[Samba] Oplocks - when do they help

Volker Lendecke Volker.Lendecke at SerNet.DE
Sat May 22 10:55:02 MDT 2010

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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