Please see the .proto files: RPC implementation: ./hadoop-common-project/hadoop-common/src/main/proto/hadoop_rpc.proto
Protocols used in HDFS. See the corresponding java classes and javadoc for additional information. ./hadoop-hdfs-project/hadoop-hdfs/src/main/proto/ClientDatanodeProtocol.proto ./hadoop-hdfs-project/hadoop-hdfs/src/main/proto/ClientNamenodeProtocol.proto ./hadoop-hdfs-project/hadoop-hdfs/src/main/proto/DatanodeProtocol.proto ./hadoop-hdfs-project/hadoop-hdfs/src/main/proto/datatransfer.proto ./hadoop-hdfs-project/hadoop-hdfs/src/main/proto/GetUserMappingsProtocol.proto ./hadoop-hdfs-project/hadoop-hdfs/src/main/proto/HAZKInfo.proto ./hadoop-hdfs-project/hadoop-hdfs/src/main/proto/hdfs.proto ./hadoop-hdfs-project/hadoop-hdfs/src/main/proto/InterDatanodeProtocol.proto ./hadoop-hdfs-project/hadoop-hdfs/src/main/proto/JournalProtocol.proto ./hadoop-hdfs-project/hadoop-hdfs/src/main/proto/NamenodeProtocol.proto ./hadoop-hdfs-project/hadoop-hdfs/src/main/proto/RefreshAuthorizationPolicyProtocol.proto ./hadoop-hdfs-project/hadoop-hdfs/src/main/proto/RefreshUserMappingsProtocol.proto There are similar files for YARN as well. On Sat, Aug 18, 2012 at 1:14 PM, Hans Uhlig <huh...@uhlisys.com> wrote: > Does any documentation exist for interacting with a Hadoop cluster from a > native environment as opposed to JNI? Preferably protocol documentation. > -- http://hortonworks.com/download/