backup application.

Step

1. To display the Snapshot statistics for a volume, enter the following command:snap list volume_name

   volume_name is the name of the volume for which you want statistics.

   Example

   Following is an example of the snap list command output. If you do not specify a volume name in the command, the output contains statistics about each volume in the system.

   systemA> snap list vol0
   
   Volume vol0
   %/used     %/total    date         name
   ---------- ---------- ------------ --------
   0% ( 0%)   0% ( 0%)   Jan 19 08:01 hourly.0
   1% ( 1%)   1% ( 1%)   Jan 19 00:01 nightly.0
   2% ( 2%)   2% ( 2%)   Jan 18 20:01 hourly.1
   3% ( 2%)   2% ( 2%)   Jan 18 16:01 hourly.2
   3% ( 2%)   3% ( 2%)   Jan 18 12:01 hourly.3
   5% ( 3%)   4% ( 3%)   Jan 18 00:01 nightly.1
   7% ( 4%)   6% ( 4%)   Jan 17 00:00 nightly.2
   8% ( 4%)   7% ( 4%)   Jan 16 00:01 nightly.3
   10%( 5%)   9% ( 4%)   Jan 15 00:01 nightly.4
   

• How the snap list output is calculated
  The snap list output is calculated in a number of ways.
• How to use cumulative Snapshot values
  If you want the amount of disk space consumed by all Snapshot copies to not exceed a certain percentage of the used disk space, use the cumulative values in the snap list output to determine which Snapshot copies to delete.
• Displaying Snapshot copy use and dependencies
  The snap list command displays the notation “busy” after the name of a Snapshot copy if the Snapshot copy is being actively used by an application.
• snap list performance after a snap restore file operation
  If you restore files with the snap restore command, and then issue the snap list command, the snap list command can take up to several minutes to complete.