[Gluster-users] why i have a good write iops and poor read iops with more stripes?

[肖力]

Hi ,I have 4 dell 2970 server , three server  harddisk is 146Gx6 ,one hard disk is 72Gx6:I Want to test different stripe iops, and i test result is :----------------------------------------------------------------------no stripe gluster volume create test-volume   transport tcp \
172.16.20.231:/exp2  \
172.16.20.232:/exp2 \
172.16.20.233:/exp2  \

4k 100 % random write  288
4k 100 % random read  264----------------------------------------------------------------------2 stripegluster volume create test-volume   transport tcp \
172.16.20.231:/exp2  \
172.16.20.232:/exp2 \
172.16.20.233:/exp2  \


4k 100 % random write  439
4k 100 % random read  241
----------------------------------------------------------------------
6 stripe
gluster volume create test-volume3 stripe 6 transport tcp \
172.16.20.231:/exp5 172.16.20.231:/exp6 \
172.16.20.232:/exp5 172.16.20.232:/exp6 \
172.16.20.233:/exp5 172.16.20.233:/exp6 \


4k 100 % random write  683

4k 100 % random read  151
----------------------------------------------------------------------
My question is why more stripes more write good iops and more poor read iops?
thks
xiao li
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