On Wed, 2020-09-23 at 13:05 +0200, Karel Zak wrote: > Hi, > > I have created an experimental testing tool to generate a large > number of > mount/umount operations on a large number of mount points. The > important feature > is that it does not use standard mount(8) command and it does not > parse > anything in /proc. This sounds great for testing large mount table and high notification rates. I'll certainly give a a spin as soon as I can get back to that systemd change for high notification rate handling, I've had trouble with various distractions lately unfortunately. Thanks Karel. > > The goal is to have a standard tool to easily reproduce mount load > without > writing a custom shell scripts. > > The number of features is pretty basic and it supports only tmpfs > now. Maybe > later it will support other filesystems, regular block devices (or > loopdevs) > and more operations (like remount, execute scripts, etc.). We will > see ... > > The tool creates and cleanup all stuff, you do not have create > mountpoints, etc. > > It's maintained in separate branch in util-linux repository: > > git clone https://github.com/karelzak/util-linux.git --branch > topic/mountbomber --single-branch > cd util-linux > ./autogen.sh > ./configure > make mountbomber > > > Examples: > > > # mountbomber --parallel 1 --verbose \ > --oper "mount:all,@A,umount:rand,mount:last,- > >A(loops=2),umount:all" > > - one process, 100 mountpoints (default), random umount and mount > two times > > > # mountbomber --verbose --pool 10 \ > --oper > "mount:all,@A,umount:next,mount:last,delay(500000),- > >A(loops=200),umount:all" > > - 200 times umount and mount in order > > > # mountbomber --pool 10000 \ > --oper > "mount:all,@A,umount:rand,mount:last,delay(1000),- > >A(seconds=60),umount:all" > > > - 10 processes (default) repeating random umount/mount for 1 > minute on 10000 mountpoints > - your udisks will be pretty busy :-) > > For more details: > > $ mountbomber --help > > there is no man page yet. > > > Karel >
