The client doesn't hit any bottleneck. I also tried to run multiple clients on different host. There's no change.
2014-10-17 14:36 GMT+08:00 Alexandre DERUMIER <aderumier@xxxxxxxxx>:
Hi,
>>Thanks for the detailed information. but I am already using fio with rbd engine. Almost 4 volumes can reach the peak.
What is your cpu usage of fio-rbd ?
Myself I'm cpu bound on 8cores with around 40000iops read 4K.
----- Mail original -----
De: "Mark Wu" <wudx05@xxxxxxxxx>
À: "Daniel Schwager" <Daniel.Schwager@xxxxxxxx>
Cc: ceph-users@xxxxxxxxxxxxxx
Envoyé: Jeudi 16 Octobre 2014 19:19:17
Objet: Re: Performance doesn't scale well on a full ssd cluster.
Thanks for the detailed information. but I am already using fio with rbd engine. Almost 4 volumes can reach the peak.
2014 年 10 月 17 日 上午 1:03于 wudx05@xxxxxxxxx 写道：
Thanks for the detailed information. but I am already using fio with rbd engine. Almost 4 volumes can reach the peak.
2014 年 10 月 17 日 上午 12:55于 "Daniel Schwager" < Daniel.Schwager@xxxxxxxx >写道：
<blockquote>
</blockquote>
Hi Mark,
maybe you will check rbd-enabled fio
http://telekomcloud.github.io/ceph/2014/02/26/ceph-performance-analysis_fio_rbd.html
yum install ceph-devel
git clone git:// git.kernel.dk/fio.git
cd fio ; ./configure ; make -j5 ; make install
Setup the number of jobs (==clients) inside fio config to
numjobs=8
for simulating multiple clients.
regards
Danny
my test.fio:
[global]
#logging
#write_iops_log=write_iops_log
#write_bw_log=write_bw_log
#write_lat_log=write_lat_log
ioengine=rbd
clientname=admin
pool=rbd
rbdname=myimage
invalidate=0 # mandatory
rw=randwrite
bs=1m
runtime=120
iodepth=8
numjobs=8
time_based
#direct=0
[seq-write]
stonewall
rw=write
#[seq-read]
#stonewall
#rw=read
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