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@@ -495,6 +495,19 @@ If you are using SSL for server to server communication, you must use it on all
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- [mattn/etcd-vim](https://github.com/mattn/etcd-vim) - SET and GET keys from inside vim
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- [mattn/etcdenv](https://github.com/mattn/etcdenv) - "env" shebang with etcd integration
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+## FAQ
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+
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+### What size cluster should I use?
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+
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+Every command the client sends to the master is broadcast it to all of the followers.
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+But, the command is not be committed until the majority of the cluster machines receive that command.
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+
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+Because of this majority voting property the ideal cluster should be kept small to keep speed up and be made up of an odd number of machines.
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+
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+Odd numbers are good because if you have 8 machines the majority will be 5 and if you have 9 machines the majority with be 5.
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+The result is that an 8 machine cluster can tolerate 3 machine failures and a 9 machine cluster can tolerate 4 nodes failures.
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+And in the best case when all 9 machines are responding the cluster will perform at the speed of the fastest 5 nodes.
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+
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## Project Details
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### Versioning
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Brandon Philips