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]> 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*
>  Compositor, Encore London
>  142 Wardour Street, London, W1F 8DD
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