Raft:
http://www.infoq.com/presentations/raft
D.Ongario The Raft consensus algorithm
Diego Ongaro and John K Ousterhout: "In Search of an Understandable Consensus
Algorithm (Extended Version)," at USENIX Annual Technical Conference (USENIX
ATC), June 2014.
ramcloud.stanford.edu/raft.pdf

Heidi Howard, Malte Schwarzkopf, Anil Madhavapeddy, and Jon Crowcroft: gRaft
Refloated: Do We Have Consensus?,h ACM SIGOPS Operating Systems Review, volume
49, number 1, pages 12?21, January 2015.
doi:10.1145/2723872.2723876
http://www.cl.cam.ac.uk/~ms705/pub/papers/2015-osr-raft.pdf


Paxos:
http://wellquite.org/blog/paxos_notes.html
http://en.wikipedia.org/wiki/Paxos_%28computer_science%29
http://www.read.seas.harvard.edu/~kohler/class/08w-dsi/chandra07paxos.pdf
https://habrahabr.ru/post/346180/
https://lamport.azurewebsites.net/pubs/paxos-simple.pdf


Zab:
Flavio P Junqueira, Benjamin C Reed, and Marco Serafini: "Zab: High-performance
broadcast for primary-backup systems," at 41st IEEE International Conference on
Dependable Systems and Networks (DSN), pages 245?256, June 2011.
doi:10.1109/DSN.2011.5958223

Robbert van Renesse, Nicolas Schiper, and Fred B Schneider: gVive La Difference:
Paxos vs. Viewstamped Replication vs. Zab,h IEEE Transactions on Dependable and
Secure Computing, volume 12, number 4, pages 472?484, September 2014.
doi:10.1109/TDSC.2014.2355848
https://arxiv.org/abs/1309.5671


Akka Cluster:
http://www.slideshare.net/jboner/the-road-to-akka-cluster-and-beyond