{"id":98384,"date":"2024-05-27T12:53:18","date_gmt":"2024-05-27T10:53:18","guid":{"rendered":"https:\/\/firstcolo.blackpeppers.de\/glossary\/redundancy\/"},"modified":"2026-03-15T01:37:51","modified_gmt":"2026-03-15T00:37:51","slug":"redundancy","status":"publish","type":"glossary","link":"https:\/\/firstcolo.blackpeppers.de\/en\/glossary\/redundancy\/","title":{"rendered":"Redundancy"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"98384\" class=\"elementor elementor-98384 elementor-48779\" data-elementor-post-type=\"glossary\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1bd784f3 e-flex e-con-boxed e-con e-parent\" data-id=\"1bd784f3\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-47eec71a e-con-full e-flex e-con e-child\" data-id=\"47eec71a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-69d23709 e-con-full e-flex e-con e-child\" data-id=\"69d23709\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-6d5f1474 e-con-full e-flex e-con e-child\" data-id=\"6d5f1474\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5e8b4eb5 elementor-widget elementor-widget-heading\" data-id=\"5e8b4eb5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">What does redundancy mean?<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-44bf94f1 elementor-widget elementor-widget-text-editor\" data-id=\"44bf94f1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The principle of redundancy in information technology (IT) serves to increase the reliability and availability of systems. Fundamentally, redundancy can be intentional or unintentional. As a security concept, it refers to the (intentional) provision of additional resources or components that are designed to ensure the functionality of a system in the event of a failure.  <\/p><p>The opposite of this multiple design is referred to as a <a href=\"https:\/\/firstcolo.blackpeppers.de\/en\/glossary\/single-point-of-failure-spof\/\">Single Point of Failure (SPoF)<\/a>: Here, the failure of a single component (for example, a server) leads to the failure of the entire system, as no backup exists. Unintentional redundancy often occurs when unnecessary data duplicates exist: These occupy storage space and complicate data maintenance, which can subsequently lead to inconsistencies. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4b2c8721 e-flex e-con-boxed e-con e-parent\" data-id=\"4b2c8721\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-55a0651b elementor-widget elementor-widget-heading\" data-id=\"55a0651b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Purpose<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4a859750 elementor-widget elementor-widget-text-editor\" data-id=\"4a859750\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The redundancy principle aims to increase the availability, reliability, and fault tolerance of IT systems. By implementing redundant systems, companies ensure that their services remain available even in the event of hardware or software failures. Redundancy thus contributes to avoiding downtime and ensuring continuous business operations. As such, the redundancy principle should also be part of a <a href=\"https:\/\/firstcolo.blackpeppers.de\/en\/glossary\/business-continuity-plan-bcp\/\">Business Continuity Plan (BCP)<\/a>.   <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4c210ac elementor-widget elementor-widget-heading\" data-id=\"4c210ac\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Types<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-672ef5f3 elementor-widget elementor-widget-heading\" data-id=\"672ef5f3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Data Redundancy<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-40f095f1 elementor-widget elementor-widget-text-editor\" data-id=\"40f095f1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Redundant data are copies or duplicates of data records that are either mirrored or distributed across different locations and servers. This practice serves to increase the availability and security of data. Through various technologies, regular backups, virtualization, or mirroring, it is ensured that no data is lost in the event of hardware failures or other damage. Additionally, redundant data structures enable faster access to information over greater distances and support strategies such as backup and disaster recovery.   <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-795f0f53 elementor-widget elementor-widget-heading\" data-id=\"795f0f53\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Functional Redundancy<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6587262c elementor-widget elementor-widget-text-editor\" data-id=\"6587262c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Functional redundancy means that multiple systems or components fulfill the same function to increase availability. An example is server redundancy: Here, multiple servers are operated in parallel so that if one server fails, the required tasks are taken over by the other servers. Redundant servers are operated in either active or passive mode: In active mode, all servers share the load, while in passive mode, a server is only activated when another fails. This significantly increases fault tolerance and reduces the risk of downtime.   <\/p><p>Network redundancy ensures that by implementing multiple network connections and paths, data transmission is not interrupted even if a network segment fails.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2f32be1 elementor-widget elementor-widget-heading\" data-id=\"2f32be1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Geographic Redundancy and Data Center Redundancy<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6a29ec16 elementor-widget elementor-widget-text-editor\" data-id=\"6a29ec16\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Geographic redundancy involves the distribution of data and services across multiple geographically separated locations. This distribution thus protects against large-scale failures that could be caused by natural disasters, regional power outages, or other serious incidents. Spatial separation minimizes the risk that a single event could affect the entire operation (compare also SPoF\/Single Point of Failure). The principle of geographic redundancy is applied in data centers, among other ways, through distribution across multiple locations, which are often in different countries or even on different continents.   <\/p><p>Within the data center as well, redundancy is critical and refers to the multiple design of technical components and the infrastructure layout. It can include several measures: <\/p><ul class=\"ul1\"><li class=\"li2\"><span class=\"s1\">Redundant power supply: The use of dual power supply systems, UPS systems (uninterruptible power supply), and emergency generators ensures that energy remains available in the event of a primary power source failure.<\/span><\/li><li class=\"li2\"><span class=\"s1\">Cooling: Redundant cooling systems ensure continuous server cooling even if one cooling system fails. Overheating can cause significant hardware damage and interrupt operations. <\/span><\/li><li class=\"li2\"><span class=\"s1\">Network components: Multiple network paths and redundant network devices ensure that data traffic continues to flow unimpeded even if part of the network fails.<\/span><\/li><\/ul><p><br>These measures help ensure that a data center&#8217;s services remain available even when individual components fail. The combination of geographic redundancy and local infrastructure redundancy <a href=\"https:\/\/www.it-daily.net\/it-management\/data-center\/was-zaehlt-bei-einem-sicheren-rechenzentrum-wirklich\">thus increases security in the data center.<\/a> <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-165f0277 e-con-full e-flex e-con e-child\" data-id=\"165f0277\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4c75cee7 elementor-widget elementor-widget-button\" data-id=\"4c75cee7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Homepage<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5c86bbd2 elementor-widget elementor-widget-button\" data-id=\"5c86bbd2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/firstcolo.blackpeppers.de\/en\/knowledge\/glossary\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Glossary<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Redundancy in IT is the multiple presence of components or data to make systems more reliable and available.<\/p>\n","protected":false},"author":43,"featured_media":0,"menu_order":0,"template":"","meta":{"content-type":"","footnotes":""},"glossary-categories":[],"glossary-tags":[],"class_list":["post-98384","glossary","type-glossary","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Redundancy (Definition) | firstcolo Glossary<\/title>\n<meta name=\"description\" content=\"The principle of redundancy improves system functionality. 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