Merge branch 'master' of https://github.com/audienceproject/spark-dynamodb

Author: jacobfi

README.md

@@ -86,6 +86,7 @@ The following parameters can be set as options on the Spark reader object before
 
 - `readPartitions` number of partitions to split the initial RDD when loading the data into Spark. Defaults to the size of the DynamoDB table divided into chunks of `maxPartitionBytes`
 - `maxPartitionBytes` the maximum size of a single input partition. Default 128 MB
+- `defaultParallelism` the number of input partitions that can be read from DynamoDB simultaneously. Defaults to `sparkContext.defaultParallelism`
 - `targetCapacity` fraction of provisioned read capacity on the table (or index) to consume for reading. Default 1 (i.e. 100% capacity).
 - `stronglyConsistentReads` whether or not to use strongly consistent reads. Default false.
 - `bytesPerRCU` number of bytes that can be read per second with a single Read Capacity Unit. Default 4000 (4 KB). This value is multiplied by two when `stronglyConsistentReads=false`