Interesting benchmark papers

 

Benchmark comparison of Cassandra, HBase, Sharded MySql, and PNUTS (Yahoo proprietary)

http://www.brianfrankcooper.net/pubs/ycsb.pdf

 

Led me to this comparison of Batch processing techniques: Parallel SQL / Map Reduce etc.

http://database.cs.brown.edu/sigmod09/benchmarks-sigmod09.pdf