[Info-vax] Creating an open source version of VMS, was: Re: OpenVMS Hobbyist Notification

[Michael Moroney]

Dave Froble <davef at tsoft-inc.com> writes:

>I haven't studied it from this particular perspective, and without doing 
>so would only be guessing.  But I have to ask, why do you state this. 
>As far as I know the VMS DLM has not much to do with the "kernel" of 
>VMS, supposing there is a definition of that entity.

>Remember, the VMS DLM does no enforcing.  It is strictly a utility that 
>can maintain a database of locks and cooperating processes can be guided 
>by the utility.

The DLM is all kernel mode code and is intertwined with the cluster logic to 
ensure it is consistent across the cluster.  Plus parts of the kernel itself 
use it, as does the file system.