Messages in this thread | | | Date | Wed, 11 Jan 2006 12:23:44 -0600 (CST) | From | David Lloyd <> | Subject | Re: Is user-space AIO dead? |
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On Wed, 11 Jan 2006, Kenny Simpson wrote:
> 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?
Wouldn't nonblocking I/O on regular files be nice?
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