Linux – How to be notified when the limit of a cgroup is hit

alertingcgrouplinuxmonitoring

I want to use cgroups to limit resources in linux

http://en.wikipedia.org/wiki/Cgroups

How can I be notified when a limit if hit. For example if I limit a process to 2 gigs or ram how will I know when that is reached if I am not actively monitoring it?

Best Answer

cgroups support a Notification API as described here in section 2.4: http://www.kernel.org/doc/Documentation/cgroups/cgroups.txt

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Linux – how can I limit per user bandwidth

Just to add on the above question.

You could use iptables with user matching to color the packets like so:

iptables -t mangle -A OUTPUT -p tcp -m owner --uid-owner someuser -j MARK --set-mark 100

And then use 'tc' to limit on a per user basis.

Linux Bash – How to Sort du -h Output by Size

As of GNU coreutils 7.5 released in August 2009, sort allows a -h parameter, which allows numeric suffixes of the kind produced by du -h:

du -hs * | sort -h

If you are using a sort that does not support -h, you can install GNU Coreutils. E.g. on an older Mac OS X:

brew install coreutils
du -hs * | gsort -h

From sort manual:

-h, --human-numeric-sort compare human readable numbers (e.g., 2K 1G)

Best Answer

Related Solutions

Linux – how can I limit per user bandwidth

Linux Bash – How to Sort du -h Output by Size

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