{"id":46788,"date":"2025-07-30T04:07:27","date_gmt":"2025-07-29T20:07:27","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/46788.html"},"modified":"2025-07-30T04:07:27","modified_gmt":"2025-07-29T20:07:27","slug":"hadoop%ef%bc%88%e6%9c%8d%e5%8a%a1%e5%99%a8%e4%bc%aa%e5%88%86%e5%b8%83%e5%bc%8f%e6%90%ad%e5%bb%ba%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/46788.html","title":{"rendered":"hadoop\uff08\u670d\u52a1\u5668\u4f2a\u5206\u5e03\u5f0f\u642d\u5efa\uff09"},"content":{"rendered":"

1. \u62a5\u9519 Windows \u4e0a\u5199\u7684\u811a\u672c \u62f7\u8d1d\u5230 Linux（\u6bd4\u5982 CentOS）\u7cfb\u7edf\u65f6\u4f1a\u51fa\u73b0\u3002<\/h2>\n

bash: .\/set_java_home.sh: \/bin\/bash^M: bad interpreter: No such file or directory<\/p>\n

\u62a5\u9519\u539f\u56e0<\/h3>\n

^M \u662f Windows \u7684\u6362\u884c\u7b26（\\\\r\\\\n）
\nLinux \u4f7f\u7528\u7684\u662f Unix \u683c\u5f0f\u7684\u6362\u884c\u7b26（\\\\n）
\n\u6240\u4ee5\u4f60\u7684\u811a\u672c\u7b2c\u4e00\u884c\u7684 #!\/bin\/bash \u5b9e\u9645\u4e0a\u53d8\u6210\u4e86：
\n#!\/bin\/bash^M<\/p>\n

\u89e3\u51b3\u65b9\u6cd5\u628a\u811a\u672c\u8f6c\u6362\u4e3a Unix \u683c\u5f0f<\/h3>\n

\u4f7f\u7528 dos2unix \u547d\u4ee4<\/p>\n

dos2unix set_java_home.<\/span>sh
\n##\u5982\u679c\u6ca1\u6709\u4e0b\u9762\u5c31\u662f\u5b89\u88c5\u547d\u4ee4<\/span>
\nyum install dos2unix –<\/span>y<\/p>\n

2. \u89e3\u51b3centos\u91cc\u9762\u591a\u7248\u672cjava，\u7edf\u4e2d\u9ed8\u8ba4\u7684 Java（\u901a\u8fc7 alternatives \u6307\u5b9a\u7684）\u81ea\u52a8\u540c\u6b65\u5230 JAVA_HOME，\u4ee5\u4fdd\u8bc1\u4e00\u81f4\u6027\u3002<\/h3>\n

#!\/bin\/bash<\/span><\/p>\n

# \u914d\u7f6e\u4f60\u7684 Java \u5b89\u88c5\u8def\u5f84（\u6309\u4f60\u63d0\u4f9b\u7684\u5185\u5bb9）<\/span>
\nJAVA8_PATH="\/usr\/lib\/jvm\/java-1.8.0-openjdk-1.8.0.412.b08-1.el7_9.x86_64"<\/span>
\nJAVA11_PATH="\/usr\/lib\/jvm\/java-11-openjdk-11.0.23.0.9-2.el7_9.x86_64"<\/span><\/p>\n

# \u53c2\u6570\u6821\u9a8c<\/span>
\nif<\/span> [<\/span>[<\/span> $1<\/span> == "8"<\/span> ]<\/span>]<\/span>;<\/span> then
\n echo<\/span> "🔄 \u6b63\u5728\u5207\u6362\u5230 Java 8…"<\/span>
\n sudo alternatives —<\/span>set<\/span> java $JAVA8_PATH<\/span>\/<\/span>jre\/<\/span>bin\/<\/span>java
\n sudo alternatives —<\/span>set<\/span> javac $JAVA8_PATH<\/span>\/<\/span>bin\/<\/span>javac
\n export JAVA_HOME=$JAVA8_PATH<\/span>
\nelif [<\/span>[<\/span> $1<\/span> == "11"<\/span> ]<\/span>]<\/span>;<\/span> then
\n echo<\/span> "🔄 \u6b63\u5728\u5207\u6362\u5230 Java 11…"<\/span>
\n sudo alternatives —<\/span>set<\/span> java $JAVA11_PATH<\/span>\/<\/span>bin\/<\/span>java
\n sudo alternatives —<\/span>set<\/span> javac $JAVA11_PATH<\/span>\/<\/span>bin\/<\/span>javac
\n export JAVA_HOME=$JAVA11_PATH<\/span>
\nelse<\/span>
\n echo<\/span> "\u274c \u53c2\u6570\u9519\u8bef，\u8bf7\u8f93\u5165 8 \u6216 11，\u4f8b\u5982："<\/span>
\n echo<\/span> " source .\/switch-java.sh 8"<\/span>
\n echo<\/span> " source .\/switch-java.sh 11"<\/span>
\n return<\/span> 1
\nfi<\/p>\n

# \u6e05\u7406\u65e7 PATH \u4e2d\u7684 JAVA_HOME \u76f8\u5173\u8def\u5f84<\/span>
\nexport PATH=$(<\/span>echo<\/span> "$PATH<\/span>"<\/span> |<\/span> awk –<\/span>v RS=: –<\/span>v ORS=: '\/java\/ {next} {print}'<\/span> |<\/span> sed 's\/:$\/\/'<\/span>)<\/span><\/p>\n

# \u52a0\u5165\u65b0 JAVA_HOME\/bin<\/span>
\nexport PATH=$JAVA_HOME<\/span>\/<\/span>bin:$PATH<\/span><\/p>\n

# \u663e\u793a\u7ed3\u679c<\/span>
\necho<\/span> "\u2705 \u5df2\u5207\u6362\u81f3 JAVA_HOME: $JAVA_HOME<\/span>"<\/span>
\njava –<\/span>version<\/p>\n

##\u5230\u5bf9\u5e94\u4f4d\u7f6e\u8fd0\u884c\u8fd9\u4e2a\u811a\u672c，\u524d\u9762\u52a0\u4e0asource，\u5c31\u662f\u5168\u5c40\u8fd0\u884c，\u4e0d\u52a0\u7684\u8bdd\u5c31\u662f\u5728\u4e00\u4e2a\u8fdb\u7a0b\u91cc\u9762\u8fd0\u884c,\u68c0\u67e5\u7684\u65f6\u5019\u53ef\u80fd\u68c0\u67e5\u4e0d\u5230<\/span>
\nsource switch-java<\/span>.<\/span>sh 8
\nsource switch-java<\/span>.<\/span>sh 11<\/p>\n

##\u68c0\u67e5\u547d\u4ee4<\/span>
\necho<\/span> $JAVA_HOME<\/span><\/p>\n

\u4e0b\u56fe\u662f\u5207\u6362Java8\u7684source scripts\/switch-java.sh 8
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\n\u4e0b\u56fe\u662f\u5207\u6362java11\u7684source scripts\/switch-java.sh 11
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\u8bbe\u7f6e\u91cd\u65b0\u542f\u52a8\u670d\u52a1\u5668，\u4ee5\u540e\u9ed8\u8ba4\u7684\u73af\u5883\u53d8\u91cf\u4e2d\u7684java\u7684\u7248\u672c<\/h3>\n

vim ~\/<\/span>.<\/span>bashrc
\n##\u6dfb\u52a0<\/span>
\n# \u6bcf\u6b21\u767b\u5f55\u81ea\u52a8\u8bbe\u7f6e Java 8 \u4e3a\u9ed8\u8ba4(\u4f60\u81ea\u5df1\u4e0a\u9762\u811a\u672c\u5b58\u653e\u7684\u4f4d\u7f6e)<\/span>
\nsource $HOME<\/span>\/<\/span>scripts\/<\/span>switch-java<\/span>.<\/span>sh 8
\n\u6216
\n# \u6bcf\u6b21\u767b\u5f55\u81ea\u52a8\u8bbe\u7f6e Java 11 \u4e3a\u9ed8\u8ba4$HOME\u6307\u7684\u662f\u6839\u76ee\u5f55root<\/span>
\nsource $HOME<\/span>\/<\/span>scripts\/<\/span>switch-java<\/span>.<\/span>sh 11
\n# \u6700\u540e\u6267\u884c<\/span>
\nsource ~\/<\/span>.<\/span>bashrc<\/p>\n

Hadoop<\/h3>\n

\u5b89\u88c5\u6559\u7a0b
\n\u5b98\u7f51\u94fe\u63a5：https:\/\/hadoop.apache.org\/releases.html
\n\u4e0d\u540c\u7684\u5b89\u88c5\u5305\u7684\u533a\u522b<\/p>\n\n\u6587\u4ef6\u540d\u542b\u4e49<\/tr>\n\n\n\n\n\n
source<\/td>\n\u6e90\u7801\u5305，\u9700\u8981\u4f60\u81ea\u5df1\u7f16\u8bd1（\u4e0d\u63a8\u8350\u521d\u5b66\u8005）<\/td>\n<\/tr>\n
binary<\/td>\n\u5b98\u65b9\u7f16\u8bd1\u597d\u7684\u4e8c\u8fdb\u5236\u5305（\u2705\u63a8\u8350）<\/td>\n<\/tr>\n
binary-aarch64<\/td>\n\u9488\u5bf9 ARM \u67b6\u6784\u7684\u7535\u8111（\u5982\u82f9\u679c M1\/M2\u3001\u6811\u8393\u6d3e）<\/td>\n<\/tr>\n
binary-lean<\/td>\n\u7cbe\u7b80\u7248\u672c（\u4e00\u822c\u4e0d\u63a8\u8350）<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u63a8\u8350\u4e0b\u8f7d\u7684\u5b89\u88c5\u5305：Hadoop 3.3.6 binary
\n\u4e0b\u8f7d\u5730\u5740：https:\/\/downloads.apache.org\/hadoop\/common\/hadoop-3.3.6\/hadoop-3.3.6.tar.gz
\n\u4e0b\u8f7d\u5b8c\u6210\u540e\u4e0a\u4f20\u5230\u670d\u52a1\u5668
\n\u6211\u4e0a\u4f20\u7684\u76ee\u5f55\u662f\/usr\/local<\/p>\n

cd \/<\/span>usr\/<\/span>local\/<\/span>
\ntar –<\/span>zxvf hadoop–<\/span>3.<\/span>3.<\/span>6.<\/span>tar.<\/span>gz
\nmv<\/span> hadoop–<\/span>3.<\/span>3.<\/span>6 hadoop<\/p>\n

\u6267\u884c\u5b8c\u4e0a\u8ff0\u547d\u4ee4\u540eHadoop \u5b89\u88c5\u8def\u5f84\u662f \/usr\/local\/hadoop
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\n\u914d\u7f6e\u73af\u5883\u53d8\u91cf\u914d\u7f6e\u6587\u4ef6<\/p>\n

vim ~\/<\/span>.<\/span>bashrc
\n#\u628a\u4e0b\u9762\u7684\u5185\u5bb9\u5199\u5230\u914d\u7f6e\u6587\u4ef6\u91cc\u9762<\/span>
\n#\u6211\u7684java\u5df2\u7ecf\u914d\u7f6e\u4e86，\u4e0d\u9700\u8981\u914d\u7f6ejava\u4e86\u5982\u56fe<\/span>
\n# Hadoop<\/span>
\nexport HADOOP_HOME=\/<\/span>usr\/<\/span>local\/<\/span>hadoop
\nexport PATH=$PATH<\/span>:$HADOOP_HOME<\/span>\/<\/span>bin:$HADOOP_HOME<\/span>\/<\/span>sbin<\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

#\u8ba9\u914d\u7f6e\u6587\u4ef6\u751f\u6548\u91cd\u65b0\u52a0\u8f7d<\/span>
\nsource ~\/<\/span>.<\/span>bashrc
\n#\u6d4b\u8bd5\u662f\u5426\u751f\u6548，\u5982\u4e0b\u56fe\u5df2\u7ecf\u5b89\u88c5\u5b8c\u6210<\/span>
\nhadoop version<\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

hadoop\u7406\u89e3<\/h3>\n

\u5e72\u561b\u7528\u7684：
\n\u662f\u4e3a\u4e86\u89e3\u51b3\u201c\u5355\u673a\u65e0\u6cd5\u5904\u7406\u8d85\u5927\u6570\u636e\u201d\u7684\u95ee\u9898，\u901a\u8fc7\u201c\u5206\u5e03\u5f0f\u5b58\u50a8（HDFS）+ \u5206\u5e03\u5f0f\u8ba1\u7b97（MapReduce）\u201d\u6765\u9ad8\u6548\u5730\u5904\u7406\u6d77\u91cf\u6570\u636e\u3002
\n\u7528\u4e8e\u5b58\u50a8\u548c\u5904\u7406\u8d85\u5927\u89c4\u6a21\u6570\u636e（TB\u3001PB \u7ea7\u522b）\u3002
\n\u539f\u7406：
\n1.\u628a\u5927\u6587\u4ef6\u5207\u6210\u5c0f\u5757\u5206\u5e03\u5b58\u50a8\u5728\u591a\u53f0\u673a\u5668\u4e0a（HDFS）
\n2.\u628a\u4efb\u52a1\u62c6\u6210\u5c0f\u4efb\u52a1\u5e76\u884c\u5904\u7406，\u6700\u540e\u6c47\u603b\u7ed3\u679c（MapReduce）
\n\u6838\u5fc3\u7ec4\u4ef6\u4e0e\u539f\u7406\u56fe\u89e3
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\nHadoop \u6838\u5fc3\u539f\u7406\u7ec4\u4ef6\u89e3\u91ca<\/p>\n\n\u7ec4\u4ef6\u529f\u80fd<\/tr>\n\n\n\n\n\n\n\n\n
HDFS<\/td>\n\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf，\u628a\u5927\u6587\u4ef6\u5207\u6210\u5757\u5b58\u5230\u591a\u53f0\u673a\u5668，\u6bcf\u5757\u9ed8\u8ba4\u4fdd\u5b58 3 \u4efd（\u5bb9\u9519）<\/td>\n<\/tr>\n
MapReduce<\/td>\n\u5206\u5e03\u5f0f\u8ba1\u7b97\u6846\u67b6，\u628a\u4efb\u52a1\u62c6\u6210 map \u2192 shuffle \u2192 reduce，\u5206\u5e03\u5f0f\u5e76\u884c\u5904\u7406<\/td>\n<\/tr>\n
YARN<\/td>\n\u8d44\u6e90\u8c03\u5ea6\u6846\u67b6，\u51b3\u5b9a\u54ea\u4e9b\u673a\u5668\u6267\u884c\u54ea\u4e9b\u4efb\u52a1<\/td>\n<\/tr>\n
NameNode<\/td>\nHDFS \u4e2d\u7684\u201c\u603b\u76ee\u5f55\u201d，\u4fdd\u5b58\u6587\u4ef6\u7ed3\u6784\u3001\u5757\u4f4d\u7f6e（\u5143\u6570\u636e）<\/td>\n<\/tr>\n
DataNode<\/td>\n\u5b9e\u9645\u5b58\u50a8\u6570\u636e\u5757\u7684\u8282\u70b9<\/td>\n<\/tr>\n
ResourceManager<\/td>\n\u7ba1\u7406\u6240\u6709\u8282\u70b9\u8d44\u6e90，\u5206\u914d\u4efb\u52a1<\/td>\n<\/tr>\n
NodeManager<\/td>\n\u6bcf\u4e2a\u8282\u70b9\u7684\u201c\u672c\u5730\u8d44\u6e90\u63a7\u5236\u5668\u201d，\u63a5\u6536\u4efb\u52a1\u5e76\u6267\u884c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u5e94\u7528\u573a\u666f：\u5206\u5e03\u5f0f\u5b58\u50a8\u548c\u6d77\u91cf\u6570\u636e\u8ba1\u7b97，\u7528\u5728\u201c\u5927\u6570\u636e\u201d\u573a\u666f\u4e0b\u3002<\/p>\n\n\u573a\u666f\u63cf\u8ff0<\/tr>\n\n\n\n\n\n\n\n\n
\u65e5\u5fd7\u5206\u6790<\/td>\n\u7f51\u7ad9\u3001APP\u3001\u5927\u578b\u5e73\u53f0\u7684\u7528\u6237\u8bbf\u95ee\u65e5\u5fd7\u5206\u6790（TB \u7ea7）<\/td>\n<\/tr>\n
\u6570\u636e\u4ed3\u5e93（Hive）<\/td>\n\u7528 SQL \u5904\u7406\u6d77\u91cf\u7ed3\u6784\u5316\u6570\u636e<\/td>\n<\/tr>\n
ETL \u5904\u7406（+Sqoop）<\/td>\n\u6570\u636e\u62bd\u53d6（\u4ece MySQL \u5bfc\u5165）\u3001\u8f6c\u6362\u3001\u52a0\u8f7d<\/td>\n<\/tr>\n
\u641c\u7d22\u5f15\u64ce\u722c\u866b<\/td>\n\u628a\u6293\u53d6\u7f51\u9875\u5206\u5e03\u5f0f\u5904\u7406\u3001\u5b58\u50a8<\/td>\n<\/tr>\n
\u56fe\u50cf\u89c6\u9891\u5904\u7406<\/td>\n\u591a\u8282\u70b9\u540c\u65f6\u5904\u7406\u56fe\u7247\/\u89c6\u9891\u6570\u636e（\u5982\u538b\u7f29\u3001\u8f6c\u7801）<\/td>\n<\/tr>\n
\u673a\u5668\u5b66\u4e60\u9884\u5904\u7406<\/td>\n\u5bf9\u5927\u89c4\u6a21\u8bad\u7ec3\u6570\u636e\u8fdb\u884c MapReduce \u5904\u7406<\/td>\n<\/tr>\n
\u4e92\u8054\u7f51\u4f01\u4e1a\u5206\u6790\u7cfb\u7edf<\/td>\n\u6dd8\u5b9d\u3001\u767e\u5ea6\u3001\u817e\u8baf\u3001\u5934\u6761\u7b49\u65e9\u671f\u90fd\u7528\u4e86 Hadoop \u642d\u5efa\u79bb\u7ebf\u6570\u636e\u5904\u7406\u5e73\u53f0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Hadoop\u4f18\u52bf<\/p>\n\n\u4f18\u52bf\u8bf4\u660e<\/tr>\n\n\n\n\n\n\n
\u9ad8\u53ef\u6269\u5c55<\/td>\n\u52a0\u673a\u5668\u5c31\u80fd\u6269\u5bb9（\u7ebf\u6027\u6269\u5c55）<\/td>\n<\/tr>\n
\u9ad8\u5bb9\u9519<\/td>\n\u81ea\u52a8\u5907\u4efd\u526f\u672c，\u8282\u70b9\u5b95\u4e86\u4e5f\u4e0d\u4f1a\u4e22\u6570\u636e<\/td>\n<\/tr>\n
\u5927\u89c4\u6a21\u5904\u7406<\/td>\n\u652f\u6301 TB\/PB \u7ea7\u522b\u6570\u636e\u5904\u7406<\/td>\n<\/tr>\n
\u9ad8\u6027\u4ef7\u6bd4<\/td>\n\u53ef\u7528\u666e\u901a\u5546\u7528\u670d\u52a1\u5668\u6784\u5efa\u5206\u5e03\u5f0f\u5e73\u53f0<\/td>\n<\/tr>\n
\u5f00\u6e90\u751f\u6001\u4e30\u5bcc<\/td>\nHive\u3001Spark\u3001HBase\u3001Flink \u90fd\u80fd\u96c6\u6210 Hadoop \u5b58\u50a8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4e0d\u9002\u5408\u7684\u5730\u65b9<\/p>\n\n\u4e0d\u9002\u5408\u573a\u666f\u8bf4\u660e<\/tr>\n\n\n\n\n\n
\u5b9e\u65f6\u8ba1\u7b97（ms \u7ea7）<\/td>\nHadoop \u662f\u79bb\u7ebf\u6279\u5904\u7406，\u5ef6\u8fdf\u5206\u949f\u7ea7<\/td>\n<\/tr>\n
\u5c0f\u6570\u636e\u573a\u666f<\/td>\n\u542f\u52a8 MapReduce \u6bd4\u5904\u7406\u672c\u8eab\u8fd8\u6162<\/td>\n<\/tr>\n
\u9ad8\u9891\u4f4e\u5ef6\u8fdf\u7cfb\u7edf<\/td>\n\u6bd4\u5982\u91d1\u878d\u4ea4\u6613\u7cfb\u7edf\u3001\u79d2\u6740\u7cfb\u7edf，\u4e0d\u9002\u5408 Hadoop<\/td>\n<\/tr>\n
\u9ad8\u5e76\u53d1 OLTP<\/td>\nHadoop \u4e0d\u652f\u6301\u4e8b\u52a1\u5904\u7406\u548c\u9ad8\u5e76\u53d1\u8bfb\u5199\u64cd\u4f5c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u8fd0\u884c\u6a21\u5f0f<\/p>\n\n\u6a21\u5f0f\u662f\u5426\u9700\u8981\u914d\u7f6e XML\u662f\u5426\u9700\u8981\u521b\u5efa tmp\u3001namenode\u3001datanode \u7b49\u76ee\u5f55\u662f\u5426\u9700\u8981\u542f\u52a8\u670d\u52a1<\/tr>\n\n\n\n\n
1. \u672c\u5730\u6a21\u5f0f（Local Mode）<\/td>\n\u274c \u4e0d\u9700\u8981<\/td>\n\u274c \u4e0d\u9700\u8981<\/td>\n\u274c \u4e0d\u9700\u8981<\/td>\n<\/tr>\n
2. \u4f2a\u5206\u5e03\u5f0f\u6a21\u5f0f<\/td>\n\u2705 \u9700\u8981<\/td>\n\u2705 \u5fc5\u987b\u521b\u5efa<\/td>\n\u2705 \u542f\u52a8 HDFS\/YARN<\/td>\n<\/tr>\n
3. \u771f\u5206\u5e03\u5f0f\u6a21\u5f0f<\/td>\n\u2705 \u9700\u8981<\/td>\n\u2705 \u5fc5\u987b\u521b\u5efa（\u4e0d\u540c\u8282\u70b9）<\/td>\n\u2705 \u542f\u52a8\u591a\u8282\u70b9\u670d\u52a1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

hadoop\u90e8\u7f72\u4f2a\u5206\u5e03\u5f0f<\/h3>\n

\u7b2c\u4e00\u6b65\u521b\u5efa Hadoop \u6240\u9700\u7684\u5de5\u4f5c\u76ee\u5f55<\/p>\n

mkdir –<\/span>p \/<\/span>usr\/<\/span>local\/<\/span>hadoop\/<\/span>tmp
\nmkdir –<\/span>p \/<\/span>usr\/<\/span>local\/<\/span>hadoop\/<\/span>hdfs\/<\/span>namenode
\nmkdir –<\/span>p \/<\/span>usr\/<\/span>local\/<\/span>hadoop\/<\/span>hdfs\/<\/span>datanode<\/p>\n\n\u76ee\u5f55\u4f5c\u7528<\/tr>\n\n\n\n\n
\/usr\/local\/hadoop\/tmp<\/td>\nHadoop \u8fd0\u884c\u65f6\u7684\u4e34\u65f6\u6587\u4ef6\u76ee\u5f55（\u5982\u9501\u6587\u4ef6\u3001\u7f13\u5b58）<\/td>\n<\/tr>\n
\/usr\/local\/hadoop\/hdfs\/namenode<\/td>\n\u5b58\u50a8 NameNode \u5143\u6570\u636e（\u5982\u6587\u4ef6\u76ee\u5f55\u7ed3\u6784\u3001\u5757\u4f4d\u7f6e）<\/td>\n<\/tr>\n
\/usr\/local\/hadoop\/hdfs\/datanode<\/td>\n\u5b58\u50a8 DataNode \u7684\u5b9e\u9645\u6570\u636e\u5757（HDFS \u6587\u4ef6\u6570\u636e）<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NameNode \u8ba4\u4e3a \/usr\/local\/hadoop\/hdfs\/namenode \u662f\u5b83\u7684\u6301\u4e45\u5b58\u50a8\u4f4d\u7f6e\u3002
\nDataNode \u628a\u6570\u636e\u5757\u5199\u5165 \/usr\/local\/hadoop\/hdfs\/datanode\u3002
\ntmp \u7528\u6765\u7f13\u5b58\u3001\u5199\u65e5\u5fd7\u3001\u5199\u8fd0\u884c\u65f6\u4e2d\u95f4\u6587\u4ef6\u3002<\/p>\n

\u7b2c 2 \u6b65：\u7f16\u8f91\u914d\u7f6e\u6587\u4ef6
\n\u914d\u7f6e\u6587\u4ef6\u8def\u5f84：\/usr\/local\/hadoop\/etc\/hadoop\/
\n2.1. core-site.xml<\/p>\n

vim \/<\/span>usr\/<\/span>local\/<\/span>hadoop\/<\/span>etc\/<\/span>hadoop\/<\/span>core–<\/span>site.<\/span>xml<\/p>\n

\u5185\u5bb9：\u9700\u8981\u5916\u90e8\u8bbf\u95ee\u914d\u7f6ehdfs:\/\/\u4e3b\u673a\u540d\u79f0:9000<\/p>\n

<<\/span>configuration<\/span>><\/span><\/span>
\n <<\/span>property<\/span>><\/span><\/span>
\n <<\/span>name<\/span>><\/span><\/span>fs.defaultFS<\/<\/span>name<\/span>><\/span><\/span>
\n <<\/span>value<\/span>><\/span><\/span>hdfs:\/\/\u4e3b\u673a\u540d\u79f0（\u6216\u8005\u662f\u4f60\u7684ip\u6ce8\u610f\u8981\u548c\u4e0b\u9762\u7684\u6587\u4ef6\u4e2d\u7684\u4fdd\u6301\u4e00\u81f4）:9000<\/<\/span>value<\/span>><\/span><\/span>
\n <\/<\/span>property<\/span>><\/span><\/span><\/p>\n

<<\/span>property<\/span>><\/span><\/span>
\n <<\/span>name<\/span>><\/span><\/span>hadoop.tmp.dir<\/<\/span>name<\/span>><\/span><\/span>
\n <<\/span>value<\/span>><\/span><\/span>\/usr\/local\/hadoop\/tmp<\/<\/span>value<\/span>><\/span><\/span>
\n <\/<\/span>property<\/span>><\/span><\/span>
\n<\/<\/span>configuration<\/span>><\/span><\/span><\/p>\n

2.2 hdfs-site.xml<\/p>\n

vim \/<\/span>usr\/<\/span>local\/<\/span>hadoop\/<\/span>etc\/<\/span>hadoop\/<\/span>hdfs–<\/span>site.<\/span>xml<\/p>\n

\u5185\u5bb9：<\/p>\n

<<\/span>configuration<\/span>><\/span><\/span><\/p>\n

<!– \u8bbe\u7f6e\u526f\u672c\u6570\u4e3a1（\u4f2a\u5206\u5e03\u5f0f） –><\/span>
\n <<\/span>property<\/span>><\/span><\/span>
\n <<\/span>name<\/span>><\/span><\/span>dfs.replication<\/<\/span>name<\/span>><\/span><\/span>
\n <<\/span>value<\/span>><\/span><\/span>1<\/<\/span>value<\/span>><\/span><\/span>
\n <\/<\/span>property<\/span>><\/span><\/span><\/p>\n

<!– NameNode \u5b58\u50a8\u76ee\u5f55 –><\/span>
\n <<\/span>property<\/span>><\/span><\/span>
\n <<\/span>name<\/span>><\/span><\/span>dfs.namenode.name.dir<\/<\/span>name<\/span>><\/span><\/span>
\n <<\/span>value<\/span>><\/span><\/span>file:\/usr\/local\/hadoop\/hdfs\/namenode<\/<\/span>value<\/span>><\/span><\/span>
\n <\/<\/span>property<\/span>><\/span><\/span><\/p>\n

<!– DataNode \u5b58\u50a8\u76ee\u5f55 –><\/span>
\n <<\/span>property<\/span>><\/span><\/span>
\n <<\/span>name<\/span>><\/span><\/span>dfs.datanode.data.dir<\/<\/span>name<\/span>><\/span><\/span>
\n <<\/span>value<\/span>><\/span><\/span>file:\/usr\/local\/hadoop\/hdfs\/datanode<\/<\/span>value<\/span>><\/span><\/span>
\n <\/<\/span>property<\/span>><\/span><\/span><\/p>\n

<!– DataNode \u6ce8\u518c\u4f7f\u7528\u516c\u7f51IP（\u91cd\u8981） –><\/span>
\n <<\/span>property<\/span>><\/span><\/span>
\n <<\/span>name<\/span>><\/span><\/span>dfs.datanode.hostname<\/<\/span>name<\/span>><\/span><\/span>
\n <<\/span>value<\/span>><\/span><\/span>\u4f60\u81ea\u5df1\u7684\u4e3b\u673a\u540d\u79f0\u6216\u8005\u662fip<\/<\/span>value<\/span>><\/span><\/span>
\n <\/<\/span>property<\/span>><\/span><\/span><\/p>\n

<!– DataNode \u4e0e\u5ba2\u6237\u7aef\u901a\u4fe1\u4f7f\u7528 hostname（IP） –><\/span>
\n <<\/span>property<\/span>><\/span><\/span>
\n <<\/span>name<\/span>><\/span><\/span>dfs.datanode.use.datanode.hostname<\/<\/span>name<\/span>><\/span><\/span>
\n <<\/span>value<\/span>><\/span><\/span>true<\/<\/span>value<\/span>><\/span><\/span>
\n <\/<\/span>property<\/span>><\/span><\/span><\/p>\n

<!– \u5ba2\u6237\u7aef\u4f7f\u7528 hostname（IP） \u8bbf\u95ee DataNode –><\/span>
\n <<\/span>property<\/span>><\/span><\/span>
\n <<\/span>name<\/span>><\/span><\/span>dfs.client.use.datanode.hostname<\/<\/span>name<\/span>><\/span><\/span>
\n <<\/span>value<\/span>><\/span><\/span>true<\/<\/span>value<\/span>><\/span><\/span>
\n <\/<\/span>property<\/span>><\/span><\/span><\/p>\n

<!– \u5f00\u653e NameNode RPC（\u7ed1\u5b9a\u5230\u6240\u6709\u7f51\u5361） –><\/span>
\n <<\/span>property<\/span>><\/span><\/span>
\n <<\/span>name<\/span>><\/span><\/span>dfs.namenode.rpc-bind-host<\/<\/span>name<\/span>><\/span><\/span>
\n <<\/span>value<\/span>><\/span><\/span>0.0.0.0<\/<\/span>value<\/span>><\/span><\/span>
\n <\/<\/span>property<\/span>><\/span><\/span><\/p>\n

<!– \u53ef\u9009：\u5173\u95ed\u4e3b\u673a\u540d\u6821\u9a8c，\u5141\u8bb8 IP \u6ce8\u518c –><\/span>
\n <<\/span>property<\/span>><\/span><\/span>
\n <<\/span>name<\/span>><\/span><\/span>dfs.namenode.reject-unresolved-datanode-hostname<\/<\/span>name<\/span>><\/span><\/span>
\n <<\/span>value<\/span>><\/span><\/span>false<\/<\/span>value<\/span>><\/span><\/span>
\n <\/<\/span>property<\/span>><\/span><\/span><\/p>\n

<\/<\/span>configuration<\/span>><\/span><\/span><\/p>\n

2.3 mapred-site.xml<\/p>\n

vim \/<\/span>usr\/<\/span>local\/<\/span>hadoop\/<\/span>etc\/<\/span>hadoop\/<\/span>mapred–<\/span>site.<\/span>xml<\/p>\n

\u5185\u5bb9：<\/p>\n

<<\/span>configuration<\/span>><\/span><\/span>
\n <<\/span>property<\/span>><\/span><\/span>
\n <<\/span>name<\/span>><\/span><\/span>mapreduce.framework.name<\/<\/span>name<\/span>><\/span><\/span>
\n <<\/span>value<\/span>><\/span><\/span>yarn<\/<\/span>value<\/span>><\/span><\/span>
\n <\/<\/span>property<\/span>><\/span><\/span>
\n<\/<\/span>configuration<\/span>><\/span><\/span><\/p>\n

2.4 yarn-site.xml<\/p>\n

vim \/<\/span>usr\/<\/span>local\/<\/span>hadoop\/<\/span>etc\/<\/span>hadoop\/<\/span>yarn–<\/span>site.<\/span>xml<\/p>\n

\u5185\u5bb9：<\/p>\n

<<\/span>configuration<\/span>><\/span><\/span>
\n <<\/span>property<\/span>><\/span><\/span>
\n <<\/span>name<\/span>><\/span><\/span>yarn.nodemanager.aux-services<\/<\/span>name<\/span>><\/span><\/span>
\n <<\/span>value<\/span>><\/span><\/span>mapreduce_shuffle<\/<\/span>value<\/span>><\/span><\/span>
\n <\/<\/span>property<\/span>><\/span><\/span>
\n<\/<\/span>configuration<\/span>><\/span><\/span><\/p>\n

\u7b2c\u4e09\u6b65\u914d\u7f6e\u514d\u5bc6\u767b\u5f55<\/p>\n

ssh–<\/span>keygen –<\/span>t rsa # \u5168\u90e8\u56de\u8f66<\/span>
\ncat<\/span> ~\/<\/span>.<\/span>ssh\/<\/span>id_rsa.<\/span>pub >> ~\/<\/span>.<\/span>ssh\/<\/span>authorized_keys
\nchmod 600 ~\/<\/span>.<\/span>ssh\/<\/span>authorized_keys
\nssh localhost # \u786e\u4fdd\u4e0d\u9700\u8981\u8f93\u5165\u5bc6\u7801<\/span><\/p>\n

\u7b2c\u56db\u6b65：\u683c\u5f0f\u5316 HDFS（\u53ea\u505a\u4e00\u6b21）<\/p>\n

hdfs namenode –<\/span>format
\n#\u540e\u9762\u5982\u679c\u518d\u9700\u8981\u683c\u5f0f\u5316\u9700\u8981\u5173\u95ed\u8fd9\u4e24\u4e2a<\/span>
\nstop-dfs<\/span>.<\/span>sh
\nstop-yarn<\/span>.<\/span>sh<\/p>\n

\u7b2c\u4e94\u6b65：\u542f\u52a8\u547d\u4ee4<\/p>\n

#\u505c\u6b62\u547d\u4ee4<\/span>
\nstop-dfs<\/span>.<\/span>sh
\n#\u542f\u52a8\u547d\u4ee4<\/span>
\nstart-dfs<\/span>.<\/span>sh
\nstart-yarn<\/span>.<\/span>sh
\n#jps\u7528\u4e8e\u5217\u51fa\u5f53\u524d\u7cfb\u7edf\u4e2d\u6240\u6709\u7684HotSpot Java\u865a\u62df\u673a\u8fdb\u7a0b<\/span>
\njps # \u67e5\u770b\u670d\u52a1\u662f\u5426\u6b63\u5e38<\/span><\/p>\n

## \u62a5\u9519<\/span>
\nERROR: Attempting to operate on hdfs namenode as root
\nERROR: but there is no HDFS_NAMENODE_USER defined.<\/span> Aborting operation.<\/span>
\n#\u4f60\u5728\u7528 root \u7528\u6237\u6267\u884c start-dfs.sh \u547d\u4ee4<\/span>
\n#Hadoop \u9ed8\u8ba4\u4e0d\u5141\u8bb8\u4f60\u7528 root \u6765\u542f\u52a8 HDFS \u5b88\u62a4\u8fdb\u7a0b（\u5b89\u5168\u8003\u8651）<\/span><\/p>\n

## \u4e0b\u9762\u662f\u89e3\u51b3\u65b9\u6cd5 \u4ee5\u53ca\u5176\u4ed6\u547d\u4ee4<\/span>
\n#\u521b\u5efa\u7528\u6237<\/span>
\nuseradd hadoop
\npasswd hadoop
\n#\u628aHadoop \u5b89\u88c5\u76ee\u5f55\u6743\u9650\u6539\u7ed9 hadoop \u7528\u6237：<\/span>
\nchown –<\/span>R hadoop:hadoop \/<\/span>usr\/<\/span>local\/<\/span>hadoop
\n#\u7ed9hadoop\u7528\u6237\u8d4b\u4e88sudo\u6743\u9650（centos7）<\/span>
\nusermod –<\/span>aG wheel hadoop
\n#\u5176\u4ed6\u5173\u4e8e\u9632\u706b\u5899\u7684\u547d\u4ee4\u53ef\u9009<\/span>
\nsudo firewall–<\/span>cmd —<\/span>permanent —<\/span>add-port<\/span>=9000\/<\/span>tcp
\nsudo firewall–<\/span>cmd —<\/span>reload
\nsudo firewall–<\/span>cmd —<\/span>list–<\/span>ports
\n#\u5207\u6362\u7528\u6237<\/span>
\nsu –<\/span> hadoop
\nvim ~\/<\/span>.<\/span>bashrc #\u7f16\u8f91，\u4e0d\u540c\u7528\u6237\u4e0d\u540c\u7684\u73af\u5883\u53d8\u91cf\u6587\u4ef6<\/span>
\n#\u5207\u6362\u5b8c\u7528\u6237\u540e\u4ece\u65b0\u914d\u7f6ejava\u548chadoop\u7684\u73af\u5883\u53d8\u91cf（\u5982\u4e0b\u56fe）<\/span>
\n#\u6211Java\u7684\u73af\u5883\u53d8\u91cf\u662f\u4e00\u4e2a\u811a\u672c\u6587\u4ef6（Java8 \u548cjava11\u9700\u8981\u5207\u6362），\u6839\u636e\u81ea\u5df1\u7684\u9700\u6c42\u914d\u7f6e<\/span>
\n#\u4fdd\u5b58\u540e\u518d\u6267\u884c（\u8ba9\u914d\u7f6e\u6587\u4ef6\u751f\u6548）<\/span>
\nsource ~\/<\/span>.<\/span>bashrc
\n#\u9a8c\u8bc1\u662f\u5426\u751f\u6548<\/span>
\necho<\/span> $JAVA_HOME<\/span>
\necho<\/span> $HADOOP_HOME<\/span>
\nwhich hadoop<\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\u603b\u603b\u7ed3：hadoop\u662f\u4ec0\u4e48，\u662f\u7528\u6765\u5904\u7406\u6d77\u91cf\u6570\u636e\u7684，\u7136\u540e\u6709\u4e24\u5927\u6838\u5fc3\u6a21\u5757，\u4e00\u4e2a\u5c31\u662f，\u5206\u5e03\u5f0f\u6587\u4ef6HDFS（Hadoop Distributed File System），\u91cc\u9762\u6709\u4e24\u79cd\u8282\u70b9NameNode\u548cDataNode ，HDFS\u4f1a\u628a\u4e00\u4e2a\u5927\u6587\u4ef6\u5206\u6210\u5757（block\u9ed8\u8ba4\u5927\u5c0f\u662f128MB）\u6bcf\u4e2a\u5757\u4f1a\u6709\u591a\u4e2a\u526f\u672c\u5b58\u5728\u4e0d\u540c\u7684\u670d\u52a1\u5668\u4e0a（\u9ed8\u8ba43\u4e2a），\u5177\u4f53\u7684\u5185\u5bb9\u5b58\u5728DataNode\u91cc\u9762，\u800cNameNode\u76f8\u5f53\u4e8eDataNode\u7684\u76ee\u5f55\u3002<\/p>\n

hadoop\u64cd\u4f5c\u4e0a\u4f20，\u4e0b\u8f7d，\u8bfb\u53d6\u6587\u4ef6\u7684\u547d\u4ee4<\/h3>\n

#\u67e5\u770bHDFS\u7684\u6839\u76ee\u5f55<\/span>
\nhdfs dfs –<\/span>ls<\/span> \/<\/span>
\n# \u521b\u5efa\u7528\u6237\u76ee\u5f55<\/span>
\nhdfs dfs –<\/span>mkdir –<\/span>p \/<\/span>user\/<\/span>hadoop
\n# \u521b\u5efa\u4e34\u65f6\u76ee\u5f55（\u67d0\u4e9b\u7a0b\u5e8f\u53ef\u80fd\u4f1a\u7528\u5230）<\/span>
\nhdfs dfs –<\/span>mkdir \/<\/span>tmp
\n# \u8bbe\u7f6e\u4e34\u65f6\u76ee\u5f55\u6743\u9650\u4e3a 777（\u67d0\u4e9b\u7a0b\u5e8f\u4f9d\u8d56）<\/span>
\nhdfs dfs –<\/span>chmod –<\/span>R 777 \/<\/span>tmp<\/p>\n

\u4e0a\u4f20\u6587\u4ef6
\nhdfs dfs –<\/span>put \/<\/span>\u672c\u5730\u8def\u5f84\/<\/span>\u6587\u4ef6\u540d \/<\/span>HDFS\u76ee\u6807\u8def\u5f84
\n#\u5217\u5b50<\/span>
\nhdfs dfs –<\/span>put \/<\/span>home\/<\/span>hadoop\/<\/span>files\/<\/span>\u5251\u676501.<\/span>mp4 \/<\/span>user\/<\/span>hadoop\/<\/span>
\n#\u67e5\u770b\u662f\u5426\u4e0a\u4f20\u6210\u529f<\/span>
\nhdfs dfs –<\/span>ls<\/span> \/<\/span>user\/<\/span>hadoop\/<\/span><\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

# \u67e5\u770b\u6587\u4ef6\u5757\u548c\u4f4d\u7f6e<\/span>
\nhdfs fsck \/<\/span>user\/<\/span>hadoop\/<\/span>\u5251\u676501.<\/span>mp4 –<\/span>files –<\/span>blocks –<\/span>locations
\n\u8f93\u51fa：
\nStatus: HEALTHY
\n# \u2705 \u6587\u4ef6\u5065\u5eb7，\u672a\u7f3a\u5757\u3001\u672a\u635f\u574f<\/span><\/p>\n

Number of data<\/span>–<\/span>nodes:1
\n# 📦 \u5f53\u524d\u96c6\u7fa4\u4e2d\u53ea\u67091\u4e2a DataNode（\u5355\u8282\u70b9\u4f2a\u5206\u5e03\u5f0f）<\/span><\/p>\n

Number of racks:1
\n# 📶 \u5f53\u524d\u4ec5\u914d\u7f6e\u4e861\u4e2a\u673a\u67b6（Rack）<\/span><\/p>\n

Total dirs:0
\n# 📁 \u603b\u5171\u76ee\u5f55\u6570\u91cf\u4e3a0（\u56e0\u4e3a\u53ea\u68c0\u67e5\u4e86\u4e00\u4e2a\u6587\u4ef6）<\/span><\/p>\n

Total symlinks:0
\n# 🔗 \u7b26\u53f7\u94fe\u63a5\u6570\u91cf\u4e3a0（HDFS\u4e2d\u5f88\u5c11\u4f7f\u7528\u7b26\u53f7\u94fe\u63a5）<\/span><\/p>\n

Replicated Blocks:
\n Total size:2655188930 B
\n # 📄 \u6587\u4ef6\u603b\u5927\u5c0f\u7ea6 2.65GB<\/span><\/p>\n

Total files:1
\n # 📁 \u672c\u6b21\u68c0\u67e5\u7684\u6587\u4ef6\u6570\u91cf<\/span><\/p>\n

Total blocks (<\/span>validated)<\/span>:20 (<\/span>avg.<\/span> block size 132759446 B)<\/span>
\n # 📦 \u6587\u4ef6\u88ab\u5207\u5206\u4e3a20\u4e2a\u5757，\u6bcf\u4e2a\u5757\u5e73\u5747\u7ea6132MB（\u7b26\u5408HDFS\u9ed8\u8ba4128MB）<\/span><\/p>\n

Minimally replicated blocks:20 (<\/span>100.<\/span>0 %<\/span>)<\/span>
\n # \u2705 \u6240\u6709\u5757\u81f3\u5c11\u67091\u4e2a\u526f\u672c，\u7b26\u5408\u8bbe\u5b9a\u7684\u526f\u672c\u6570<\/span><\/p>\n

Over–<\/span>replicated blocks:0 (<\/span>0.<\/span>0 %<\/span>)<\/span>
\n # 📈 \u6ca1\u6709\u526f\u672c\u6570\u91cf\u8d85\u51fa\u914d\u7f6e\u7684\u5757<\/span><\/p>\n

Under–<\/span>replicated blocks:0 (<\/span>0.<\/span>0 %<\/span>)<\/span>
\n # 📉 \u6ca1\u6709\u526f\u672c\u6570\u91cf\u4e0d\u8db3\u7684\u5757<\/span><\/p>\n

Mis–<\/span>replicated blocks:0 (<\/span>0.<\/span>0 %<\/span>)<\/span>
\n # \u26a0\ufe0f \u5757\u6ca1\u6709\u5206\u5e03\u4e0d\u5408\u7406（\u5982\u6240\u6709\u526f\u672c\u90fd\u96c6\u4e2d\u5728\u540c\u4e00\u8282\u70b9）\u7684\u95ee\u9898<\/span><\/p>\n

Default replication factor:1
\n # 🔁 \u5f53\u524d\u7cfb\u7edf\u9ed8\u8ba4\u526f\u672c\u6570\u4e3a1（\u5355\u8282\u70b9\u65e0\u6cd5\u8bbe\u7f6e\u66f4\u9ad8）<\/span><\/p>\n

Average block replication:1.<\/span>0
\n # 📊 \u6240\u6709\u5757\u5e73\u5747\u67091\u4e2a\u526f\u672c<\/span><\/p>\n

Missing blocks:0
\n # \u274c \u6ca1\u6709\u7f3a\u5931\u7684\u5757<\/span><\/p>\n

Corrupt blocks:0
\n # \u274c \u6ca1\u6709\u635f\u574f\u7684\u5757<\/span><\/p>\n

Missing replicas:0 (<\/span>0.<\/span>0 %<\/span>)<\/span>
\n # \u274c \u6240\u6709\u526f\u672c\u90fd\u5b58\u5728，\u6ca1\u6709\u526f\u672c\u7f3a\u5931<\/span><\/p>\n

Blocks queued for<\/span> replication:0
\n # 📋 \u6ca1\u6709\u7b49\u5f85\u590d\u5236\u7684\u5757（\u8bf4\u660e\u526f\u672c\u5145\u8db3）<\/span><\/p>\n

Erasure Coded Block Groups:
\n Total size:0 B
\n Total files:0
\n Total block groups (<\/span>validated)<\/span>:0
\n Minimally erasure–<\/span>coded block groups:0
\n Over–<\/span>erasure–<\/span>coded block groups:0
\n # \u2733\ufe0f \u672a\u4f7f\u7528 Erasure Coding（\u7ea0\u5220\u7801），\u8fd9\u662f\u4e00\u79cd\u9ad8\u7ea7\u5b58\u50a8\u65b9\u5f0f，\u7528\u4e8e\u8282\u7701\u7a7a\u95f4，\u5f53\u524d\u672a\u542f\u7528<\/span><\/p>\n

# \u67e5\u770b\u96c6\u7fa4\u526f\u672c\u9ed8\u8ba4\u914d\u7f6e<\/span>
\nhdfs getconf –<\/span>confKey dfs.<\/span>replication
\n# \u8f93\u51fa\u6587\u4ef6\u5927\u5c0f<\/span>
\nhdfs dfs –<\/span>du –<\/span>h \/<\/span>user\/<\/span>hadoop\/<\/span>
\n#\u4e0b\u8f7d<\/span>
\nhdfs dfs –<\/span>get \/<\/span>user\/<\/span>hadoop\/<\/span>\u5251\u676501.<\/span>mp4 .<\/span>\/<\/span>
\n#\u9884\u89c8\u5185\u5bb9<\/span>
\n#\u67e5\u770b\u6587\u4ef6\u7684\u5f00\u5934<\/span>
\nhdfs dfs –<\/span>cat<\/span> \/<\/span>user\/<\/span>hadoop\/<\/span>data1.<\/span>txt |<\/span> head
\n#\u67e5\u770b\u7ed3\u5c3e（\u65e5\u5fd7）<\/span>
\nhdfs dfs –<\/span>tail \/<\/span>user\/<\/span>hadoop\/<\/span>log.<\/span>txt
\n#\u67e5\u770b\u524d\u51e0\u884c<\/span>
\nhdfs dfs –<\/span>cat<\/span> \/<\/span>user\/<\/span>hadoop\/<\/span>data2.<\/span>csv |<\/span> head –<\/span>n 5
\n#\u8fc7\u6ee4<\/span>
\nhdfs dfs –<\/span>ls<\/span> \/<\/span>user\/<\/span>hadoop\/<\/span> |<\/span> grep '\\\\.csv'<\/span>
\n#\u67e5\u627e<\/span>
\nhdfs dfs –<\/span>find \/<\/span> –<\/span>name "*.csv"<\/span>
\n#\u67e5\u627e\u7279\u5b9a\u540d\u5b57<\/span>
\nhdfs dfs –<\/span>find \/<\/span> –<\/span>name "data2025-*.txt"<\/span>
\n#\u5220\u9664<\/span>
\nhdfs dfs –<\/span>rm<\/span> \/<\/span>user\/<\/span>hadoop\/<\/span>\u5251\u676501.<\/span>mp4
\n#\u7528 hdfs dfs -ls \u67e5\u770b\u4e0a\u4f20\u4e86\u54ea\u4e9b\u6587\u4ef6<\/span>
\n#\u7528 -cat\u3001-tail\u3001head \u67e5\u770b\u5185\u5bb9\u5224\u65ad\u662f\u4e0d\u662f\u4f60\u8981\u7684<\/span>
\n#\u7528 -du -h \u770b\u5927\u5c0f，\u6216 grep \/ find \u8f85\u52a9\u7b5b\u9009<\/span><\/p>\n

Hadoop\u7aef\u53e3\u4ecb\u7ecd<\/h3>\n\n\u7aef\u53e3\u7c7b\u578b\u670d\u52a1\u7528\u6cd5\u662f\u5426\u6d4f\u89c8\u5668\u80fd\u8bbf\u95ee<\/tr>\n\n\n\n\n\n
9000<\/td>\nRPC\u901a\u4fe1\u7aef\u53e3<\/td>\nNameNode<\/td>\nHadoop \u547d\u4ee4\u901a\u4fe1（\u5982 put\u3001get\u3001ls）<\/td>\n\u274c \u4e0d\u884c，\u540e\u53f0\u670d\u52a1\u7aef\u53e3<\/td>\n<\/tr>\n
9870<\/td>\nWeb UI<\/td>\nNameNode Web<\/td>\n\u6d4f\u89c8 HDFS \u76ee\u5f55\u3001\u67e5\u770b\u5757\u4f4d\u7f6e<\/td>\n\u2705 \u53ef\u4ee5<\/td>\n<\/tr>\n
9864<\/td>\nWeb UI<\/td>\nDataNode Web<\/td>\n\u67e5\u770b DataNode \u72b6\u6001\u548c\u6570\u636e\u5757<\/td>\n\u2705 \u53ef\u4ee5<\/td>\n<\/tr>\n
8088<\/td>\nWeb UI<\/td>\nYARN ResourceManager<\/td>\n\u67e5\u770b\u4f5c\u4e1a\u8fd0\u884c\u72b6\u6001<\/td>\n\u2705 \u53ef\u4ee5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

hadoop\u5b89\u5168\u6a21\u5f0f<\/h3>\n

\u91cd\u65b0\u542f\u52a8\u7684\u65f6\u5019\u4f1a\u8fdb\u5165\u5230\u5b89\u5168\u6a21\u5f0f<\/p>\n

# \u67e5\u770b\u5b89\u5168\u6a21\u5f0f\u72b6\u6001<\/span>
\nhdfs dfsadmin –<\/span>safemode get
\n#\u5f3a\u5236\u9000\u51fa\u5b89\u5168\u6a21\u5f0f<\/span>
\nhdfs dfsadmin –<\/span>safemode leave
\n# \u8f93\u51fa\u793a\u4f8b：<\/span>
\n# Safe mode is ON<\/span>
\n# \u6216<\/span>
\n# Safe mode is OFF<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb719\u6b21\uff0c\u70b9\u8d5e14\u6b21\uff0c\u6536\u85cf28\u6b21\u3002\u6458\u8981 \u672c\u6587\u89e3\u51b3\u4e24\u4e2a\u5e38\u89c1\u95ee\u9898\uff1a1) Windows\u811a\u672c\u5728Linux\u7cfb\u7edf\u8fd0\u884c\u65f6\u56e0\u6362\u884c\u7b26\u5dee\u5f02\u5bfc\u81f4\u7684\u62a5\u9519\uff0c\u53ef\u901a\u8fc7dos2unix\u547d\u4ee4\u8f6c\u6362\u683c\u5f0f\uff1b2) CentOS\u591a\u7248\u672cJava\u7ba1\u7406\u65b9\u6848\uff0c\u63d0\u4f9b\u81ea\u52a8\u5207\u6362\u811a\u672c\u5e76\u901a\u8fc7alternatives\u5b9e\u73b0\u7248\u672c\u540c\u6b65\u3002\u540c\u65f6\u4ecb\u7ecdHadoop 3.3.6\u7684\u4e8c\u8fdb\u5236\u5305\u5b89\u88c5\u6b65\u9aa4\uff0c\u5305\u62ec\u73af\u5883\u53d8\u91cf\u914d\u7f6e\u548c\u7248\u672c\u9a8c\u8bc1\uff0c\u5e76\u89e3\u6790Hadoop\u6838\u5fc3\u7ec4\u4ef6\uff08HDFS\/YARN\/MapReduce\uff09\u53ca\u5176\u5206\u5e03\u5f0f\u5904\u7406\u539f\u7406\uff0c\u6700\u540e\u5217\u4e3e\u5178\u578b\u5e94\u7528\u573a\u666f\u5982\u65e5\u5fd7\u5206\u6790\u3001\u6570\u636e\u4ed3\u5e93\u7b49\uff0c\u5f3a\u8c03\u5176\u9ad8\u6269\u5c55\u6027\u548c\u5bb9\u9519\u6027\u4f18\u52bf\u3002 \uff08\u5b57\u6570\uff1a150\uff09<\/p>\n","protected":false},"author":2,"featured_media":46779,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[779,664,43],"topic":[],"class_list":["post-46788","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-hadoop","tag-664","tag-43"],"yoast_head":"\nhadoop\uff08\u670d\u52a1\u5668\u4f2a\u5206\u5e03\u5f0f\u642d\u5efa\uff09 - 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