On Wed, Mar 01, 2023 at 03:09:57PM +0100, Michal Suchanek wrote: > Some users complain that due to filesystem performance of writing the > clock.txt generating UUIDs is slow. XFS right? ;-) > uuidd would solve this but some distributions do not run it by default. For some performance critical use-cases you will see this issue with uuidd too. The latest changes in the libuuid and uuidd solves this problem by continuous-clock where uuidd uses dedicated clock sequence range to avoid often state-file updates. Numbers from Michael (author of the patch) The classic setup delivered <430.000 uuid/sec on average. The cont-clock setup delivered >6.800.000 uuid/sec on average. I hope we will have -rc1 with this change this week. Note that generate large number of time-based UUIDs without uuidd does not make sense. Karel -- Karel Zak <kzak@xxxxxxxxxx> http://karelzak.blogspot.com