Sqoop- export and import data
Pig: jdbc and odbc dataflow and transform large data set
Hive: sql like query language, JDBC/ODBC
Oozie: workflow
Flume: moving data from rdbms to hdfs
Hbase: column base family that give high throughput
NameNode: holds metadata for HDFS
Secondary NameNode: Perform housekeeping function for
namenode.
Datanode: stores actual HDFS data blocks
Job Tracker: Manages Mapreduce jobs, distribute individual task
to machine
Task tracker: instantiates and monitors individual map
reduce tasks
