{"id":700,"date":"2011-05-26T07:48:47","date_gmt":"2011-05-26T14:48:47","guid":{"rendered":"http:\/\/upon2020.com\/?p=700"},"modified":"2011-05-26T07:48:47","modified_gmt":"2011-05-26T14:48:47","slug":"paas-categories-technical","status":"publish","type":"post","link":"https:\/\/upon2020.com\/blog\/2011\/05\/paas-categories-technical\/","title":{"rendered":"PaaS Categories: Technical"},"content":{"rendered":"<p>Infrastructure-as-a-Service (IaaS) is fairly well-known by now. Whether Amazon, OpenStack, Eucalyptus or any proprietary offerings, the basics are all the same: virtual machines, key-value buckets etc.<\/p>\n<p>Not so for Platform-as-a-Service (PaaS). There are <a href=\"http:\/\/upon2020.com\/2011\/04\/the-ever-growing-list-of-paas-companies-and-paas-projects\/\">lots of vendors<\/a>, but the architectures and basic assumptions behind their products differ widely &#8212; and those differences are less well-known than it should be.<\/p>\n<p>Ashraf Khader, who apparently works for Microsoft in the Middle East, has done us all a great favor by <a href=\"http:\/\/blogs.msdn.com\/b\/enterprise_application_architecture\/archive\/2011\/04\/08\/styles-of-platform-as-a-service-paas.aspx\">breaking down<\/a> the technical alternatives. His categories are as follows:<\/p>\n<ul>\n<li><strong>&#8220;Instance PaaS&#8221;<\/strong>:\u00a0 within each virtual machine, only one app is deployed. His examples: Azure, Elastic Beanstalk, Engine Yard&#8217;s AppCloud.<\/li>\n<li><strong>&#8220;Framework PaaS&#8221;<\/strong>: apps are deployed to a framework. Multiple apps may share the same virtual machine, but whether they do or not is of no concern to the developer. Examples: AppEngine, Heroku, VMforce.<\/li>\n<li><strong>&#8220;Metadata PaaS&#8221;<\/strong>: A special-purpose visual programming environment acts as the (only) programming language, the execution engine is opaque to developers. Examples: WaveMaker, Cordys Business Operations Platform, Microsoft LightSwitch.<\/li>\n<\/ul>\n<p>Maybe the labels can be improved, but the categories are great. As a result, it becomes quite clear what a given PaaS can and cannot do. For example, if an app needs to perform a lot of file system-level operations, the logical choice is an &#8220;instance PaaS&#8221; with awareness of which VM is which.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Infrastructure-as-a-Service (IaaS) is fairly well-known by now. Whether Amazon, OpenStack, Eucalyptus or any proprietary offerings, the basics are all the same: virtual machines, key-value buckets etc. Not so for Platform-as-a-Service (PaaS). There are lots of vendors, but the architectures and basic assumptions behind their products differ widely &#8212; and those differences are less well-known than&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"webmentions_disabled":false,"footnotes":""},"categories":[23],"tags":[177,512,147],"class_list":["post-700","post","type-post","status-publish","format-standard","hentry","category-cloud","tag-categories","tag-cloud","tag-paas","kind-"],"kind":false,"_links":{"self":[{"href":"https:\/\/upon2020.com\/blog\/wp-json\/wp\/v2\/posts\/700","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/upon2020.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/upon2020.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/upon2020.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/upon2020.com\/blog\/wp-json\/wp\/v2\/comments?post=700"}],"version-history":[{"count":2,"href":"https:\/\/upon2020.com\/blog\/wp-json\/wp\/v2\/posts\/700\/revisions"}],"predecessor-version":[{"id":702,"href":"https:\/\/upon2020.com\/blog\/wp-json\/wp\/v2\/posts\/700\/revisions\/702"}],"wp:attachment":[{"href":"https:\/\/upon2020.com\/blog\/wp-json\/wp\/v2\/media?parent=700"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/upon2020.com\/blog\/wp-json\/wp\/v2\/categories?post=700"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/upon2020.com\/blog\/wp-json\/wp\/v2\/tags?post=700"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}