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Status Delivered
Workspace IBM Storage Archive
Created by Guest
Created on Jun 10, 2021

RELATED IDEAS

Increase speed of eeadm tape export on large file systems

The automotive supplier ZF uses Spectrum Archive EE in multiple installations as DR solution, as migration destination and to move data around the world (export / import). On the main site, they run a >30Pbyte file system for ADAS development and other HPC like applications like AI training and analyze.

When exporting a tape, they are faced with two major issues:
- when a tape reconcile is running, the tape export will be declined
- the reconcile started by the tape export runs >3 hours per export,the runtime increases with increasing the number of objects in the file system
- we created another file system for exports only, but the reconcile runs against all file systems in the cluster

ZF needs a faster export tape, one export must run reliable in less than one hour.

Possible ways to make this possible:
- hidden option "--do-not-reconcile" for eeadm tape export
- option to reconcile against a specific file system during eeadm tape export
- bring new options to eeadm tape export with a file list to move this files to the tape and export it - without the typical premigration and migration stuff
- or any other idea to make the export faster

Idea priority Urgent
  • Guest
    Reply
    |     Jul 7, 2021

    Targeting to deliver the --limit-filesystems option to "eeadm tape export" command so that internal reconcile operation will look for the stub files in subset of file systems.

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