I managed to export the rockdb, and compact. Just don't know how to put it back in - I guess "ceph-bluestore-tool prime-osd-dir" is the closest thing I can get to, but I can't specify what gets primed. :( To export Rocksdb from Bluestore: $ ceph bluestore-tool bluefs-export --path /var/lib/ceph/osd-0/ --out-dir /tmp/bluefs-export-ceph-osd-0 To compact: $ ceph-kvstore-tool rocksdb /tmp/bluefs-export-ceph-osd-0 compact Put it back into Bluestore somehow. Profit?? On Fri, Dec 20, 2019 at 11:18 AM Paul Choi <pchoi@nuro.ai> wrote:

Hi,

I have a weird situation where an OSD's rocksdb fails to compact, because the OSD became full and the osd-full-ratio was 1.0 (not a good idea, I know).

Hitting "bluefs enospc" while compacting: -376> 2019-12-18 15:48:16.492 7f2e0a5ac700 1 bluefs _allocate failed to allocate 0x40da486 on bdev 1, free 0x38b0000; fallback to bdev 2 -376> 2019-12-18 15:48:16.492 7f2e0a5ac700 -1 bluefs _allocate failed to allocate 0x on bdev 2, dne -376> 2019-12-18 15:48:16.492 7f2e0a5ac700 -1 bluefs _flush_range allocated: 0x0 offset: 0x0 length: 0x40da486 -376> 2019-12-18 15:48:16.500 7f2e0a5ac700 -1 /build/ceph-13.2.8/src/os/bluestore/BlueFS.cc: In function 'int BlueFS::_flush_range(BlueFS::FileWriter*, uin t64_t, uint64_t)' thread 7f2e0a5ac700 time 2019-12-18 15:48:16.499599 /build/ceph-13.2.8/src/os/bluestore/BlueFS.cc: 1704: FAILED assert(0 == "bluefs enospc")

So my idea is to copy out rocksdb somewhere else (bluefs-export), compact, then copy back in. Is there a way to do this? Mounting bluefs seems to be part of the OSD code, so there's no easy way to do this it seems.

Because the OSD died at 100% full, I can't do bluefs-bdev-expand, and repair/fsck fail too.

Thanks in advance.