> > iirc, chooseleaf goes down the tree and descents into multiple leafs > > to find what you are looking for. > > > > choose goes into that leaf and tries to find what you are looking for > > without going into subtrees. > > Right. To a first approximation, these rules are equivalent. The difference is > that the second won't handle the case where you have a host with many/all > OSDs tht are marked out (data will get shifted to the surviving OSD or you will get > no results), whereas the chooseleaf rule will handle things properly and maintain > a balanced distribution. So if I have 3 hosts, each runnunig 2 OSDs, pool size=3 What happens if I shut down one Host. choose => no redistribution to remaining host chooseleaf => data is copied to remaining OSDs Is that right? _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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