[root@localhost mongo]# fio -filename=/data/test -iodepth=64 -ioengine=libaio -direct=1 -rw=randread -bs=4k -size=2G -numjobs=64 -runtime=20 -group_reporting -name=test-rand-read
test-rand-read: (g=0): rw=randread, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=64
...
test-rand-read: (g=0): rw=randread, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=64
fio-2.0.13
Starting 64 processes
test-rand-read: Laying out IO file(s) (1 file(s) / 2048MB)
Jobs: 64 (f=64): [rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr] [100.0% done] [8576K/0K/0K /s] [2144 /0 /0 iops] [eta 00m:00s]
test-rand-read: (groupid=0, jobs=64): err= 0: pid=25586: Sun Jun 8 09:55:37 2014
read : io=165468KB, bw=8220.9KB/s, iops=2055 , runt= 20128msec
slat (usec): min=3 , max=2139.2K, avg=30433.71, stdev=237137.34
clat (msec): min=1 , max=2227 , avg=1870.79, stdev=438.59
lat (msec): min=1 , max=4175 , avg=1901.22, stdev=494.59
clat percentiles (msec):
| 1.00th=[ 40], 5.00th=[ 652], 10.00th=[ 1647], 20.00th=[ 1909],
| 30.00th=[ 1926], 40.00th=[ 1958], 50.00th=[ 1975], 60.00th=[ 1991],
| 70.00th=[ 2024], 80.00th=[ 2073], 90.00th=[ 2147], 95.00th=[ 2180],
| 99.00th=[ 2180], 99.50th=[ 2180], 99.90th=[ 2212], 99.95th=[ 2212],
| 99.99th=[ 2212]
bw (KB/s) : min= 1, max= 514, per=1.41%, avg=116.21, stdev=66.55
lat (msec) : 2=0.01%, 4=0.01%, 10=0.03%, 20=0.08%, 50=1.41%
lat (msec) : 100=0.53%, 250=1.09%, 500=1.14%, 750=1.37%, 1000=1.29%
lat (msec) : 2000=54.11%, >=2000=38.94%
cpu : usr=0.00%, sys=0.01%, ctx=3499, majf=1, minf=5853
IO depths : 1=0.2%, 2=0.3%, 4=0.6%, 8=1.2%, 16=2.5%, 32=5.0%, >=64=90.3%
submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
complete : 0=0.0%, 4=99.8%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.2%, >=64=0.0%
issued : total=r=41367/w=0/d=0, short=r=0/w=0/d=0
Run status group 0 (all jobs):
READ: io=165468KB, aggrb=8220KB/s, minb=8220KB/s, maxb=8220KB/s, mint=20128msec, maxt=20128msec
Disk stats (read/write):
xvde: ios=40950/851, merge=4/4946, ticks=2810110/41343, in_queue=2856117, util=99.50%
[root@localhost mongo]# fio -filename=/data/test -iodepth=64 -ioengine=libaio -direct=1 -rw=randread -bs=4k -size=2G -numjobs=64 -runtime=20 -group_reporting -name=test-rand-read
test-rand-read: (g=0): rw=randread, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=64
...
test-rand-read: (g=0): rw=randread, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=64
fio-2.0.13
Starting 64 processes
Jobs: 64 (f=64): [rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr] [100.0% done] [6972K/0K/0K /s] [1743 /0 /0 iops] [eta 00m:00s]
test-rand-read: (groupid=0, jobs=64): err= 0: pid=28848: Sun Jun 8 10:08:36 2014
read : io=125112KB, bw=6211.6KB/s, iops=1552 , runt= 20142msec
slat (usec): min=3 , max=3336.5K, avg=40244.43, stdev=314457.77
clat (msec): min=1 , max=3491 , avg=2420.11, stdev=713.74
lat (msec): min=1 , max=5880 , avg=2460.36, stdev=769.16
clat percentiles (msec):
| 1.00th=[ 35], 5.00th=[ 562], 10.00th=[ 1418], 20.00th=[ 2376],
| 30.00th=[ 2409], 40.00th=[ 2442], 50.00th=[ 2507], 60.00th=[ 2573],
| 70.00th=[ 2671], 80.00th=[ 2802], 90.00th=[ 3294], 95.00th=[ 3359],
| 99.00th=[ 3425], 99.50th=[ 3458], 99.90th=[ 3490], 99.95th=[ 3490],
| 99.99th=[ 3490]
bw (KB/s) : min= 1, max= 640, per=1.46%, avg=90.70, stdev=72.86
lat (msec) : 2=0.01%, 4=0.02%, 10=0.07%, 20=0.28%, 50=1.40%
lat (msec) : 100=0.58%, 250=1.02%, 500=1.40%, 750=1.16%, 1000=1.71%
lat (msec) : 2000=5.34%, >=2000=87.01%
cpu : usr=0.00%, sys=0.01%, ctx=2687, majf=0, minf=5921
IO depths : 1=0.2%, 2=0.4%, 4=0.8%, 8=1.6%, 16=3.3%, 32=6.5%, >=64=87.1%
submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
complete : 0=0.0%, 4=99.8%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.2%, >=64=0.0%
issued : total=r=31278/w=0/d=0, short=r=0/w=0/d=0
Run status group 0 (all jobs):
READ: io=125112KB, aggrb=6211KB/s, minb=6211KB/s, maxb=6211KB/s, mint=20142msec, maxt=20142msec
Disk stats (read/write):
xvde: ios=32110/343, merge=1/3411, ticks=2865683/815531, in_queue=3681977, util=99.50%
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