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Status Not under consideration
Workspace Storage Scale (formerly known as GPFS)
Created by Guest
Created on Apr 11, 2025

RELATED IDEAS

data tiering of block (ranges ) within a file

See this idea on ideas.ibm.com

A file needs to be able to be located partially on multiple storage TIERs, depending on various specific conditions like policy rules, selectable by ranges in Bytes or #blocks, rules for file names etc..
The goal is that data within one single file can be configured to have some blocks or regions in (a) higher data TIER(s) while the rest of the file's data can be stored or migrated to lower data tiers, such as HDD.

Many modern workloads in data intensive sciences and AI take advantage of enhance file formats such as HDF5 or NetCDF. Data in these formats is organized in truly hierarchical structure and so, it can be searched and accessed by applications much more efficient than searching the comparable amount of data via POSIX API from a file system directly.


By making sure, that the header of those files can be held in the fastest storage tier - performance of the overall system can be raised by some orders of magnitude. It will relieve the load to slower data tiers from IOPS driven meta data digging and provide high performance access to search the needed date from the application layer.

Idea priority High
  • Admin
    THOMAS O'BRIEN
    Reply
    |     Apr 18, 2025

    Thank you for submitting this enhancement request. This is not in the Storage Scale Roadmap in the foreseeable future

  • Guest
    Reply
    |     Apr 11, 2025

    Another advantage is the possibility to store the first x blocks of all
    files on a fast pool and the rest on slower pools. As a result, small
    files which have the most advantage from fast storage will be completely
    located on fast pools. This could currently also be achieved with policy
    rules but only with the additional overhead of data migration.

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