I agree (connectionless, UDP) Re: [JDEV] scaling a single server?

[Robert Thompson]

> I strongly recommend connectionless protocols and UDP!

I **AGREE**

My goal has been to support client-to-client with the server being more of a
directory.

I just don't see myself implementing Jabber for communities where the goal
his high growth.

I've asked about this all along but a few keep saying that somehow this
no-upgrade transport possibility outweighs this -- fooey....Jabber should at
least have flexability for non-connect protocols....the chat I've got
working uses UDP, but I lack a white pages type setup...that's what I
thought Jabber would provide, but I'm starting to doubt that.

- Robert


> Regards,
> Stanislav
>
>
> ----- Original Message -----
> From: "Jacob O'Reilly" <jacob at clear.net.nz>
> To: <jdev at jabber.org>
> Sent: Thursday, February 03, 2000 9:27 PM
> Subject: Re: [JDEV] scaling a single server?
>
>
> > I can't give you any idea about scalability of Jabber, but I do know
that
> > the number of sockets a process can have open is tunable in the kernel.
I
> > don't know for Linux (as opposed to the commercial Unices I've used)
> whether
> > that is a socket specific parameter or just a factor of NFILE.  I
imagine
> > that with that many users tho., a fair few parameters might need to be
> > changed.
> >
> > One of the things I've seen software do to scale better (to thousands of
> > concurrent users) is to use the UDP protocol -- and maintain the idea of
a
> > connection at an application layer.  This doesn't provide for the
simplest
> > coding, but given that your average user may not act to cause any
traffic
> > very often at all, it provides the least load on the server machine (in
> > terms of kernel/network resources anyway).
> >
> > It seems to me that a system of tiering connections through to a server
> > would provide the most scalability.  Can etherx run on a different
machine
> > from the Jabber server?
> >
> > -- Jacob.
> >
> > -----Original Message-----
> > From: Russell Nelson <nelson at crynwr.com>
> > To: jdev at jabber.org <jdev at jabber.org>
> > Date: Friday, 4 February 2000 09:48
> > Subject: [JDEV] scaling a single server?
> >
> >
> > >I've got a customer with 25 lakh users.  In case you're not familiar
> > >with the units they use in India (I wasn't), 1 lakh == 10,000.  They
> > >also comma-ize in an original and inventive manner, so they have
> > >2,50,000 users.  I'm trying to convince them NOT to implement a
> > >proprietary system.  This should not be impossible since they have
> > >developed a predilection to Open Source solutions.
> > >
> > >They want to add all 25 lakh users to Jabber all at once, and announce
> > >it.  Clearly there is not going to be a ramp-up period to give them
> > >time to gain experience with Jabber.  They need to know that it will
> > >scale from the get-go.
> > >
> > >Obviously this is OS dependent.  My customer is running Redhat 6.1 on
> > >a machine with 18GB of hard drive and 1GB of memory.  Those values
> > >should not be the constraint.  I'm more concerned with the number of
> > >sockets that can be open at any one time.  If Linux has a limit of
> > >1,000 sockets, and they have (they estimate) 25 thousand users online
> > >at any one time, that means they need 25 servers.  This is double-plus
> > >ungood.
> > >
> > >Does anyone have any experience with how big a single Jabber server
> > >can scale?
> > >
> > >--
> > >-russ nelson <sig at russnelson.com>  http://russnelson.com
> > >Crynwr sells support for free software  | PGPok | "Ask not what your
> > country
> > >521 Pleasant Valley Rd. | +1 315 268 1925 voice | can force other
people
> to
> > >Potsdam, NY 13676-3213  | +1 315 268 9201 FAX   | do for
ou..."  -Perry
> M.
> > >
> > >_______________________________________________
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> > >jdev at jabber.org
> > >http://mailman.jabber.org/listinfo/jdev
> > >
> >
> >
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>
>
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