Read that page - it only offers that option if it can store the hash of the
rendered tree in the file meta i.e. in exrs (otherwise it doesn't have
anything to check against).
J

On 8 July 2015 at 11:22, Igor Majdandzic <[email protected]> wrote:

>  Sorry but where is that option. I just got a read file knob thats all. Am
> I missing something? I certainly am.
>
>     Igor
>
>
> Am 08.07.2015 um 12:16 schrieb Jack Binks:
>
>  It's not that they're necessarily faster, it's that you get more manual
> control and may be better if you're happy to trade off the automagic
> cleaning of cache data, higher precision vs half float exr, and not needing
> to explicitly render you get with diskcache.
>
>  If you've got 'check file matches input' on it'll need to calculate the
> hash of the tree above to check it (see rest of article) - cheaper than
> figuring out the image but could still be doing work, so that might be what
> you're seeing. See if switching it off/using a non-hash-metadata writing
> format like dpx makes any difference, as perhaps that's it. Might explain
> why different script configurations see different times spent calculating.
> J
>
> On 8 July 2015 at 10:48, Charles Bedwell <[email protected]>
> wrote:
>
>>   That's quite interesting, thanks for posting it.
>>
>>  The author mentions that using read from write nodes as being a faster
>> and perhaps more efficient way of not recalculating upstream nodes than
>> using the diskcache node.
>>
>>  The issue I have is that it is not faster at all, upstream is still
>> being calculated and the read from write is completely ignored, and I'm
>> stuffed if I know why. If I make a dedicated read node and read that
>> sequence, connect it to the downstream it's fine. Plays back like
>> lightning. Putting a readfromwrite node in the stream does not seem to
>> function.
>>
>>  Charlie
>>
>>  On 8 Jul 2015, at 10:21 am, Jack Binks < <[email protected]>
>> [email protected]> wrote:
>>
>>     CAUTION EXTERNAL EMAIL
>>
>>
>>
>>
>>  This may be informative - there's a section on diskcache in particular,
>> but the rest is good to know if you haven't come across it before:
>>
>> http://major-kong.blogspot.co.uk/2012/11/all-your-cache-are-belong-to-us.html
>>
>>  J
>>
>> On 7 July 2015 at 15:04, Charles Bedwell <[email protected]>
>> wrote:
>>
>>>  Hi Daniel,
>>>
>>>  At the moment Nuke 9.05.
>>>
>>>  Elias, I rendered out, checked Read and pointed the viewer to that
>>> (exr render, check file matches input disabled) so the write/read is
>>> sitting at the bottom of the tree. Playback still awful (I can see the
>>> calculating keyframes or whatever it is window pop up briefly from a
>>> tracker above it).
>>>
>>>  The only thing that worked is to disconnect the tree and make a read
>>> node pointing to the render. Playback is fine as it's just playing back the
>>> exr seq.
>>>
>>>
>>>
>>>
>>>  On 7 Jul 2015, at 2:54 pm, Daniel Hartlehnert < <[email protected]>
>>> [email protected]> wrote:
>>>
>>>     CAUTION EXTERNAL EMAIL
>>>
>>>
>>>
>>>
>>> Hi,
>>>
>>>  i would be curious about this too. Because i expierenced the same
>>> behaviour in many Nuke versions and finally just gave in, thinking it just
>>> doesn't work.
>>> I'd be happy to hear other feedback though.
>>> What Nuke version are you using?
>>>
>>>  Cheers,
>>> Daniel
>>>
>>>  Am 07.07.2015 um 15:43 schrieb Charles Bedwell:
>>>
>>>  Hi,
>>>
>>>  Is there some secret to using the DiskCache node? I have a large node
>>> tree which I'm pretty much done with and would like to cache it so I don't
>>> have to render it during playback as it's rather slow.
>>>
>>>  I added a DiskCache node and clicked PreCache, but when I scrub my
>>> timeline the nodes above it flash yellow as if they are processing. I
>>> haven't changed the zoom level or otherwise changed anything. This is with
>>> the viewer looking at the diskcache node.
>>>
>>>  Am I doing something wrong?
>>>
>>>
>>>
>>>
>>> *CHARLES BEDWELL*
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