How the POOLUPCT variable is derived in Vantage

Products

• Vantage Storage Resource Manager

Issue/Introduction

Even if Vantage alerts were active to write to the system log when pool usage passes certain thresholds, it happened that a pool was full in that no new allocations could be made but SAMS was reporting 81%. The other 19% was on volumes that were marked with a status of DISABLE/NEW.

Does SAMS include these DISABLE/NEW volumes in its calculations of POOLUPCT or not? 

 

Environment

Release : All

Resolution

By default, Vantage STC is configured to show in POOLS object data for storage groups regardless the SMS status of the volumes defined to particular storage groups, i.e. DISNEW volume is counted the same way as ENABLE volume.

It is possible to change the manner of how Vantage intercepts volumes in different SMS statuses in Vantage POOLS object by setting the POOLTOTX Vantage system parameter.

POOLTOTX
SMS volumes have one of the following statuses: ENABLE, DISALL, DISNEW, QUIALL, QUINEW, or NOTCON.
The default value (N), means that no SMS volume defined to a Storage Group is excluded based upon its SMS Status. That is, all volumes defined to a storage group are included in its pool totals.
Specify (Y) to exclude all SMS volumes with a status of DISALL, DISNEW, QUIALL, QUINEW, or NOTCON. That is, pool totals will include only the ENABLED volumes.
Specify (Q) to exclude all SMS volumes with a status of DISALL, DISNEW, or NOTCON. That is, pool totals will include only the volumes with a status of ENABLE, QUIALL, or QUINEW.
The setting of POOLTOTX does not affect user-defined pools until USERTOTX is set to (Y).
Applies to: GMI and Storage Groups
Default: (N)

Also to underline that  (POOLS) Storage Groups object does have column %Allo All Vols (POOLPAL):

% Allo All Vols   

Percent allocated calculated based on all volumes defined for the   Storage Group. This field ignore the setting of Sysparm POOLTOTX and will include all volumes.

the %Allo column (POOLUPCT column) values are affected by POOLTOTX setting and when POOLTOTX (N), the POOLUPCT = POOLPAL.

Based on that, setting POOLTOTX(Y), the SAMS alert will bump from 81% up to 100%.