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Date: Tue, 14 Aug 2012 18:40:30 +0100
From: Bruce Cran <bruce@cran.org.uk>
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Subject: Re: "Invalidate" not functional on Windows?
References: <CAHaS=QzLW_CcDATeZnWXPEiVEGRJr9UHdohyJo53M4pp+hh27g@mail.gmail.com> <CAHaS=Qw-2ZvfvhyAHUN_y9HADFihuB=h5g=JmV9_wa27S=1Lag@mail.gmail.com> <502A4D53.7080801@kernel.dk> (sfid-20120814_151756_149302_8A63BE3A) <201208141934.00289.Martin@lichtvoll.de>
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To: Martin Steigerwald <Martin@lichtvoll.de>
Cc: Jens Axboe <axboe@kernel.dk>, Greg Sullivan <greg.sullivan@sullivang.net>, "fio@vger.kernel.org" <fio@vger.kernel.org>
List-ID: <fio@vger.kernel.org>

On 14/08/2012 18:33, Martin Steigerwald wrote:
> invalidate discards the buffer cache before the job group is started.
> During the job execution caches will be in use anyway. Unless using
> direct I/O (direct=3D1). Don=B4t know whether direct I/O will work with
> "windowsaio" I/O engine or in any other way on Windows.

On Windows (windowsaio) use sync=3D1 to disable buffering of writes. For=20
reads, use direct=3D1.

--=20
Bruce Cran