{"id":4303,"date":"2011-08-18T10:39:00","date_gmt":"2011-08-18T17:39:00","guid":{"rendered":"https:\/\/blogs.technet.microsoft.com\/dataplatforminsider\/2011\/08\/18\/alwayson-new-in-sql-server-code-name-denali-ctp3\/"},"modified":"2024-01-22T22:49:59","modified_gmt":"2024-01-23T06:49:59","slug":"alwayson-new-in-sql-server-code-name-denali-ctp3","status":"publish","type":"post","link":"https:\/\/www.microsoft.com\/en-us\/sql-server\/blog\/2011\/08\/18\/alwayson-new-in-sql-server-code-name-denali-ctp3\/","title":{"rendered":"AlwaysOn &#8211; New in SQL Server Code Name &#8220;Denali&#8221; CTP3"},"content":{"rendered":"<p><span style=\"font-size: small\"><b><span style=\"text-decoration: underline\"><span lang=\"EN\"><span style=\"font-family: Segoe UI\">What is SQL Server AlwaysOn?<\/span><\/span><\/span><\/b><\/span><\/p>\n<div style=\"line-height: normal;list-style-type: disc;margin: 0in 0in 10pt\"><span lang=\"EN\" style=\"font-size: small\"><span style=\"font-family: Segoe UI\">SQL Server AlwaysOn is the new high availability and disaster recovery solution for the next release of SQL Server. Using AlwaysOn businesses can achieve increased application availability for their mission critical applications and get higher returns on their high availability investments through better utilization of hardware resources. AlwaysOn also increases productivity and lowers TCO by greatly simplifying high availability deployment and management.<\/p>\n<p><\/span><\/span><span style=\"font-size: small\"><b><span style=\"text-decoration: underline\"><span lang=\"EN\"><span style=\"font-family: Segoe UI\">Database Availability and Instance Availability using AlwaysOn<\/span><\/span><\/span><\/b><\/span><\/div>\n<div style=\"line-height: 13.5pt;list-style-type: disc;margin: 0in 0in 10pt;background: white\"><span lang=\"EN\" style=\"font-size: small\"><span style=\"font-family: Segoe UI\">The key aspect of AlwaysOn is that it provides you with the flexibility to configure high availability and disaster recovery for your application databases andor for the entire instance<br \/>\n<\/span><\/span><\/div>\n<ul>\n<li>\n<div class=\"MsoNormal\" style=\"line-height: 13.5pt;list-style-type: disc;text-indent: -0.25in;margin: 0in 0in 0pt 43.5pt;background: white\"><span style=\"font-size: small\"><span style=\"font-family: Calibri\"><b><span lang=\"EN\">AlwaysOn Availability Group<\/span><\/b><span lang=\"EN\">is the new feature in SQL Server AlwaysOn that provides <b>availability for<\/b> <b>application database(s)<\/b>. Availability Group provides a rich set of options that gives the flexibility to configure a high availability environment that can meet the SLA&#8217;s of the various applications in your environment. The feature also comes with a set of options that allows utilization of your secondaries. Apart from these options there is complete integration with management studio and Powershell that makes deployment and management of Availability Group extremely simple.<\/p>\n<p><\/span><\/span><\/span><\/div>\n<\/li>\n<li>\n<div class=\"MsoNormal\" style=\"line-height: 13.5pt;list-style-type: disc;text-indent: -0.25in;margin: 0in 0in 0pt 43.5pt;background: white\"><span style=\"font-size: small\"><span style=\"font-size: small\"><span style=\"font-family: Calibri\"><b><span lang=\"EN\">AlwaysOn Failover Cluster Instance <\/span><\/b><span lang=\"EN\">enhances the existing SQL Server Failover Clustering feature and provides <b>availability for the entire instance.<\/b> AlwaysOn provides a richer set of capabilities that will increase instance availability and addresses a number of existing pain points.<\/span><\/span><span lang=\"EN\"><span style=\"font-family: Segoe UI\"><br \/>\n<\/span><\/span><\/span><\/span><\/p>\n<div><\/div>\n<p>&nbsp;<\/p>\n<\/div>\n<\/li>\n<\/ul>\n<p><span style=\"font-size: small\"><b><span style=\"text-decoration: underline\"><span lang=\"EN\"><span style=\"font-family: Segoe UI\">Key Features of AlwaysOn Availability Group<\/p>\n<p><\/span><\/span><\/span><\/b><\/span><\/p>\n<ul>\n<li><span style=\"font-size: small\">Multi database failover<\/span><\/li>\n<li><span style=\"font-size: small\">Multiple secondaries (A secondary is conceptually similar to a Mirror in Database Mirroring)<\/span><\/li>\n<\/ul>\n<ul>\n<li><span style=\"font-size: small\">Max of 4 secondaries<\/span><\/li>\n<\/ul>\n<ul>\n<li><span style=\"font-size: small\">Synchronous and asynchronous data movement<\/span><\/li>\n<\/ul>\n<ul>\n<li><span style=\"font-size: small\">Support for 2 synchronous secondaries for additional data protection<\/span><\/li>\n<\/ul>\n<ul>\n<li><span style=\"font-size: small\">Built in compression and encryption of transport<\/span><\/li>\n<li><span style=\"font-size: small\">Automatic, Manual and Forced Failover<\/span><\/li>\n<li><span style=\"font-size: small\">Flexible failover policy<\/span><\/li>\n<li><span style=\"font-size: small\">Automatic Page Repair<\/span><\/li>\n<li><span style=\"font-size: small\">Active Secondary<\/span><\/li>\n<\/ul>\n<ul>\n<li><span style=\"font-size: small\">Readable secondary<\/span><\/li>\n<li><span style=\"font-size: small\">Secondary backup<\/span><\/li>\n<\/ul>\n<ul>\n<li><span style=\"font-size: small\">Automatic application redirection using virtual name<\/span><\/li>\n<li><span style=\"font-size: small\">Configuration Wizard for simplified deployment<\/span><\/li>\n<li><span style=\"font-size: small\">AlwaysOn Dashboard<\/span><\/li>\n<li><span style=\"font-size: small\">System Center Integration<\/span><\/li>\n<li><span style=\"font-size: small\">Automation using Powershell<\/span><\/li>\n<li><span style=\"font-size: small\">Rich diagnostic infrastructure<\/span><\/li>\n<\/ul>\n<ul>\n<li><span style=\"font-size: small\">DMV, Perfmon Counter, Xevents etc\u2026<\/span><\/li>\n<\/ul>\n<p><span style=\"font-size: small\"><span lang=\"EN\"><span style=\"font-family: Segoe UI\"><br \/>\n<\/span><\/span><b><span style=\"text-decoration: underline\"><span lang=\"EN\"><span style=\"font-family: Segoe UI\">Key Features of AlwaysOn Failover Cluster Instance <\/span><\/span><\/span><\/b><\/span><\/p>\n<ul>\n<li>\n<div class=\"MsoNormal\" style=\"line-height: normal;list-style-type: disc;margin: 0in 0in 0pt;background: white\"><span style=\"font-size: small\"><span lang=\"EN\"><span style=\"font-family: Segoe UI\">Native support\u00a0 for multi-site clustering across subnets enable DR using failover cluster instances<\/span><\/span><\/span><\/div>\n<\/li>\n<li>\n<div class=\"MsoNormal\" style=\"line-height: normal;list-style-type: disc;margin: 0in 0in 0pt;background: white\"><span style=\"font-size: small\"><span lang=\"EN\"><span style=\"font-family: Segoe UI\">Flexible Failover Policy<\/span><\/span><\/span><\/div>\n<\/li>\n<\/ul>\n<ul>\n<li>\n<div class=\"MsoNormal\" style=\"line-height: normal;list-style-type: disc;margin: 0in 0in 0pt;background: white\"><span style=\"font-size: small\"><span style=\"font-family: Segoe UI\"><span lang=\"EN\">Providing new failure detection mechanism using <\/span><a style=\"cursor: auto\" href=\"http:\/\/msdn.microsoft.com\/en-us\/library\/ff878233(SQL.110).aspx\"><span lang=\"EN\"><span style=\"color: #333333\">sp_server_diagnostics<\/span><\/span><\/a><\/span><\/span><\/div>\n<\/li>\n<li>\n<div class=\"MsoNormal\" style=\"line-height: normal;list-style-type: disc;margin: 0in 0in 0pt;background: white\"><span style=\"font-size: small\"><span lang=\"EN\"><span style=\"font-family: Segoe UI\">Customer Configurable failure condition level for more granular control on failover<\/span><\/span><\/span><\/div>\n<\/li>\n<li>\n<div class=\"MsoNormal\" style=\"line-height: normal;list-style-type: disc;margin: 0in 0in 0pt;background: white\"><span style=\"font-size: small\"><span lang=\"EN\"><span style=\"font-family: Segoe UI\">Better diagnostics<\/span><\/span><\/span><\/div>\n<\/li>\n<\/ul>\n<ul>\n<li>\n<div class=\"MsoNormal\" style=\"line-height: normal;list-style-type: disc;margin: 0in 0in 0pt;background: white\"><span style=\"font-size: small\"><span lang=\"EN\"><span style=\"font-family: Segoe UI\">SMB support\u00a0 enabling consolidation of more than 26 instances<\/span><\/span><\/span><\/div>\n<\/li>\n<li>\n<div class=\"MsoNormal\" style=\"line-height: normal;list-style-type: disc;margin: 0in 0in 0pt;background: white\"><span style=\"font-size: small\"><span lang=\"EN\"><span style=\"font-family: Segoe UI\">Support TEMPDB on local drive<\/span><\/span><\/span><\/div>\n<\/li>\n<li>\n<div class=\"MsoNormal\" style=\"line-height: normal;list-style-type: disc;margin: 0in 0in 0pt;background: white\"><span style=\"font-size: small\"><span style=\"font-family: Segoe UI\"><span lang=\"EN\">AlwaysOn Failover Cluster Instance can be a part of an AlwaysOn Availability Group<\/span> <\/span><\/span><\/div>\n<\/li>\n<\/ul>\n<div style=\"line-height: normal;list-style-type: disc;margin: 0in 0in 0pt;background: white\"><span lang=\"EN\" style=\"font-size: small\"><span style=\"font-family: Segoe UI\">\u00a0<\/span><\/span><\/div>\n<div style=\"line-height: normal;list-style-type: disc;margin: 0in 0in 0pt;background: white\"><span style=\"font-size: small\"><b><span style=\"text-decoration: underline\"><span lang=\"EN\"><span style=\"font-family: Segoe UI\">Additional Resources<\/span><\/span><\/span><\/b><b><\/b><\/span><\/div>\n<div style=\"line-height: normal;list-style-type: disc;margin: 0in 0in 10pt\"><span style=\"font-family: Segoe UI;font-size: small\"><span lang=\"EN\">For more information on AlwaysOn please go to the <\/span><a style=\"cursor: auto\" href=\"http:\/\/msdn.microsoft.com\/en-us\/sqlserver\/gg490638(en-us,MSDN.10)\"><span lang=\"EN\"><span style=\"color: #0000ff\"><span style=\"text-decoration: underline\">AlwaysOn Resource Center<\/span><\/span><\/span><\/a><span lang=\"EN\">. This has links to AlwaysOn Team blog, forum, documentation, download etc.<\/p>\n<p><\/span><\/span><span style=\"font-family: Segoe UI;font-size: small\"><span lang=\"EN\">Also feel free to look at the 2011 TechEd sessions on AlwaysOn which contains videos and demos on AlwaysOn\u00a0 \u2013 <\/span><a style=\"cursor: auto\" href=\"https:\/\/channel9.msdn.com\/Events\/TechEd\/NorthAmerica\/2011\/DBI302\"><span lang=\"EN\"><span style=\"color: #0000ff\"><span style=\"text-decoration: underline\">Introduction session<\/span><\/span><\/span><\/a><span lang=\"EN\"> &amp; <\/span><a style=\"cursor: auto\" href=\"https:\/\/channel9.msdn.com\/Events\/TechEd\/NorthAmerica\/2011\/DBI404\"><span lang=\"EN\"><span style=\"color: #0000ff\"><span style=\"text-decoration: underline\">Drill Down session<\/span><\/span><\/span><\/a><span lang=\"EN\">.<\/p>\n<p><\/span><\/span><span style=\"font-size: small\"><span lang=\"EN\"><span style=\"font-family: Segoe UI\">\u00a0We are eagerly looking forward to feedback on the product, which you can provide to our engineers directly on our <\/span><\/span><a style=\"cursor: auto\" href=\"https:\/\/connect.microsoft.com\/SQLServer\/Feedback\"><span style=\"font-family: Segoe UI;color: #0000ff\"><span style=\"text-decoration: underline\">Connect Site<\/span><\/span><\/a><span class=\"MsoHyperlink\"><span style=\"font-family: Segoe UI;color: #0000ff\"><span style=\"text-decoration: underline\">.<\/span><\/span><\/span><span lang=\"EN\"><span style=\"font-family: Segoe UI\"><br \/>\n<\/span><\/span><span style=\"font-family: Segoe UI;color: #000000\"><span style=\"color: #333333\"><br \/>\n<\/span><\/span><\/span><\/div>\n<div id=\"scid:5737277B-5D6D-4f48-ABFC-DD9C333F4C5D:bc1e8dfd-c44c-411f-89f7-5a217fad3498\" class=\"wlWriterEditableSmartContent\" style=\"margin: 0px;float: none;padding: 0px\">\n<div id=\"38d73128-79c1-4c84-bb5f-f36b5853741d\" style=\"margin: 0px;padding: 0px\">\n<div><\/div>\n<\/div>\n<\/div>\n<p><span style=\"font-size: small\"><span style=\"font-family: Segoe UI\">Santosh Balasubramanian<br \/>\n<\/span><span style=\"font-family: Segoe UI;color: #000000\">Senior Program Manager<\/span><span style=\"font-family: Segoe UI\"><span lang=\"EN\"><br \/>\n<\/span><span style=\"color: #000000\">Microsoft SQL Server Engine Team<\/span><\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>What is SQL Server AlwaysOn? SQL Server AlwaysOn is the new high availability and disaster recovery solution for the next release of SQL Server. Using AlwaysOn businesses can achieve increased application availability for their mission critical applications and get higher returns on their high availability investments through better utilization of hardware resources.<\/p>\n","protected":false},"author":1457,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ep_exclude_from_search":false,"_classifai_error":"","_classifai_text_to_speech_error":"","footnotes":""},"post_tag":[],"product":[],"content-type":[2448],"topic":[],"coauthors":[2487],"class_list":["post-4303","post","type-post","status-publish","format-standard","hentry","content-type-updates","review-flag-1593580414-58","review-flag-2-1593580436-981","review-flag-4-1593580446-456","review-flag-free-1593619513-128","review-flag-new-1593580247-437"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>AlwaysOn - New in SQL Server Code Name &quot;Denali&quot; CTP3 - Microsoft SQL Server Blog<\/title>\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.microsoft.com\/en-us\/sql-server\/blog\/2011\/08\/18\/alwayson-new-in-sql-server-code-name-denali-ctp3\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"AlwaysOn - New in SQL Server Code Name &quot;Denali&quot; CTP3 - Microsoft SQL Server Blog\" \/>\n<meta property=\"og:description\" content=\"What is SQL Server AlwaysOn? 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