Hi all ,
I am trying to find out some relation ( formula !!) . First , for sysstat ...
CPU NFS CIFS HTTP Total Net kB/s Disk kB/s Tape kB/s Cache Cache CP CP Disk FCP iSCSI FCP kB/s
in out read write read write age hit time ty util in out
32% 430 0 0 430 1923 128 348 972 0 0 32 100% 100% Bv 75% 0 0 0 0
20% 386 0 0 386 1725 116 256 612 0 0 32 100% 100% Bv 73% 0 0 0 0
Whats the relation between TOTAL IOPS and Disk KB/s (Read+write) , Above output is from a load testing with 4KB IO.. (1923+128/430= 4.76)
Secondly , How those relations can be related to invidual disk IOPS
Statit o/p
disk ut% xfers ureads--chain-usecs writes--chain-usecs cpreads-chain-usecs greads--chain-usecs gwrites-chain-usecs
/aggr4/plex0/rg0:
v5.26 15 6.37 0.09 1.00 365417 6.19 2.03 13595 0.09 4.35 5600 0.00 .... . 0.00 .... .
v5.27 16 6.57 0.09 1.00 450435 6.39 2.03 13724 0.09 3.68 6914 0.00 .... . 0.00 .... .
v5.28 19 8.10 1.21 1.00 52718 4.87 1.69 20546 2.03 2.65 8867 0.00 .... . 0.00 .... .
v5.29 14 5.76 1.18 1.00 49934 2.28 2.50 10604 2.31 2.21 12602 0.00 .... . 0.00 .... .
v5.32 14 5.76 1.18 1.00 51887 2.28 2.50 10646 2.31 2.22 12357 0.00 .... . 0.00 .... .
Note : v5.26 and v5.27 are parity disk .
From documeantation i can see that Xfers is "total number of disk ops" . Whats the relation (formula) between Xfers from statit o/p and Total IOPS from sysstat command ..
Thanks in advanced