{"id":6817,"date":"2020-12-21T04:06:46","date_gmt":"2020-12-21T03:06:46","guid":{"rendered":"https:\/\/myoceane.fr\/?p=6817"},"modified":"2020-12-21T06:48:48","modified_gmt":"2020-12-21T05:48:48","slug":"big-data-hadoop-3-vs-2","status":"publish","type":"post","link":"https:\/\/myoceane.fr\/index.php\/big-data-hadoop-3-vs-2\/","title":{"rendered":"[Big Data] Hadoop 3.x v.s 2.x"},"content":{"rendered":"<div id=\"fb-root\"><\/div>\n<p style=\"text-align: justify;\">\u5728<a href=\"https:\/\/myoceane.fr\/index.php\/hdfs-%E5%AE%89%E8%A3%9D-hdfs\/\">\u4e0a\u4e00\u7bc7<\/a>\u6211\u5011\u63a2\u8a0e\u4e86 Hdfs \u5728 Hadoop 3.1.2 \u7684\u6642\u5019\u8981\u600e\u9ebc\u5b89\u88dd\uff1f\u6700\u8fd1\u7531\u65bc\u7b46\u8005\u9700\u8981\u5c07 Spark 2.4 \u5347\u5230 Spark 3.0 \u4ee5\u4e0a\uff0c\u6240\u4ee5\u9806\u4fbf\u7814\u7a76\u4e26\u4e14\u63a2\u8a0e Hadoop 3.x \u8207 Hadoop 2.x \u7248\u672c\u7684\u5dee\u7570\uff0c\u672c\u7bc7\u4e3b\u8981\u53c3\u8003\u7684\u662f <a href=\"https:\/\/data-flair.training\/blogs\/hadoop-2-x-vs-hadoop-3-x-comparison\/\">Data Flair \u7db2\u7ad9\u4e0a\u9762\u7684\u6bd4\u8f03\u5dee\u7570<\/a>\uff0c\u6211\u5011\u6574\u7406\u4e26\u4e14\u7cbe\u7c21 22 \u9805\u5dee\u7570\u4e2d\u5230\u6700\u91cd\u8981\u7684 7 \u9805\u3002<\/p>\n<h5>Hadoop \u7684\u7bc4\u7587<\/h5>\n<p>\u95dc\u65bc Hadoop \u7684\u4ecb\u7d39\u5728\u7db2\u8def\u4e0a\u771f\u7684\u662f\u4e0d\u52dd\u679a\u8209\uff0c\u9019\u908a\u6211\u5011\u5f15\u7528<a href=\"https:\/\/ithelp.ithome.com.tw\/articles\/10190756\">\u75de\u5ba2\u90a6\u9435\u4eba\u8cfd\u7684\u4ecb\u7d39<\/a>\uff08\u7b46\u8005\u4e5f\u662f\u53d7\u60e0\u826f\u591a\uff09\u4ed6\u5011\u4ecb\u7d39\u7684 Hadoop \u751f\u614b\u7cfb\u7684\u7bc4\u7587\u771f\u7684\u662f\u5f88\u5ee3\u5305\u542b Apache Hadoop, Apache Spark, Apache Hive, Apache HBase, Apache Solr \u7b49\u7b49\u7684\u5c08\u6848\uff0c\u5728 Hadoop \u7684\u5c08\u6848\u88e1\u9762\u5247\u4e3b\u8981\u5305\u542b Hdfs, MapReduce \u8207 Yarn\uff0c\u6211\u5011\u5982\u679c\u5be6\u969b\u5f9e <a href=\"https:\/\/hadoop.apache.org\/releases.htmlhttps:\/\/hadoop.apache.org\/releases.html\">Hadoop \u7684\u5b98\u7db2<\/a>\u4e0a\u9762\u4e0b\u8f09\u53ef\u4ee5\u770b\u5230\u4ed6\u5011\u88e1\u9762\u5176\u5be6\u6709\u66f4\u591a\u5c0f\u7684 project \u4f8b\u5982\u6211\u5011\u4e4b\u524d\u4ecb\u7d39\u7684 <a href=\"https:\/\/myoceane.fr\/index.php\/big-data-%e5%bb%ba%e7%ab%8b-hdfs-%e5%9c%a8-local-%e6%b8%ac%e8%a9%a6%e7%92%b0%e5%a2%83\/\">minicluster<\/a>\u3002<\/p>\n<h5>Hadoop 2.x v.s Hadoop 3.x<\/h5>\n<p>\u4ee5\u4e0b\u6211\u5011\u5217\u51fa\u76f8\u5c0d\u91cd\u8981\u7684\u5dee\u7570\uff1a<\/p>\n<ol>\n<li style=\"text-align: justify;\">Minimum supported version of Java (Java \u6700\u4f4e\u652f\u63f4\u7248\u672c)\uff1a\n<ul>\n<li>Hadoop 2.x \u6700\u4f4e\u652f\u63f4 Java 7\uff0cHadoop 3.x \u6700\u4f4e\u652f\u63f4 Java 8\u3002<\/li>\n<\/ul>\n<\/li>\n<li style=\"text-align: justify;\">Fault Tolerance (\u5bb9\u8a31\u932f\u8aa4\u6a5f\u5236)\uff1a\n<ul>\n<li>Hadoop 2.x \u4e3b\u8981\u662f\u900f\u904e\u6a94\u6848\u8907\u88fd Replication\uff0cHadoop 3.x \u662f\u900f\u904e\u65b0\u7684 Erasure Coding \u7684\u65b9\u5f0f\u3002<\/li>\n<\/ul>\n<\/li>\n<li style=\"text-align: justify;\">Data Balancing\uff1a\n<ul>\n<li>Hadoop 2.x \u4f7f\u7528 Hdfs Balancing\uff0cHadoop 3.x \u4f7f\u7528 Intra-data Node Balancer\u3002<\/li>\n<\/ul>\n<\/li>\n<li>Storage Overhead\uff1a\n<ul>\n<li style=\"text-align: justify;\">\u7531\u65bc Hadoop 2.x \u662f\u4f7f\u7528 Replication \u6240\u4ee5\u5728 Replication \u662f 3x \u7684\u60c5\u6cc1\u4e0b Overhead \u662f 200% \uff0c\u76f8\u53cd\u5730 Hadoop 3.x \u662f\u53ea\u6709 50%\u3002<\/li>\n<\/ul>\n<\/li>\n<li>Default Ports Range\uff1a\n<ul>\n<li style=\"text-align: justify;\">Hadoop 2.x \u4f7f\u7528 Linux \u9810\u8a2d\u7684\u81e8\u6642\u7aef\u53e3 (32678-61000) \u6240\u4ee5\u6709\u6642\u5019\u5728\u521d\u59cb\u5316\u7684\u6642\u5019\u6703\u6709\u7aef\u53e3\u885d\u7a81\uff0cHadoop 3.x \u4f7f\u7528 Linux \u9810\u8a2d\u7aef\u53e3\u4ee5\u5916\u7684\u5340\u6bb5\u3002<\/li>\n<\/ul>\n<\/li>\n<li>Compatible File System\uff1a\n<ul>\n<li>Hadoop 2.x\uff1a\u5305\u542b HDFS, \u9060\u7aef\u7684 FTP, Amazon S3, Windows Azure Storage Blob (WASB)<\/li>\n<li>Hadoop 3.x\uff1a\u9664\u4ee5\u4e0a\u4e4b\u5916\u5305\u542b Azure Datalake Storage<\/li>\n<\/ul>\n<\/li>\n<li>Scalability\uff1a\n<ul>\n<li>Hadoop 2.x Datanode \u53ea\u80fd\u5920\u6700\u591a 10000 \u53f0\uff0cHadoop 3.x \u4ee5\u4e0a Datanode \u6700\u591a\u53ef\u4ee5\u8d85\u904e 10000 \u53f0\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>\u6574\u7406\u5b8c\u7684\u7d50\u679c\uff0c\u611f\u89ba\u5dee\u7570\u4e26\u4e0d\u5927\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u4e0a\u4e00\u7bc7\u6211\u5011\u63a2\u8a0e\u4e86 Hdfs \u5728 Hadoop 3.1.2 \u7684\u6642\u5019\u8981\u600e\u9ebc\u5b89\u88dd\uff1f\u6700\u8fd1\u7531\u65bc\u7b46\u8005\u9700\u8981\u5c07 Spark 2.4 \u5347\u5230 Spark 3.0 \u4ee5\u4e0a\uff0c\u6240\u4ee5\u9806\u4fbf\u7814\u7a76\u4e26\u4e14\u63a2\u8a0e Hadoop 3.x \u8207 Hadoop 2.x \u7248\u672c\u7684\u5dee\u7570\uff0c\u672c\u7bc7\u4e3b\u8981\u53c3\u8003\u7684\u662f Data Flair \u7db2\u7ad9\u4e0a\u9762\u7684\u6bd4\u8f03\u5dee\u7570\uff0c\u6211\u5011\u6574\u7406\u4e26\u4e14\u7cbe\u7c21 22 \u9805\u5dee\u7570\u4e2d\u5230\u6700\u91cd\u8981\u7684 7 \u9805\u3002<\/p>\n","protected":false},"author":1,"featured_media":1321,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,14],"tags":[1056,1058,1055,266],"class_list":["post-6817","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bigdata-ml","category-it-technology","tag-hadoop-2","tag-hadoop-3","tag-hadoop-ecosystem","tag-hdfs"],"yoast_head":"<!-- This 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