Hi,
I have made a test ceph cluster of 6 OSD's and 03 MON. I am testing the read write performance for the test cluster and the read IOPS is poor.
When I individually test it for each HDD, I get good performance, whereas, when I test it for ceph cluster, it is poor.
Between nodes, using iperf, I get good bandwidth.
My cluster info :
root@ceph-node3:~# ceph --version
ceph version 9.0.2-752-g64d37b7 (64d37b70a687eb63edf69a91196bb124651da210)
root@ceph-node3:~# ceph -s
cluster 9654468b-5c78-44b9-9711-4a7c4455c480
health HEALTH_OK
monmap e9: 3 mons at {ceph-node10=192.168.1.210:6789/0,ceph-node17=192.168.1.217:6789/0,ceph-node3=192.168.1.203:6789/0}
election epoch 442, quorum 0,1,2 ceph-node3,ceph-node10,ceph-node17
osdmap e1850: 6 osds: 6 up, 6 in
pgmap v17400: 256 pgs, 2 pools, 9274 MB data, 2330 objects
9624 MB used, 5384 GB / 5394 GB avail
256 active+clean
I have mapped an RBD block device to client machine (Ubuntu 14) and from there, when I run tests using FIO, i get good write IOPS, however, read is poor comparatively.
Write IOPS : 44618 approx
Read IOPS : 7356 approx
Pool replica - single
pool 1 'test1' replicated size 1 min_size 1
I have implemented rbd_readahead in my ceph conf file also.
Any suggestions in this regard with help me..
Thanks.
Daleep Singh Bais
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