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* Description: Command of displaying IO state on Linux platform
* Date: 03:42 PM EST, 06/13/2017
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<1> Command "iostat":
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|__ $ iostat 2 3
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|__ o. The utility generates three types of reports, the CPU Utilization report, the Device Utilization report and the Network Filesystem report.
o. Above indicates displaying the report every 2 seconds for 3 times.
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Linux 2.6.32-642.11.1.el6.x86_64 (nebf1s2k242.nebf.com) 06/13/2017 _x86_64_ (2 CPU)
avg-cpu: %user %nice %system %iowait %steal %idle
1.79 0.00 0.52 7.11 0.00 90.58
Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
sda 2.14 275.62 10.38 175643526 6612686
sdb 18.68 3690.22 1013.96 2351662074 646166160
sdc 0.00 0.01 0.00 3720 0
dm-0 2.22 161.87 8.05 103155330 5131312
dm-1 0.01 0.01 0.10 8016 65848
dm-2 0.77 113.05 2.22 72042826 1415368
avg-cpu: %user %nice %system %iowait %steal %idle
0.25 0.00 0.00 0.25 0.00 99.50
Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
sda 0.00 0.00 0.00 0 0
sdb 2.00 0.00 48.00 0 96
sdc 0.00 0.00 0.00 0 0
dm-0 0.00 0.00 0.00 0 0
dm-1 0.00 0.00 0.00 0 0
dm-2 0.00 0.00 0.00 0 0
avg-cpu: %user %nice %system %iowait %steal %idle
0.00 0.00 0.25 0.00 0.00 99.75
Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
sda 0.00 0.00 0.00 0 0
sdb 0.00 0.00 0.00 0 0
sdc 0.00 0.00 0.00 0 0
dm-0 0.00 0.00 0.00 0 0
dm-1 0.00 0.00 0.00 0 0
dm-2 0.00 0.00 0.00 0 0
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