IBM System Storage Ideas Portal


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Status Delivered
Workspace IBM Spectrum Virtualize / FlashSystem
Created by Guest
Created on Jun 21, 2018

RELATED IDEAS

Increase bitmap limit for features in Storwize/Spectrum Virtualize

Particularly in the Storwize family of products, the current ~512MiB of bitmap space is insufficient given the size of storage systems. Even a "small" V7000 system, for instance, may have several PiBs of disk. The default settings perform a volume format, which uses mirroring bitmap space during the format. Performing an initial bringup when it may be desired to present the full capacity of the system at once, such as behind an SVC, the amount of memory available requires creating volumes in chunks, even when making all available bitmap space available to mirroring. This can significantly increase deployment time.

Idea priority High
  • Guest
    Reply
    |     Sep 23, 2021

    Delivered in 8.4.2 (3Q21)

  • Guest
    Reply
    |     Jun 8, 2020

    Please add GEICO to the list of clients requiring this enhancement. Contact me (tmkane@us.ibm.com) for details

  • Guest
    Reply
    |     May 13, 2020

    This is even more serious after the latest launch of the new 38.4TB FCM 2.0, when a FS9200 is filled up and configured on Hyperswap, its only possible to mirror around 850TB of space, because of bitmap space.
    So extend the bitmap, please !!!

  • Guest
    Reply
    |     Nov 21, 2018

    This is also true for stretched clusters. The current bitmap space for volume mirroring only allows 2PB of volume copies per IO Group which is far too low for current storage sizes. Please increase.

  • Guest
    Reply
    |     Sep 26, 2018

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - Servers and Systems Software
    Product family - Storage
    Product - IBM System Storage SAN Volume Controller (SVC) / Spectrum Virtualize
    Component - Product functionality
    Operating system - Other
    Source - Storage Technical Client Council

    For recording keeping, the previous attributes were:
    Brand - Servers and Systems Software
    Product family - Storage
    Product - Storage TCC - Private Requests
    Component - Other
    Operating system - Other
    Source - Storage Technical Client Council

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