Re: 2-node LAVC cluster with quorum disk - network disappears - which node CLUEXITs ?

From: Daryl Jones (jones.computer.srv_at_worldnet.att.net)
Date: 02/26/04 

Date: 25 Feb 2004 23:48:32 -0800

Dear Roy Omond:

Years ago I ran across a problem where the cluster information was
going over the ethernet and not over the CI connection. Therefore,
when the ethernet connection was lost there went the cluster until the
traffic restablished over the CI. Check to see if the cluster
connection was lost over the SCSI or ethernet. There is a sysgen
parameter that controls which path is used. I don't recall the sysgen
parameter because it was over 30 years ago. Sorry about that.

Good Luck!

Regards,
Daryl Jones

Roy Omond <Roy@Omond.net> wrote in message news:<c1ie7r$bhb$1$8300dec7@news.demon.co.uk>...
> Gentle colleagues,
>
> despite working with VMS clusters for the last 100 or so years,
> I'm stuck for an answer to this query:
>
> Scenario:
>
> NODE1 <------ Ethernet ------> NODE2
> + +
> | |
> | |
> +----- Shared SCSI bus --------+
> |
> |
> | Disks including quorum disk
>
> Both nodes have 1 vote, as does the quorum disk,
> expected votes set to 3, quorum therefore is 2.
>
> Ethernet gets, ahem, "disconnected".
>
> One of the nodes voluntarily exits the cluster.
>
> Question: which one ? And why ?
>
> Is it the last one to access the quorum disk that stays up ?
>
>
> Roy Omond
> Blue Bubble Ltd.

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