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Performance analysis and monitoring for IBM SVC and Storwize

 


 


You want to know how good your Easy Tier works?  Nothing is easier than that.

With the favorite "Easy Tier Capacity Distribution", you can determine the efficiency of Easy Tier at a glance.

Start Favorite Easy Tier capacity & load distribution

This Favorite opens a dashboard with 2 performance views. The left Treemap shows the capacities and the right the performance of all managed disk groups with multiple tiers.
Yellow is flash storage and green is enterprise storage

The setup of the tree maps are

  • Left side capacity treemap
    Filter only shows managed disk groups with Easy Tier


  • Right side performance treemap
    Filter only shows managed disk groups with Easy Tier

 


Favorite Easy Tier capacity & load distribution. Yellow is flash storage and green is enterprise disk storage. On the left side we can see the capacity and on the right side we see the performance of the storage tiers.
We can see that the relative capacity of flash is small but the performance coverage of flash is great for managed disk group
V5A_900GB10KSAS.


Results provided by the Treemaps


Managed disk groups V5A_900GB10KSAS

  • Capacities - left side of the screen
    Enterprise capacity is 143.07 TiB
    Flash capacity is 6.15 TiB which are something like 4.3%

  • Performance  - Right side of the screen
    V5A_900GB10KSAS overall is 8888 IO7s
    Flash Tier is 6008,6 IO/s
    Enterprise Tier is 2879,8 IO/s

    Flash covers ~ 70% of the load which is good

Quick look at performance of V7A_600GB10KSAS

Look at the right screen to managed disk group V7A_600GB10KSAS
Here you find that the flash is only covering 50% of the load which is not as good as V5A_900GB10KSAS

The reason for this can be

    • relative flash capacity in this easy tier mdg is too small
    • Workload is not flash friendly because of  transfer sizes > 64KB

 

More information in there BVQ Library

 

Easy Tier: Using Performance view or Treemap to display tier level performance
Easy Tier: how to use the Performance view or the Treemap to display tier level storage performance
Easy Tier: Using Treemap to display tier level distribution
Easy Tier: how to use the Treemap to display tier level storage distribution per volume
Improve Easy Tier efficiency
Document shows the complete process to check and improve Easy Tier efficiency