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

[Zack Gold]

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
>>
>>> [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).
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
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>>>>>>>
>>>>>>
>>>>>> _______________________________________________
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>>>>
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>>>
>>> --
>>>
>>> "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
>>>
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>>
>>
>>
>> Links:
>> ------
>> [1]
>> http://stackoverflow.com/questions/21617500/
>> understanding-load-average-vs-cpu-usage
>> [2] http://nblug.org/cgi-bin/mailman/listinfo/talk
>>
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>> http://nblug.org/cgi-bin/mailman/listinfo/talk
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