Help! Would you recommend running ltsp on Ubuntu 8.04 or 8.10?

Tue Feb 17 20:45:01 GMT 2009

On Tue, Feb 17, 2009 at 11:25 AM, Jordan Erickson
<jerickson at logicalnetworking.net> wrote:
> Hey John,
>
> I run 8.04.2 (i386) on servers with half as much ram as yours, and
> haven't had any showstopping issues like what you're describing. I ran
> into issues with the 64-bit server, but that was back in the Edgy/Fiesty
> days, and I'm sure most of them have been fixed by now. It was also not
> performance related.
>
> Is your server NIC recognized at its full capacity (hopefully
> 1Gbit/sec)? Use 'ethtool' to find out. You're using the -server kernel
> right? Also, let us know about any customizations, including nbd swap,
> any lts.conf parms, etc.
>

sudo ethtool eth5
Settings for eth5:
	Supported ports: [ TP ]
	Supported link modes:   10baseT/Half 10baseT/Full
	                        100baseT/Half 100baseT/Full
	                        1000baseT/Full
	Supports auto-negotiation: Yes
	Advertised link modes:  10baseT/Half 10baseT/Full
	                        100baseT/Half 100baseT/Full
	                        1000baseT/Full
	Advertised auto-negotiation: Yes
	Speed: 1000Mb/s
	Duplex: Full
	Port: Twisted Pair
	PHYAD: 0
	Transceiver: internal
	Auto-negotiation: on
	Supports Wake-on: umbg
	Wake-on: d
	Current message level: 0x00000007 (7)
	Link detected: yes

Settings for eth6:

	Supported ports: [ MII ]
	Supported link modes:   10baseT/Half 10baseT/Full
	                        100baseT/Half 100baseT/Full
	                        1000baseT/Full
	Supports auto-negotiation: Yes
	Advertised link modes:  10baseT/Half 10baseT/Full
	                        100baseT/Half 100baseT/Full
	                        1000baseT/Full
	Advertised auto-negotiation: Yes
	Speed: 100Mb/s
	Duplex: Full
	Port: MII
	PHYAD: 17
	Transceiver: external
	Auto-negotiation: on
	Supports Wake-on: g
	Wake-on: d
	Link detected: yes

My syslog is peppered with things like this:

syslog.4.gz:Feb 12 12:05:20 192.168.0.215 kernel: [1218745.977736]
end_request: I/O error, dev nbd0, sector 200128
syslog.4.gz:Feb 12 12:05:20 192.168.0.215 kernel: [1218745.977748]
end_request: I/O error, dev nbd0, sector 200130
syslog.4.gz:Feb 12 12:05:20 192.168.0.215 kernel: [1218745.977760]
end_request: I/O error, dev nbd0, sector 200132
syslog.4.gz:Feb 12 12:05:20 192.168.0.215 kernel: [1218745.977772]
end_reques] end_request: I/O error, dev nbd0, sector 200120
syslog.4.gz:Feb 12 12:05:20 192.168.0.215 kernel: [1218745.981573]
end_request: I/O error, dev nbd0, sector 200176
syslog.4.gz:Feb 12 12:05:20 192.168.0.215 kernel: [1218745.981633]
SQUASHFS error: sb_bread failed reading block 0x186f9
syslog.4.gz:Feb 12 12:05:20 192.168.0.215 kernel: [1218745.981638]
SQUASHFS error: Unable to read page, block 61b69d0, size 7bf4
syslog.4.gz:Feb 12 12:05:20 192.168.0.215 kernel: [1218745.981664]
end_request: I/O error, dev nbd0, sector 200118
syslog.4.gz:Feb 12 12:05:20 192.168.0.215 kernel: [1218745.981673]
nbd0: Attemp] end_request: I/O error, dev nbd0, sector 200134
syslog.4.gz:Feb 12 12:05:20 192.168.0.215 kernel: [1218745.982666]
end_request: I/O error, dev nbd0,] end_request: I/O error, dev nbd0,
sector 200138
syslog.4.gz:Feb 12 12:05:20 192.168.0.215 kernel: [1218745.985782]
end_request: I/O error, dev nbd0, sector 2001

However I don't know if this is users shutting down the thin clients
incorrectly or part of the problem I am chasing.

Thanks for any ideas.

John

>
> Cheers,
> Jordan/Lns
>
>
> john wrote:
>> Hi all,
>>
>> I've been trying to migrate from 7.04 to 8.04 since last fall. I can
>> only do it during downtime at our school. I have this week while kids
>> are on break to try and get the new system in.  My problem is that  I
>> can't seem to scale the LTSP installation based on 8.04 past 6-8 thin
>> clients before the server crashes. The server is running 16 gigs ram/
>> AMD 64 image with Ntavo 6030 thin clients each with 512M ram. The thin
>> clients are rolled with the i386 image.
>>
>> I can't find anything in the logs that shows me where the problem
>> lies.  I've been running 7.04 successfully for a couple of years now
>> so I feel like the problem lies with 8.04 somewhere. I am trying to
>> decide whether to can 8.04 and begin working on 8.10.  Or perhaps
>> retry 8.04 under 32 bit with the Server-Image kernel for larger memory
>> support. Can any one give me some guidance? Did you make 8.04 work
>> just fine (if so did you do it under 32 or 64) or did you end up going
>> for the latest and the greatest?  All things being equal I'd prefer to
>> run 8.04 since it'll be supported till 2011.
>>
>> Thanks for any advice.
>>
>> John
>>
>>
>
>
> --
> Jordan Erickson
> Owner, Logical Networking Solutions
> http://www.logicalnetworking.net
> 707-636-5678
>
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