The same thing..
To get full load of all cores we usually split our`s sequence in to several
chunks and render them simultaneosly via background render..  but with this
setup you can easily exceed your RAM limit.. so  for heavy sequences we
split in to small amount of simultaneous renders or even 1.
But if sequence is "light-weighted"  we split up in to 5 simultaneous tasks
on each render-station.
You can see what i`m talking about on attached image.

for example.. [image: Inline images 1]



On 5 December 2012 19:13, Neil Scholes <[email protected]> wrote:

> Hi Peter - thanks
>
> Yes ext4
>
> ok with your suggested setup - i get half of the cores being used ( 8
> threads out of 16) - and out of that half - only one of the threads is
> using a full 100% - the rest are down by around 10%
>
> This sound right?
>
>
>
> Neil Scholes
>
> www.uvfilms.co.uk
> +44 (0) 7977 456 197
>
> On 05/12/12 14:48, Peter Pearson wrote:
>
>> On 05/12/12 14:39, Neil Scholes wrote:
>>
>>> ok -
>>>
>>> im reading off my local raid 0 drive - which is fast enough to play back
>>> 2k DPX realtime.
>>>
>>> But Im also rendering to that disc also.. is this the issue perhaps?
>>>
>>
>> Most probably depending on what disk buffering is set up - I'm guessing
>> the file system is ext4?
>>
>> Best test is to use a new Nuke script, 4k checkerboard -> defocus node
>> (with defocus set to 60 or something), view that in fullscreen and see if
>> it uses more cores then.
>>
>> That eliminates disk IO completely.
>>
>> If it's still not using all the cores, put the mouse over the DAG and
>> press x, then type "[set threads]" (without the quotes) and press OK.
>>
>> It should return a message box with: Syntax error at "x", where x is the
>> number of threads Nuke is configured to use.
>>
>> Check that with how many cores you've got.
>>
>> Cheers,
>> Peter
>>
>
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<<image.jpeg>>

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