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! BTRFS Hints

Attentions

  • 2021-03: Never ever let BTRFS to be out of space. Balande data chunks regulary to always make space for growing metadatas (snapshots)
  • 2021-03: Do not use quota groups (it is not stable)
  • 2021-03: Do not use BTRFS with HDDs with bfq scheduler. Performance accesing metadata is very poor and can hause system lockups.

Hints

  • Default node size for mkfs.btrfs is 16kB and offers best performance. If file is small enough to be stored in btrfs leaf metadata it is directly stored in metadatas (max file size if 16384-148 heaf header)