Anyone have any info on JFS?


----- "Josh Malone" <jmalone AT nrao DOT edu> wrote:
>
> > It's hard to judge; but basically if there are a lot of processes
> waiting
> > for I/O (a 'D' state in 'top'); try cutting down the number of
> concurrent
> > backups. You'll have to judge for yourself what the best number for you
> is.
> > It may be that things work fastest when there's a certain amount of disk
> > contention; but no more and no less.
>
> Also - you need a good filesystem to handle lots (or even not so many) of
> backups. I reently switched from EXT3 to EXT4 and saw on order of magnitude
> (I kid you not, 10+ hours to 1) reduction in the backup time and system
> load. Unfortunately, I think this introduced some problems in the RHEL5
> ext4 code so I also switched from 32-bit RHEL5 to 64-bit -- that seems to
> have cleared up the problems.
>
> -Josh
>
>
> --
> --------------------------------------------------------
>        Joshua Malone       Systems Administrator
>      (jmalone AT nrao DOT edu)    NRAO Charlottesville
>         434-296-0263         www.cv.nrao.edu
>         434-249-5699 (mobile)
> BOFH excuse #202:
>
> kernel panic: write-only-memory (/dev/wom0) capacity
> exceeded.
> --------------------------------------------------------
>
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