I am trying to get a time for cache slots age. The reason being is I want to get a feel for how persistant readahead for sequential reads are.
Is there a symmcli command to poll this information ?
Try the following might not be 100% to what you are looking for (Solutions Enabler CLI command reference guide)
To display PREFETCH statistics about all back-end DA
directors in the specified Symmetrix array every 60
seconds 100 times, enter:
symstat -DA ALL -i 60 -c 100 -type prefetch -sid 8910
The following output is returned:
DIR Preftch Preftch Trk/sec
H:M Trk/sec Used Unused
A B C D
A Time of day.
B Number of prefetched tracks per second.
C Number of prefetched tracks used per second.
D Number of prefetched tracks superseded per second.