"op_w_latency":
"avgcount": 42991,
"sum": 402.804741329
402.0/42991
0.009350794352306296
~9ms latency, that means this ssd not suitable for journal device?
"osd": {
"op_wip": 0,
"op": 58683,
"op_in_bytes": 7309042294,
"op_out_bytes": 507137488,
"op_latency": {
"avgcount": 58683,
"sum": 484.302231121
},
"op_process_latency": {
"avgcount": 58683,
"sum": 323.332046552
},
"op_r": 902,
"op_r_out_bytes": 507137488,
"op_r_latency": {
"avgcount": 902,
"sum": 0.793759596
},
"op_r_process_latency": {
"avgcount": 902,
"sum": 0.619918138
},
"op_w": 42991,
"op_w_in_bytes": 7092142080,
"op_w_rlat": {
"avgcount": 38738,
"sum": 334.643717526
},
"op_w_latency": {
"avgcount": 42991,
"sum": 402.804741329
},
"op_w_process_latency": {
"avgcount": 42991,
"sum": 260.489972416
},
...
2016-02-12 15:56 GMT+08:00 Irek Fasikhov <malm...@gmail.com>:
> Hi.
> You need to read :
> https://www.sebastien-han.fr/blog/2014/10/10/ceph-how-to-test-if-your-ssd-is-suitable-as-a-journal-device/
>
> С уважением, Фасихов Ирек Нургаязович
> Моб.: +79229045757
>
> 2016-02-12 10:41 GMT+03:00 Huan Zhang <huan.zhang...@gmail.com>:
>
>> 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
>>
>> _______________________________________________
>> ceph-users mailing list
>> ceph-users@lists.ceph.com
>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>>
>>
>
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