Adrian Head wrote:
>
> I have seen people complain about simular issues on the kernel mailing
> list so maybe there is an actual kernel problem.
>
> What I have always wanted to know but haven't tested yet is to test raid
> performance with and without the noatime attribute in /etc/fstab I
> think that when Linux reads a file it writes the time the file was
> accessed whereas a write is just a write. I expect that for benchmarks
> this would not affect results alot since SCSI systems would have the
> same overhead - but some people seem to swear by it for news servers and
> the like.
>
> Am I off track?
>
Um, this would effect benchmarks that use a filesystem, if you do a dd
if=/dev/hda of=/dev/null it doesnt consider the filesystem so i would
guess that time isnt updated and it wouldnt be an overhead.
hdparm -t works below the filesystem level as well, its just data, it
doesnt make sense of it, as far as i know.
Glenn
