HBase Master

HMaster is the implementation of the Master Server. The Master server is responsible for monitoring all RegionServer instances in the cluster, and is the interface for all metadata changes. In a distributed cluster, the Master typically runs on the NameNode. J Mohamed Zahoor goes into some more detail on the Master Architecture in this blog posting, HBase HMaster Architecture

module.exports =
    iptables: module: 'masson/core/iptables', local: true
    krb5_client: module: 'masson/core/krb5_client', local: true, required: 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', required: true
    hadoop_core: module: 'ryba/hadoop/core', local: true, required: true
    hdfs_client: module: 'ryba/hadoop/hdfs_client', local: true, required: true
    hdfs_nn: module: 'ryba/hadoop/hdfs_nn', required: true
    # hdfs_dn: module: 'ryba/hadoop/hdfs_dn', required: true
    yarn_rm: module: 'ryba/hadoop/yarn_rm'
    yarn_nm: module: 'ryba/hadoop/yarn_nm'
    ranger_admin: module: 'ryba/ranger/admin', single: true
    hbase_master: module: 'ryba/hbase/master'
    ganglia_collector: module: 'ryba/retired/ganglia/collector', single: true
    metrics: module: 'ryba/metrics', local: true
    log4j: module: 'ryba/log4j', local: true
    'install': [