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Re: removing an ext2fs file forces disk activity
From: |
Jeroen Dekkers |
Subject: |
Re: removing an ext2fs file forces disk activity |
Date: |
Mon, 25 Mar 2002 17:13:58 +0100 |
User-agent: |
Mutt/1.3.27i |
On Mon, Mar 25, 2002 at 10:07:25AM -0500, Marcus Brinkmann wrote:
> Hi,
>
> I just found out that
>
> while touch /tmp/foo; do rm /tmp/foo; done
>
> causes a lot of disk activity. Further tests showed that the disk is
> activated for each rm. Is this a hard requirement? In Linux, the loop
> above does not cause any disk activity (except at the beginning and
> maybe at the end), it seems to be done completely in the cache.
I found out another thing a few days ago.
Have a directory with a lot of files (for example gcc or glibc build
tree) and then do "rm -rfv <dir>", it looks like all files are deleted
one by one on the hard disk and the next one is deleted after the
previous one is written to disk.
I think the speed of the filesystem is one of the biggest performance
issues in the Hurd. I think ext2fs itself isn't only factor, the Linux
drivers with the glue code could also have some performance issues.
Jeroen Dekkers
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- removing an ext2fs file forces disk activity, Marcus Brinkmann, 2002/03/25
- Re: removing an ext2fs file forces disk activity, Thomas Bushnell, BSG, 2002/03/25
- Re: removing an ext2fs file forces disk activity,
Jeroen Dekkers <=
- Re: removing an ext2fs file forces disk activity, Ludovic Courtès, 2002/03/26
- Re: removing an ext2fs file forces disk activity, Thomas Bushnell, BSG, 2002/03/26
- Re: removing an ext2fs file forces disk activity, Niels Möller, 2002/03/26
- Re: removing an ext2fs file forces disk activity, Thomas Bushnell, BSG, 2002/03/26
- Re: removing an ext2fs file forces disk activity, Niels Möller, 2002/03/26
- Re: removing an ext2fs file forces disk activity, Thomas Bushnell, BSG, 2002/03/26
- Re: removing an ext2fs file forces disk activity, Niels Möller, 2002/03/26
- Re: removing an ext2fs file forces disk activity, Ludovic Courtès, 2002/03/27
- Re: removing an ext2fs file forces disk activity, Jeroen Dekkers, 2002/03/27
- The X server and nice(), Ludovic Courtès, 2002/03/27