--- John Madden <[EMAIL PROTECTED]> wrote:
> > We are a small biz that wants to start implementing clustering of our
> > services, but not sure if LVS is necessary just yet. We are starting
> with
> > just two boxes with both HTTPD/SquirrelMail and MTA/IMAP on both boxes
> with
> > NFS-based backend on a 3rd machine. We'll put all mail spools and SM
> data
> > dirs and PHP sessions (file-based) on the NFS machine.
> >
> > Our question is if there will be any problems to consider starting out
> with
> > a DNS round-robin load balancing instead of more complex LVS stuff?
>
> I suggest that you not store your mail spools on NFS. Do IMAP over the
> network to
> a load-balanced imapd if you want (with GFS on shared scsi/san storage),
> but for
> heaven's sake, don't point your imapd at an NFS export.
If I have more than one IMAP server (at least on different machines), then
how else do I point all IMAP servers to the mail spool beside
NFS/GFS/AFS/etc? The connection from clients (SM, etc) to IMAP will of
course be regular IMAP connections/protocol. Eventually, we have our eye on
Perdition to help load balance IMAP connections.
> Your IMAP server shouldn't need to be load balanced anyway, so you could
> take that
Why?
> complication out of the picture if you want. Load balancing an MTA via DNS
> (not
> using MX records) seems to be asking for trouble too, although I can't put
> my
> finger on why.
OK, thanks.
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