Ryan Smith ryansmith3136

$ git clone https://github.com/shushu/shushud
$ cd shushud
$ heroku create my-shushud
$ git push heroku master

Links:

Ruby At Heroku

Where We Use Ruby

Web API
HTTP API
Dyno Management
Dynos

Where We Use Something Else:

Beta Features

Log Convetnions
Last Value Computation

This beta convention is running in production today. Start using it immediately.

Log Conventions

Counter

Signup process was thorough but complete.
Can ssh into my new server in less than a minute.
They have a lot of custom terminology and no single page to define it. E.g. What is the difference between a virtual machine and a smart machine?

Have you ever wondered about the least amount of memory a C or Go program will use on a 64bit Linux machine? Kr & I have, here is the results of our curiosity:

A simple C program:

void
main()
{
  for (;;) {
 }

Service Visibility

The purpose of service visibility is to reconcile the execution of software with the agreement between the provider & customer of the service. Thus, the service must have customers who are aware that they are in fact customers of the service and furthermore are aware of the expected level of performance. In the case of an e-commerce site, the customers of the service are the visitors to the site and the agreed level of service is such that the customer views pages at some small epsilon + the speed of light. The service level agreement is arbitrary and can be estimated by the service provider. (e.g. 100ms)

Service providers need tools to help reconcile each customer's interaction with the service to understand if there are any breaches in agreement. When the agreement is breached, visibility tooling should provide help in debugging the violating component that lead to the breach. Surfacing information to service operators with the least amount of paing is a challenge accepted by makers

	# Add this file to /lib/health.rb
	# Require in config/application.rb
	# require File.join(File.dirname(__FILE__), '../lib/health.rb')
	# Load in config/application.rb
	# config.middleware.use Heroku::HttpHealth
	# Be sure to put this middleware at the front of all other middlewares. Don't want authentication on this guy.

	class Heroku::HttpHealth
	def initialize(app)
	@app = app

	loop do
	$stdout.puts("at=begin")
	sleep(5)
	$stdout.puts("at=end")
	end

	export t=$(date +%s)
	lockfile $t #create lock. Try running `lockfile $t` in another shell.
	rm -f $t #delete lock