Hi Andrea, thanks for your answer !
Le 04/10/2018 à 13:05, Andrea Aime a écrit :
do you have the "use JAI ImageRead" parameter turned on? (it is by default)
In that case the read is deferred, happens when the JAI chain starts
pulling tiles, so you see also the data reading
as part of the image processing time.
I have AllowMultiThread = true and USE_JAI_IMAGEREAD = false.
I had seen this suggestion in many blogs / threads so it is the first
one that I applied.
Side note, LZW decompression is awfully slow, if you want to use
lossless compression I'd suggest to switch to DEFLATE instead
Thanks for the advice.
Unfortunately it is an old dataset of nearly 1 million rasters, and the
actual backend use to stich them together (closed source dll build on
who knows what) does not support many options. I'm switching from that
to GeoServer, but I'd like to keep the same performance.
I already managed to get a small improvement by setting priority to 10
in JAI. Not the best, but OK anyway.
Regards
--
Arnaud
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