Hi Stefan, Which balancer mode are you using? crush-compat scores using a mix of nobjects, npgs, and size. It's doing pretty well over here as long as you have a relatively small number of empty PGs. I believe that upmap uses nPGs only, and I haven't tested it enough yet to know if it actually improves things. Also, did you only run one iteration of the balancer? It only moves up to 5% of objects each iteration, so it can take several to fully balance things. -- dan On Wed, Feb 28, 2018 at 1:47 PM, Stefan Priebe - Profihost AG <s.priebe@xxxxxxxxxxxx> wrote: > Hello, > > with jewel we always used the python crush optimizer which gave us a > pretty good distribution fo the used space. > > Since luminous we're using the included ceph mgr balancer but the > distribution is far from perfect and much worse than the old method. > > Is there any way to tune the mgr balancer? > > Currently after a balance we still have: > 75% to 92% disk usage which is pretty unfair > > Greets, > Stefan > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
