[6241] in linux-scsi channel archive
Re: how to get maximum datarate from SCSI
daemon@ATHENA.MIT.EDU (Dietmar Stein)
Thu Apr 1 13:02:19 1999
Date: Thu, 01 Apr 1999 19:39:49 +0200
To: "Stephen C. Tweedie" <sct@redhat.com>, linux-scsi@vger.rutgers.edu
From: dstein2203@t-online.de (Dietmar Stein)
Hi Stephen
now I got the same problem as the guy I answered a few days ago - is
there any possibility to switch off cache for filesystem and devices
under linux except the sync-option?
Maybe to decrease cache in the kernel?
I made a request under the subject "Buffering / caching filesystem" if
you would like to read more.
Dietmar
Stephen C. Tweedie wrote:
> Hi,
>
> On Wed, 24 Mar 1999 22:39:06 +0100, dstein2203@t-online.de (Dietmar
> Stein) said:
>
> > You can mount your disks with sync-option in order to go around the
> > buffer/cache. Have a try (e.g. mount -o sync /dev/sda1 /mnt) and
> > compare the performance.
>
> No. O_SYNC or mount -o sync both give you write-through caching. The
> cache is still very much present.
>
> --Stephen
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