Is there an easy way to change the I/O priority of a whole group of processes the way renice -g
does? It seems like only changing the I/O priority of a single process is supported by ionice
. If this can't be done, can someone please point me to the the relevant API calls (I'm not at all familiar with the POSIX api) so that I can write a quick command line utility to implement this functionality myself?
Linux – ionice process group
ionicelinuxniceposix
Best Answer
You can make a script called gionice, like that:
Then, you can call it like that, for process group id 3266, for example:
"ps -s PID -o pid" prints line-by-line identifiers of processes whose group leader is PID. Then, for every line, xargs appends that line after "ionice -c 2 -n 0 -p " and calls the resulting command.
Hope that helps.