炼数成金hadoop声明本视频和为网络课程教

Hadoop数据分析平台第4DATAGURU专业数

【】和幻灯片为炼数成金网络课程的教程以外范围散播，违者将可能被法律和经济 DATAGURU专业数

2Masters和slaves文关于secondaryHDFS的操作：命令行操作，HDFSDATAGURU专业数

3DATAGURU专业数据分析

4HDFSAPIDATAGURU专业数据分析

5 publicclassURLCat{static{}publicstaticvoidmain(String[]args)throwsException{InputStreamin=null;tryin=new}finally{}}}DATAGURU专业数

6DATAGURU专业数

7DATAGURU专业数

8DATAGURU专业数据分析

9 importorg.apache.hadoop.io.IOUtils;.URL;DATAGURU专业数

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<propertyname="build"location="build"<property<pathid="hadoop-<fileset<includename="**/*.jar"<fileset<includename="**/*.jar"DATAGURU专业数

续<target<targetDATAGURU专业数

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publicclassHDFSJavaAPIDemo{publicstaticvoidmain(String[]args)throwsIOExceptionConfigurationconf=newConfiguration();FileSystemfs=FileSystem.get(conf);Pathfile=newDATAGURU专业数

续if(fs.exists(file)){}else//WritingtoFSDataOutputStreamoutStream=fs.create(file); etoHDFSJavaAPI!!!");}//ReadingfromStringdata=inStream.readUTF();}DATAGURU专业数

指南》第3章“TheJavaInterface”一DATAGURU专业数

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yum-yinstallgccgcc-c++autoconfDATAGURU专业数

测试HDFSCAPI：一段CDATAGURU专业数据分析

//Followingisalibhdfssampleadaptedfromthesrc/c++/libhdfs/hdfs_write.coftheHadoopdistribution.#include"hdfs.h"intmain(intargc,char**argv)if(!fs){fprintf(stderr,"CannotconnecttoHDFS.\n");}char*fileName=char*message=" etoHDFSCAPI!!!";intsize=strlen(message);DATAGURU专业数

续intexists=hdfsExists(fs,if(exists>-1)fprintf(stdout,"File%sexists!\n",//CreateandopenfileforhdfsFileoutFile=hdfsOpenFile(fs,fileName,O_WRONLY|O_CREAT,0,0,0);if(!outFile){fprintf(stderr,"Failedtoopen%sforwriting!\n",fileName);}//writetohdfsCloseFile(fs,outFile);}DATAGURU专业数

续//OpenfileforhdfsFileinFile=hdfsOpenFile(fs,fileName,O_RDONLY,0,0,0);if(!inFile){fprintf(stderr,"Failedtoopen%sforreading!\n",}char*data=malloc(sizeof(char)*//ReadfromtSizereadSize=hdfsRead(fs,inFile,(void*)data,size);fprintf(stdout,"%s\n",data);return0;DATAGURU专业数

gcchdfs_cpp_demo.c-oDATAGURU专业数

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Dataguru（炼数成金）是专业数据分析，提供教育，，内容，社区，，联网的打破时空限制，把天南地北志同道合的朋友组织在一起交流学习，使到原先孤立的学习组合成