{"id":20278,"date":"2013-05-10T12:52:35","date_gmt":"2013-05-10T07:22:35","guid":{"rendered":"http:\/\/vskills.in\/certification\/tutorial\/?p=20278"},"modified":"2024-04-12T14:16:38","modified_gmt":"2024-04-12T08:46:38","slug":"keyspace","status":"publish","type":"page","link":"https:\/\/www.vskills.in\/certification\/tutorial\/keyspace\/","title":{"rendered":"Keyspace"},"content":{"rendered":"<p><a class=\"vsc\" href=\"http:\/\/www.vskills.in\/certification\/Certified-Cassandra-Professional\"><span class=\"vsc-cn\" style=\"text-align: center;\"><span style=\"color: red;\">Certify and Increase Opportunity.<\/span><br \/>\n<span style=\"color: green;\">Be <\/span><br \/>\nGovt. Certified Apache Cassandra Professional<br \/>\n<\/span><\/a><\/p>\n<h1>Keyspaces<\/h1>\n<p>In Cassandra, the <em>keyspace<\/em> is the container for your application data, similar to a schema in a relational database. Keyspaces are used to group column families together. Typically, a cluster has one keyspace per application.<\/p>\n<p>Replication is controlled on a per-keyspace basis, so data that has different replication requirements should reside in different keyspaces. Keyspaces are not designed to be used as a significant map layer within the data model, only as a way to control data replication for a set of column families.<\/p>\n<div id=\"defining-keyspaces\">\n<h2>Defining Keyspaces<\/h2>\n<p>Data Definition Language (DDL) commands for defining and altering keyspaces are provided in the various client interfaces, such as Cassandra CLI and CQL. For example, to define a keyspace in CQL:<\/p>\n<div>\n<div>\n<pre>  CREATE KEYSPACE keyspace_name WITH\nstrategy_class = 'SimpleStrategy'\nAND strategy_options:replication_factor='2';<\/pre>\n<\/div>\n<\/div>\n<p>Or in Cassandra CLI:<\/p>\n<div>\n<div>\n<pre>CREATE KEYSPACE keyspace_name WITH\nplacement_strategy = 'SimpleStrategy'\nAND strategy_options = {replication_factor:2};<\/pre>\n<div class=\"apply\">\n<h3>Apply for Apache Cassandra Certification Now!!<\/h3>\n<p><a href=\"http:\/\/www.vskills.in\/certification\/Certified-Cassandra-Professional\">http:\/\/www.vskills.in\/certification\/Certified-Apache-Cassandra-Professional<\/a><\/p>\n<h5>Go to Tutorial- <a href=\"https:\/\/www.vskills.in\/certification\/tutorial\/apache-cassandra-professional\/\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Certified Apache Cassandra Professional Tutorial<\/strong><\/a><\/h5>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Certify and Increase Opportunity. Be Govt. Certified Apache Cassandra Professional Keyspaces In Cassandra, the keyspace is the container for your application data, similar to a schema in a relational database. Keyspaces are used to group column families together. Typically, a cluster has one keyspace per application. Replication is controlled on a per-keyspace basis, so data&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[63],"tags":[],"class_list":["post-20278","page","type-page","status-publish","hentry","category-apache-cassandra"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Keyspace - Tutorial<\/title>\n<meta name=\"description\" content=\"Keyspace Vskills Government Certification in Apache Cassandra is very popular in India amongst developers working in the IT Bid data industry.\" \/>\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.vskills.in\/certification\/tutorial\/keyspace\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Keyspace - 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