ext3 / XFS [Was: Re: Does anyone allow unlimited or extremely large quotas?]

LALOT Dominique dom.lalot at gmail.com
Wed Nov 17 02:50:48 EST 2010

We use ext4 for more than one year now. Efficient and stable. A good choise
12 spool of 250GB over 10 FC disks using metalun.


2010/11/16 Robert Mueller <robm at fastmail.fm>

> > > This is depends on what filesystem you are useing, I have mailboxes
> with hundreds
> > > of thousands of messages in them on XFS and have no problems, but on
> ext3 I
> > > start seeing slowdowns with a bit over ten thousand messages.
> >
> > Was dir_index enabled on that ext3 filesystem?  Prior to dir-index ext3
> > was very slow for large folders. dir_index is not enabled by default in
> > ext3.
> FYI our experience at Fastmail 2 years back was that reiserfs still much
> better than ext3 (even with dir_index) at handling large numbers of
> files in folders. We tried switching one server to ext3, but after a
> week or two it was being crushed by load and we switched back to
> reiserfs.
> However we've recently found that ext4 is at least as good as reiserfs
> at handling large directories, so we've started switching everything to
> ext4 and so far the migration is going well.
> So don't use ext3, but ext4 is ok.
> Oh, and we recently setup a spare machine with btrfs and tried
> replicating a few partitions to it. That wasn't good. Started off
> promising, but by the time it was 1/3 full, the machine was utterly
> crawling. Clearly not ready for production yet.
> Rob
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Dominique LALOT
Ingénieur Systèmes et Réseaux
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