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 - [Distributed Systems for fun and profit](http://book.mixu.net/distsys/single-page.html) [Free]
 - [Distributed Systems Principles and Paradigms, Andrew Tanenbaum](http://www.amazon.com/Distributed-Systems-Principles-Paradigms-2nd/dp/0132392275) [Amazon Link]
 - [Scalable Web Architecture and Distributed Systems](http://www.aosabook.org/en/distsys.html) [Free]
+
+## Papers
+Must read papers on distributed systems
+- [Times, Clocks and Ordering of Events in Distributed Systems](http://research.microsoft.com/en-us/um/people/lamport/pubs/time-clocks.pdf) Lamport's paper, the Quintessential distributed systems primer
+
+### Databases
+- [Dynamo: Amazon's Highly Available Key Value Store](http://bnrg.eecs.berkeley.edu/~randy/Courses/CS294.F07/Dynamo.pdf)
+- [Bigtable: A Distributed Storage System for Structured Data](http://static.googleusercontent.com/media/research.google.com/en//archive/bigtable-osdi06.pdf)
+- [Cassandra: A Decentralized Structured Storage System](http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.161.6751&rep=rep1&type=pdf)