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02. [10p] Iostat
Parameteres for iostat:
- -x for extended statistics
- -d to display device stastistics only
- -m for displaying r/w in MB/s
$ iostat -xdm
Use iostat with -p for specific device statistics:
$ iostat -xdm -p sda
[10p] Task A - Monitoring the behaviour
- Run iostat -x 1 5.
- Considering the last two outputs provided by the previous command, calculate the efficiency of IOPS for each of them. Does the amount of data written per I/O increase or decrease?
NON-DEMO TASK
Add in your archive screenshot or pictures of the operations and the result you obtained, also showing the output of iostat from which you took the values.
How to do:
- Divide the kilobytes read (rkB/s) and written (wkB/s) per second by the reads per second (r/s) and the writes per second (w/s).
- If you happen to have quite a few loop devices in your iostat output, find out what they are exactly:
$ df -kh /dev/loop*
