{"id":59,"date":"2010-12-01T10:20:01","date_gmt":"2010-12-01T17:20:01","guid":{"rendered":"https:\/\/www.joshualyman.com\/?p=59"},"modified":"2013-01-16T23:22:05","modified_gmt":"2013-01-17T06:22:05","slug":"sla-uptime-guarantees-in-minutes-and-hours","status":"publish","type":"post","link":"https:\/\/www.joshualyman.com\/2010\/12\/sla-uptime-guarantees-in-minutes-and-hours\/","title":{"rendered":"SLA Uptime Guarantees in Minutes and Hours"},"content":{"rendered":"<p>I was curious about how many 9s in typical service level agreements translates into how much actual time is allowed by each level of guarantee. A quick Google didn&#8217;t yield any quick references, so I turned to Excel and am including it here for future reference. For example, if a service provider offers three 9s, or <strong>99<\/strong>.<strong>9<\/strong>% uptime SLA guarantee, how much does that actually allow in terms of time unavailability? Calculated for a regular 365-day year (leap years get you a couple extra seconds), here are the results:<\/p>\n<table class=\"fancy-table\">\n<thead>\n<tr>\n<th># of 9s<\/th>\n<th>SLA Guarantee<\/th>\n<th>Minutes of Downtime<\/th>\n<th>Hours of Downtime<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>2<\/td>\n<td>99%<\/td>\n<td>5256<\/td>\n<td>87.6<\/td>\n<\/tr>\n<tr class=\"zebra\">\n<td>3<\/td>\n<td>99.9%<\/td>\n<td>525.6<\/td>\n<td>8.76<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>99.99%<\/td>\n<td>52.56<\/td>\n<td>0.876<\/td>\n<\/tr>\n<tr class=\"zebra\">\n<td>5<\/td>\n<td>99.999%<\/td>\n<td>5.256<\/td>\n<td>0.0876<\/td>\n<\/tr>\n<tr>\n<td>6<\/td>\n<td>99.9999%<\/td>\n<td>0.5256<\/td>\n<td>0.00876<\/td>\n<\/tr>\n<tr class=\"zebra\">\n<td>7<\/td>\n<td>99.99999%<\/td>\n<td>0.05256<\/td>\n<td>0.000876<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>So essentially what we&#8217;re looking at is that with a 99% guarantee, the provider is allowed a little over 3.5 days of downtime per year, a 99.99% SLA is allowed a little under 1 hour, and seven 9s (99.99999%) guarantees you just 3 seconds of downtime per year. Interesting from a customer perspective, and even more interesting from a provider&#8217;s perspective.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>How many minutes of failure does a 99.999% uptime SLA grant? I made a quick table for my own reference to find out various levels, in minutes and hours.<\/p>\n<div class=\"more-link-wrapper\"><a class=\"more-link\" href=\"https:\/\/www.joshualyman.com\/2010\/12\/sla-uptime-guarantees-in-minutes-and-hours\/\">Continue reading<span class=\"screen-reader-text\">SLA Uptime Guarantees in Minutes and Hours<\/span><\/a><\/div>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[1],"tags":[32,31,22,30,33,29],"jetpack_publicize_connections":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>SLA Uptime Guarantees in Minutes and Hours - Joshua Lyman.com<\/title>\n<meta name=\"description\" content=\"How many minutes of failure does a 99.999% uptime SLA grant? I made a quick table for my own reference to find out various levels.\" \/>\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.joshualyman.com\/2010\/12\/sla-uptime-guarantees-in-minutes-and-hours\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"SLA Uptime Guarantees in Minutes and Hours - Joshua Lyman.com\" \/>\n<meta name=\"twitter:description\" content=\"How many minutes of failure does a 99.999% uptime SLA grant? I made a quick table for my own reference to find out various levels.\" \/>\n<meta name=\"twitter:creator\" content=\"@jlyman\" \/>\n<meta name=\"twitter:site\" content=\"@jlyman\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Joshua\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.joshualyman.com\/2010\/12\/sla-uptime-guarantees-in-minutes-and-hours\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.joshualyman.com\/2010\/12\/sla-uptime-guarantees-in-minutes-and-hours\/\"},\"author\":{\"name\":\"Joshua\",\"@id\":\"https:\/\/www.joshualyman.com\/#\/schema\/person\/4679b2b5b142a2c904bb46f97a04bd9e\"},\"headline\":\"SLA Uptime Guarantees in Minutes and Hours\",\"datePublished\":\"2010-12-01T17:20:01+00:00\",\"dateModified\":\"2013-01-17T06:22:05+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.joshualyman.com\/2010\/12\/sla-uptime-guarantees-in-minutes-and-hours\/\"},\"wordCount\":160,\"commentCount\":3,\"publisher\":{\"@id\":\"https:\/\/www.joshualyman.com\/#\/schema\/person\/4679b2b5b142a2c904bb46f97a04bd9e\"},\"keywords\":[\"business\",\"guarantees\",\"linkedin\",\"saas\",\"services\",\"sla\"],\"articleSection\":[\"General\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.joshualyman.com\/2010\/12\/sla-uptime-guarantees-in-minutes-and-hours\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.joshualyman.com\/2010\/12\/sla-uptime-guarantees-in-minutes-and-hours\/\",\"url\":\"https:\/\/www.joshualyman.com\/2010\/12\/sla-uptime-guarantees-in-minutes-and-hours\/\",\"name\":\"SLA Uptime Guarantees in Minutes and Hours - Joshua Lyman.com\",\"isPartOf\":{\"@id\":\"https:\/\/www.joshualyman.com\/#website\"},\"datePublished\":\"2010-12-01T17:20:01+00:00\",\"dateModified\":\"2013-01-17T06:22:05+00:00\",\"description\":\"How many minutes of failure does a 99.999% uptime SLA grant? 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