v10.2.8 Jewel released


This point release brought a number of important bugfixes in all major components of Ceph. However, it also introduced a regression that could cause MDS damage, and a new release, v10.2.9, was published to address this. Therefore, Jewel users should not upgrade to this version - instead, we recommend upgrading directly to v10.2.9.

That being said, the v10.2.8 release notes do contain important information, so please read on.

For more detailed information, see the complete changelog.

OSD Removal Caveat

There was a bug introduced in Jewel (#19119) that broke the mapping behavior when an “out” OSD that still existed in the CRUSH map was removed with ‘osd rm’. This could result in ‘misdirected op’ and other errors. The bug is now fixed, but the fix itself introduces the same risk because the behavior may vary between clients and OSDs. To avoid problems, please ensure that all OSDs are removed from the CRUSH map before deleting them. That is, be sure to do:

ceph osd crush rm osd.123


ceph osd rm osd.123

Snap Trimmer Improvements

This release greatly improves control and throttling of the snap trimmer. It introduces the “osd max trimming pgs” option (defaulting to 2), which limits how many PGs on an OSD can be trimming snapshots at a time. And it restores the safe use of the “osd snap trim sleep” option, wihch defaults to 0 but otherwise adds the given number of seconds in delay between every dispatch of trim operations to the underlying system.

Other Notable Changes