Consensus seems to be building Hardy Heron slow as molasses

Jonathan Carter jonathan at ubuntu.com
Sun May 4 12:14:52 BST 2008


Hi Kai

Kai Wollweber wrote:
> One problem is performance. Login is somewhat slow but acceptable. The windows 
> on the client behave different: terminal windows react quickly, but other 
> windows, e.g. from open office or firefox are slow. I did not observe this on 
> LTSP 4.2. Could it be an effect of ssh on clients with small cpus?  

The reason why LTSP 5 is slower than LTSP 4.2 by default is the enhanced 
security. All the sessions that run on all the clients are encrypted 
over the network, mostly so that people won't listen in on your 
connection if they have access to your physical network.

You can disable the encryption, which will give you just about the same 
performance as in LTSP 4.2 (although at a security trade-off), by adding 
the following to the default section in your lts.conf:

   DIRECTX=true

HTH

-Jonathan




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