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  • #3055
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Issue created Feb 17, 2021 by Loïc Dachary@dachary

Ceph and immutable & append only storage

The CEPH_OSD_ALLOC_HINT_FLAG_IMMUTABLE and CEPH_OSD_ALLOC_HINT_FLAG_APPEND_ONLY flags are set by rados bench via ALLOC_HINT_FLAG_IMMUTABLE and ALLOC_HINT_FLAG_APPEND_ONLY. It is used by BlueStore to decide on checksum and compression heuristics.

https://github.com/ceph/ceph/blob/3f5e778ad6f055296022e8edabf701b6958fb602/src/os/bluestore/BlueStore.cc#L14304-L14346


Migrated from T3055 (view on Phabricator)

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