Displaying the rate of change of data, between two Snapshot copies

You can see the rate of change between two successive Snapshot copies in a volume. Data ONTAP displays the rates of change between successive Snapshot copies in a volume.

Step

1. To display data change rates on a volume, enter the following command:snap delta vol_name

   vol_name is the name of the volume containing the Snapshot copies.

   Note: You can display change rates for all volumes by omitting the volume name.

   Example

   The following table displays rates of change between successive Snapshot copies.

   system> snap delta vol0
   Volume vol0 working...
   From Snapshot To                 KB changed Time       Rate (KB/hour)
   ------------- ------------------ ---------- ---------- --------------
   hourly.0      Active File System 149812     0d 03:43   40223.985
   hourly.1      hourly.0           326232     0d 08:00   40779.000
   hourly.2      hourly.1           2336 1d    12:00      64.888
   hourly.3      hourly.2           1536 0d    04:00      384.000
   hourly.4      hourly.3           1420 0d    04:00      355.000
   nightly.0     hourly.4           1568 0d    12:00      130.666
   hourly.5      nightly.0          1400 0d    04:00      350.000
   nightly.1     hourly.5           10800 201d 21:00      2.229
   Summary...
   From Snapshot To                 KB changed Time       Rate (KB/hour)
   ------------- ------------------ ---------- ---------- --------------
   nightly.1     Active File System 495104     204d       20:43 100.697
   

• Displaying the rate of change of data, between a Snapshot copy and the active file system
  You can view the summary of the rate of change between the oldest Snapshot copy and the active file system. For details, see the na_snap(1) man page.