Irek, have you change the ceph.conf file to change the recovery p riority?
Options like these might help with prioritising repair/rebuild io with the client IO: osd_recovery_max_chunk = 8388608 osd_recovery_op_priority = 2 osd_max_backfills = 1 osd_recovery_max_active = 1 osd_recovery_threads = 1 Andrei ----- Original Message ----- From: "Irek Fasikhov" <malm...@gmail.com> To: ceph-users@lists.ceph.com Sent: Thursday, 11 September, 2014 1:07:06 PM Subject: [ceph-users] Rebalancing slow I/O. Hi,All. DELL R720X8,96 OSDs, Network 2x10Gbit LACP. When one of the nodes crashes, I get very slow I / O operations on virtual machines. A cluster map by default. [ceph@ceph08 ~]$ ceph osd tree # id weight type name up/down reweight -1 262.1 root defaults -2 32.76 host ceph01 0 2.73 osd.0 up 1 ........................... 11 2.73 osd.11 up 1 -3 32.76 host ceph02 13 2.73 osd.13 up 1 .............................. 12 2.73 osd.12 up 1 -4 32.76 host ceph03 24 2.73 osd.24 up 1 ............................ 35 2.73 osd.35 up 1 -5 32.76 host ceph04 37 2.73 osd.37 up 1 ............................. 47 2.73 osd.47 up 1 -6 32.76 host ceph05 48 2.73 osd.48 up 1 ............................... 59 2.73 osd.59 up 1 -7 32.76 host ceph06 60 2.73 osd.60 down 0 ............................... 71 2.73 osd.71 down 0 -8 32.76 host ceph07 72 2.73 osd.72 up 1 ................................ 83 2.73 osd.83 up 1 -9 32.76 host ceph08 84 2.73 osd.84 up 1 ................................ 95 2.73 osd.95 up 1 If I change the cluster map on the following: root---| | |-----rack1 | | | host ceph01 | host ceph02 | host ceph03 | host ceph04 | |-------rack2 | host ceph05 host ceph06 host ceph07 host ceph08 What will povidenie cluster failover one node? And how much will it affect the performance? Thank you -- С уважением, Фасихов Ирек Нургаязович Моб.: +79229045757 _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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