I am experimenting with the iostat -c 1 command, and I was wondering if there is a simple way of reading the current output and then separating the values so that I could generate a .csv file.
The goal is to be able to generate graphs, using the data outputted by iostat over a time period. I'm not looking for a complete script, just some hints that would help me achieve my goal.
Typically the same data that iostat collects and displays is also collected by sysstat a.k.a. sar
sar comes with a supporting tool sadf that can easily display the collected stats in a number of convenient formats, including , XML, JSON and CSV.
I.e. for CSV try something like:
sadf -dh -- <sar options>
Where for instance the sar options -b -d will display block device IO.
sadf -dh -- -b -d
This cheat sheet might point you at other useful sar options:
(source: brendangregg.com)
