On Thu, 2010-05-06 at 08:54 +0930, Iain Buchanan wrote:
> but it's an angle to follow. I wonder how max_user_watches would handle
> being 100k or more... no doubt you just need some RAM?!
>
> thanks,
To answer my own questions, I'm now trying this:
# echo 100000 >/proc/sys/fs/inotify/max_user_watches
$ time sudo find / -xdev -type d | sudo inotifywatch -v -t 1 -e
modify,attrib,move,create,delete,delete_self,unmount --fromfile -
Establishing watches...
Total of 71169 watches.
Finished establishing watches, now collecting statistics.
Will listen for events for 1 seconds.
total modify filename
6 6 /tmp/
2 2 /dev/
real 0m3.177s
user 0m0.768s
sys 0m1.378s
This sets up a watch on all directories under / that aren't part of
another filesystem, and then exits after one second. It's quite fast :)
The idea, off the top of my head, would be this:
1. inotifywatch as above but without the time restriction
2. wait for it to finishing "setting up"
3. rsync the whole directory structure to the backup
4. continuously do this loop:
1. get list of changes from inotifywatch
2. rsync those changes
Unfortunately inotifywatch only returns output on ctrl-c, which I don't
want to do or you loose anything changed between instances. This could
be changed to another signal, no doubt.
How does that sound for a continuous running backup? This is starting
to stray OT from Gentoo, but your thoughts are welcome :)
--
Iain Buchanan <iaindb at netspace dot net dot au>
One cannot make an omelette without breaking eggs -- but it is amazing
how many eggs one can break without making a decent omelette.
-- Professor Charles P. Issawi
