configure some clients to boot from fat image

Jonathan Carter (highvoltage) jonathan at
Thu Mar 24 14:22:30 UTC 2011

Hi Lee

On 03/22/11 13:45, Lee Harr wrote:
> I have a lab of computers running plain LTSP with thin clients.
> Some of the clients are more powerful "LTSP Term 1620"s which
> I thought I would try out as fat clients.
> They work pretty well as thins. Would you expect them to work
> any better as fat clients?
> I built the fat client image with these instructions:
> But I'm not sure how to have just those more powerful systems
> boot from the new image. (I don't want to move the fat image
> to /opt/ltsp, I want to leave it at /opt/ltsp-fat)
> So, am I modifying /etc/ltsp/dhcpd.conf ?
> Or is it something in /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/ ?
> Any hints appreciated.

If the stronger machines have more RAM, you could use FAT_RAM_THRESHOLD 
to specify which clients should run as fat and which thin. So in your 
lts.conf you could have something like:





In the above example, machiens above 512MB or RAM will start a fat 
client session. A machine with more than 512MB of RAM can be set to use 
a thin client session by using the LTSP_FATCLIENT directive.



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