Messages in this thread | | | Date | Wed, 11 Jan 2006 10:12:52 -0800 (PST) | From | Kenny Simpson <> | Subject | Is user-space AIO dead? |
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Hi, Having read the excellent paper by IBM presented at the 2003 OLS about Asynchronous I/O Support in Linux 2.5, I found the conclusion rather disappointing: "In conclusion, there appears to be no conditions for raw or O_DIRECT access under which AIO can show a noticable benefit." - p385. http://archive.linuxsymposium.org/ols2003/Proceedings/All-Reprints/Reprint-Pulavarty-OLS2003.pdf
Is this still the case?
If I want a transactional engine (like a database) that needs to persist to stable storage, is it still best to use a helper thread to do write/fsync or O_SYNC|O_DIRECT?
-Kenny
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