IBM System Storage Ideas Portal


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Status Not under consideration
Workspace IBM Spectrum Virtualize / FlashSystem
Created by Guest
Created on Jun 22, 2022

RELATED IDEAS

Flashsystem should use multiple CPU cores to process I/O per Volume instead of just one core per Volume

Layer 3 Communications (Customer) was experiencing low performance/high latency issues on their FlashSystem 5030 on a large Volume. IBM Support was engaged and the SME told them that this is because the FlashSystem is designed to utilize only one CPU core to process I/O per Volume. So the recommendation was to break up the large Volume into multiple smaller Volumes so performance will improve across the multiple Volumes. Customer wants IBM to change the design to allow multiple CPU cores to service I/O to a single large Volume, thus improving performance per Volume.

Idea priority High
  • Admin
    Philip Clark
    Reply
    |     Jan 20, 2023

    Most of the software stack is multi-threaded with good performance with large single-volume. However multiple volumes does allow better CPU and cache utilization and does not have any noticeable effect on failover times.

  • Admin
    Philip Clark
    Reply
    |     Sep 25, 2022

    Thank you for submitting this Idea. We are currently evaluating your request.

    Thanks,
    SpecV Team

    philipclark@ibm.com

  • Guest
    Reply
    |     Jun 22, 2022

    Good synopsis. While having multiple volumes allows for better utilization of CPU, multiple volumes diminish potential capacity and can lead to an issue where if a node failure occurs, systems with more than 6 volumes can experience greater degradation due to CPU restriction.

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