Guess you should multiply 27 by bs=4k?
Jason
2014-08-29 15:52 GMT+08:00 lixue...@chinacloud.com.cn
lixue...@chinacloud.com.cn:
guys:
There's a ceph cluster working and nodes were connected with 10Gb
cable. We defined fio's bs=4k and the object size of rbd is 4MB.
Client node was
Yes, as Jason suggests - 27 IOPS doing 4k blocks is:
27*4/1024 MB/s = 0.1 MB/s
While the RBD volume is composed of 4MB objects - many of the
(presumably) random IOs of 4k blocks can reside in the same 4MB object,
so it is tricky to estimate how many 4MB objects are needing to be
rewritten
guys:
There's a ceph cluster working and nodes were connected with 10Gb cable.
We defined fio's bs=4k and the object size of rbd is 4MB.
Client node was connect with the cluster via 1000Mb cable. Finally the IOPS is
27 ,when we control the latency of fio under 20ms. 4MB*27=108MB nearly
