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The Twelve-Factor App: Backing Services, Building and Releasing, Stateless Processes

By Coding Blocks

  Surveys – Wow we forget about them and ramble...sorry guys!   Mark Tinsley – PHP Composer – thanks for the tip!https://getcomposer.org/   Joe made a game in Javascript (using dozens of libraries): Box Pusher! (game name of the year)https://github.com/THEjoezack/BoxPusher   Allen's cry for writing black-boxed, encapsulated code...Episode on Encapsulation: http://www.codingblocks.net/episode23 Episode on SOLID Design: http://www.codingblocks.net/episode7   Probably want to listen to the first three parts of the 12 Factor App if you missed it: http://www.codingblocks.net/episode32 IV. Backing Services Any resource consumed over the network: databases, mail servers, cloud services, etc. Anything external to your app (but could be local to your environment) Should not have to change any code to redeploy – should be config changes if anything Clearly Tech – Importance Rating: High   We've mentioned Splunk, and if you're not familiar, it's an enterprise piece of software that will aggregate logs from multiple sources (servers, computers, etc):http://www.splunk.com/en_us/products/splunk-enterprise.html   Bug in Visual Studio that cost one person $6,500 in a few hours: https://www.humankode.com/security/how-a-bug-in-visual-studio-2015-exposed-my-source-code-on-github-and-cost-me-6500-in-a-few-hours   V. Build, Release, Run Build stage – transform which converts the code repo into an executable bundle Release stage – combines the build with the required config and deposits it somewhere Run – runs the app in the execution environment (development, staging, production, other) Rolling back may be more complicated when you start talking about database schemas / data changes Clearly Tech – Importance Rating: Conceptual???   Version numbers? What do you prefer? Version numbers with major and minor revisions? Or do you prefer timestamps?     VI. Processes Stateless and Share Nothing No local session Make sure saving files go to an available repository Clearly Tech – Importance Rating: High (Joe wants higher than high)   Resources We Like http://www.12factor.net http://www.clearlytech.com/2014/01/04/12-factor-apps-plain-english/ http://devcenter.heroku.com/articles/architecting-apps   Tips   Allen: Find problematic queries that are killing your SQL Server...replace 123 with the spid from sp_who2.   sp_who2 'active' DBCC INPUTBUFFER(123)   If you want to be mean....replace 123 with the spid from sp_who2 KILL 123   Additionally, if there's high CPU and low I/O, it's likely either a missing or a fragmented index.   Joe: Tortoise Git https://tortoisegit.org/   Mike: Tip of the week is the Pseudocode podcasthttp://pseudocode.fm/   And...don't be lazy. We can't seem to get off our tails and get a business card made!    

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