Hadoop HDFS NameNode

NameNode’s primary responsibility is storing the HDFS namespace. This means things like the directory tree, file permissions, and the mapping of files to block IDs. It tracks where across the cluster the file data is kept on the DataNodes. It does not store the data of these files itself. It’s important that this metadata (and all changes to it) are safely persisted to stable storage for fault tolerance.

module.exports =
    iptables: module: 'masson/core/iptables', local: true
    krb5_client: module: 'masson/core/krb5_client', local: true
    java: module: 'masson/commons/java', local: true
    test_user: module: 'ryba/commons/test_user', local: true, auto: true
    zookeeper_server: module: 'ryba/zookeeper/server'
    hadoop_core: module: 'ryba/hadoop/core', local: true, auto: true, implicit: true
    hdfs_jn: module: 'ryba/hadoop/hdfs_jn'
    hdfs_dn: module: 'ryba/hadoop/hdfs_dn'
    hdfs_nn: module: 'ryba/hadoop/hdfs_nn'
    ranger_admin: module: 'ryba/ranger/admin', single: true
    metrics: module: 'ryba/metrics', local: true
    log4j: module: 'ryba/log4j', local: true
    'install': [