Monday Jan 23, 2012

How to Survive the End of the World - Part II

In Part I of our Survival Guide for Civilization, I explained how to save civilization by identifying four distant planets that had the essential building blocks of civilization and combining them into a 5-node cluster with Earth:

Building BlockDistant Planet
--------------------------------------
footballDitka
cheerleadersDallas
beerBud
bratsMilwaukee
--------------------------------------
civilizationbackup civilization

As mentioned in Part I, the resulting five-node cluster was actually more than what we wanted. Five distant planets! We'd rather not deal with the overhead of managing five distant planets. We prefer to keep managing just one planet, but make sure that can keep civilization humming. Turns out that we can accomplish that through the magic of virtualization. As you might expect, it's called a virtual cluster. (Really techie people call it a failover zone cluster.)

First, we create one zone on Earth for each building block:

Building BlockZone on Earth
--------------------------------------
footballfootball-zone
cheerleaderscheerleader-zone
beerbeer-zone
bratsbrats-zone
--------------------------------------
civilizationcivilization zones

Then we create one failover zone on each distant planet for each zone on Earth:

Zone on EarthFailover ZoneDistant Planet
---------------------------------------------------------
football-zonefootball-failover-zoneDitka
cheerleaderscheerleaders-failover-zoneDallas
beerbeer-failover-zoneBud
bratsbrats-failover-zoneMilwaukee
---------------------------------------------------------
zone civilizationfailover zone civilization

In this way, each failover zone on its distant planet backs up one original zone on Earth. It's a great way to save civilization with much less overhead.

As it turns out, not only do we have an article that shows you how to create a cluster with Solaris Cluster 4.0, but we have one that shows you how to create a failover cluster, too:

How to Create A Failover Zone Cluster

Give it a try. It never hurts to be prepared.

- Rick
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Kemer Thomson
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