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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Yehiyam,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>You can read from different threads concurrently if each thread has its own, unique GDALDataset handle. That means call GDALOpen() from each thread on the same file path. Writing should be done from one thread. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Best regards,<o:p></o:p></p><p class=MsoNormal>Martin<o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> gdal-dev-bounces@lists.osgeo.org [mailto:gdal-dev-bounces@lists.osgeo.org] <b>On Behalf Of </b>Livneh Yehiyam<br><b>Sent:</b> Monday, December 24, 2012 7:04 AM<br><b>To:</b> gdal-dev<br><b>Subject:</b> [gdal-dev] Multithreaded GDAL<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hi all<o:p></o:p></p><p class=MsoNormal>I've tried searching for an answer online, but the most recent information I found is more than 3 years old.<o:p></o:p></p><p class=MsoNormal>We have method that reads pixels from one data-source, performs some manipulation, and writes it to another.<o:p></o:p></p><p class=MsoNormal>Reading is done with the Band.ReadRaster C# API. <o:p></o:p></p><p class=MsoNormal>Writing is done with the Band.WriteRaster c# API.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I'd like to process several data-sets in parallel on multiple threads. <o:p></o:p></p><p class=MsoNormal>From what I could understand from <a href="http://trac.osgeo.org/gdal/wiki/FAQMiscellaneous">http://trac.osgeo.org/gdal/wiki/FAQMiscellaneous</a> and other online sources, "no threads can be writing to GDAL while others are reading".<o:p></o:p></p><p class=MsoNormal>Has this changed in recent versions? Is it now possible to read and write on different threads (from different data-sets)?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks<o:p></o:p></p><p class=MsoNormal>Yehiyam<o:p></o:p></p><div class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><hr size=2 width="100%" align=center></span></div><p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>This message (including any attachments) issued by RAFAEL- ADVANCED DEFENSE SYSTEMS LTD. (hereinafter "RAFAEL") contains confidential information intended for a specific individual and purpose, may constitute information that is privileged or confidential or otherwise protected from disclosure. If you are not the intended recipient, you should contact us immediately and thereafter delete this message from your system. You are hereby notified that any disclosure, copying, dissemination, distribution or forwarding of this message, or the taking of any action based on it, is strictly prohibited. If you have received this e-mail in error, please notify us immediately by e-mail <a href="mailto:lawraf@rafael.co.il">mailto:lawraf@rafael.co.il</a> and completely delete or destroy any and all electronic or other copies of the original message and any attachments thereof. </span></i><i><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></i></p><div class=MsoNormal align=center style='text-align:center'><i><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><hr size=2 width="100%" align=center></span></i></div></div></body></html>