Comment 16 for bug 1415954

I have not seen reports about 'osd max backfills = 1' and 'osd recovery max active = 1' causing the rebalance never ended. Sure they may increase recovery time, still it looks like the problems caused by high load during recovery/rebalance much worse so these are commonly recommended settings. E.g. they were used in 47 disk servers/1128 OSDs ceph cluster at Cern:

http://www.slideshare.net/Inktank_Ceph/scaling-ceph-at-cern