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Status Delivered
Workspace AIX
Created by Guest
Created on Dec 10, 2020

RELATED IDEAS

filesystem shrinking with multiple threads

The current shrinkfs functionality of AIX does not scale well and only uses one thread for moving data during a shrink. Since during the work of shrinkfs the filesystem is quiesced to avoid conflicts with new I/O, this can cause applications to block for a very long time and cause some to eventually fail due to time delays in I/O. The only remedy that has been suggested is to shrink in small amounts multiple times. This works for some environments, but for others the only remedy is to do shrink during down times or having to do extra work on the weekends when activity is low. So we would like an option for chfs to do shrinking with multiple threads which would be a performance enhancement.

Idea priority Medium
  • Guest
    Reply
    |     Dec 11, 2020

    shrinkfs improvements are delivered in AIX 7.2 TL 5. Improved shrinkfs functionality minimizes the amount of time the filesystem is quiesced. Also added a progress indicator to the shrinkfs command output.

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