Dell PowerVault 720N, Command Reference Manual, Page: 112 / 606

3-16 Dell PowerVault 720N, 740N, and 760N System Administrator and Command Reference Guide
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File statistics help you determine when to schedule snapshots by enabling you to see
when most file activity takes place on a volume. Using the
filestats
command
also helps you determine snapshot disk consumption.
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Enter the
filestats
command with the
ages
option to display a daily breakdown of
file changes in a volume, as shown in the following example:
filestats ages 1D,2D,3D,4D,5D,6D,7D,8D,9D,10D,11D,12D,
13D,14D volume vol0 snapshot hourly.0
‡
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.
‡
Divide the amount of disk space you want to reserve for snapshots 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 snapshots, divide 40 by 3 to determine the number of daily snapshots