Messages in this thread | | | From | Karl Vogel <> | Subject | ext3 reservation strangeness?! | Date | Mon, 25 Oct 2004 14:21:29 +0200 |
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When copying a file on 2.6.9-mm1 with the ext3 reservation code, I noticed that there were a lot of fragments. Doing the same when the filesystem is mounted with 'noreservation' seems to produce better results?! Or am I interpreting this incorrectly?
Example:
[root@kvo kvo]# ls -l t -rw-r--r-- 1 root root 8228490 Oct 23 14:45 t
Copying this file with reservation code active:
[root@kvo kvo]# mount -t ext3 -o commit=60,reservation /dev/sda1 /mnt [root@kvo kvo]# cp t /mnt [root@kvo kvo]# filefrag /mnt/t /mnt/t: 129 extents found, perfection would be 1 extent [root@kvo kvo]# rm -f /mnt/t [root@kvo kvo]# umount /mnt
While doing the same with 'noreservation' produces only 2 extents:
[root@kvo kvo]# mount -t ext3 -o commit=60,noreservation /dev/sda1 /mnt [root@kvo kvo]# cp t /mnt [root@kvo kvo]# filefrag /mnt/t /mnt/t: 2 extents found, perfection would be 1 extent [root@kvo kvo]# rm -f /mnt/t
There was enough free diskspace available:
[root@kvo kvo]# df /mnt Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda1 76904352 25383252 47614496 35% /mnt
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