Hi Daniele,
After turning on verbose logging, I did see that those black images are coming
back black as it think they are “No Data” values. I’m running GeoServer on SuSE
Linux with 32 cores and 128GB of RAM. My image mosaic layer is configured with
USE_JAIR_IMAGEREAD=false and allowMultithreading=true. Since in the log I saw
“No Data”, I turned on input and output transparency in the layer configuration
and now my world image seems to show up fine. It was a bit misleading because
the world image tiles weren’t supposed to overlap each other and the fact that
it only happened in one side of the world was misleading too.
Is the default stacking order of the image mosaic layer by fid?
Thanks,
Danny
From: [email protected] [mailto:[email protected]] On Behalf Of
Daniele Romagnoli
Sent: Tuesday, February 03, 2015 1:12 AM
To: Danny Cheng
Cc: [email protected]
Subject: Re: [Geoserver-users] Image Mosaic w/ Large Amount of Granules
Hi Danny,
A couple of questions to better understand your issue:
- Did you see any log message for those black images?
- Can you provide some more info about your system configuration? (OS at least).
When you do very zoomed out request (as you want to see the whole word in a
single view) the imageMosaic have to read all the granules involved at that
level (so it has to read 2100 files). If your layer is configured to use JAI
imageRead (USE_JAI_IMAGEREAD = true), then it may run out of file descriptors.
Indeed, JAI ImageRead may keeps a lot of files open due to its deferred
execution loading. Switching this parameter to false will let the ImageMosaic
use immediate (in memory) read operations which means: open the file -> read
what it needs -> close the file. You may also consider set allowMultithreading
= true, which performs those read operations concurrently, using the configured
Thread pool executor (see the Settings -> Coverage Access configuration page).
However, since your mosaic is made of a big number of files you may also
consider setting up an Image Pyramid on top of it.
Please, let us know.
Best regards,
Daniele
==
GeoServer Professional Services from the experts! Visit
http://goo.gl/NWWaa2 for more information.
==
Ing. Daniele Romagnoli
Senior Software Engineer
GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
http://www.geo-solutions.it
http://twitter.com/geosolutions_it
-------------------------------------------------------
AVVERTENZE AI SENSI DEL D.Lgs. 196/2003
Le informazioni contenute in questo messaggio di posta elettronica e/o nel/i
file/s allegato/i sono da considerarsi strettamente riservate. Il loro utilizzo
è consentito esclusivamente al destinatario del messaggio, per le finalità
indicate nel messaggio stesso. Qualora riceviate questo messaggio senza esserne
il destinatario, Vi preghiamo cortesemente di darcene notizia via e-mail e di
procedere alla distruzione del messaggio stesso, cancellandolo dal Vostro
sistema. Conservare il messaggio stesso, divulgarlo anche in parte,
distribuirlo ad altri soggetti, copiarlo, od utilizzarlo per finalità diverse,
costituisce comportamento contrario ai principi dettati dal D.Lgs. 196/2003.
The information in this message and/or attachments, is intended solely for the
attention and use of the named addressee(s) and may be confidential or
proprietary in nature or covered by the provisions of privacy act (Legislative
Decree June, 30 2003, no.196 - Italy's New Data Protection Code).Any use not in
accord with its purpose, any disclosure, reproduction, copying, distribution,
or either dissemination, either whole or partial, is strictly forbidden except
previous formal approval of the named addressee(s). If you are not the intended
recipient, please contact immediately the sender by telephone, fax or e-mail
and delete the information in this message that has been received in error. The
sender does not give any warranty or accept liability as the content, accuracy
or completeness of sent messages and accepts no responsibility for changes
made after they were sent or for other risks which arise as a result of e-mail
transmission, viruses, etc.
On Tue, Feb 3, 2015 at 12:33 AM, Danny Cheng
<[email protected]<mailto:[email protected]>> wrote:
Hi,
I have an image mosaic layer with around 2100 granules that covers the whole
world. Through testing, I realized that not all of my granules being displayed
properly. The granules that aren’t displayed properly are returned from
GeoServer as black images. If I make a smaller image mosaic layer with 30
granules in the region that was returning black images by GeoServer, this time
around GeoServer is sending back the actual images correctly. Is there a
recommended image mosaic configuration for large amount of granules? I tried
setting the MaxAllowedTiles in the layer configuration, but that didn’t seem to
fix my problem.
Thanks,
Danny
------------------------------------------------------------------------------
Dive into the World of Parallel Programming. The Go Parallel Website,
sponsored by Intel and developed in partnership with Slashdot Media, is your
hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/
_______________________________________________
Geoserver-users mailing list
[email protected]<mailto:[email protected]>
https://lists.sourceforge.net/lists/listinfo/geoserver-users
------------------------------------------------------------------------------
Dive into the World of Parallel Programming. The Go Parallel Website,
sponsored by Intel and developed in partnership with Slashdot Media, is your
hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/
_______________________________________________
Geoserver-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/geoserver-users
