Hi Jens, in the fio man-page you are writing: "Even async engines my impose OS restrictions causing the desired depth not to be achieved.This may happen on Linux when using libaio and not setting direct=1, since buffered IO is not async on that OS." (there's also a typo, I think it should be "may" instead of "my") Nevertheless it is possible to use fio with libaio and buffered IO: $ fio --rw=write --name=test --size=20M --runtime=60 --time_based --iodepth=64 --ioengine=libaio [...] IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.2%, 16=0.3%, 32=0.6%, >=64=98.8% Could you point out the limitations that come up with libaio<->buffered IO (page cache)? Thanks, Georg -- : Georg Schönberger : Web Operations & Knowledge Transfer : Thomas-Krenn.AG | The server-experts : http://www.thomas-krenn.com | http://www.thomas-krenn.com/wiki -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
