[JDEV] server installation

[Robert Thompson]

An interesting thought is:

When does a typical T1 Bandwidth begin to be the bottleneck versus the
Server?

OR

When will Memory Size, SCSI RPM Speed and Processor Speed begin to
out-perform the possible traffic that could reach 1 Server on a T1?

These are very important questions because some of us are creating services
with the goal of them being Very Popular...and if so, it's nice to know your
prepared.

- Robert



----- Original Message -----
From: David Waite <mass at ufl.edu>
To: <jdev at jabber.org>
Sent: Thursday, January 20, 2000 8:43 AM
Subject: Re: [JDEV] server installation


> With pth, the individual user threads get 32k (correct me pease if I'm
> wrong) so 10,000 users would use up 320MB. This is not counting the kernel
> structures for process tables and TCP buffers (I believe the TCP buffer is
> 8k each direction, but I am hardly an expert on the networking side of
> l-k)
>
> One thing that could be done is customizing pth to use just 16k of memory
> per thread, but I don't believe it will allow processes to expand outside
> of that (meaning, it may just crash). one of the config files (I believe
> config.h) has to be edited to allow for more than 1024 file descriptors
> (read, sockets) per process.
>
> Basically there hasn't been a ton of high-load testing, other than stress
> testing for bugs. Real world tests will need to come either from people
> conducting simulations, or from actual deployment.
>
> (keep in mind all numbers are for simultaneous online users, I don't see
> any reason you couldn't have 100,000 users on a p233 if only a small
> fraction were actually online.)
>
> -David Waite
>
> On Thu, 20 Jan 2000, Thomas Charron wrote:
>
> > Quoting Robert Thompson <robert at sv3.com>:
> > > On that note of installation, does anyone know how I make a Net Boot =
> > > disk for Red Hat Linux for an Intel System (Pentium II MMX, SCSI =
> > > Adaptec)?
> >
> >   Just get the netboot.i image, and dd or rawrite it to a floppy.
That's
> > pretty much it.  The install takes over from there..
> >
> > > Also, I want to confirm that 256Meg of RAM and a 266Mhz PII Processor
=
> > > with 8GIG SCSI drive is enough to handle the approx. 10,000 user limit
=
> > > of Jabber on Linux (not that it's limited to 10k but I remember
someone =
> > > did a test a while back and it was about 10k).
> >
> >   It should work.  At high user counts, the primary limitation is memory
> > contraints.  I haven't had a chance to actually stress test the newer
releases
> > in CVS, but I'll try to do that soon to give you a better idea of the
current
> > code base.
> >
> >   It should also be noted that by default, Linux will only accept 1024
TCP
> > connections.  Adding more simo connections requires a kernel patch to
increase
> > this limit.
> >
> > ---
> > Thomas Charron
> > << Wanted: One decent sig >>
> > << Preferably litle used  >>
> > << and stored in garage.  ?>>
> >
> > _______________________________________________
> > jdev mailing list
> > jdev at jabber.org
> > http://mailman.jabber.org/listinfo/jdev
> >
>
>
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