[FreeNX-kNX] nxserver loadbalance.

Alastair Johnson alastair at solutiontrax.com
Fri Apr 13 14:11:33 UTC 2007


> Yes, there are many ways to accomplish load balancing between nxserver(s)
> and nodes. For example the simplest is to use the built in functions in
> freenx for load balancing and you will have a central nxserver which
> balances connections and sessions between many nodes. But be ware that in
> this setup every connection that you have <client-nxserver-nxnode> will go
> through this load balancer nxserver (check usage of netcat command in
> nxserver). That means if this server fails for some reason (hard disk
> crash, network problems) everything will fail - sessions will crash,
> session info lost, no connection between nodes and clients, etc. Thus this
> is only for load balancing but not for high availability. If you want to
> make a good cluster then you need at least:
> - a central storage for session information (nfs, mysql, etc.)
> - 2 or more nxservers or a little more intelligent nxclient with built load
> balance algorithm and nxserver working on every node
>
> We have mange to make this kind of solution for our company and it has
> mysql storage for session info, load balance algorithm built in nxclient,
> and nxserver on every nxnode. Upon connection nxclient checks which is the
> least loaded server and connects directly to nxserver on it so when trying
> to resume session later it will connect you to the one that has your
> session.
>
> Another solution is to use openMosix but I haven't try it so I'm not sure
> how to do it.
>
> If you are interested I can give you more detail of the whole setup.

I'm interested in how this is done, though I don't have an immediate use for 
it.

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