{"id":12915,"date":"2013-01-01T16:16:14","date_gmt":"2013-01-01T16:16:14","guid":{"rendered":"https:\/\/www.techopedia.com\/definition\/hadoop-distributed-file-system\/"},"modified":"2017-01-17T15:27:05","modified_gmt":"2017-01-17T15:27:05","slug":"hadoop-distributed-file-system","status":"publish","type":"definition","link":"https:\/\/www.techopedia.com\/definition\/29129\/hadoop-distributed-file-system-hdfs","title":{"rendered":"Hadoop Distributed File System"},"content":{"rendered":"<h2><span id=\"what_does_hadoop_distributed_file_system_mean\">What Does Hadoop Distributed File System Mean?<\/span><\/h2>\n<p>The Hadoop Distributed File System (HDFS) is a distributed file system that runs on standard or low-end hardware. Developed by Apache Hadoop, HDFS works like a standard distributed file system but provides better data throughput and access through the MapReduce algorithm, high fault tolerance and native support of large data sets.\n<\/p>\n<h2><span id=\"techopedia_explains_hadoop_distributed_file_system\">Techopedia Explains Hadoop Distributed File System<\/span><\/h2>\n<p>The HDFS stores a large amount of data placed across multiple machines, typically in hundreds and thousands of simultaneously connected nodes, and provides data reliability by replicating each data instance as three different copies &#8211; two in one group and one in another. These copies may be replaced in the event of failure.\n<\/p>\n<p>The HDFS architecture consists of clusters, each of which is accessed through a single NameNode software tool installed on a separate machine to monitor and manage the that cluster&#8217;s file system and user access mechanism. The other machines install one instance of DataNode to manage cluster storage.\n<\/p>\n<p>Because HDFS is written in Java, it has native support for Java application programming interfaces (API) for application integration and accessibility. It also may be accessed through standard Web browsers.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What Does Hadoop Distributed File System Mean? The Hadoop Distributed File System (HDFS) is a distributed file system that runs on standard or low-end hardware. Developed by Apache Hadoop, HDFS works like a standard distributed file system but provides better data throughput and access through the MapReduce algorithm, high fault tolerance and native support of [&hellip;]<\/p>\n","protected":false},"author":7813,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"_lmt_disableupdate":"","_lmt_disable":"","om_disable_all_campaigns":false,"footnotes":""},"definitioncat":[227,222,262,228],"class_list":["post-12915","definition","type-definition","status-publish","format-standard","hentry","definitioncat-data-management","definitioncat-database","definitioncat-identity-access-governance","definitioncat-risk-management"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.2 (Yoast SEO v24.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is the Hadoop Distributed File System (HDFS)? - Definition from Techopedia<\/title>\n<meta name=\"description\" content=\"This definition explains the meaning of Hadoop Distributed File System and why it matters.\" \/>\n<meta name=\"robots\" content=\"noindex, follow\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hadoop Distributed File System\" \/>\n<meta property=\"og:description\" content=\"This definition explains the meaning of Hadoop Distributed File System and why it matters.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.techopedia.com\/definition\/29129\/hadoop-distributed-file-system-hdfs\" \/>\n<meta property=\"og:site_name\" content=\"Techopedia\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/techopedia\/\" \/>\n<meta property=\"article:modified_time\" content=\"2017-01-17T15:27:05+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@techopedia\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.techopedia.com\/definition\/29129\/hadoop-distributed-file-system-hdfs#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.techopedia.com\/definition\/29129\/hadoop-distributed-file-system-hdfs\"},\"author\":{\"name\":\"Margaret Rouse\",\"@id\":\"https:\/\/www.techopedia.com\/#\/schema\/person\/f5dd538e31ee352d105b8af36c4268a5\"},\"headline\":\"Hadoop Distributed File System\",\"datePublished\":\"2013-01-01T16:16:14+00:00\",\"dateModified\":\"2017-01-17T15:27:05+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.techopedia.com\/definition\/29129\/hadoop-distributed-file-system-hdfs\"},\"wordCount\":199,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.techopedia.com\/#organization\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.techopedia.com\/definition\/29129\/hadoop-distributed-file-system-hdfs#respond\"]}],\"articleSection\":\"\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.techopedia.com\/definition\/29129\/hadoop-distributed-file-system-hdfs\",\"url\":\"https:\/\/www.techopedia.com\/definition\/29129\/hadoop-distributed-file-system-hdfs\",\"name\":\"What is the Hadoop Distributed File System (HDFS)? 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