IBM System Storage Ideas Portal
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Welcome to the IBM Ideas Portal (https://www.ibm.com/ideas) - Use this site to find out additional information and details about the IBM Ideas process and statuses.

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Status Not under consideration
Workspace IBM Spectrum Virtualize / FlashSystem
Created by Guest
Created on Jan 17, 2017

RELATED IDEAS

SVC stretched cluster learning Easy Tier heatmap on secondf copy of Vdisk mirror

See this idea on ideas.ibm.com

Easy Tier considers each pool separately, without knowledge about mirrored VDisks. In a stretched cluster with full site awareness and host failover cluster as application, the pool in the production site (where the host failover cluster lives most of the time) receives all read cache misses and all writes. The pool in the other site receives only the (mirrored) writes. Therefore, the IO patterns and the hot spots of the pools are different. In the production pool, the hot spots are determined by the combined read + write back-end IOs. In the other site, only the back-end writes build hot spots... this will generate performance problem when failorver on the second host who is located on the second site(the reads were never seen by Easy Tier in this pool)

Idea priority Urgent

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