Hi! I've been working on this for quite some time now and I think it's ready for some broader testing and feedback.
https://github.com/TheJJ/ceph-balancer It's an alternative standalone balancer implementation, optimizing for equal OSD storage utilization and PG placement across all pools. It doesn't change your cluster in any way, it just prints the commands you can run to apply the PG movements. Please play around with it :) Quickstart example: generate 10 PG movements on hdd to stdout ./placementoptimizer.py -v balance --max-pg-moves 10 --only-crushclass hdd | tee /tmp/balance-upmaps When there's remapped pgs (e.g. by applying the above upmaps), you can inspect progress with: ./placementoptimizer.py showremapped ./placementoptimizer.py showremapped --by-osd And you can get a nice Pool and OSD usage overview: ./placementoptimizer.py show --osds --per-pool-count --sort-utilization Of course there's many more features and optimizations to be added, but it served us very well in reclaiming terrabytes of until then unavailable storage already where the `mgr balancer` could no longer optimize. What do you think? Cheers -- Jonas _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-le...@ceph.io
