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

[Omar Eljumaily]

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 
> <mailto: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
>     <mailto: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
>     >>
>     >>
>     >> 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
>     <mailto: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).
>     >>>
>     >>>
>     >>>
>     >>>
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