8.04 ltsp +slow

[Jordan Erickson]

Uwe,

I just got back from a site and noticed a few things regarding NBD_SWAP 
and the ltsp-client-setup script that lives in /etc/init.d in the 
chroot. I have no idea if this is related, but it *does* hang the server 
(and bootup of clients) when NBD_SWAP = True, the chroot is updated with 
hardy-updates (which fixes the NBD port bug and gets it going in the 
first place) at:

---
Setting up LTSP client...
Negotiation:
---

Upon looking in 'top' on the server, there are a few 'dd' processes 
running, which I assume are creating swap files in /tmp on the server. 
I'm not sure though. Here's my IRC log, just to give more information 
(Thanks Ryan for the help btw, you nailed a syntax bug in the script):

http://lns.wikidot.com/randomnotes

Whoever takes care of the ltsp-client-setup script should probably fix 
that quote issue. Possibly our whole issue with NBD_SWAP lies in this 
script as well... ?


Cheers,
Jordan



Uwe Geercken wrote:
> hello friends,
>
> I have a similar problem. I have re-installed the server. I went to  
> 8.04 and at the same time implemented software raid to our server  
> which had been running several month in our local school.
>
> now when the server starts the following happens: the first client  
> that boots is really fast. the second one is visibly slower. all other  
> clients (all the same) don't boot anymore after that. we are alone on  
> the network: just the edubuntu server and 15 clients.
>
> when I shutdown the clients and reboot the server and then start  
> different clients, I experience the same problem. also maybe I should  
> add, that with the previous version we did not experience these  
> problems.
>
> when I try to boot several clients as described above and then go to  
> the server, I noticed that the server is really slow: even entering  
> the root password on the console takes forever.
>
> hope somebody can help me. it is rather urgent, as I have to start  
> classes 6 days from today and the kids (11 years old) want to fell and  
> see some linux and I really don't want to disappoint them.
>
> tks.
>
> uwe
>
>
>
>
>
>
> Zitat von Jordan Erickson <jerickson at logicalnetworking.net>:
>
>   
>> Ken,
>>
>> Have you looked at 'top' to see if there are any processes hoggging the
>> CPU? Have you looked through logfiles on the server/clients? Are you
>> logging in & launching applications, or simply stopping when they get to
>> an LDM login prompt?
>>
>> Have you updated your chroot?
>>
>>
>> Cheers,
>> Jordan
>>
>>
>> Ken Campbell wrote:
>>     
>>> Hi to all,
>>>
>>> I have new setup 8.04ltsp Hardy
>>>
>>> 16 clients all have:
>>> 1.8gig celeron, 512 M ram. Intel PXE gigabyte NIC,
>>> Cisco gigabit switch
>>>
>>> Server is 2.113 G Hp Xeon with 160 gig sata, 4 gig ram, two gigabit nics.
>>>
>>> Have not done any configuration to ltsp.
>>> Clients are very slow. After a handful boot ok, everything slows down.
>>> Performance is terrible.
>>> Given hardware of server and clients, what is making this setup so slow for
>>> clients?
>>> What steps have I not done?
>>>
>>> TIA
>>>
>>>
>>>
>>> Kenneth Campbell
>>>
>>>
>>>
>>>       
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>>     
>
>
>
>