[Info-vax] openvms clusters

[Stephen Hoffman]

On 2019-05-07 20:38:19 +0000, stuyvesantization said:

> I have a few Openvms clusters and I am wondering what command / files I 
> would look at to tell how the networking is configured.

If you've not already skimmed these through, start with the 
higher-level cluster guidelines and then lower-level clustering manuals 
at HPE.

https://support.hpe.com/hpsc/doc/public/display?docId=a00058693en_us
https://support.hpe.com/hpsc/doc/public/display?docId=emr_na-c04622356
http://h30266.www3.hpe.com/odl/axpos/opsys/cluster84/4477pro.html

That'll get you the terms and concepts.

The lower-level Cluster Systems manual has a section on monitoring 
links using SDA, among other tools.  See "Using SDA to Monitor LAN or 
IP Communications", among other details in those docs.

>  I don't see a "SYS$SYSTEM:TCPIPCLUSTER.DAT" file . When I read the 
> manuals they seem to list a few other communication methods. How can I 
> tell what method the clusters are using for communication? Also how 
> hard is it to convert a cluster to TCP/IP ?

For LAN-local clustering, network protocols including IP, DECnet, LAT, 
and LAD/LAST are unrelated to clustering.

The vast majority of references to IP and DECnet in the clustering 
documentation are to satellite bootstrap operations.  Cluster 
satellites are rather less common than they once were, too.

Clustering on an Ethernet local area network uses a non-routed network 
protocol known as System Communications Services (SCS).

With clusters comprised entirely of V8.4 and later, clustering can 
communicate among sites using IP as a point-to-point transport for SCS 
traffic—what's sometimes called IPCI, among other acronyms—but 
clustering over IP is only very rarely used on a local network.

https://support.hpe.com/hpsc/doc/public/display?docId=emr_na-c04618666

Page 15-13 of the (~dozen year old) OpenVMS FAQ discusses some control 
tools and commands:

http://hoffmanlabs.com/vmsfaq/vmsfaq.pdf

Also around on Freeware V5.0 is the MONLAV tool.

https://www.digiater.nl/openvms/freeware/v50/netmon/

If you have specific questions, you'll want to post those, along with 
the architectures and OpenVMS versions involved.

-- 
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