Virtual Login server

[Tom Kavanaugh]

Hi Joe,

Thanks for your email.

We are talking Linux/Unix here, no Windoze pls!.
Yes, all the current login servers in my env are RedHat Linux, Solaris.

Users do run interactive graphics jobs on the compute grid. This does impose
a load on the login servers. 10-15 users is what we would like to see on a
single linux/solaris login server. Beyond that does slow down response.

Users ssh into one of these linux/solaris login servers and run the vnc
server. The vnc server then gives them a vnc display number. The user then
connects from his PC using the Windoze vnc client and points to the vnc
server display number.

> did you look in the HOWTO?
I already looked there, but did not find any info related to vnc logins.

> Can you vnc through ssh (you've got to be able to do this)?
Hmm.... I don't know.
I can ssh into the login server, and then bring up the vnc server or vnc
client.

>Do you know what ports are involved?
VNC starts using ports from 5900. The first user is on port 5901, second on
5902, and so on.

Hope this helps.

Regards
Tom


On 9/12/06, Joseph Mack NA3T <jmack at wm7d.net> wrote:
>
> On Tue, 12 Sep 2006, Tom Kavanaugh wrote:
>
> > Hello,
> >
> > I am newbie to this area, so pls excuse me if my questions are basic.
> >
> > I have a bunch of VNC servers that users login to submit
> > jobs to a compute grid. Currently, users login to
> > individual login servers, and thus some login servers are
> > more loaded than others.
>
> I know this isn't why you posted, but how much of a load is
> a login causing on a login server, particularly when all
> it's going is submitting batch jobs to a grid. Couldn't one
> login server handle 1000 logins?
>
> Now that I'm thinking about it, vnc is the program that
> allows you to display a windows window on a linux client.
> Are the login servers all windows, sending windowing
> commands etc back to (linux?) clients? In that case the
> login servers have a fair bit of work to do.
>
> > Also, users have no idea which of the VNC servers are more
> > loaded and hence to avoid. I am looking to build a single
> > login server that a user can login. And, then that virtual
>
> I presume you mean "single login virtual server"
>
> > login server can direct the user login to another real
> > login server.
> >
> > Can someone tell me if LVS can do this?
>
> don't know
>
> > Has it been implemented already?
>
> did you look in the HOWTO?
>
> Presumably there are multiple ports involved in the vnc
> connection. For LVS to work, the tcpip server end has to be
> on the vnc server (windows doesn't most network stuff
> peer-to-peer, rather than client-server like the internet -
> Bill Gates didn't think the internet was worth bothering
> about, at least till he saw that W95 would be a flop unless
> he could enable it for tcpip). Or else all the packets have
> to be encapsulated in a single port tcpip stream, like an
> ssh connection. Can you vnc through ssh (you've got to be
> able to do this)?
>
> Do you know what ports are involved?
>
> why are your login servers vnc/windows?
>
> Joe
>
> --
> Joseph Mack NA3T EME(B,D), FM05lw North Carolina
> jmack (at) wm7d (dot) net - azimuthal equidistant map
> generator at http://www.wm7d.net/azproj.shtml
> Homepage http://www.austintek.com/ It's GNU/Linux!
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