[Info-vax] Wide area cluster, metro area network, seeking info

[Dave Froble]

On 6/11/2021 4:35 PM, Phillip Helbig (undress to reply) wrote:
> In article <d460f2c9-7c6d-4c56-b8fb-61d7e669ebdcn at googlegroups.com>,
> Rich Jordan <jordan at ccs4vms.com> writes:
>
>> The point: the system at the second location will be a backup site and/or
>> disaster recovery box.  There is no third location and I have no info on
>> the likelihood of getting one.
>
> A two-node cluster either has each node with equal votes, and both must
> be present, or one has more than the other, and the cluster needs it to
> survive.  In either case, if you lose the main site, some manual
> intervention will be necessary to allow the cluster to continue.  And
> that might not be worth much without access to data.  It is possible for
> the two nodes to share storage, but unless that is at a third location,
> with your setup above things won't work at all if you lose one of the
> sites.  HBVS, at least if we are talking about several kilometers
> between the nodes, say, is probably the way to go.  (The individual
> members can be anything VMS sees as a disk, i.e. could come from a SAN
> or whatever.)
>
> Unless the office is at one of the locations, just put a third
> node---the smallest you can find---in the office.  (You could also put a
> quorum disk there, and could thus keep going after losing one of the big
> sites, but a node probably offers more for little or no additional
> cost.)
>

What does a cluster license for that third node cost these days?

My worthless opinion is, if you are not going to have shared disks, 
HBVS, and such, then why run a cluster?

-- 
David Froble                       Tel: 724-529-0450
Dave Froble Enterprises, Inc.      E-Mail: davef at tsoft-inc.com
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