There's also CitusDB, which performs much better than Hadoop because it doesn't have the bloat of the JVM or the inefficiency of brain-dead HDFS. You can write

There's also CitusDB, which performs much better than Hadoop because it doesn't have the bloat of the JVM or the inefficiency of brain-dead HDFS. You can write your queries in a few lines of SQL rather than reams of convoluted Java code.