[PLUG] non-buffered I/O in Linux?

Paul Heinlein heinlein at attbi.com
Tue Jun 4 06:20:04 PDT 2002


On Mon, 3 Jun 2002, Alex Daniloff wrote:

> Does somebody know if Linux kernel allows to perform non-buffered
> I/O on raw disk partitions? In documentation on InnoDB tables it
> said: By using a raw disk you can on some Unixes perform unbuffered
> I/O. I assume that it should improve DB performance. Thank you in
> advance for any thoughts or sources of information. Alex

This article might interest you:

  http://www.linuxjournal.com/article.php?sid=5841

Among the interesting quotes:

    For database creation, loading and indexing, Figure 3 shows that 
    the ext3 filesystem wins hands down and that RAW devices come in
    next to last place.

--Paul Heinlein <heinlein at attbi.com>





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