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Linux 5.13 To Bring A Huge Speed-Up For MD RAID10 DISCARD Handling

Submitted by Roy Schestowitz on Friday 26th of March 2021 01:36:03 PM Filed under
Linux

For those running Linux MD RAID10 arrays you may have found the performance around discard requests such as when running MKFS and FSTRIM operations to be rather slow... Well, with Linux 5.13 it will be lightning fast.

For years there have been reports of slow DISCARD handling for RAID10 MD block devices under Linux...

[...]

This dramatic speed-up from 280 seconds to less than 1 second has now been queued into Linux-block's for-next branch ahead of the Linux 5.13 kernel from md-next. Thus barring any issues from coming up, this optimization will be found in Linux 5.13.

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