How to Disable SMB2 Caching on a per application basis, or how to detect SMB2 ?

Question

In a large legacy application, a lot of multiuser synchronisation is happening using a simple system whereby a workstation makes a file on the network and expects other workstations to see this file.  The original workstation deletes the file when other workstations are free to proceed.  A sort of rudimentary cross-workstation Mutex in other words.

This worked well enough so far, but is now broken when SMB2.0 is in use (Server 2008 + Vista clients).


Due to this being legacy, I can't afford to rewrite and spend a lot of time on this.

Now... while a lot of places this sort of checks are done, there's only a few places that are actually trying to prevent access.  So I see several ways out of this...

1) Disable SMB2.0 caching for the application only.  Disabling SMB2 entirely is a performance penalty I'm not sure we can impose upon the users (I doubt it)...  Is this possible ?
2) Somehow 'force' a reread of the cache, But since checking happens a lot, I can't afford just waiting the timeout period here. It does need to force a reread "now".  Is this possible ?
3) Is it possible to detect that connection to a specific server is happening with SMB2 ?  Since the actions that impose restrictions are rather limited, I could get my way out with a simple messabox and a disclaimer and some minor tweaks to the code (not ideal, but acceptable in this case).  But I don't want to give this messagebox when I don't have to.



Thanks

Answer 1

Hello OReubens,

This forum provides support for documentation and interoperability questions on open specifications.
The Open Protocol Specifications can be found at: http://msdn2.microsoft.com/en-us/library/cc203350.aspx.
Your post does not appear to be related to the Open Protocols Specifications documentation set.

You may want to try one of our other  forums to get you started finding what you need. I think the below forum would be the best place to start:

http://social.technet.microsoft.com/Forums/en-US/windowsserver2008r2networking/threads

Thanks
John Dunning
Senior Escalation Engineer Microsoft Corporation
US-CSS DSC PROTOCOL TEAM