[Info-vax] Idiots Guide To Clustering

[JF Mezei]

Robert Jarratt wrote:
> I have never set up a cluster. All I need is something that will allow me to 
> boot a MicroVAX from the network. I am running VMS 7.3. Can anyone point me 
> at some simple instructions on how to set this up?

As others have said, there is a Guide to Cluster Configs.
http://www.hp.com/go/vms/doc and look for the Open VMS system documentation


the VMS directory struture for the OS is also part of the clustering:


on a single system, you will have:


[VMS$COMMON]  (common files)
[SYS0]        (system root meant to contain node specific files)

within [SYS0] there is a [.SYSCOMMON] which is an alias to [VMS$COMMON]

Logical names point to a search list that points to the system root
first and the common directrory second.

For instance, SYS$SYSTEM resolves to [SYS0.SYSEXE] and
[VMS$COMMON.SYSEXE]  (or [SYS0.SYSCOMMON.SYSEXE] which is the same)


When you create a new node on the same system disk, the
CLUSTER_CONFIG.COM procedure will create a new root. You give it a
number. Say we use "1".

So it will create [.SYS1] which will contain all the files specific to
the second node.

Node 2's SYS$SYSTEM will point to [SYS1.SYSEXE] and [VMS$COMMON.SYSEXE]

So all the node specific files (such as modparams.dat etc) are in the
[SYSx] directories, while all the common files are in the VMS$COMMON tree.

You can have the user authorization files in the commmon area so they
are shared by all the nodes.