> Le 14 sept. 2025 à 10:15, Eugen Block <[email protected]> a écrit : > > Wasn't the default for bluestore_min_alloc_size changed between N and P from > 64k to 4k? That could also play a role when you had to rebuild your OSDs. And > wasn't there also a Bluestore tombstone cleanup introduced? I don't know when > exactly that was, but all these things could play a role, in addition to what > the others wrote, especially the relatively small SSD OSDs could play a > bigger role as Anthony already suggested. So it won't be easy to pinpoint the > root cause, there are too many factors involved, unless you have captured > logs and some additional terminal output during the rebuild like 'ceph osd > df', or how big the PGs on the SSDs are and how exactly you rebuilt the OSDs. > A lot of questions…
Yes indeed. Good questions…. Don’t have the answer. But it gives me maybe some clues to dig in. Olivier
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