Re: FW: DFS in RAC

Amir:

DFS is the distributed File System lock.. Remember the old OPS parameter GC_FILES_TO_LOCKS. There is a discussion about _fairness_threshold in the OWI book and a lot more detailed discussion will be available in RAC book, Basically we disown the ownership of the blocks if too many requests come for the specific block. 10gR2 has better remastering algorithm which transfers the ownership of the object instead of the block when it is touched too many times in within certain time (_gc_affinity_time and _gc_affinity_limit).

Regards,
Gopal

> ______________________________________________
> From: Hameed, Amir
> Sent: Monday, July 25, 2005 9:44 AM
> To: oracle-l_at_freelists.org
> Subject: DFS in RAC
>
> There are certain events in RAC that are related to DFS. There are also
> certain init.ora parameters that have the term DFS associated with, like:
>
> _fairness_threshold number --> of times to CR serve before downgrading lock
> (DFS)
>
> Does anyone know what the term "DFS" stands for?
>
> Thanks
> Amir

-- 
Best Regards,
K Gopalakrishnan 
Co-Author: Oracle Wait Interface, Oracle Press 2004
http://www.amazon.com/exec/obidos/tg/detail/-/007222729X/
--
http://www.freelists.org/webpage/oracle-l