hadoop cluster configuration best practices

Chd4b1 (hadoop-0.23) for namenode ha installation Configuration Cloudera chd4b1 version already contains namenode ha, the Community also put namenode ha branch HDFS-1623 merge to trunk version, can achieve hot backup of dual namenode, but currently only supports manual switch, does not support automatic switch, switch progress in the community see: https://issues.apache.org/jira/browse/HDFS-3042 Namenode ha

-srcbian/ubuntu)Patch with the following commandCD hadoop-common-project/hadoop-common/srcwget https://issues.apache.org/jira/ Secure/attachment/12570212/hadoop-9320.patchPatch 9320. Patch6. Compile the source codeMVN compile-pnative7. After the compilation OK, packaging, do not do one of the test links, less memory, can't playMVN package-pnative-dtar-dskiptests

threads that are expanded after nn startup. Dfs.balance.bandwidthPerSec 1048576 Maximum bandwidth per second used when doing balance, using bytes as units instead of bit Dfs.hosts /opt/hadoop/conf/hosts.allow A host Name list file, where the host is allowed to connect the NN, must write absolute path, the contents of the file is empty is considered to be all. Dfs.hosts.exclude /opt/

;property > name>Mapred.system.dirname> value>/home/kandy/workspace/mapreduce/systemvalue>Property >property > name>Mapred.local.dirname> value>/home/kandy/workspace/mapreduce/localvalue>Property >As follows:3.4 Configuring the Hadoop-env.sh fileUse Vim to open the hadoop-env.sh file under the Conf directory:vim conf/hadoop-env.shIn the

I recently on the windows to write a test program maxmappertemper, and then no server around, so want to configure on the Win7.It worked. Here, write down your notes and hope it helps.The steps to install and configure are:Mine is MyEclipse 8.5.Hadoop-1.2.2-eclipse-plugin.jar1, install the Hadoop development plug-in Hadoop installation package contrib/directory h

corner, click x close to see it)(Note: You can Select the dialog box to display at Windows-showview)further configuration of the plugin:The first step:Select Preference under the Window MenuA form pops up with the Hadoop map/reduce option on the left side of the form, Click this option to select the hadoop installation directory (e.g. / Usr/local/

I use two computers for the configuration of the cluster, if it is a single machine, there may be some problems. First, set the hostname root permissions on the two computer to open the/etc/host fileSet Hostname,root permissions again to open/etc/hostname file settingsFrom the machine set to Slaver.hadoop1. Install the Java JDK and configure the environmentCentOS comes with a JDK installed, and if we want t

Spark1.6.0 on Hadoop-2.6.3 installation configuration 1. Configure Hadoop (1), download Hadoop Mkdir/usr/local/bigdata/hadoopCd/usr/local/bigdata/hadoopwget http://mirror.bit.edu.cn/apache/hadoop/common/hadoop-2.6.3

1. Install Here the installation of hadoop-0.20.2 as an Example Install Java first. Refer to this Download hadoop Extract tar -xzf hadoop-0.20.2 2. Configuration Modify Environment Variables Vim ~ /. Bashrcexport hadoop_home =/home/RTE/hadoop-0.20.2 # The directory location

class about the Integer Range, iterator () is an iterator for configuring objects. The final readfields (datainput) method and write (dataoutput) method are because the configuration class implements the writable interface implementation method, in this way, the configuration class can be distributed in the cluster so that the

file 　　host_ports=hadoop01.xningge.com:2181Start Zookeeper: hue and Oozie configuration Modified: Hue.ini File[Liboozie]Oozie_url=http://hadoop01.xningge.com:11000/oozie If not out of: 　　Modified: Oozie-site.xml 　　 Re-create the Sharelib library under the Oozie directory: 　　bin/oozie-setup.sh sharelib Create-fs Hdfs://hadoop01.xningge.com:8020-locallib Oozie-sharelib-4.0.0-cdh5.3.6-yarn.tar.gzStart Oozie:bin/oozied.sh start hue vs. HBase

tried 7 time (s ).14/01/08 22:01:49 INFO ipc. Client: Retrying connect to server: localhost/127.0.0.1: 12200. Already tried 8 time (s ).14/01/08 22:01:50 INFO ipc. Client: Retrying connect to server: localhost/127.0.0.1: 12200. Already tried 9 time (s ).Mkdir: Call From Lenovo-G460-LYH/127.0.0.1 to localhost: 12200 failed on connection exception: java.net. ConnectException: connection denied; For more details see: http://wiki.apache.org/hadoop/Connec

make configuration effectiveLast view Java versionKeep the JDK version and path of each node as long as possible to facilitate subsequent installation4 Download and unzip HadoopModify the/etc/profile file to add a Hadoop pathFinally make the profile file effective, enter Source/etc/profile5 Configure Namenode , modify the site file6 Configure hadoop-env.sh file7

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