topic Re: OpenVMS v7.2-1 | Cluster | Which nic's is SCS running across? in Operating System - OpenVMS

OpenVMS v7.2-1 | Cluster | Which nic's is SCS running across?

Hejib — Thu, 12 Mar 2009 16:36:37 GMT

Hi, we have a OpenVMS v7.2-1 split site cluster and multiple nics. As this pre-dates
SCACP, can anyone identify how I can verify which network interfaces the cluster protocol
are running across? I assume it's into SDA and ...
Thank you.

Re: OpenVMS v7.2-1 | Cluster | Which nic's is SCS running across?

Volker Halle — Thu, 12 Mar 2009 16:54:23 GMT

Graham,

$ ANAL/SYS
SDA> SHOW LAN

should report, on which adapters the SCA protocol is running.

You can also obtain the SCA bus, channel etc. information with SDA:

SDA> SHOW PORT
SDA> SHOW PORT/ADDR=PE_PDT/bus/chan/vc

The data representation by SCACP is much nicer, but you get the details in V7.2-1 as well.

Volker.

Re: OpenVMS v7.2-1 | Cluster | Which nic's is SCS running across?

Jan van den Ende — Thu, 12 Mar 2009 18:17:40 GMT

Graham,

Volker's answer will tell you the actual device in current use, but, unless you went through quite some effort to prevent it, SCS will use ANY connection available. Although it WILL preferently the most 'easy' (usually: highest capacity) connection. With automatic failover in case of need....

hth

Proost.

Have one on me.

jpe

Re: OpenVMS v7.2-1 | Cluster | Which nic's is SCS running across?

Jan van den Ende — Thu, 12 Mar 2009 18:21:19 GMT

Graham,

from your Forum Profile:

I have assigned points to 33 of 59 responses to my questions.

They date back to 2006

Maybe you can find some time to do some assigning?

http://forums1.itrc.hp.com/service/forums/helptips.do?#33

Mind, I do NOT say you necessarily need to give lots of points. It is fully up to _YOU_ to decide how many. If you consider an answer is not deserving any points, you can also assign 0 ( = zero ) points, and then that answer will no longer be counted as unassigned.
Consider, that every poster took at least the trouble of posting for you!

To easily find your streams with unassigned points, click your own name somewhere.
This will bring up your profile.
Near the bottom of that page, under the caption "My Question(s)" you will find "questions or topics with unassigned points " Clicking that will give all, and only, your questions that still have unassigned postings.

Thanks on behalf of your Forum colleagues.

PS. nothing personal in this. I try to post it to everyone with this kind of assignment ratio in this forum. If you have received a posting like this before please do not take offence none is intended!

PPS. Zero points for THIS entry, please.

Proost.

Have one on me.

jpe

Re: OpenVMS v7.2-1 | Cluster | Which nic's is SCS running across?

Peter Zeiszler — Thu, 12 Mar 2009 20:40:29 GMT

http://vms.tuwien.ac.at/info/tips/get-preferred-cluster-path.txt

I do like the mc scacp show channel - real nice tool

Re: OpenVMS v7.2-1 | Cluster | Which nic's is SCS running across?

Robert Atkinson — Fri, 13 Mar 2009 10:25:25 GMT

Graham, when you've used ANAL/SYS to work out what your NIC's are, you can use LAVC to force SCS over specific cards :-

$ MC LAVC$STOP_BUS EIA
$ MC LAVC$STOP_BUS EIB
$ MC LAVC$STOP_BUS EWA

Beware that this could cause one or more of your nodes to crash and reboot themselves during boot, as the SCS path it uses to form the cluster could be taken away, and it has to find a new one.

This ?possibly? only happens when you physically power off the system (never quote got to the bottom of it as it's not that much of an issue.)

Rob.

Re: OpenVMS v7.2-1 | Cluster | Which nic's is SCS running across?

Wim Van den Wyngaert — Fri, 13 Mar 2009 13:17:42 GMT

Note that interfaces that send and do not receive are not used. E.g. when no cable is connected. So, those can be disabled.

Wim

Re: OpenVMS v7.2-1 | Cluster | Which nic's is SCS running across?

Hejib — Thu, 19 Mar 2009 11:03:01 GMT

Thank you - you've answered my questions.