Thomas D-system

Internet Scale Services Checklist

A checklist for designing and developing internet scale services, inspired by James Hamilton's 2007 paper "On Desgining and Deploying Internet-Scale Services."

http://mvdirona.com/jrh/talksandpapers/jamesrh_lisa.pdf

Basic tenets

Does the design expect failures to happen regularly and handle them gracefully?
Have we kept things as simple as possible?

	exceptions = []
	ObjectSpace.each_object(Class) do \|k\|
	exceptions << k if k.ancestors.include?(Exception)
	end
	puts exceptions.sort { \|a,b\| a.to_s <=> b.to_s }.join("\n")

	## To create a new project: `rails new MY_APP -m __FILE__`
	## To run on existing projects: `bin/rails app:template LOCATION=__FILE__`

	##
	# Generate Gemfile.lock
	##
	bundle install

	git add: '.'
	git commit: %Q{ -m 'Initial commit: Rails vanilla' }

	class IsinCodeValidator
	ISIN_FORMAT = '^[A-Z]{2}[A-Z0-9]{9}[0-9]$'.freeze
	ISIN_REGEX = Regexp.new(ISIN_FORMAT).freeze
	LETTER_TO_CODE_VALUE = 55 # Ascii code for 'A' == 65 && 'A' == 10 in isin calculation cod

	def self.valid?(str)
	return false if str.nil? \|\| !str.match?(ISIN_REGEX)

	proc_isin = str.split(//)
	key = proc_isin.pop.to_i

	[user]
	name = Thomas Brennetot
	email = [email protected]
	[core]
	editor = code --wait
	[commit]
	verbose = true
	[diff]
	tool = vscode
	[difftool "vscode"]

	---
	AWSTemplateFormatVersion: 2010-09-09
	Description: >-
	Configures CloudWatch logs stream and Kinesis Data Firehose to
	send logs to AppSignal from an existing CloudWatch log group.

	It must be deployed in the same region and same account as the CloudWatch log group.

	Implements all the steps from AppSignal documentation all at once:
	https://docs.appsignal.com/logging/platforms/cloudwatch.html

	---
	BUNDLE_BUILD__LIBXML-RUBY: "--use-system-libraries=true --with-xml2-include=/usr/local/opt/libxml2/include/libxml2/"
	BUNDLE_BUILD__MYSQL2: "--use-system-libraries=true --with-mysql-include=/usr/local/opt/mysql/include/mysql/"

	# docker stop mysql_5.7
	# docker run -p 3306:3306 -e MYSQL_ALLOW_EMPTY_PASSWORD=true -e MYSQL_DATABASE=circle_test -e MYSQL_HOST=127.0.0.1 -e MYSQL_USER=root --shm-size 2G --name mysql_5.7 circleci/mysql:5.7-ram
	docker restart mysql_5.7