Hi all, I plan to merge the following JIRAs to branch-2 this week unless there are any objections:
"Direct read" optimization: 6e51b33 HADOOP-8135. Add ByteBufferReadable interface to FSDataInputStream. Contributed by Henry Robinson. 4418682 HADOOP-8244. Improve comments on ByteBufferReadable.read. Contributed by Henry Robinson. c66f982 HDFS-2834. Add a ByteBuffer-based read API to DFSInputStream. Contributed by Henry Robinson. 467acd1 HDFS-3110. Use directRead API to reduce the number of buffer copies in libhdfs. Contributed by Henry Robinson. These improvements give a substantial savings in CPU to applications using libhdfs, and have some potential for usage in apps like HBase and MR as well. MiniDFSClusterManager: bfa5c0a HDFS-3167. CLI-based driver for MiniDFSCluster. Contributed by Henry Robinson. 21dfa6a HDFS-3235. MiniDFSClusterManager doesn't correctly support -format option. Contributed by Henry Robinson. These test-only improvements make it easier to construct system tests against realistic pseudo-distributed clusters. All of the above patches have been baking in trunk for quite some time. Thanks -Todd -- Todd Lipcon Software Engineer, Cloudera
