It was mentioned recently [1] that NILFS doesn’t handle frequent
file “creation-removal” cycles well, and these are typical to,
in particular, # apt-get install (upgrade) operation.
I’m currently using NILFS for “root” filesystems of a couple of
chrooted environments I use to test new software, which implies
that Debian packages are installed and upgraded quite often.
As a work-around, I’ve made a copy of the filesystem on tmpfs,
and run # apt-get from there, like:
# chroot /tmp/debian.UvYusUaj apt-get upgrade
Then, I propagate the changes back to the original NILFS root
with rsync(1), like:
# rsync -x -a -v -rlOtH \
-b --suffix=.~$(date +%s)~ --backup-dir=.rsync-backup \
--exclude=/.rsync-backup/ --exclude=/.nilfs \
--delete \
-- /tmp/debian.UvYusUaj/ /srv/chroot/2012-07-06-unsafe/
This obviously results in much less checkpoints, too, and thus,
AIUI, less overall stress to the filesystem.
(Sometimes, I’d also chcp(8) the latest of the newly-made
checpoints into a snapshot.)
[1] http://permalink.gmane.org/gmane.comp.file-systems.nilfs.user/2397
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