RE: RE: [Opendlm-devel] ODLM/OGFS Recovery

On 26 Apr 2004, Daniel McNeil wrote:

> This DLM/recovery discussion has been a very interesting.  I just
> thought I would add my 2 cents worth from previous experience with
> a cluster file system from several years ago.  This is from my
> memory, so this might not be exact.

Thanks for your help :) You do help us a lot (deadman lock are introduced to 
OpenGFS by your suggestion :)
 
> We had to work out these same issues.  We also used a DLM that provided
> persistent locks (obviously not open DLM).  The way the DLM worked was
> that after a crash (node crash), persistent locks for a particular
> lock domain would continue to return DUBIOUS even after DLM recovery
> until the application made a call to re-validate all persistent locks
> for the domain.

Yes, we met the same problem with one difference: orphan lock in OpenDLM is NOT 
persistent in node failure case. That is what made us headache. We are now 
trying to using LVB or some other way to work around this pitfall. Any 
suggestion?

Best Regards,
Stan
-- 
Opinions expressed are those of the author and do not represent Intel
Corporation




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