[NBLUG/talk] thought I'd ask here also - Anyone have any experience with LTSP?

[gandalf at sonic.net]

Hmmm, top says it's been up 25 days.

On 2015-01-23 17:46, Zack Gold wrote:
> RX bytes:592148079085 (592.1 GB)  TX bytes:3887567471905 (3.8 TB)
> 
> Holy smokes, Gandalf!
> On Jan 23, 2015 7:37 PM, <gandalf at sonic.net> wrote:
> 
>> As I understand it everything is run from the server and the
>> x.window video is simply sent to the client. It's rather like
>> running a bunch of remote sessions such as with VNC. It's designed
>> for use on low budget devices and old systems, 400mhz or so. I'm
>> sure if I could offload some of that from the sever to the client
>> the issues would disappear.
>> 
>> On 2015-01-23 16:17, Omar Eljumaily wrote:
>> I thought about this a bit more.  I think that it could any of
>> several different non-CPU, non-Memory resource issues including:
>> 
>>  1. Display rendering if it's using hardware (graphics card) to
>> render.
>>  2. Disk IO
>>  3. Network IO
>>  4. Network bandwidth.
>>  5. Others???
>> 
>> On 1/23/2015 4:11 PM, Steve S. wrote:
>> 
>> Just a sudden thought... might a NIC be mis-set to a slow speed,
>> causing all sorts of funky backups, mis-queueing,
>> context-switching,
>> etc...?
>> 
>> On Fri, Jan 23, 2015 at 4:00 PM, Jordan Erickson
>> <jerickson at logicalnetworking.net> wrote:
>> 
>> Can you give us a bit more detail as to your network/server setup?
>> You
>> say you're running 24cpus and 128gigs. Might be a logical
>> explanation to
>> house NFS on its own server.. What's your network speed? Thin (or
>> fat)
>> client specs? Distro?
>> 
>> Cheers,
>> Jordan
>> 
>> On 01/23/2015 03:52 PM, gandalf at sonic.net wrote:
>> It's actually a NFS to a separate server. I'm not sure why it
>> was done
>> that way. To me this would probably further congest the network
>> while
>> not being nearly as fast as a high performance direct disk
>> interface.
>> 
>> On 2015-01-23 15:00, Omar Eljumaily wrote:
>> Not speaking from experience with LTSP server, but my guess
>  would be
> 
>>> that it is a disk io bottleneck.
> 
> 
> http://stackoverflow.com/questions/21617500/understanding-load-average-vs-cpu-usage
> [2]
> 
>> [1]
>> 
>> I believe that web browsers cache on disk most of their
>  content and
> 
>>> media before rendering it.  That's a lot of users hitting a
>  single
> 
>> disk drive or array.  Do you have a large RAID array?  SSD?
>> 
>> Omar
>> 
>> On 1/23/2015 2:19 PM, gandalf at sonic.net wrote:
>> 
>> I'm seeing very high load averages with low CPU usage. The
>  two main
> 
>> culprits are chrome and firefox. I've got about a hundred
>  users
> 
>> sharing the LTSP server which has some rich resources (24cpus
>  and
> 
>> 128gigs).
>> 
>> _______________________________________________
>> talk mailing list
>> talk at nblug.org
>> http://nblug.org/cgi-bin/mailman/listinfo/talk [1] [2]
>> 
>> _______________________________________________
>> talk mailing list
>> talk at nblug.org
>> http://nblug.org/cgi-bin/mailman/listinfo/talk [1] [2]
>  _______________________________________________
>  talk mailing list
>  talk at nblug.org
>  http://nblug.org/cgi-bin/mailman/listinfo/talk [1] [2]
> 
>  _______________________________________________
>  talk mailing list
>  talk at nblug.org
>  http://nblug.org/cgi-bin/mailman/listinfo/talk [1] [2]
> 
>  --
> 
>  "When I became a man I put away childish things, including the fear
>  of childishness and the desire to be very grown up."      -CS
>  Lewis
> 
>  _______________________________________________
>  talk mailing list
>  talk at nblug.org
>  http://nblug.org/cgi-bin/mailman/listinfo/talk [1] [2]
> 
>  Links:
>  ------
>  [1]
> 
> http://stackoverflow.com/questions/21617500/understanding-load-average-vs-cpu-usage
> [2]
>  [2] http://nblug.org/cgi-bin/mailman/listinfo/talk [1]
> 
>  _______________________________________________
>  talk mailing list
>  talk at nblug.org
>  http://nblug.org/cgi-bin/mailman/listinfo/talk [1]
>  _______________________________________________
>  talk mailing list
>  talk at nblug.org
>  http://nblug.org/cgi-bin/mailman/listinfo/talk [1]
> 
> 
> Links:
> ------
> [1] http://nblug.org/cgi-bin/mailman/listinfo/talk
> [2]
> http://stackoverflow.com/questions/21617500/understanding-load-average-vs-cpu-usage
> 
> _______________________________________________
> talk mailing list
> talk at nblug.org
> http://nblug.org/cgi-bin/mailman/listinfo/talk