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Status Not under consideration
Workspace Storage Scale (formerly known as GPFS)
Created by Guest
Created on Jun 13, 2017

RELATED IDEAS

GPFS needs better contol over NSD IOs for mixed devices SSD + SATA

For a cluster that has a mix of SSD and SATA drives for different storage pools the current architecture queues IO to small (64K) and large queues. For the cluster I was examining we saw SSD IOs being blocked by slow SATA IOs on the NSD server for upto 6 seconds. I believe this is a limitation of our current NSD server design, we have two NSD queue divided based on IO size which allowed slow device to limit our over all IO thru put. This issue will probably come up more often as more customers start using a mix of SSD and traditional spinning disks.

Idea priority High
  • Guest
    Reply
    |     Sep 30, 2020

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - Servers and Systems Software
    Product family - IBM Spectrum Scale
    Product - Spectrum Scale (formerly known as GPFS) - Public RFEs
    Component - Product functionality

    For recording keeping, the previous attributes were:
    Brand - Servers and Systems Software
    Product family - IBM Spectrum Scale
    Product - Spectrum Scale (formerly known as GPFS) - Public RFEs
    Component - V4 Product functionality

  • Guest
    Reply
    |     Aug 28, 2017

    Felipe Knop & Steve Xaio are aware of this pmr issue.

  • Guest
    Reply
    |     Aug 28, 2017

    Can you provide more specific details of the configuration in use here? e.g. number of storage pools, what's in each pool... thx

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