Scalable fault-tolerant upgradable systems Part 1

Joe Armstrong - noreply@blogger.com (Joe Armstrong) - July 19, 2007

let’s talk about servers which are:
Scalablefault-tolerant Dynamically Upgradable
Q: Are these really the same thing?


A: Well not really, but they are very similar.

A system that is fault-tolerant can easily be made scalable and easily made so that we can do in-service upgrade.

Here’s how:

Algorithm1.

In-service Upgrade.

Assume we have N nodes running version one of a program - we want to



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