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Game-changer for ZFS 2.2? Intelligent compression that saves CPU *and* space?

Apparently, an upcoming feature for ZFS is a complete re-imagining of how inline compression will be used.


Here is an example to summarize the gist of it:

  1. You configure a dataset to use ZSTD-9 compression
  2. Upon writing a new record, it first attempts to compress it entirely via LZ4 (ultra fast)
    • If the resulting compressed record does reduce in size by at least 12.5%, it compresses and saves it...

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