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Snapshots size shows 0KB or changes after creation in Data ONTAP 7-Mode

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Category:
data-ontap-8
Specialty:
7dot
Last Updated:

Applies to

  • Data ONTAP 8 operating in 7-Mode
  • Snapshots

Issue

System Manager shows snapshots with the size of 0 KB.

  • The same behavior can be observed when viewing snapshots from the command line:

node> snap list volume1
Volume volume1
working...
%/used %/total date name
---------- ---------- ------------ --------
0% ( 0%) 0% ( 0%) Oct 23 16:00 hourly.0 
0% ( 0%) 0% ( 0%) Oct 23 12:01 hourly.1 
0% ( 0%) 0% ( 0%) Oct 23 08:00 hourly.2 
0% ( 0%) 0% ( 0%) Oct 23 00:00 weekly.0 
0% ( 0%) 0% ( 0%) Oct 22 20:01 hourly.3 
0% ( 0%) 0% ( 0%) Oct 22 16:01 hourly.4 
0% ( 0%) 0% ( 0%) Oct 22 12:00 hourly.5 
0% ( 0%) 0% ( 0%) Oct 22 08:01 hourly.6 
0% ( 0%) 0% ( 0%) Oct 22 00:00 nightly.0 
0% ( 0%) 0% ( 0%) Oct 21 20:00 hourly.7 
0% ( 0%) 0% ( 0%) Oct 21 00:00 nightly.1 
0% ( 0%) 0% ( 0%) Oct 20 00:01 nightly.2 
0% ( 0%) 0% ( 0%) Oct 19 00:00 nightly.3 
0% ( 0%) 0% ( 0%) Oct 18 00:01 nightly.4 
0% ( 0%) 0% ( 0%) Oct 17 00:00 nightly.5 
0% ( 0%) 0% ( 0%) Oct 16 00:00 weekly.1

  • Snapshot size changes after creation.

Snapshot space usage can be checked by running the following commands:

The snap reclaimable command calculates the volume space that would be reclaimed if one or more specified Snapshots are deleted.

Note: This can be a long-running task as it is CPU intensive.    
node> snap reclaimable vol_name snapshot_name 

Snap delta displays the rate of change between snapshots. 
node> snap delta vol_name

Snap list displays a single line of information for each snapshot.

Along with the snapshot’s name, it shows when the snapshot was created and the size of the snapshot.
node> snap list vol_name

For snap command options, refer to the manual page

 

 

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