This is something I'll be working on in the LTSP Howto I'm writing. 
I've already got it sketched out, now just have to write it up.

Ken McCord


Derek Dresser wrote:
> 
> Quoting Jeff Roberts <[EMAIL PROTECTED]>:
> 
> > I currently have a ltsp server version 2.08pre2 serving gnome desktops
> > for about 20 desktops. the server is a dual pII-400 with 1 gig of ram
> > and scsi drives.  We have run this configuration for about a year with
> > almost no problems.  We only run netscape, ssh and the citrix client on
> > it.
> >
> > I would like to give version 3 a try and I would also like to run the
> > lastest versions of abiword, gnumeric, evolution, and galeon on the
> > server.
> >
> > I really dont want to mess up a working server, and I am also concerned
> > that the increased application load could cause problems.  I have a dual
> > p2-300 box available.
> >
> > What I would like to do is :
> > 1.  Load the spare box with redhat 7.2, the latest release of ltsp, and
> > ximian gnome.
> > 2.  Then move a few users from the other ltsp server to the newer
> > release.
> > 3.  After I am comfortable, I could then take the old box and install
> > the same setup on it. Then load balance (manually I suppose) between the
> > two servers.
> >
> > I would like to know if this is the best solution, and what the best
> > configuration would be.  The existing server is also the dhcp server.
> >
> > Is it possble to run dhcp on both ltsp servers and just include entries
> > in each server's dhcp.conf for the terminals I want to boot off each
> > respective server?
> >
> Jeff,
> I've been giving this some though lately myself.  I'm thinking about load
> balancing and redundancy.  My LTSP setup is very stable, but catastrophes
> do happen, and if that server goes down, the whole world is down.
> 
> For load balancing, there are two options I am thinking about.
> 1. MOSIX clustering (www.mosix.org) - this will transparently migrate
> processes from server to server (or workstation) to balance the load over
> the available resources.  This seems like a cool way to do it because it
> will spread the load accross multiple boxes automagically.
> 
> 2. Application servers - In this scenario, you could leave your current
> stable server running as is (hey, if it ain't broke....), and just use rsh
> or ssh to run the additional software on the new box.  You could add links
> to the users desktops with the rsh or ssh commands ready to go.  The
> extreme case of this would be to set up a server for each application (star
> office server, mozilla server, etc.)
> 
> I'm looking for ideas to provide redundancy, so if my main login server
> goes down, users could simply log in again to a secondary server.  I've
> been looking at using the XDM chooser to allow users to choose between
> login servers based on load, but ideally, the users wouldn't have to know
> that there were multiple servers, they would just log in again and keep on
> truckin'.  Any ideas?
> 
> As for the dhcp server, you would really only need to run the dhcp server
> on one machine and then just set the server option to the appropriate
> machine to boot from.
> I think the dhcp option is
> next-server    192.168.0.254
> 
> Thanks,
> Derek
> 
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