{"id":1456,"date":"2018-08-20T22:18:28","date_gmt":"2018-08-20T22:18:28","guid":{"rendered":"http:\/\/wiki.thomasandsofia.com\/?p=1456"},"modified":"2018-08-23T02:09:17","modified_gmt":"2018-08-23T02:09:17","slug":"csap-understanding-high-availability","status":"publish","type":"post","link":"https:\/\/wiki.thomasandsofia.com\/?p=1456","title":{"rendered":"CSAP &#8211; Understanding High Availability"},"content":{"rendered":"<p><a href=\"http:\/\/wiki.thomasandsofia.com\/2018\/08\/20\/aws-certified-solutions-architect-professional-overview\/\">Main Menu<\/a><br><a href=\"http:\/\/wiki.thomasandsofia.com\/2018\/08\/20\/csap-high-availability-business-continuity\/\">Section Menu<\/a><\/p>\n<p><a href=\"https:\/\/www.udemy.com\/aws-certified-solutions-architect-professional\/learn\/v4\/t\/lecture\/8530100?start=0\" target=\"_blank\" rel=\"noopener\">https:\/\/www.udemy.com\/aws-certified-solutions-architect-professional\/learn\/v4\/t\/lecture\/8530100?start=0<\/a><\/p>\n<p><strong>Everything fails, all the time<\/strong><\/p>\n<h1>What is High Availability?<\/h1>\n<ul>\n<li>Is a characteristic of the system design which makes resource available even in the case of any component failure in a computer system.<\/li>\n<li>Availability refers to the amount of time the system is in a functioning condition<\/li>\n<li>General Availability: 100% &#8211; Downtime<\/li>\n<\/ul>\n<p><a href=\"https:\/\/uptime.is\/\" target=\"_blank\" rel=\"noopener\">SLA Calculator<\/a><\/p>\n<p><\/p>\n\n\n<table class=\"wp-block-table\"><tbody><tr><td style=\"width: 193px;\">Percent Uptime<br\/><\/td><td style=\"width: 193px;\">Max Downtime \/ Year<br\/><\/td><td style=\"width: 193px;\">Equiv. Downtime \/ Day<br\/><\/td><\/tr><tr><td style=\"width: 193px;\">90%<br\/><\/td><td style=\"width: 193px;\">36.5 days<br\/><\/td><td style=\"width: 193px;\">2.4 hours<br\/><\/td><\/tr><tr><td style=\"width: 193px;\">99%<br\/><\/td><td style=\"width: 193px;\">3.65 days<br\/><\/td><td style=\"width: 193px;\">14 minutes<br\/><\/td><\/tr><tr><td style=\"width: 193px;\">99.9<br\/><\/td><td style=\"width: 193px;\">8.76 hours<br\/><\/td><td style=\"width: 193px;\">86 seconds<br\/><\/td><\/tr><tr><td style=\"width: 193px;\">99.95 (EC2 Uptime SLA)<br\/><\/td><td style=\"width: 193px;\">4.38 hours<\/td><td style=\"width: 193px;\">43 seconds<br\/><\/td><\/tr><\/tbody><\/table>\n\n\n<h1>Important Points<\/h1>\n<ul>\n<li>Improving availability leads to cost increases. It&#8217;s important to balance\u00a0 betweeen the cost factor and the availability.<\/li>\n<li>SLA of your organization matters.\u00a0 90% SLA means 2.4 hours of downtime every day.<\/li>\n<li>You can use Pingdom to get reports on your website&#8217;s uptime.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Main MenuSection Menu https:\/\/www.udemy.com\/aws-certified-solutions-architect-professional\/learn\/v4\/t\/lecture\/8530100?start=0 Everything fails, all the time What is High Availability? Is a characteristic of the system design which makes resource available even in the case of any component failure in a computer system. Availability refers to the amount of time the system is in a functioning condition General Availability: 100% &#8211; Downtime ..<\/p>\n<div class=\"clear-fix\"><\/div>\n<p><a href=\"https:\/\/wiki.thomasandsofia.com\/?p=1456\" title=\"read more...\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18,38],"tags":[],"class_list":["post-1456","post","type-post","status-publish","format-standard","hentry","category-amazon-web-services-aws","category-certified-solutions-architect-professional"],"_links":{"self":[{"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=\/wp\/v2\/posts\/1456","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1456"}],"version-history":[{"count":5,"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=\/wp\/v2\/posts\/1456\/revisions"}],"predecessor-version":[{"id":1495,"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=\/wp\/v2\/posts\/1456\/revisions\/1495"}],"wp:attachment":[{"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1456"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1456"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1456"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}