Also found the other problem is: the ceph osd directory has millions small files which will cause performance issue
1008 => # pwd /var/lib/ceph/osd/ceph-8/current 1007 => # ls |wc -l 21451 发件人： ceph-users<mailto:ceph-users-boun...@lists.ceph.com> 发送时间： 2014-10-31 08:23 收件人： ceph-users<mailto:ceph-users@lists.ceph.com> 主题： [ceph-users] half performace with keyvalue backend in 0.87 Dear Ceph, I used keyvalue backend in 0.80.6 and 0.80.7, the average speed with rsync millions small files is 10M byte /second when i upgrade to 0.87(giant), the speed slow down to 5M byte /second, I don't why , is there any tunning option for this? will superblock cause those performance slow down?
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