Hi,
ceph VERY SLOW with 24 osd(SAMSUNG ssd).
fio /dev/rbd0 iodepth=1 direct=1 IOPS only ~200
fio /dev/rbd0 iodepth=32 direct=1 IOPS only ~3000
But test single ssd deive with fio:
fio iodepth=1 direct=1 IOPS ~15000
fio iodepth=32 direct=1 IOPS ~30000
Why ceph SO SLOW? Could you give me some help?
Appreciated!
My Enviroment:
[root@szcrh-controller ~]# ceph -s
cluster eb26a8b9-e937-4e56-a273-7166ffaa832e
health HEALTH_WARN
1 mons down, quorum 0,1,2,3,4 ceph01,ceph02,ceph03,ceph04,ceph05
monmap e1: 6 mons at {ceph01=
10.10.204.144:6789/0,ceph02=10.10.204.145:6789/0,ceph03=10.10.204.146:6789/0,ceph04=10.10.204.147:6789/0,ceph05=10.10.204.148:6789/0,ceph06=0.0.0.0:0/5
}
election epoch 6, quorum 0,1,2,3,4
ceph01,ceph02,ceph03,ceph04,ceph05
osdmap e114: 24 osds: 24 up, 24 in
flags sortbitwise
pgmap v2213: 1864 pgs, 3 pools, 49181 MB data, 4485 objects
144 GB used, 42638 GB / 42782 GB avail
1864 active+clean
[root@ceph03 ~]# lsscsi
[0:0:6:0] disk ATA SAMSUNG MZ7KM1T9 003Q /dev/sda
[0:0:7:0] disk ATA SAMSUNG MZ7KM1T9 003Q /dev/sdb
[0:0:8:0] disk ATA SAMSUNG MZ7KM1T9 003Q /dev/sdc
[0:0:9:0] disk ATA SAMSUNG MZ7KM1T9 003Q /dev/sdd
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