{"id":962,"date":"2011-08-29T17:04:02","date_gmt":"2011-08-29T17:04:02","guid":{"rendered":"https:\/\/www.techopedia.com\/definition\/database-clustering\/"},"modified":"2020-05-13T19:28:35","modified_gmt":"2020-05-13T19:28:35","slug":"database-clustering","status":"publish","type":"definition","link":"https:\/\/www.techopedia.com\/definition\/17\/database-clustering","title":{"rendered":"Database Clustering"},"content":{"rendered":"

What Does Database Clustering Mean?<\/span><\/h2>\n

Database clustering refers to the ability of several servers or instances to connect to a single database. <\/p>\n

An instance is the collection of memory and processes that interacts with a database, which is the set of physical files that actually store data.<\/p>\n

Techopedia Explains Database Clustering<\/span><\/h2>\n

Database clustering offers two major advantages, especially in high-volume database environments:<\/p>\n

Fault Tolerance<\/span><\/h2>\n

Because there is more than one server or instance for users to connect to, clustering offers an alternative, in the event of individual server failure.<\/p>\n

Load Balancing<\/span><\/h2>\n

The clustering feature is usually set up to allow users to be automatically allocated to the server with the least load.<\/p>\n

Database clustering takes different forms, depending on how the data is stored and allocated resources. <\/p>\n

Shared-Nothing Architecture<\/span><\/h2>\n

In this database clustering mode, each node\/server is fully independent, so there is no single point of contention. An example of this would be when a company has multiple data centers for a single website. <\/p>\n

With many servers across the globe, no single server is a “master.” Shared-nothing is also known as “database sharding.”<\/p>\n

Shared-Disk Architecture<\/span><\/h2>\n

All data is stored centrally and then accessed via instances stored on different servers or nodes.<\/p>\n

The distinction between the two types has become blurred recently with the introduction of grid computing or distributed caching. In this setup, data is still centrally managed but controlled by a powerful “virtual server” that is comprised of many servers that work together as one.<\/p>\n","protected":false},"excerpt":{"rendered":"

What Does Database Clustering Mean? Database clustering refers to the ability of several servers or instances to connect to a single database. An instance is the collection of memory and processes that interacts with a database, which is the set of physical files that actually store data. Techopedia Explains Database Clustering Database clustering offers two […]<\/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":[254,227,222,262,228,237],"class_list":["post-962","definition","type-definition","status-publish","format-standard","hentry","definitioncat-data-centers","definitioncat-data-management","definitioncat-database","definitioncat-identity-access-governance","definitioncat-risk-management","definitioncat-servers"],"acf":[],"yoast_head":"\nWhat is Database Clustering? - Definition from Techopedia<\/title>\n<meta name=\"description\" content=\"This definition explains the meaning of Database Clustering and why it matters.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.techopedia.com\/definition\/17\/database-clustering\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Database Clustering\" \/>\n<meta property=\"og:description\" content=\"This definition explains the meaning of Database Clustering and why it matters.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.techopedia.com\/definition\/17\/database-clustering\" \/>\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=\"2020-05-13T19:28:35+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\/17\/database-clustering#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.techopedia.com\/definition\/17\/database-clustering\"},\"author\":{\"name\":\"Margaret Rouse\",\"@id\":\"https:\/\/www.techopedia.com\/#\/schema\/person\/f5dd538e31ee352d105b8af36c4268a5\"},\"headline\":\"Database Clustering\",\"datePublished\":\"2011-08-29T17:04:02+00:00\",\"dateModified\":\"2020-05-13T19:28:35+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.techopedia.com\/definition\/17\/database-clustering\"},\"wordCount\":255,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.techopedia.com\/#organization\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.techopedia.com\/definition\/17\/database-clustering#respond\"]}],\"articleSection\":\"\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.techopedia.com\/definition\/17\/database-clustering\",\"url\":\"https:\/\/www.techopedia.com\/definition\/17\/database-clustering\",\"name\":\"What is Database Clustering? 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