On Mon, 2005-09-26 at 10:13 +0100, vikas gupta wrote:
> hi sebastien,
>
> >
> >> Have a look at:
> >>
> http://www.bullopensource.org/posix/Bench/sysbench->oltp/sysbench.html
> >> for benchmarks using Sysbench and MySQL.
>
> I think this link is broken as it is not working ...
> Can you please check it ....
It's working but your mail client may have broken down the url.
Start at http://www.bullopensource.org/posix/ and follow the
Sysbench - oltp link under Benchmark results.
>
> >> > 2.1) aio_read/aio_write is supported but what
> >> > limitation are there
> >>
> >> Supported but without notification (SIGEV_NONE
> >> only).
>
> Can you please tell whether kernel behaves
> asynchronously for read operation without O_DIRECT
> MACRO's ???
Without any of the patches you need to use O_DIRECT
and aligned buffers, size and offset.
Buffered AIO is implemented by Suparna's patches.
>
> > > 4) Is there any test program that can measure
> > > efficiency for both glibc and libposix
> > implementation
> >
> > I personally use Sysbench and have compiled 3
> > MySQL servers,
> > one with librt AIO, one with libposix-aio and one
> > with MySQL
> > native simulated AIO.
> >
> > You may also try iozone.
>
> Can you please tell which one is better among three
> that you have tested
It depends on what you want to benchmark. Typically, Sysbench
in oltp mode mimics database use.
>
> 4) Is there any simple procedure to test the above
> mentioned library packages ???
For POSIX conformance, have a look at the Open POSIX
Test Suite at http://posixtest.sourceforge.net/
Sébastien.
--
------------------------------------------------------
Sébastien Dugué BULL/FREC:B1-247
phone: (+33) 476 29 77 70 Bullcom: 229-7770
mailto:[email protected]
Linux POSIX AIO: http://www.bullopensource.org/posix
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