Loadbalancer's don't necessarily have to have anything to do with x2go or NX for that matter although they can implement their own technique.

There are several good articles out there on the topic including this one<http://1wt.eu/articles/2006_lb/> .

Here is one implementation <http://haproxy.1wt.eu/> you could also use.

And here is a HowToForge article on setting up an Apache Web Server load balancer<http://www.howtoforge.com/high_availability_loadbalanced_apache_cluster>

If you use some of the "cloud" services setting up a load balancer is often very simple.

On the Amazon Web Services (AWS) Cloud (ec2) you just start your "instance" that is the application(s) you want to use and more or less a single click/command adds your new server to an EC2 loadbalance<http://aws.amazon.com/elasticloadbalancing/>r that you then can specify criteria for. AWS has made it ridiculously simple.

Matter of fact, AWS EC2 just implemented a new "service" which can track which instance (re virtual machine) a session belonged to and IF the session terminates abnormally, you can restart it and between the Load Balancer and AWS EC2 it will reattach it to the original instance/machine. Read about it hear on How to setup a Load Balancer with Sticky Sessions<http://www.shlomoswidler.com/2010/04/elastic-load-balancing-with-sticky-sessions.html>. Jeff Barr is the author and works for AWS.

Brian Mullan

On Mon, May 24, 2010 at 6:00 AM, <x2go-dev-request@lists.berlios.de> wrote:

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Today's Topics:

1. x2go servers with load balancing (michel)
2. Re: Does X2GO have support for scanning using a client-side scanner? (rupi)

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Message: 1 Date: Sun, 23 May 2010 13:59:12 +0200 From: michel <kamerun@immerda.ch> To: x2go-dev@lists.berlios.de, kamerun@immerda.ch Subject: [X2go-dev] x2go servers with load balancing Message-ID: <4BF91890.5070800@immerda.ch> Content-Type: text/plain; charset=ISO-8859-1; format=flowed

hello,

i use x2go with ubuntu and it works good, now i would like to install 2 x2go lenny servers woth load-balancing. i don't use ldap, is it like this that we must just install 2 machines with the same configuration it means we have 2 dhcp server with the same ip or we must configure somewhere something to have load balancing? i try to find out in the documentation, but i did not found.

michel

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Message: 2 Date: Sun, 23 May 2010 15:31:34 +0200 From: rupi <rupi@rantanplan.org> To: x2go-dev@lists.berlios.de Subject: Re: [X2go-dev] Does X2GO have support for scanning using a client-side scanner? Message-ID: <20100523133134.GE19269@rantanplan.org> Content-Type: text/plain; charset="us-ascii"

Hi,

after a quick look in the saned documentation[1] i think setting up saned on the clients and usinging sane with the sane-net backend shouldn't be that hard (though it requires a trusted network environment because there is no authentication/authorization besides tcp wrapper support..). You may want to tweak the users environment to set SANE_NET_HOSTS to her/his client pc.

Including tunneling support over ssh in x2go for saned is probably a tricky thing since sane uses a different tcp connection or control and data plus it resolves the port exclusivly over services.

But saned on the clients should ease the process for your users.

/rupi

1: http://www.sane-project.org/docs.html

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