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

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!