Interesting: http://www.centos.org/docs/4/html/rh-gfs-en-6.1/s1-manage-direct-io.html
> -------Original Message------- > From: Ethan Alpert <[email protected]> > To: [email protected] > Subject: [gdal-dev] Can GDAL be configured to do direct I/O? (bypass cache, > control blocksize, etc) > Sent: Dec 14 '12 09:14 > > Im running in to a situation where I believe the filesystem cache > settings are screwing things up. Based on iozone tests Im 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. > Im still trying to figure this out but I can now get these machines > to tip over with just iozone. > > > Im actively working on how to refactor this code base to use GDAL > WriteBlock but in absence of a solution there Im wondering if > theres 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. > -------------------- > _______________________________________________ > gdal-dev mailing list > [LINK: [email protected]] [email protected] > [LINK: http://lists.osgeo.org/mailman/listinfo/gdal-dev] > http://lists.osgeo.org/mailman/listinfo/gdal-dev _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
