背景：新购一个dell R320服务器，有4个1T硬盘，原本是raid5,经人建议生产环境服务器最好raid10.会有更好的IO。
测试环境：raid5+centos+vmware esxi6.0
顺序读：
fio -filename=/dev/sdb1 -direct=1 -iodepth 1 -thread -rw=read -ioengine=psync -bs=16k -size=200G -numjobs=30 -runtime=1000 -group_reporting -name=mytest
随机写：
fio -filename=/dev/sdb1 -direct=1 -iodepth 1 -thread -rw=randwrite -ioengine=psync -bs=16k -size=200G -numjobs=30 -runtime=1000 -group_reporting -name=mytest
顺序写：
fio -filename=/dev/sdb1 -direct=1 -iodepth 1 -thread -rw=write -ioengine=psync -bs=16k -size=200G -numjobs=30 -runtime=1000 -group_reporting -name=mytest
混合随机读写：
fio -filename=/dev/sdb1 -direct=1 -iodepth 1 -thread -rw=randrw -rwmixread=70 -ioengine=psync -bs=16k -size=200G -numjobs=30 -runtime=100 -group_reporting -name=mytest -ioscheduler=noop
一般以iops400为基准去判断
使用fio-2.1.4进行测试
1.安装软件包
首先要安装libaio-devel
yum -y install libaio-devel
wget
tar -jxvf fio-2.1.4.tar.bz2
cd fio-2.1.4
make
make install
2.使用fio命令测试参数如下：
-filename=/dev/.. 需要测试的硬件类型
-direct=1 测试过程要过机器自带的buffer，使测试结果更加真实
-rw=read，write，randread，randwrite，rw，randrw 分别代表顺序读，顺序写，随机读，随机写，顺序读写，随机读写
-bs=xK 单次io的块文件大小为xK（x=4,8,16...)
-size= 本次测试文件大小
-numjobs= 本次的测试线程数
-runtime 测试时间
-group_reporting 显示结果
例子：在5G文件上测试4K顺序读：fio -filename=/dev/sda1 -direct=1 -rw=read -bs=4k -size=5G -numjobs=1 -runtime=60 -group_reporting -name=test
一、fio测试-raid5、centos环境下
filename=/dev/sdb1 测试文件名称，通常选择需要测试的盘的data目录。
direct=1 测试过程绕过机器自带的buffer。使测试结果更真实。
rw=randwrite 测试随机写的I/O
rw=randrw 测试随机写和读的I/O
bs=16k 单次io的块文件大小为16k
bsrange=512-2048 同上，提定数据块的大小范围
size=5g 本次的测试文件大小为5g，以每次4k的io进行测试。
numjobs=30 本次的测试线程为30.
runtime=1000 测试时间为1000秒，如果不写则一直将5g文件分4k每次写完为止。
ioengine=psync io引擎使用pync方式
rwmixwrite=30 在混合读写的模式下，写占30%
group_reporting 关于显示结果的，汇总每个进程的信息。
此外
lockmem=1g 只使用1g内存进行测试。
zero_buffers 用0初始化系统buffer。
nrfiles=8 每个进程生成文件的数量
1.1随机读
[root@localhost ~]# fio --filename=/dev/sda -direct=1 -iodepth 1 -thread -rw=randread -ioengine=psync -bs=16k -size=15G -numjobs=30 -runtime=100 -group_reporting -name=mytest
mytest: (g=0): rw=randread, bs=16K-16K/16K-16K, ioengine=psync, iodepth=1
...
mytest: (g=0): rw=randread, bs=16K-16K/16K-16K, ioengine=psync, iodepth=1
fio 2.0.7
Starting 30 threads
Jobs: 30 (f=30): [rrrrrrrrrrrrrrrrrrrrrrrrrrrrrr] [3.0% done] [21577K/0K /s]
.......................
[1Jobs: 30 (f=30): [rrrrrrrrrrrrrrrrrrrrrrrrrrrrrr] [100.0% done] [18004K/0K /s] [1098 /0 iops] [eta 00m:00s]
mytest: (groupid=0, jobs=30): err= 0: pid=24172
read : io=2133.3MB, bw=21773KB/s, iops=1360 , runt=100328msec（30个线程的数据）
read : io=2135.4MB, bw=21841KB/s, iops=1365 , runt=100113msec （100个线程的数据）
clat (usec): min=25 , max=466600 , avg=21979.32, stdev=31688.30
lat (usec): min=25 , max=466601 , avg=21979.54, stdev=31688.30
clat percentiles (usec):
| 1.00th=[ 49], 5.00th=[ 51], 10.00th=[ 53], 20.00th=[ 57],
| 30.00th=[ 65], 40.00th=[ 2704], 50.00th=[12864], 60.00th=[18560],
| 70.00th=[25984], 80.00th=[37632], 90.00th=[59136], 95.00th=[82432],
| 99.00th=[144384], 99.50th=[175104], 99.90th=[264192], 99.95th=[301056],
| 99.99th=[358400]
bw (KB/s) : min= 116, max= 1725, per=3.36%, avg=731.52, stdev=219.58
lat (usec) : 50=1.15%, 100=36.35%, 250=1.06%, 500=0.07%, 750=0.08%
lat (usec) : 1000=0.11%
lat (msec) : 2=0.65%, 4=2.10%, 10=4.50%, 20=16.36%, 50=24.23%
lat (msec) : 100=10.29%, 250=2.89%, 500=0.14%
cpu : usr=0.90%, sys=2.96%, ctx=4405913, majf=0, minf=14310
IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
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=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
issued : total=r=136530/w=0/d=0, short=r=0/w=0/d=0
Run status group 0 (all jobs):
READ: io=2133.3MB, aggrb=21773KB/s, minb=21773KB/s, maxb=21773KB/s, mint=100328msec, maxt=100328msec
Disk stats (read/write):
sda: ios=136528/17, merge=0/6, ticks=2997428/30574, in_queue=3056930, util=99.97%
1.2顺序读
[root@localhost ~]# fio --filename=/dev/sda -direct=1 -iodepth 1 -thread -rw=read -ioengine=psync -bs=16k -size=15G -numjobs=100 -runtime=100 -group_reporting -name=mytest
mytest: (g=0): rw=read, bs=16K-16K/16K-16K, ioengine=psync, iodepth=1
...
mytest: (g=0): rw=read, bs=16K-16K/16K-16K, ioengine=psync, iodepth=1
fio 2.0.7
Starting 100 threads
Jobs: 100 (f=100): [RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR] [3.0% done] [622.6M/0K /s] [37.1K/0
Jobs: 100 (f=100)[RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR] [100.0% done] [379.4M/0K /s] [23.2K/0 iops] [eta 00m:00s]
mytest: (groupid=0, jobs=100): err= 0: pid=24358
read : io=69433MB, bw=710954KB/s, iops=44434 , runt=100006msec
clat (usec): min=23 , max=249093 , avg=2248.42, stdev=3512.60
lat (usec): min=24 , max=249093 , avg=2248.65, stdev=3512.61
clat percentiles (usec):
| 1.00th=[ 131], 5.00th=[ 241], 10.00th=[ 338], 20.00th=[ 564],
| 30.00th=[ 812], 40.00th=[ 1080], 50.00th=[ 1432], 60.00th=[ 2064],
| 70.00th=[ 2704], 80.00th=[ 3376], 90.00th=[ 4384], 95.00th=[ 5536],
| 99.00th=[14144], 99.50th=[19840], 99.90th=[35584], 99.95th=[44800],
| 99.99th=[120320]
bw (KB/s) : min= 1129, max=34618, per=1.01%, avg=7145.69, stdev=5673.83
lat (usec) : 50=0.01%, 100=0.39%, 250=5.00%, 500=11.87%, 750=10.30%
lat (usec) : 1000=9.70%
lat (msec) : 2=21.87%, 4=27.76%, 10=11.43%, 20=1.17%, 50=0.46%
lat (msec) : 100=0.03%, 250=0.01%
cpu : usr=16.91%, sys=101.56%, ctx=444993679, majf=0, minf=67452
IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
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=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
issued : total=r=4443727/w=0/d=0, short=r=0/w=0/d=0
Run status group 0 (all jobs):
READ: io=69433MB, aggrb=710953KB/s, minb=710953KB/s, maxb=710953KB/s, mint=100006msec, maxt=100006msec
Disk stats (read/write):
sda: ios=4347944/6, merge=88587/1, ticks=8424368/4080, in_queue=8422876, util=100.00%
1.3随即写
[root@localhost ~]# fio --filename=/dev/sda -direct=1 -iodepth 1 -thread -rw=randwrite -ioengine=psync -bs=16k -size=15G -numjobs=100 -runtime=100 -group_reporting -name=mytest
mytest: (g=0): rw=randwrite, bs=16K-16K/16K-16K, ioengine=psync, iodepth=1
...
mytest: (g=0): rw=randwrite, bs=16K-16K/16K-16K, ioengine=psync, iodepth=1
fio 2.0.7
Starting 100 threads
mytest: (groupid=0, jobs=100): err= 0: pid=24469
write: io=44352KB, bw=425714 B/s, iops=25 , runt=106683msec
clat (msec): min=6 , max=8944 , avg=3709.18, stdev=2985.37
lat (msec): min=6 , max=8944 , avg=3709.18, stdev=2985.37
clat percentiles (msec):
| 1.00th=[ 174], 5.00th=[ 807], 10.00th=[ 1074], 20.00th=[ 1254],
| 30.00th=[ 1369], 40.00th=[ 1516], 50.00th=[ 1680], 60.00th=[ 2311],
| 70.00th=[ 7111], 80.00th=[ 7439], 90.00th=[ 7767], 95.00th=[ 8029],
| 99.00th=[ 8455], 99.50th=[ 8586], 99.90th=[ 8848], 99.95th=[ 8848],
| 99.99th=[ 8979]
bw (KB/s) : min= 1, max= 65, per=1.90%, avg= 7.89, stdev= 6.62
lat (msec) : 10=0.04%, 20=0.04%, 50=0.25%, 100=0.22%, 250=0.90%
lat (msec) : 500=2.53%, 750=0.72%, 1000=2.81%, 2000=50.04%, >=2000=42.46%
cpu : usr=0.20%, sys=0.16%, ctx=1349529, majf=0, minf=264474
IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
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=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
issued : total=r=0/w=2772/d=0, short=r=0/w=0/d=0
Run status group 0 (all jobs):
WRITE: io=44352KB, aggrb=415KB/s, minb=415KB/s, maxb=415KB/s, mint=106683msec, maxt=106683msec
Disk stats (read/write):
sda: ios=116/2780, merge=0/4, ticks=31176/10414622, in_queue=10465765, util=100.00%
1.4顺序写
[root@localhost ~]# fio --filename=/dev/sda -direct=1 -iodepth 1 -thread -rw=write -ioengine=psync -bs=16k -size=15G -numjobs=100 -runtime=100 -group_reporting -name=mytest
mytest: (g=0): rw=write, bs=16K-16K/16K-16K, ioengine=psync, iodepth=1
...
mytest: (g=0): rw=write, bs=16K-16K/16K-16K, ioengine=psync, iodepth=1
fio 2.0.7
Starting 100 threads
mytest: (groupid=0, jobs=100): err= 0: pid=24910
write: io=421120KB, bw=4191.5KB/s, iops=261 , runt=100481msec
clat (msec): min=17 , max=2494 , avg=381.06, stdev=224.75
lat (msec): min=17 , max=2494 , avg=381.06, stdev=224.75
clat percentiles (msec):
| 1.00th=[ 99], 5.00th=[ 126], 10.00th=[ 159], 20.00th=[ 208],
| 30.00th=[ 260], 40.00th=[ 302], 50.00th=[ 343], 60.00th=[ 400],
| 70.00th=[ 441], 80.00th=[ 490], 90.00th=[ 635], 95.00th=[ 799],
| 99.00th=[ 1188], 99.50th=[ 1483], 99.90th=[ 2114], 99.95th=[ 2278],
| 99.99th=[ 2343]
bw (KB/s) : min= 6, max= 222, per=1.07%, avg=44.84, stdev=21.21
lat (msec) : 20=0.01%, 50=0.01%, 100=1.21%, 250=27.36%, 500=53.17%
lat (msec) : 750=12.01%, 1000=4.40%, 2000=1.71%, >=2000=0.13%
cpu : usr=0.38%, sys=0.73%, ctx=3665740, majf=0, minf=66360
IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
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=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
issued : total=r=0/w=26320/d=0, short=r=0/w=0/d=0
Run status group 0 (all jobs):
WRITE: io=421120KB, aggrb=4191KB/s, minb=4191KB/s, maxb=4191KB/s, mint=100481msec, maxt=100481msec
Disk stats (read/write):
sda: ios=88/20984, merge=0/4930, ticks=26720/8375643, in_queue=8406951, util=99.97%
1.5混合读写
[root@localhost ~]# fio -filename=/dev/sda -direct=1 -iodepth 1 -thread -rw=randrw -rwmixread=70 -ioengine=psync -bs=16k -size=15G -numjobs=100 -runtime=100 -group_reporting -name=mytest -ioscheduler=noop
mytest: (g=0): rw=randrw, bs=16K-16K/16K-16K, ioengine=psync, iodepth=1
...
mytest: (g=0): rw=randrw, bs=16K-16K/16K-16K, ioengine=psync, iodepth=1
fio 2.0.7
Starting 100 threads
mytest: (groupid=0, jobs=100): err= 0: pid=25089
read : io=128912KB, bw=1220.7KB/s, iops=76 , runt=105660msec
clat (msec): min=11 , max=1264 , avg=345.26, stdev=166.17
lat (msec): min=11 , max=1264 , avg=345.26, stdev=166.17
clat percentiles (msec):
| 1.00th=[ 65], 5.00th=[ 143], 10.00th=[ 172], 20.00th=[ 202],
| 30.00th=[ 235], 40.00th=[ 273], 50.00th=[ 314], 60.00th=[ 363],
| 70.00th=[ 416], 80.00th=[ 478], 90.00th=[ 562], 95.00th=[ 644],
| 99.00th=[ 840], 99.50th=[ 955], 99.90th=[ 1139], 99.95th=[ 1221],
| 99.99th=[ 1270]
bw (KB/s) : min= 1, max= 198, per=2.95%, avg=35.96, stdev=20.63
write: io=58832KB, bw=570168 B/s, iops=34 , runt=105660msec
clat (msec): min=57 , max=8709 , avg=2016.71, stdev=2887.91
lat (msec): min=57 , max=8709 , avg=2016.71, stdev=2887.91
clat percentiles (msec):
| 1.00th=[ 124], 5.00th=[ 182], 10.00th=[ 208], 20.00th=[ 253],
| 30.00th=[ 297], 40.00th=[ 347], 50.00th=[ 400], 60.00th=[ 482],
| 70.00th=[ 635], 80.00th=[ 6652], 90.00th=[ 7111], 95.00th=[ 7439],
| 99.00th=[ 8029], 99.50th=[ 8225], 99.90th=[ 8455], 99.95th=[ 8455],
| 99.99th=[ 8717]
bw (KB/s) : min= 1, max= 88, per=3.60%, avg=20.03, stdev=14.83
lat (msec) : 20=0.05%, 50=0.15%, 100=1.86%, 250=27.23%, 500=47.41%
lat (msec) : 750=13.42%, 1000=1.53%, 2000=0.46%, >=2000=7.89%
cpu : usr=0.28%, sys=0.27%, ctx=2240755, majf=0, minf=266180
IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
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=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
issued : total=r=8057/w=3677/d=0, short=r=0/w=0/d=0
Run status group 0 (all jobs):
READ: io=128912KB, aggrb=1220KB/s, minb=1220KB/s, maxb=1220KB/s, mint=105660msec, maxt=105660msec
WRITE: io=58832KB, aggrb=556KB/s, minb=556KB/s, maxb=556KB/s, mint=105660msec, maxt=105660msec
Disk stats (read/write):
sda: ios=8140/3693, merge=0/18, ticks=2781877/7405475, in_queue=10204799, util=99.97%
二、raid10、centos环境下
2
.1随机读
# fio --filename=/dev/sda -direct=1 -iodepth 1 -thread -rw=randread -ioengine=psync -bs=16k -size=15G -numjobs=30 -runtime=100 -group_reporting -name=mytest
mytest: (g=0): rw=randread, bs=16K-16K/16K-16K, ioengine=psync, iodepth=1
...
mytest: (g=0): rw=randread, bs=16K-16K/16K-16K, ioengine=psync, iodepth=1
fio 1.58
Starting 30 threads
Jobs: 30 (f=30): [rrrrrrrrrrrrrrrrrrrrrrrrrrrrrr] [3.0% done] [307.7M/0K /s]
Jobs: 30 (f=30): [rrrrrrrrrrrrrrrrrrrrrrrrrrrrrr] [100.0% done] [275.9M/0K /s] [17.3K/0 iops] [eta 00m:00s]
mytest: (groupid=0, jobs=30): err= 0: pid=2642
read : io=28954MB, bw=296375KB/s, iops=18523 , runt=100040msec 30个线程的结果
read : io=29201MB, bw=298894KB/s, iops=18680 , runt=100043msec 100个线程的结果
clat (usec): min=28 , max=347588 , avg=1617.31, stdev=7110.70
lat (usec): min=28 , max=347588 , avg=1617.47, stdev=7110.70
bw (KB/s) : min= 1274, max=20704, per=3.35%, avg=9924.42, stdev=2495.20
cpu : usr=5.26%, sys=23.72%, ctx=55872939, majf=0, minf=16392
IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
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=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
issued r/w/d: total=1853085/0/0, short=0/0/0
lat (usec): 50=0.13%, 100=47.50%, 250=38.82%, 500=1.79%, 750=1.32%
lat (usec): 1000=0.97%
lat (msec): 2=1.49%, 4=0.35%, 10=2.21%, 20=3.03%, 50=2.01%
lat (msec): 100=0.34%, 250=0.03%, 500=0.01%
Run status group 0 (all jobs):
READ: io=28954MB, aggrb=296375KB/s, minb=303488KB/s, maxb=303488KB/s, mint=100040msec, maxt=100040msec
Disk stats (read/write):
sda: ios=1852654/6, merge=0/0, ticks=2904424/239, in_queue=2905807, util=99.96%
2.2
混合读写
[root@localhost ~]# fio -filename=/dev/sda -direct=1 -iodepth 1 -thread -rw=randrw -rwmixread=70 -ioengine=psync -bs=16k -size=15G -numjobs=100 -runtime=100 -group_reporting -name=mytest -ioscheduler=noop
mytest: (g=0): rw=randrw, bs=16K-16K/16K-16K, ioengine=psync, iodepth=1
...
mytest: (g=0): rw=randrw, bs=16K-16K/16K-16K, ioengine=psync, iodepth=1
fio 1.58
Starting 100 threads
Jobs: 100 (f=100): [mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm] [4.0% done] [540K/311K /s] [33 /19
[50 /18 iJobs: 100 (f=100): [mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm] [100.0% done] [737K/311K /s] [45 /19 Jobs: 52 (f=52): [mmmm__mmm___m_mmmm_mmm__m__m_m_m_mmmmm___m___m__mmmmm__m__m_m_m____mmm_m__m_mmm_____m___mmmmmmm____m] [2.1% done] [524K/311K /s] [32 /19 iopsJobs: 26 (f=26): [__m___m_______mm_m__m______m_m___mmmm________m_____m______m_m______mm__m_____mm_________m_mmm_m_____] [1.4% done] [245K/180K /s] [15 /11 iopsJobs: 14 (f=14): [______________m_____m______m_____mmmm________m_____m________m______m___m___________________m__m_____] [1.2% done] [0K/196K /s] [0 /12 iops] [eta 02h:24m:03s]
mytest: (groupid=0, jobs=100): err= 0: pid=9308
read : io=59808KB, bw=590161 B/s, iops=36 , runt=103774msec
clat (usec): min=684 , max=2645.1K, avg=1267852.97, stdev=382074.54
lat (usec): min=684 , max=2645.1K, avg=1267853.21, stdev=382074.54
bw (KB/s) : min= 0, max= 61, per=1.74%, avg=10.02, stdev= 6.04
write: io=26704KB, bw=263504 B/s, iops=16 , runt=103774msec
clat (msec): min=20 , max=10514 , avg=3228.80, stdev=957.30
lat (msec): min=20 , max=10514 , avg=3228.80, stdev=957.30
bw (KB/s) : min= 0, max= 31, per=1.31%, avg= 3.36, stdev= 3.06
cpu : usr=0.19%, sys=0.23%, ctx=1590713, majf=0, minf=171176
IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
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=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
issued r/w/d: total=3738/1669/0, short=0/0/0
lat (usec): 750=0.06%, 1000=0.20%
lat (msec): 2=0.48%, 10=0.04%, 20=0.31%, 50=0.13%, 100=0.09%
lat (msec): 250=0.11%, 500=0.09%, 750=1.76%, 1000=12.45%, 2000=54.04%
lat (msec): >=2000=30.24%
Run status group 0 (all jobs):
READ: io=59808KB, aggrb=576KB/s, minb=590KB/s, maxb=590KB/s, mint=103774msec, maxt=103774msec
WRITE: io=26704KB, aggrb=257KB/s, minb=263KB/s, maxb=263KB/s, mint=103774msec, maxt=103774msec
Disk stats (read/write):
sda: ios=3769/1670, merge=0/0, ticks=4770603/5384138, in_queue=10162892, util=100.00%
