Thanks for all the quick responses.  The available solutions are
 
a) Snapvault
 
b) Protection Manager
 
c) Scripting,  which I chose to do (using snapdrive):
 
        $SD snap create -hostvol $DB_DEVICE -snapname snap.0.tmp
 
        if [ $? -eq 1 ]
        then
                echo "Snapshot creation returned non-zero errorlevel!"
                exit 1
        fi
        $SD snap delete $SYSTEM:/vol/$NA_VOL:snap.$RETENTION

        while [ $RETENTION -gt 0 ]
        do
                ((TMP_RET=$RETENTION-1))
                $SD snap rename $SYSTEM:/vol/$NA_VOL:snap.$TMP_RET snap.$RETENTION 
                ((RETENTION=$RETENTION-1))
        done
        $SD snap rename $SYSTEM:/vol/$NA_VOL:snap.0.tmp snap.0
 
 
 
I would love if the filer's 'snap autodelete' could have the functionality in the future.
 
 
Daniel
 


From: Daniel Keisling
Sent: Tuesday, August 05, 2008 10:14 AM
To: 'toasters@mathworks.com'
Subject: Automatically delete snapshots based on number and not space availability

Greetings,
 
I take a daily snapshots (named ss-YYYYMMDDHHmm) of several volumes on my filers.  I would like to automatically delete the oldest snapshot (assuming it's not busy) when a certain number of snapshots are present in the volume (ie, only keep the latest 3 snapshots).  Is this possible?  If not, does anyone have any scripts where it can be done from a host?
 
TIA,

Daniel




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