Le vendredi 04 mai 2018 à 00:25 -0700, Tracy Reed a écrit : > On Fri, May 04, 2018 at 12:18:15AM PDT, Tracy Reed spake thusly: > > https://jcftang.github.io/2012/09/06/going-from-replicating-across- > > osds-to-replicating-across-hosts-in-a-ceph-cluster/ > > <snip> > > How can I tell which way mine is configured? I could post the whole > > crushmap if necessary but it's a bit large to copy and paste. > > To further answer my own question (sorry for the spam) the above > linked > doc says this should do what I want: > > step chooseleaf firstn 0 type host > > which is what I already have in my crush map. So it looks like the > default is as I want it. In which case I wonder why I had the problem > previously... I guess the only way to know for sure is to stop one > osd > node and see what happens.
You can test the crush rules. See http://docs.ceph.com/docs/master/rados/operations/crush-map-edits/ Examples from my own notes: ceph osd getcrushmap -o crushmap crushtool -i crushmap --test --rule 0 --num-rep 4 --show-utilization crushtool -i crushmap --test --rule 0 --num-rep 4 --show-mappings --show-choose-tries --show-statistics | less etc. This helped me validate the placement on different hosts and datacenters. -- Nicolas Huillard _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
