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SubjectRe: ext3-0.0.2e released
Ookhoi wrote:
>
> Hi Chris,
>
> > On Wed, Jul 05, 2000 at 02:30:20PM -0700, Thomas Davis wrote:
> >
> > Try 500GB. That's right. Large. Big.
> >
> > Filesystem 1k-blocks Used Available Use% Mounted on
> > /dev/rza1 146144 56684 81916 41% /
> > /dev/rza3 511858304 61405604 424845604 13% /export/data
> >
> > Filesystem Inodes IUsed IFree IUse% Mounted on
> > /dev/rza1 37760 7029 30731 19% /
> > /dev/rza3 2000896 303012 1697884 15% /export/data
> >
> > These crash, and it's a minimum of 3 hours waiting.
> >
> > Any idea how long it will take if the disks were 'full' -- I ask this
> > beaks I'm thinking about an applicator in the next couple on months
> > where I would have multiple 400GB raid-arrays, mostly full with small
> > (<10M> files.
> >
> > Because if the high fsck times, I was thinking maybe I would make
> > many many 50GB filesystems instead, but it's a pain to manage.
>
> Why not use Reiserfs? I think journaling is a must with disks that
> large, and reiserfs is faster dan ext2 if you have a lot of files/dirs
> in a directory.
>

Uhm simple.

1) it's using software raid (note - NOT md). Software raid5 &
journaling filesystems in v2.2 don't get along.

2) reiserfs kept changing their on disk format until recently. We can't
just reformat 500gb of data every few weeks.

3) journaling wasn't available when these large filesystems went online,
and we wasn't going to reformat just for journaling.

That's my story, and I'm sticking to it.

--
------------------------+--------------------------------------------------
Thomas Davis | PDSF Project Leader
tadavis@lbl.gov |
(510) 486-4524 | "Only a petabyte of data this year?"

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