Carlo Pires carlopires

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?

	<!DOCTYPE html>
	<!--[if lt IE 7]> <html class="no-js lt-ie9 lt-ie8 lt-ie7" lang="en"> <![endif]-->
	<!--[if IE 7]> <html class="no-js lt-ie9 lt-ie8" lang="en"> <![endif]-->
	<!--[if IE 8]> <html class="no-js lt-ie9" lang="en"> <![endif]-->
	<!--[if gt IE 8]><!--> <html class="no-js" lang="en"> <!--<![endif]-->
	<head>
	<meta charset="utf-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
	<title>HTML5 date test</title>
	<meta name="description" content="HTML5 date test with Bootstrap 3 and webshims">

	<!DOCTYPE html>
	<!--[if lt IE 7]> <html class="no-js lt-ie9 lt-ie8 lt-ie7" lang="en"> <![endif]-->
	<!--[if IE 7]> <html class="no-js lt-ie9 lt-ie8" lang="en"> <![endif]-->
	<!--[if IE 8]> <html class="no-js lt-ie9" lang="en"> <![endif]-->
	<!--[if gt IE 8]><!--> <html class="no-js" lang="en"> <!--<![endif]-->
	<head>
	<meta charset="utf-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
	<title>HTML5 date test</title>
	<meta name="description" content="HTML5 date test with Bootstrap 3 and webshims">

	"""
	@author: Carlo Pires <[email protected]>

	To generate the certificate with openssl:
	openssl genrsa 2048 > o365app.key
	openssl req -new -x509 -nodes -sha512 -days 365 -key o365app.key > o365app.crt

	To generate key credentials for MS Azure:
	python gen_key_credentials.py o365app.crt
	"""

	"""
	@author: Carlo Pires <[email protected]>
	"""
	import argparse


	class Commands(object):
	def status(self, args):
	print('status for {}'.format(args.module))

	import eventlet
	eventlet.patcher.monkey_patch(select=True, socket=True)

	import json
	import time
	import codecs
	import httplib2

	import logging
	logging.basicConfig(level=logging.DEBUG)

	from wsgiref.handlers import format_date_time

	import curio
	from curio import network
	from curio import socket
	from curio.io import Socket

	import h11
	import tls

	require("lsqlite3")

	-- Igmar: Wanneer closen we dat DB object eigenlijk ?
	db = sqlite3.open('/etc/asterisk/users.sqlite')

	--CONSOLE = "Console/dsp" -- Console interface for demo
	--CONSOLE = "DAHDI/1"
	--CONSOLE = "Phone/phone0"

	TRUNK = "DAHDI/G1"

	class Graph:
	def __init__(self):
	self.nodes = set()
	self.edges = defaultdict(list)
	self.distances = {}

	def add_node(self, value):
	self.nodes.add(value)

	def add_edge(self, from_node, to_node, distance):

	from collections import defaultdict, deque


	class Graph(object):
	def __init__(self):
	self.nodes = set()
	self.edges = defaultdict(list)
	self.distances = {}

	def add_node(self, value):