2012/5/27 Adam Borowski wrote: > I think that box had jfs, but other filesystems are no different: for > example, ext* will fsync() during a rename() call behind your back even > if you don't request it, forcing every file to hit the disk
This is easy to check: $ cd /path/to/tmpfs $ touch 1 $ time for i in `seq 10000`; do mv $i $((i+1)); done real 0m9.760s user 0m2.727s sys 0m6.773s $ cd /path/to/ext3 $ touch 1 $ time for i in `seq 10000`; do mv $i $((i+1)); done real 0m9.624s user 0m2.679s sys 0m6.877s I don't see major difference. Both tests gave 9.5-9.8s range between runs. Maybe your filesystem is to blame? > So don't tell me real filesystems are "almost as good" as tmpfs Tests tell you that. :) Actually real filesystem is not just "as good", it's better, because it does not eat memory and slow down other running programs when writing to disk. -- Serge -- To UNSUBSCRIBE, email to debian-devel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/caovenermwbuku08ahyo8f5-ejahzjct6_gy+snyjdqkq7w-...@mail.gmail.com
