[FreeNX-kNX] load-balancing doc?

[Matt Nicholson]

I do not. I had read this can cause issues due to NFS file locking. This is
why the "slave" systems forward all connections to the "master" node. This
way the session DB lives there, and only there. I didn't try the other way,
but just avoided it to start with.


Matthew Nicholson
nicholson at eps.harvard.edu
Harvard University
FAS IT Research Computing
Dept. Of Earth and Planetary Science


On Wed, May 27, 2009 at 12:05 PM, Prakash Velayutham <
prakash.velayutham at cchmc.org> wrote:

> Hi Matt,
> Thanks for the info. I have a quick question. I am just about getting
> started to do the same thing.
>
> Do you have your session DB area shared across the 3 access nodes? If yes,
> is that via NFS?
>
> Thanks,
> Prakash
>
> On May 27, 2009, at 11:58 AM, Matt Nicholson wrote:
>
> So, this is super-duper late, but, I have/admin a load balanced setup
> currently:
>
> Basically, we have a BIG cluster, as in 6000+ cores big. We have 3 user
> accessible access systems, that are access via a DNS round robin. SO, somone
> connect to xx.yy.zz, and they end up at either xx1,xx2,or xx3.yy.zz.
>
> We wanted to give users NX access to their sessions. /home and anumber of
> other filesystems are share between all nodes, so this was fairly simple.
> Since users could end up on any of the 3 systems, I did the following:
>
> xx2 is the "MASTER system", running nx, as a load balancer (just handing
> clients out randomly really).
> xx1 and xx3 forward any nx connection to xx2, where they are dealt with.
> this way if a user connect, runs on xx1, but then suspends, and alter
> connects and hits xx3, they will get sent back to the "master" system, where
> it finds their session and reconnects to teh right box.
>
> it works....fairly well. As with NX in general, lots of time has been spend
> tracking down little errors/issues (someone make a bad edit to their
> .bashrc, ssh logins work, but NX fails, etc). I'll be sending on issue we
> have to this list shrotly.
>
> So, there a breif overview of how we have it setup. Feel free to contact me
> for help/etc.
>
>
> Matthew Nicholson
>
>
>
> On Thu, Apr 23, 2009 at 6:12 PM, jhonyl <jhonyl at netscape.net> wrote:
>
>> Hi there,
>>
>> Is there some documentation about load balancing in freenx?
>>
>> If not could someone who does it give an overview?
>>
>> ________________________________________________________________
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>>
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>>
>>         Don't forget to check the NX Knowledge Base:
>>                 http://www.nomachine.com/kb/
>>
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>
> ________________________________________________________________
>     Were you helped on this list with your FreeNX problem?
>    Then please write up the solution in the FreeNX Wiki/FAQ:
>
> http://openfacts2.berlios.de/wikien/index.php/BerliosProject:FreeNX_-_FAQ
>
>         Don't forget to check the NX Knowledge Base:
>                 http://www.nomachine.com/kb/
>
> ________________________________________________________________
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>      https://mail.kde.org/mailman/listinfo/freenx-knx
> ________________________________________________________________
>
>
>
> ________________________________________________________________
>     Were you helped on this list with your FreeNX problem?
>    Then please write up the solution in the FreeNX Wiki/FAQ:
>
> http://openfacts2.berlios.de/wikien/index.php/BerliosProject:FreeNX_-_FAQ
>
>         Don't forget to check the NX Knowledge Base:
>                 http://www.nomachine.com/kb/
>
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