[Linux-cluster] DLM

[Patricio Bruna V]

El jue, 17-03-2005 a las 17:02 -0500, Daniel Phillips escribió:
> Hi Patricio,

> Perhaps you meant, how does your program ask for a lock?  Or how does 
> DLM get a lock from a nonlocal machine?  From userspace, you go through 
> a library that presents an interface similar to ancient Vaxcluster, and 
> later, IBM's OpenDLM.  (But somewhat more complex because of the 
> hierarchical locks feature and a few other wrinkles.)  These API calls 
> are translated into socket messages to and from the in-kernel DLM.  The 
> local DLM consults its lock directory to find out which machine masters 
> the lock and requests the lock from that machine, which then tries to 
> get the lock based on its knowledge of current holders, if any.
> 
> Does that answer your question?
> 
Daniel,
	thx for the answer, but i have another question.
	Its necesary that the programs be build agains or with the dlm api?

because if they need to, i dont see the benefits of dlm.
-- 
Patricio Bruna
pbruna at linuxcenterla.com
Red Hat Certified Engineer
Jefe Soporte y Operaciones LinuxCenter S.A.
Canada 239, 5to piso, Providencia, Chile
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