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or you could just use a disk shared via nfs or coda or something along
those lines, if you don't want to spend the $ for fibre channel shared
scsi devices or something along those lines. =)
or are you saying there would be issues/flaws in that?
-tcl.
On Thu, 9 Sep 1999, Ilan Steemers wrote:
> Hi,
>
> How would you handle the data integrity across the servers? If mail comes in
> it would have to be distributed among all the server, cause you don't know
> where the user is going to pop. When a user pop's on a server, you would have
> to delete those mail's on the other server as well. Load balancing works fine
> for HTTP and FTP cause the data for those are pretyy static. SMTP would be
> fine too, but POP? I doubt if that will work.
> Oh wait, you could run those servers on a single high speed shared scsi
> device. That way there's only one copy of the data. Those systems are rather
> expensive, but it might work.
>
> Regards,
>
> Ilan Steemers
>
> hack@xxxxxxxxxxxxx wrote:
>
> > Hi folks,
> >
> > The ISP in the Netherlands that I'm currently working for, want me to
> > implement a scalable, high available (load balancing) mailserver. I have
> > been looking around and think the best way to do this is by having a daemon
> > listen to port 110 (POP3). This daemon will first ask the user's name and
> > then handle the traffic between the selected mailserver (the one with, for
> > example, the lowest traffic) and the user. I have a few questions, maybe
> > you folks can help me:
> >
> > - Since this daemon will be a SPOF (single point of failure), what do I
> > have to pay extra attention to?
> >
> > - Am I right when I think that there will be a maximum of 30,000 users at
> > the same time (since the daemon will have to open both sockets to the user
> > and the mailserver)? Can DNS be used as a solution for this?
> >
> > - Does anyone know of a daemon (or any software in general) that does
> > something similar to what I want to do or an URL with more info on this
> > subject (POP3 specific)?
> >
> > Any help is appreciated!
> >
> > Greetings, Norbert de Jonge
> >
> > ----------------------------------------------------------------
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> >
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