Examples of the filestats command with ages option specified

You can use the filestats command with the ages option to display a daily breakdown of file changes in a volume.

The following example shows sample output from the filestats command with the ages option.

toaster> filestats ages 1D,2D,3D,4D,5D,6D,7D,8D,9D,10D,11D,12D,13D,14D volume vol0 snapshot hourly.0
VOL=vol0 SNAPSHOT=hourly.0
INODES=1087338 COUNTED_INODES=7062 TOTAL_BYTES=3835561873 TOTAL_KB=3701388

FILE SIZE           CUMULATIVE COUNT    CUMULATIVE TOTAL KB
1K                  2313                8428
10K                 6057                30280
100K                6686                49148
1M                  6949                167664
10M                 7008                406648
100M                7053                1538644
1G                  7062                3701388
MAX                 7062                3701388

AGE(ATIME)          CUMULATIVE COUNT    CUMULATIVE TOTAL KB
1D                  12                  332
2D                  20                  364
3D                  26                  18016
4D                  44                  18208
5D                  84                  64984
6D                  85                  64984
7D                  116                 65308
8D                  142                 67552
9D                  143                 71620
10D                 143                 71620
11D                 144                 71624
12D                 166                 93216
13D                 166                 93216
14D                 378                 109712
MAX                 7062                3701388

You use the daily age breakdown displayed in the Cumulative Total KB column of the Age output to determine the average change in data per day.
You divide the amount of disk space you want to reserve for Snapshot copies by the daily change average. For example, if you find that the average daily change rate is 3 GB and you have a 200-GB volume, 40 GB (or 20 percent) of which you want to reserve for Snapshot copies, divide 40 by 3 to determine the number of daily Snapshot copies you can have before exceeding your space limit. In this example, 13 daily Snapshot copies is your limit.

To display files with ages under 900 seconds (15 minutes), under 4 hours, and under 7 days, you use the following command: filestats ages 900,4H,7D volume vol0 snapshot hourly.1

The following example shows the age section of the output:

AGE(ATIME)       CUMULATIVE COUNT       CUMULATIVE TOTAL KB
900              0                      0
4H               0                      0
7D               785                    21568
MAX              882                    146000

Parent topic: Getting a file statistics summary