请教一下Hadoop是怎么分块的？

Question

Hadoop是怎么分块的

Answer 1

final String url = "jdbc:oracle:thin:@localhost:1521:ORCL";final String user = "store";final String password = "store_password";Class.forName("oracle.jdbc.driver.OracleDriver");Connection con = DriverManager.getConnection(url, user, password);return con;}

Answer 2

你要问是逻辑上的组成还是物理上的。逻辑上最简单的就是map 和 reduce。物理上就是 namenode，datanode，jobtracker，tasktracker。其中HDFS包括了namenode和datanode.