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4 Posts
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3925
August 3rd, 2018 05:00
symcfg -sid xxx list -srp -efficiency output different between SE8.4 and SE9.0
hi all,
could someone explain why some ratio outputs are different?
same command on the same VMAX, but different SE version
thanks a lot
SE9.0
#symcfg -sid xxx list -srp -efficiency
STORAGE RESOURCE POOLS EFFICIENCY
Symmetrix ID : 000
--------------------------------------------------------------------------
Overall Data Reduction VP Snapshot
Name Ratio Ratio Enabled Ratio Ratio
-------------------------------- ------- ------- ------- -------- --------
SRP_1 11.3:1 2.5:1 100 1.5:1 22.7:1
SE8.4
#symcfg -sid xxx list -srp -efficiency
STORAGE RESOURCE POOLS
Symmetrix ID : 000
-----------------------------------------------------------------
Overall SRP Efficiency
VP Snapshot Comp Overall
Name Ratio Ratio Ratio Ratio
-------------------------------- ------- -------- ------ --------
SRP_1 1.5:1 22.7:1 2.8:1 12.7:1
PedalHarder
3 Apprentice
•
465 Posts
1
August 7th, 2018 16:00
The reason that SE 9.0 says data ration instead of compression ratio is because SE 9.0 support the Powermax arrays that can perform compression and deduplication. So the data ratio is a combination of compression and dedupe.
If you have a VMAX 250F for example, it only supports compression so the reporting in SE 9.0 will just be the compression calculation.
You can manually calculate the compression ratio if you really want to be sure the reporting is good. I posted a method for this here.
PedalHarder
3 Apprentice
•
465 Posts
1
August 6th, 2018 16:00
Per the SE V9.0 Release notes, there was a fix to the compression ratio reporting. This may be the cause of the difference.
yajtsav
4 Posts
0
August 7th, 2018 01:00
thanks a lot...so could we get the compression ratio in SE9.0 or should we stay with data ratio now?
yajtsav
4 Posts
0
August 8th, 2018 05:00
thanks