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A comment on Scripts for Btrfs Maintenance. Parent comment

Re:Scripts for Btrfs Maintenance by jraph on Wednesday June 07, 2023 @04:59AM (#36224516)
It deduplicates everything. Don't defrag Btrfs lightly, unless you have a specific issue to solve and you ran out off other solutions. Even then, only do it if you know what you are doing.
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Re:Scripts for Btrfs Maintenance by the8472 on Wednesday June 07, 2023 @05:34AM (#36224748)
*reduplicates

Anyway, deduplication can be recovered after a defrag by running duperemove or similar tools. But it's a lot of added work so it's only really worth it if fragmentation is an issue in the first place.

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Re:Scripts for Btrfs Maintenance by Dylan16807 on Thursday June 08, 2023 @03:31PM (#36247435)
And you have to cross your fingers and hope it picks the defragmented copy, as far as I know.

It's also very slow to go through that on multiple snapshots.

And I think some of the metadata doesn't like to recombine?

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