[Samba] Oplocks - when do they help
uri_simchoni at hotmail.com
Sat May 22 11:10:09 MDT 2010
So a single-user mdb benefits from oplocks, multi-user mdb suffers from oplocks, and applications that load/store whole files are indifferent to it?
> Date: Sat, 22 May 2010 18:55:02 +0200
> From: Volker.Lendecke at SerNet.DE
> To: uri_simchoni at hotmail.com
> CC: samba at lists.samba.org
> Subject: Re: [Samba] Oplocks - when do they help
> On Sat, May 22, 2010 at 06:21:52PM +0300, Uri Simchoni wrote:
> > I googled around and the general wisdom seems to be that
> > oplocks provide a performance gain if files are accessed
> > by a single client at a time (that is, if the oplock does
> > not break).
> > What I can't figure out is what test can show this
> > performance gain. I mean, theoretically, document-editing
> > applications (Word,excel) save and load whole files and
> > hence do not benefit from oplocks. Applications which do
> > modify portions of a file usually flush buffers to
> > maintain transactional integrity and hence should not
> > benefit from oplocks either.
> > So, how can I demonstrate the benefit of oplocks?
> Use an Access .mdb file.
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