cdh hadoop

Write scalable, distributed data-intensive programs and basics Understanding Hadoop and MapReduce Write and run a basic MapReduce program 1. What is HadoopHadoop is an open-source framework for writing and running distributed applications to handle large-scale data.What makes Hadoop unique is the following points: Convenient--hadoop run on a

Environment[Email protected] soft]#Cat/etc/Issuecentos Release6.5(Final) Kernel \ r \m[[email protected] soft]#uname-Alinux vm80282.6. +-431. el6.x86_64 #1SMP Fri Nov A Geneva: the: theUtc -x86_64 x86_64 x86_64 gnu/Linux[[email protected] soft]# Hadoop versionhadoop2.7.1Subversion https://git-wip-us.apache.org/repos/asf/hadoop.git-r 15ecc87ccf4a0228f35af08fc56de536e6ce657aCompiled by Jenkins on -- .-29t06:04zcompiled with Protoc2.5.0From source with c

1. The virtual machine installation hadoop,windows cannot access the Hadoop Web page http://master:50070/through the host name. Windows Ping Master also pings the method: Add Linux under Windows native C:\Windows\System32\drivers\etc\hosts files Hosts configure the hostname and IP address of the Hadoop machine to add in. Issue 2, Windows Eclipse runni

First, download the Hadoop websitehttp://hadoop.apache.orghttps://archive.apache.org/dist/hadoop/common/hadoop-2.6.0 Administrator Identity Decompression D:\Hadoop\hadoop-2.6.0Second, the download of winutilsAlso need to download Winutils.exe,requires a corresponding version

Part 1: hadoop BinThe following hadoop bin is based on the actual needs of the project:Hadoop ShellHadoop-config.sh, which is used to assign values to some variablesHadoop_home (hadoop installation directory ).Hadoop_conf_dir (hadoop configuration file directory ). Hadoop_slaves (-- the address of the file specified by

Ubuntu installation (Here I do not catch a map, just cite a URL, I believe that everyone's ability)Ubuntu Installation Reference Tutorial: http://jingyan.baidu.com/article/14bd256e0ca52ebb6d26129c.htmlNote the following points:1, set the virtual machine's IP, click the network connection icon in the bottom right corner of the virtual machine, select "Bridge mode", so as to assign to your LAN IP, this is very important because the back Hadoop to use th

Course Outline and Content introduction:About 35 minutes per lesson, no less than 40 lecturesThe first chapter (11 speak)• Distributed and traditional stand-alone mode· Hadoop background and how it works· Analysis of the working principle of MapReduce• Analysis of the second generation Mr--yarn principle· Cloudera Manager 4.1.2 Installation· Cloudera Hadoop 4.1.2 Installation· CM under the cluster managemen

Hadoop FS: Use the widest range of surfaces to manipulate any file system.Hadoop DFS and HDFs DFS: can only operate on HDFs file system-related (including operations with local FS), which is already deprecated, typically using the latter.The following reference is from StackOverflowFollowing is the three commands which appears same but has minute differences Hadoop fs {args}

Prepare hadoop streaming Hadoop streaming allows you to create and run MAP/reduce jobs with any executable or script as the Mapper and/or the CER Cer. 1. Download hadoop streaming fit for your hadoop version For hadoop2.4.0, you can visit the following website and download the JAR file: Http://mvnrepository.com/art

DISTCP Parallel replication The same version of the Hadoop cluster Hadoop distcp Hdfs//namenode1/foo Hdfs//namenode2/bar Different versions of the Hadoop cluster (HDFs version), executed on the writing side Hadoop distcp Hftp://namenode1:50070/foo Hdfs://namenode2/bar Archive of

Because HDFs is different from a common file system, Hadoop provides a powerful filesystem API to manipulate HDFs. The core classes are Fsdatainputstream and Fsdataoutputstream. Read operation: We use Fsdatainputstream to read the specified file in HDFs (the first experiment), and we also demonstrate the ability to locate the file location of the class, and then start reading the file from the specified location (the second experiment). The code i

Banking, e-government, mobile Internet, education and information industry in the era of "Internet +" Second, the industry mainstream big data technology products and project solutions 7. Introduction to major data solutions at home and abroad8. Comparison of current big data solutions with traditional database scenariosAnalysis of 9.Apache Big Data platform schemeAnalysis of 10.CDH Big Data platform schemeAnalysis of 11.HDP Big Da

.　　 Http://qnalist.com/questions/4884816/how-to-execute-recommenderjob-without-preference-valueHere's someone who solves this: the segmentation of the field in the data file turns out to be a space and a comma. The data file I used was a comma. Or to report the mistake. Workaround: Apache HadoopSetting method Reference: hadoop2.2+mahout0.9-Push Cool http://www.tuicool.com/articles/ryU7FfCdhVersion: 5.1.3 experience feels that the same technology often differs when used with

=org.apache.hadoop.log.metrics.eventcounterLog4j.rootlogger=${hadoop.root.logger},eventcounter,eventcatcherLog.dir=/var/log/hadoop-hdfsLog.file=hadoop-cmf-hdfs-namenode-sht-sgmhadoopnn-01.log.outmax.log.file.size=200mbmax.log.file.backup.index=10Log4j.appender.rfa=org.apache.log4j.rollingfileappenderLog4j.appender.rfa.file=${log.dir}/${log.file}Log4j.appender.rfa.layout=org.apache.log4j.patternlayoutlog4j.a

Pre-Preparation 1. Create a Hadoop-related directory (easy to manage) 2, give Hadoop users and all group permissions to the/opt/* directorysudo chrown-r hadoop:hadoop/opt/*3, JDK installation and configuration configuration Hdfs/yarn/mamreduce1, decompression HadoopTAR-ZXF hadoop-2.5.0.tar.gz-c/opt/modules/(delete Doc's help document, save space) rm-rf/opt/module

-p '-F/HOME/U/.SSH/ID_DSASsh-keygen indicates that the key is generated-T means the specified generated key typeDSA is the meaning of DSA key authentication, that is, the key type-P provides a passphrase-f Specifies the generated key file(4) # cat/home/u/.ssh/id_dsa.pub >>/home/u/.ssh/authorized_keys# Add the public key to the public key file for authentication, Authorized_keys is the public key file for authentication(5) # Ssh-version# Verify that SSH installation is complete and the correct in

additional openssh-clients(3) # Mkdir-p ~/.ssh # Assume that after you install SSH, these folders are not actively generated by yourself, please create your own(4) # ssh-keygen-t Dsa-p "-F ~/.SSH/ID_DSASsh-keygen indicates that the key is generated-T means the specified generated key typeDSA is the meaning of DSA key authentication, that is, the key type-P provides a passphrase-f Specifies the generated key file(5) # cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys# Add the public key to the pub

Build a Hadoop development environment for Fedora 20 1. configuration information: Operating System: fedora 20X86 Eclipse version: eclipse-jee-helios-SR2-linux-gtk.tar.gz (preferably use Galileo or Helios, otherwise there may be compatibility issues) Hadoop version: hadoop-1.1.2.tar.gz Ant: apache-ant-1.9.3-bin.tar.gz 2. Compile the

First, ready to run the required jar package1) Avro-1.7.4.jar2) Commons-cli-1.2.jar3) Commons-codec-1.4.jar4) Commons-collections-3.2.1.jar5) Commons-compress-1.4.1.jar6) Commons-configuration-1.6.jar7) Commons-io-2.4.jar8) Commons-lang-2.6.jar9) Commons-logging-1.2.jar) Commons-math3-3.1.1.jarOne) Commons-net-3.1.jarCurator-client-2.7.1.jar)Curator-recipes-2.7.1.jar)Gson-2.2.4.jar)Guava-20.0.jar)Hadoop-annotations-2.8.0.jar)

When Hadoop was started today, it was discovered that Datanode could not boot, and the following errors were found in the View log: Java.io.ioexception:file/opt/hadoop/tmp/mapred/system/jobtracker.info could only is replicated to 0 nodes, instead o F 1 at Org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock (fsnamesystem.java:1271) at Org.apache.hadoop.hdfs.server.namenode.NameNode.addBl