Can I configure high availability with two servers

Question

Currently we have 3 servers in pre-production and two servers in Test environment. I want to test AppFabric high availability in Test with a two server setup. Will AppFabric HA work with a two server setup?

I did try it. Once I configure a cache with the appropriate changes to the cluster configuration, restart and clear the cache, AppFabric crashes. 

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Thor Richards Systems Architect

Answer 1

HA always needs at least two servers running, one primary and one backup. That's why you need 3 servers in production, if one crashes you still have a primary and backup server. HA will run on two servers in test, you'll see a secondary copy of each object added to the cache on the other server, but if you take either of those two servers down the cluster will throw an exception due to an insufficient number of secondaries.

Answer 2

HA always needs at least two servers running, one primary and one backup. That's why you need 3 servers in production, if one crashes you still have a primary and backup server. HA will run on two servers in test, you'll see a secondary copy of each object added to the cache on the other server, but if you take either of those two servers down the cluster will throw an exception due to an insufficient number of secondaries.