hadoop-2.3.0 is the first release for the year 2014, and brings a number of enhancements to the core platform, in particular to HDFS.
With this release, there are two significant enhancements to HDFS:
- Support for Heterogeneous Storage Hierarchy in HDFS (HDFS-2832)
- In-memory Cache for data resident in HDFS via Datanodes (HDFS-4949)
With support for heterogeneous storage classes in HDFS, we now can take advantage of different storage types on the same Hadoop clusters.…