cloudera hadoop documentation

Deployment environment os:ubuntu12.04 Server Hadoop:cdh3u6 Machine list: Namenode 192.168.71.46;datanode 192.168.71.202,192.168.71.203,192.168.71.204 Installing Hadoop Add a software source /etc/apt/sources.list.d/cloudera-3u6.list Insert Deb Http://192.168.52.100/hadoop MAVERICK-CDH3 Contrib DEB-SRC Http://192.168.52.100/

To standardize hadoop configurations, cloudera can help enterprises install, configure, and run hadoop to process and analyze large-scale enterprise data. For enterprises, cloudera's software configuration does not use the latest hadoop 0.20, but uses hadoop 0.18.3-12.

segment I/O operations, rather than an audit trail of a database. Therefore, it is possible to understand the activity only by providing different levels of monitoring to be able to audit activities that enter directly through the lower points in the stack.Hadoop Activity MonitoringThe events that can be monitored include:• Session and user information.HDFs Operations – commands (cat, tail, chmod, chown, expunge, and so on).MapReduce Jobs-Jobs, actions, permissions.• Exceptions, such as authori

Cloudera VM 5.4.2 How to start Hadoop services1. Mounting position/usr/libhadoopsparkhbasehiveimpalamahout2. Start the first process init automatically, read Inittab->runlevel 5start the sixth step --init Process Execution Rc.sysinitAfter the operating level has been set, the Linux system performsfirst user-level fileIt is/etc/rc.d/rc.sysinitScripting, it does a lot of work, including setting path, setting

/tmpHadoop Fs-chmod G+w/home/hduser/hive/warehouse4. Copy the configuration files from the hive_conf to the/home/hduser/hive/conf5. Modify the Hive-site.xml fileModify the property Hive.metastore.warehouse.dir value to:/home/hduser/hive/warehouseModify the property Hive.exec.scratchdir value to:/home/hduser/hive/tmp6. Copy the MySQL JDBC driver package Mysql-connector-java-5.0.7-bin.jar to the Lib directory of hive.7. Start hive and execute show tables;8. If the seventh step is no exception, the

Resource Manager ha is a feature that Hadoop has introduced since 2.4, providing redundancy in a active/standby way to eliminate the risk of a single point of failure.1, the overall structure:650) this.width=650; "Src=" http://hadoop.apache.org/docs/stable/hadoop-yarn/hadoop-yarn-site/images/ Rm-ha-overview.png "alt=" Overview of ResourceManager High Availability