hadoop 50070

# #执行完之后, sometimes the tasktracker,datanode will open, so close thembin/hadoop-daemon.sh Stop Tasktrackerbin/hadoop-daemon.sh Stop DatanodeDelete the file in/tmp as a Hadoop user, save the file with no permissionsSu-hadoopBin/hadoop Namenode-formatbin/start-dfs.shBin/start-mapred.sBin/

Avatardatanode data nodes. 2. Start Avatarnode (Primary) under the Primary node Hadoop root directory Bin/hadooporg.apache.hadoop.hdfs.server.namenode.avatarnode–zero 3. Start Avatarnode (Standby) under the Standby node Hadoop root directory Bin/hadooporg.apache.hadoop.hdfs.server.namenode.avatarnode-one–standby 4. Start Avatardatanode in the Hadoop root directo

/ On gdy195 [Root @ gdy195/] # chown hduser. hduser/usr/gd/-R [Root @ gdy195/] # ll/usr/gd/ The pseudo-distributed mode of hadoop has been fully configured. Start the hadoop pseudo-distributed mode Use the gdy192 host. Log on to the root user again. Switch to hduser Format hadoop's file system HDFS [Hduser @ gdy192 ~] $ Hadoop namenode-format Start

;property>configuration>hdfs-site.xmlconfiguration>property>name>dfs.namenode.name.dirname>value>file:/home/hadoop/hadoop-2.4.1/dfs/namevalue>property>property>name>dfs.datanode.data.dirname>value>file:/home/hadoop/hadoop-2.4.1/dfs/datavalue>property>property>name>dfs.replicationname>value>1value>property>configuration

-2.6.0/logs/hadoop-hadoop-datanode-ocean-lab.ocean.org.outStarting secondary namenodes [0.0.0.0]The authenticity of host '0. 0.0.0 (0.0.0.0) 'can't be established.RSA key fingerprint is a5: 26: 42: a0: 5f: da: a2: 88: 52: 04: 9c: 7f: 8d: 6a: 98: 9b.Are you sure you want to continue connecting (yes/no )? Yes0.0.0.0: Warning: Permanently added '0. 0.0.0 '(RSA) to the list of known hosts.0.0.0.0: starting seco

Mapred-site.xml Create a file in the directory, fill in the above content configuration Yarn-site.xml start Hadoop Execute First: Hadoop namenode-format Then start hdfs:start-dfs.sh, if the Mac computer shows localhost port 22:connect refused, need to set-share-tick telnet, allow access to that add current user. You will be asked to enter the password 3 times after executing start-dfs.sh. Then: start-

; Property > property > name>Dfs.datanode.data.dirname> value>File:/usr/local/hadoop/tmp/dfs/datavalue> Property >configuration>If you need to change to non-distributed, then delete the modified content.Execute the following command to format the namenode (executed under the HADOOP2 directory)./bin/hdfs namenode -formatSeeing successfully formatted is a success.Execute the following command to open the daem

) Configure Core-site.xml:vim Core-site.xml, add:Create the TMP folder under/usr/local/hadoop-2.4.1: mkdir tmp　　2) Configure Hdfs-site.xml:vim Hdfs-site.xml, add:Create a folder under/usr/local/hadoop-2.4.1: mkdir HDFs, mkdir hdfs/name, mkdir hdfs/data　　3) Configure Yarn-site.xml:vim Yarn-site.xml, add:　　4) configuration mapred-site.xml: CP mapred-site.xml.template Mapred-site.xml, vim mapred-site.xml , add

Hadoop Foundation----Hadoop Combat (vi)-----HADOOP management Tools---Cloudera Manager---CDH introduction We have already learned about CDH in the last article, we will install CDH5.8 for the following study. CDH5.8 is now a relatively new version of Hadoop with more than hadoop2.0, and it already contains a number of

temporarily ignores the RPC server. The following describes the attributes of the HTTP server that can be used to define each HTTP Server: mapred. job. tracker. HTTP. addrss: the HTTP server address and port of jobtracker. Default Value: 0.0.0.0: 50030; mapred. task. tracker. HTTP. address: the HTTP server address and port of tasktracker. The default value is 0.0.0.0: 50060; DFS. HTTP. address: the HTTP server address and port of namenode. The default value is 0.0.0.0: