IBM System Storage Ideas Portal


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Status Future consideration
Workspace IBM Spectrum Virtualize / FlashSystem
Created by Guest
Created on Jul 23, 2021

RELATED IDEAS

vdisk default caching IOgrp assignment

Hi,

While creating vdisk, Caching IOGRP assignment is automatic in a cluster containing more than 1 IOgrp. e.g. When vdisk is created on pool1 located on IOG1, its caching IOgrp by default should go to IOG1 maintaing local affinity in order to avoid inter node traffic for host IOs. Currently Caching IOgrp assignment algorithm is automatic which generally balances vdisks between IOgrp based on the number of vdisks assigned/cached to each IOgrp even if the vdisk isnt local to IOgrp to which its been assigned/cached which indirectly causes extra hop for Host IOs via internode traffic to IOgrp hosting the pool where vdisk is created. So the request in this is to change the current automatic assignment option to Affinity instead or add one more option Affinity in the dropdown for caching IOgrp along with automatic and let user choose which one he wants to keep default via global parameter so vdisk is always mapped to IOgrp on which the pool is hosted by default. User can choose different IOgrp manually if required anyways in the dropdown.

Thanks and Regards,

Idea priority High

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