Intro
LogCabin is a distributed system that provides a small amount of highly replicated, consistent storage. It is a reliable place for other distributed systems to store their core metadata and is helpful in solving cluster management issues.
We've written a paper about the Raft consensus algorithm which LogCabin uses internally. A draft of this paper is available here (PDF).
Source code
LogCabin is still in early stages of development and is not yet recommended for actual use. The source code is here: https://github.com/logcabin/logcabin
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Viewstamped Replication: A New Primary Copy Method to Support Highly-Available Distributed Systems (PODC '88)