Round-robin is where the http daemon alternates requests between two
different boxes.
This has a couple of advantages. First, if one box goes down, you still
have part of your hardware up so you dont have a single point of failure.
Also, its more cost effective in the hardware area. A single 4 way Xeon box
will easily cost you 6-7 thousand dollars. But, two dual P-III boxes will
cost a lot less for the basic hardware..
Granted, a single 4 way Xeon box sounds really hot and sexy but its not
really very smart if you're wanting to set up a high-traffic web site.. You
want to eliminate all single points of failure. Plus, I must admit I'm a
bit jaded.. A 4 way Xeon is nothing where I work.. I get to work on large
Sun Enterprise servers that have 64 processors and 40 gigs of ram. We have
7 back end servers and all of them are sent requests from our two web server
boxes using the round-robin process..
----- Original Message -----
From: Pastor Torrente, Guillermo <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, November 22, 1999 4:44 AM
Subject: RE: [expert] High level SMP systems...
> please, what is "round-robin"?
>
> TIA!
>
> > ----------
> > De: Darin Martin[SMTP:[EMAIL PROTECTED]]
> > Responder a: [EMAIL PROTECTED]
> > Enviado el: lunes 22 de noviembre de 1999 7:12
> > Para: [EMAIL PROTECTED]
> > Asunto: Re: [expert] High level SMP systems...
> >
> >
> > ----- Original Message -----
> > From: Matthew Hart <[EMAIL PROTECTED]>
> > To: Expert Mandrake List <[EMAIL PROTECTED]>
> > Sent: Sunday, November 21, 1999 10:10 PM
> > Subject: [expert] High level SMP systems...
> >
> >
> > > Does anyone know of any board manufacturer who makes a quad way SMP
> > intel
> > > P2/3 motherboard?
> > >
> > > Thx
> > >
> > The standard P-II/P-III chips will not work in 4 or 8 way configurations
> > because of limitations in the LX, BX, and i820 chipsets. The 450 NX and
> > GX
> > chipsets will allow up to 8 way SMP, but those are chipsets that will
only
> > work with the more expensive Xeon processors that are slot 2 instead of
> > slot
> > 1.
> >
> > It would be theoretically possible to make P-II and P-III chips work in
4
> > or
> > 8 way SMP, but it would require a custom motherboard design. ALR used
to
> > do
> > things like that.. I don't know if they still do. You might try
checking
> > with them.
> >
> > Companies like Tyan, ASUS, Abit, etc... probably would not want to
invest
> > the time and money in developing something that is not very mainstream.
> >
> > Just curious.. Why not go with a clustered approach with round-robin..
Or
> > a
> > Beowulf style approach? Either way.. You'll get there for a lot less
> > money
> > than an expensive 4 way solution..
> >
> >
> >
> >
> > >
> >
> >
>
