I'm running in to a situation where I believe the filesystem cache settings are screwing things up. Based on iozone tests I'm not getting near the throughput I should for large 4gb+ files with multiple writing processes. It is a complex interaction of the number of dirty pages in filesystem cache in combination with small blocksize of the filesystem. I'm still trying to figure this out but I can now get these machines to tip over with just iozone.
I'm actively working on how to refactor this code base to use GDAL WriteBlock but in absence of a solution there I'm wondering if there's anyway to get GDAL writing using O_DIRECT? Thanks, -ethan This electronic communication and any attachments may contain confidential and proprietary information of DigitalGlobe, Inc. If you are not the intended recipient, or an agent or employee responsible for delivering this communication to the intended recipient, or if you have received this communication in error, please do not print, copy, retransmit, disseminate or otherwise use the information. Please indicate to the sender that you have received this communication in error, and delete the copy you received. DigitalGlobe reserves the right to monitor any electronic communication sent or received by its employees, agents or representatives.
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