[EMAIL PROTECTED]> <[EMAIL PROTECTED]> <011501c09c3f$00b4b750$8181608f@cn
w.co.nz>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-scanner: Scanned by Inflex & McAffee.
Hi.
Looking at the docs, in particular install-configure.html, it only
mentions problems on linux boxes after a crash, so it probably just
needs to be sure that all writes are fully completed. A journalling
filesystem should provide the same features.
As for the number of folders, 11500 is quite few, but it's only really
about 28 mailboxes per user. Looking at my own mail, I personally have
116. :-) I'm probably not quite "user typical", as I have lots of
filters for email reports from various systems around our network, not
to mention being subscribed to about 30 mailing lists. :-)
I've been thinking about it, I think doing either a filesystem upgrade
or doing an upgrade to 2.0.x will give you an acceptable performance
improvement, but doing both will allow your system to scale much better.
T.
Roland Pope wrote:
>
> I thought setting the +S bit was to get around file locking issues, to prevent
> more than one process at a time from updating files?
> Also, we have around 11500 entries in our mailboxes file, would this seem like
a
> lot??
> ----- Original Message -----
> From: "Tristan Ball" <[EMAIL PROTECTED]>
> To: "Roland Pope" <[EMAIL PROTECTED]>
> Sent: Wednesday, February 21, 2001 7:37 PM
> Subject: Re: Cyrus file system performance
>
> > Reiserfs should allow you to put synchronous writes back on. You'll cop
> > a little performance hit on writes versus normal ext2, because it's a
> > journalling filesystem, but nothing like what you're having now. It's
> > about to be included in kernal 2.4.1, or 2.4.2, but Suse have had it in
> > production 2.2 series kernels for some time. (part of the reason linus
> > is allowing it into the 2.4.x series).
> >
> > For the record, I run without setting the +S bit, and have no problems.
> > I realise I might if I have a power failure, but I have nightly backups,
> > and a days mail is a pain, not a nightmare for us. :-)
> >
> > Moving to Cyrus 2.0.x, which uses a database for the mailbox list would
> > also help hugely, as then cyrus doesn't have to write out the whole
> > file, which really really hurts. :-)
> >
> > T.
> >
> > Roland Pope wrote:
> > >
> > > I am running Cyrus 1.6.24 for around 400 users under Red Hat 6.2 (2.2.14-1
2
> > > Kernel) on a Dual Xeon with 512 Mb of memory using the EXT2 file system. A
s
> > > suggested in the manual, I have set the synchronous bit on the /var/imap a
nd
> > > /var/spool/imap directories. As a result, things go very slow when
> performing
> > > tasks like adding and deleting folders and changing ACLs on folders. Does
> anyone
> > > have any suggestions how to get a performance increase in this area? Are
> there
> > > other filesystems being used without +S set?? Does 2.0.12 improve things i
n
> this
> > > area? What about later versions of Linux?
> > >
> > > Thanks
> > > Roland Pope
> >
> > --
> > -=*=-=*=--=*=-=*=-=*=-
> > Tristan Ball
> > System Administrator
> > Vision Systems
> > ph 03 9211 7064
> > -=*=-=*=--=*=-=*=-=*=-
> >
> >
--
-=*=-=*=--=*=-=*=-=*=-
Tristan Ball
System Administrator
Vision Systems
ph 03 9211 7064
-=*=-=*=--=*=-=*=-=*=-
