{"id":18804,"date":"2018-06-26T04:01:25","date_gmt":"2018-06-26T04:01:25","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=18804"},"modified":"2021-04-05T13:45:10","modified_gmt":"2021-04-05T08:15:10","slug":"cassandra-terminologies","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/cassandra-terminologies\/","title":{"rendered":"Mostly Used Cassandra Terminologies | Cassandra Glossary"},"content":{"rendered":"<div class='__iawmlf-post-loop-links' style='display:none;' data-iawmlf-post-links='[{&quot;id&quot;:1914,&quot;href&quot;:&quot;http:\\\/\\\/cassandra.apache.org&quot;,&quot;archived_href&quot;:&quot;http:\\\/\\\/web-wp.archive.org\\\/web\\\/20210725052557\\\/http:\\\/\\\/cassandra.apache.org\\\/&quot;,&quot;redirect_href&quot;:&quot;&quot;,&quot;checks&quot;:[{&quot;date&quot;:&quot;2025-12-10 08:13:30&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2025-12-13 21:02:59&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2025-12-16 22:40:09&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2025-12-21 09:37:11&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2025-12-26 12:16:50&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2025-12-29 18:03:35&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-01-03 15:18:30&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-01-07 19:10:53&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-01-11 05:40:10&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-01-14 16:16:42&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-01-17 20:58:21&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-01-22 13:32:11&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-01-25 13:38:32&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-01-29 13:35:59&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-02-01 23:23:53&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-02-05 07:02:58&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-02-08 15:02:49&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-02-12 11:23:22&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-02-17 09:37:29&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-02-22 06:36:03&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-02-25 14:12:52&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-02-28 22:39:30&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-03-04 13:09:40&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-03-09 01:26:10&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-03-12 22:16:19&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-03-17 10:58:32&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-03-21 03:00:05&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-03-25 03:59:29&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-03-29 05:19:54&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-04-03 03:15:28&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-04-08 01:52:27&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-04-11 04:13:23&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-04-15 03:31:18&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-04-18 09:11:57&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-04-21 12:26:09&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-04-25 00:02:08&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-04-28 09:41:34&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-05-03 14:39:42&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-05-12 05:46:00&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-05-15 07:21:42&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-05-18 15:30:40&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-05-21 18:51:09&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-05-25 07:17:54&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-05-28 14:01:44&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-05-31 15:35:15&quot;,&quot;http_code&quot;:206},{&quot;date&quot;:&quot;2026-06-04 05:55:00&quot;,&quot;http_code&quot;:206}],&quot;broken&quot;:false,&quot;last_checked&quot;:{&quot;date&quot;:&quot;2026-06-04 05:55:00&quot;,&quot;http_code&quot;:206},&quot;process&quot;:&quot;done&quot;}]'><\/div>\n<h2>1. Objective &#8211; Cassandra Terminologies<\/h2>\n<p><span style=\"font-weight: 400\">In this <a href=\"https:\/\/data-flair.training\/blogs\/apache-cassandra-tutorial\/\"><strong>Cassandra tutorial<\/strong><\/a>, we will go through all the important Cassandra Terminologies. These Terminologies in Cassandra are Cassandra Cluster, Cassandra Keyspace, Cassandra Data model, Cassandra Column Family, SStable and many more.<\/span><\/p>\n<p>So, let&#8217;s start Cassandra Terminologies tutorial.<\/p>\n<div id=\"attachment_18812\" style=\"width: 1210px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/06\/Cassandra-Terminologies-01.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-18812\" class=\"wp-image-18812 size-full\" src=\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/06\/Cassandra-Terminologies-01.jpg\" alt=\"Cassandra Terminologies\" width=\"1200\" height=\"628\" srcset=\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/06\/Cassandra-Terminologies-01.jpg 1200w, https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/06\/Cassandra-Terminologies-01-150x79.jpg 150w, https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/06\/Cassandra-Terminologies-01-300x157.jpg 300w, https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/06\/Cassandra-Terminologies-01-768x402.jpg 768w, https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/06\/Cassandra-Terminologies-01-1024x536.jpg 1024w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/a><p id=\"caption-attachment-18812\" class=\"wp-caption-text\">Mostly Used Cassandra Terminologies | Cassandra Glossary<\/p><\/div>\n<h2>2. Cassandra Terminologies<\/h2>\n<p>Below are some mostly used Cassandra Terminologies. Let&#8217;s discuss them one by one:<\/p>\n<p><strong>i. Anti-Entropy <\/strong><br \/>\n<span style=\"font-weight: 400\">The mechanism that ensures that every node contains update data.<\/span><\/p>\n<p><strong>ii. Bigtable<\/strong><br \/>\n<span style=\"font-weight: 400\">It is one of a base for the creation of Cassandra. It was created at Google in 2006 as a high-performance database system.<\/span><\/p>\n<p><strong>iii. Bloom Filter<\/strong><br \/>\n<span style=\"font-weight: 400\">It is an algorithm that determines if an element is a member of a particular set.<\/span><\/p>\n<p><strong>iv. Cassandra<\/strong><br \/>\n<span style=\"font-weight: 400\">Open-source, distributed database management system that handles a big set of data.<\/span><\/p>\n<p><strong>v. Cluster<\/strong><br \/>\n<span style=\"font-weight: 400\"><a href=\"https:\/\/data-flair.training\/blogs\/cassandra-cluster\/\"><strong>Cassandra Cluster<\/strong><\/a> is a collection of many nodes. Many clusters together form a database.<\/span><\/p>\n<p><strong>vi. Column<\/strong><br \/>\n<span style=\"font-weight: 400\">It is the basic or the innermost unit in the database. It contains the main data or information.<\/span><\/p>\n<p><strong>vii. Column Families<\/strong><br \/>\n<span style=\"font-weight: 400\">It is a storage unit in keyspace. We can consider it as a table. It contains rows and columns, that in turn, contains the data.<\/span><\/p>\n<p><strong>viii. Commit Log<\/strong><br \/>\n<span style=\"font-weight: 400\">It is basically a median to enter the data in Memtable an SSTable. Before going to the Memtable and SSTable, the data is stored in the commit log. This ensures that at the time of failure, the data is not lost.<\/span><\/p>\n<p><strong>ix. Compaction<\/strong><br \/>\n<span style=\"font-weight: 400\">It is a process that basically compresses the storage. It basically merges large files and frees up space.<\/span><\/p>\n<p><strong>x. Consistency Level<\/strong><br \/>\n<span style=\"font-weight: 400\">This allows the user to set the number of replicas in a cluster. In these replicas, the data is copied and it increases the redundancies.<\/span><br \/>\n<strong><a href=\"https:\/\/data-flair.training\/blogs\/cassandra-features\/\">Let&#8217;s revise Cassandra Features<\/a><\/strong><\/p>\n<p><strong>xi. Dynamo<\/strong><br \/>\n<span style=\"font-weight: 400\">It is the other base of Cassandra. This along with principles of Bigtable led to the creation of Cassandra.<\/span><\/p>\n<p><strong>xii. Failure Detection<\/strong><br \/>\n<span style=\"font-weight: 400\">It is the process of determining the nodes that have experienced failure in a cluster.<\/span><\/p>\n<p><strong>xiii. Fault-Tolerant<\/strong><br \/>\n<span style=\"font-weight: 400\">It is the capacity of the database system to handle faults.<\/span><\/p>\n<p><strong>xiv. Keyspace<\/strong><br \/>\n<span style=\"font-weight: 400\">It is a storage unit in a database. Basically, it is the outermost container in a node. It contains many column families.<\/span><\/p>\n<p><strong>xv. Memtable<\/strong><br \/>\n<span style=\"font-weight: 400\">It is a storage table representation. The data flow here after going through the committable. After this, the data\u00a0flush\u00a0to disk as an SSTable.<\/span><\/p>\n<p><strong>xvi. Node<\/strong><br \/>\n<span style=\"font-weight: 400\">It basically represents a system. They contain many column families that contain data.<\/span><br \/>\n<strong><a href=\"https:\/\/data-flair.training\/blogs\/cassandra-applications\/\">Learn Cassandra Applications | Why Cassandra Is So Popular?<\/a><\/strong><\/p>\n<p><strong>xvii. NoSQL<\/strong><br \/>\n<span style=\"font-weight: 400\">Cassandra<strong>\u00a0<a href=\"https:\/\/data-flair.training\/blogs\/cassandra-vs-rdbms\/\">NoSQL<\/a><\/strong> basically determines the collection of non-sequential data. In other words, it is a non-relational data.<\/span><\/p>\n<p><strong>xviii. Primary key<\/strong><br \/>\n<span style=\"font-weight: 400\">It is a row that basically determines the main row. <\/span><\/p>\n<p><strong>xix. Replication<\/strong><br \/>\n<span style=\"font-weight: 400\">It is a process in which the data is copied from one node to another. This process ensures redundancies.<\/span><\/p>\n<p><strong>xx. Replication Factor<\/strong><br \/>\n<span style=\"font-weight: 400\">It determines the number of replicas that are created in a cluster of a given data.<\/span><\/p>\n<p><strong>xxi. Replication Strategy<\/strong><br \/>\n<span style=\"font-weight: 400\">Basically, the strategy that used to carry out replication in the cluster.<\/span><\/p>\n<p><strong>xxii. Row<\/strong><br \/>\n<span style=\"font-weight: 400\">It is a storage unit. It is a part of column family and contains many columns.<\/span><\/p>\n<p><strong>xxiii. Seed Node<\/strong><br \/>\n<span style=\"font-weight: 400\">It is a kind of a node which is basically used by newly added nodes to get up and running.<\/span><\/p>\n<p><strong>xxiv. SSTable<\/strong><br \/>\n<span style=\"font-weight: 400\">A Sort string table. It allows high performance and can be compacted.<\/span><\/p>\n<p><strong>xxv. SuperColumn<\/strong><br \/>\n<span style=\"font-weight: 400\">It is a column which is basically a map of other columns. In one kind it contains all the columns.<\/span><br \/>\n<strong><a href=\"https:\/\/data-flair.training\/blogs\/cassandra-data-model\/\">Read Cassandra Data Model | How Cassandra Stores Data<\/a><\/strong><\/p>\n<p><strong>xxvi. Thrift<\/strong><br \/>\n<span style=\"font-weight: 400\">An API that uses when user deals with the table as a storage unit.<\/span><\/p>\n<p><strong>xxvii. Timestamp<\/strong><br \/>\n<span style=\"font-weight: 400\">Timestamp are column values that basically is given by the user. It determines the time of a column details.<\/span><\/p>\n<h2>3. Conclusion<\/h2>\n<p><span style=\"font-weight: 400\">Hence, in this article, we came across all the Cassandra terminologies. In the next article, we will go through the <strong><a href=\"https:\/\/data-flair.training\/blogs\/install-cassandra\/\">Cassandra Installation<\/a><\/strong>.<\/span><br \/>\n<strong>See also &#8211;<\/strong><br \/>\n<strong><a href=\"https:\/\/data-flair.training\/blogs\/cql-data-manipulation-commands\/\">CQL Data Manipulation Commands <\/a><\/strong><br \/>\n<a href=\"http:\/\/cassandra.apache.org\/\"><strong>For reference<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>1. Objective &#8211; Cassandra Terminologies In this Cassandra tutorial, we will go through all the important Cassandra Terminologies. These Terminologies in Cassandra are Cassandra Cluster, Cassandra Keyspace, Cassandra Data model, Cassandra Column Family, SStable&#46;&#46;&#46;<\/p>\n","protected":false},"author":7,"featured_media":18812,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[726,1984,2101,2315,2390,2594,2645,2646,2686,2701,2915,4099,4552,8026,8642,9099,9124,9962,11542,11543,11544,11646,12691,13708,13973,14618,14716,14736],"class_list":["post-18804","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cassandra","tag-anti-entropy","tag-bigtable","tag-bloom-filter","tag-cassandra","tag-cassandra-terminologies","tag-cluster","tag-column","tag-column-families","tag-commit-log","tag-compaction","tag-consistency-level","tag-dynamo","tag-fault-tolerant","tag-keyspace","tag-memtable","tag-node","tag-nosql","tag-primary-key","tag-replication","tag-replication-factor","tag-replication-strategy","tag-row","tag-seed-node","tag-sstable","tag-supercolumn","tag-terminologies-in-cassandra","tag-thrift","tag-timestamp"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Mostly Used Cassandra Terminologies | Cassandra Glossary - DataFlair<\/title>\n<meta name=\"description\" content=\"Cassandra Terminologies. 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