Hi, all:
I have two small test on our cephfs cluster:
time for i in {1..10000}; do echo hello > file${i}; done && time rm * &&
time for i in {1..10000}; do echo hello > file${i}; done && time rm *
Client A : use kernel client
Client B : use fuse client
First I create folder “create_by_A" on Client A and do the test on
“create_by_A” with Client A
and create folder “create_by_B" on Client B and do the test on
““create_by_B” with Client B
result on A:
real 0m3.768s
user 0m0.236s
sys 0m0.244s
real 0m4.542s
user 0m0.068s
sys 0m0.228s
real 0m3.545s
user 0m0.200s
sys 0m0.256s
real 0m4.941s
user 0m0.024s
sys 0m0.264s
result on B:
real 0m16.768s
user 0m0.368s
sys 0m0.716s
real 0m27.542s
user 0m0.120s
sys 0m0.888s
real 0m15.990s
user 0m0.288s
sys 0m0.792s
real 0m20.904s
user 0m0.243s
sys 0m0.577s
It seem normal, but then
do the test on folder “create_by_A” with Client B
do the test on folder “create_by_B” with Client A
result on A:
real 0m3.832s
user 0m0.200s
sys 0m0.264s
real 0m8.326s
user 0m0.100s
sys 0m0.192s
real 0m5.934s
user 0m0.264s
sys 0m0.368s
real 0m4.117s
user 0m0.104s
sys 0m0.200s
result on B:
real 2m25.713s
user 0m0.592s
sys 0m1.120s
real 2m16.726s
user 0m0.084s
sys 0m1.228s
real 2m9.301s
user 0m0.440s
sys 0m1.104s
real 2m19.365s
user 0m0.200s
sys 0m1.184s
It seems very slow and strange
System Version : Ubuntu 14.04
kernel Version: 4.4.0-28-generic
ceph version: 10.2.2
ceph -s :
health HEALTH_WARN
noscrub,nodeep-scrub,sortbitwise flag(s) set
monmap e1: 3 mons at
{rndcl26=10.0.0.26:6789/0,rndcl38=10.0.0.38:6789/0,rndcl62=10.0.0.62:6789/0}
election epoch 40, quorum 0,1,2 rndcl26,rndcl38,rndcl62
fsmap e24091: 1/1/1 up {0=rndcl67=up:active}, 1 up:standby
osdmap e9202: 119 osds: 119 up, 119 in
flags noscrub,nodeep-scrub,sortbitwise
pgmap v11577714: 8256 pgs, 3 pools, 62234 GB data, 165 Mobjects
211 TB used, 221 TB / 432 TB avail
8256 active+clean
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