Brandon Cook phylake

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?

Sample service script for debianoids

Look at LSB init scripts for more information.

Usage

Copy to /etc/init.d:

# replace "$YOUR_SERVICE_NAME" with your service's name (whenever it's not enough obvious)

	probe kernel.function("tcp_send_challenge_ack") {
	printf("tcp_send_challenge_ack local=%s:%d remote=%s:%d\n",
	format_ipaddr(tcpmib_local_addr($sk), AF_INET),
	tcpmib_local_port($sk),
	format_ipaddr(tcpmib_remote_addr($sk), AF_INET),
	tcpmib_remote_port($sk)
	);
	}

	wget http://packages.erlang-solutions.com/erlang-solutions_1.0_all.deb
	sudo dpkg -i erlang-solutions_1.0_all.deb
	sudo apt-get update
	sudo apt-get install -y erlang

	module Main where

	class A a where
	class B a where

	foo :: (A a, B b) => IO a -> (a -> IO b) -> IO ()
	foo _ func = return ()
	where
	-- this breaks because func is not passed in
	barBroken :: (A a, B b) => a -> IO b

	-- warp-2.1.5.2
	-- ghc -O2 -threaded -rtsopts warp
	-- ./warp +RTS -N -A1G
	{-# LANGUAGE OverloadedStrings #-}
	module Main where

	import Blaze.ByteString.Builder (copyByteString)
	import Data.Text (unpack)
	import Network.HTTP.Types.Status (status200)
	import Network.Wai

	# forward local port 8080 to remotehost.com:3001
	ssh -L 8080:localhost:3001 -N [email protected]

	#!/bin/bash
	# LC_CTYPE is for darwin
	cat /dev/urandom \| LC_CTYPE=C tr -cd 'a-f0-9' \| head -c 32

	* text=auto
	*.bat text eol=crlf