[Info-vax] Third node into 2-node cluster

Michael Moroney moroney at world.std.spaamtrap.com
Thu Mar 28 12:55:38 EDT 2019


Dave Froble <davef at tsoft-inc.com> writes:

>I do not understand any of the logic on having a third node that is not 
>a full member of the cluster.  Assuming that it has a cluster license, 
>why would you not then make full use of it.

Particularly when a 2660 is a more powerful and newer (more reliable)
system than the 2600s. You may want to make the 2660s the new "production"
systems and retire the 2600s as quorum nodes.

Anyway, I second the suggestion making all the configuration stuff common
clusterwide (ideally on a shadowset) with all disks mounted everywhere.
Strange things can happen when two different accounts get the same UIC and
own each others' files.

Also if the first two systems are in different data centers for disaster
tolerance, you want the third node at a third site, Otherwise a disaster
(or just a power failure, or wayward backhoe) on the site with two systems
will take both out and the third will lose quorum.



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