New subject: [ceph-users] Reef release candidate - v18.1.2

30 Jun 2023

Hi everyone,

This is the second release candidate for Reef.

The Reef release comes with a new RockDB version (7.9.2) [0], which
incorporates several performance improvements and features. Our
internal testing doesn't show any side effects from the new version,
but we are very eager to hear community feedback on it. This is the
first release to have the ability to tune RockDB settings per column
family [1], which allows for more granular tunings to be applied to
different kinds of data stored in RocksDB. A new set of settings has
been used in Reef to optimize performance for most kinds of workloads
with a slight penalty in some cases, outweighed by large improvements
in use cases such as RGW, in terms of compactions and write
amplification. We would highly encourage community members to give
these a try against their performance benchmarks and use cases. The
detailed list of changes in terms of RockDB and BlueStore can be found
in https://pad.ceph.com/p/reef-rc-relnotes.

If any of our community members would like to help us with performance
investigations or regression testing of the Reef release candidate,
please feel free to provide feedback via email or in
https://pad.ceph.com/p/reef_scale_testing. For more active
discussions, please use the #ceph-at-scale slack channel in
ceph-storage.slack.com.

This RC has gone thru partial testing due to issues we are
experiencing in the sepia lab.
Please try it out and report any issues you encounter. Happy testing!

Thanks,
YuriW