Mark Woods mmrwoods

Peter Thiel's CS183: Startup - Class 1 Notes Essay

Here is an essay version of my class notes from Class 1 of CS183: Startup. Errors and omissions are my own. Credit for good stuff is Peter’s entirely.

CS183: Startup—Notes Essay—The Challenge of the Future

Purpose and Preamble

Web fonts are pretty much all the rage. Using a CDN for font libraries, like TypeKit or Google Fonts, will be a great solution for many projects. For others, this is not an option. Especially when you are creating a custom icon library for your project.

Rails and the asset pipeline are great tools, but Rails has yet to get caught up in the custom web font craze.

As with all things Rails, there is more then one way to skin this cat. There is the recommended way, and then there are the other ways.

The recommended way

Here I will show how to update your Rails project so that you can use the asset pipeline appropriately and resource your files using the common Rails convention.

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

	#!/bin/bash
	#
	# PostgreSQL Backup Script Ver 1.0
	# http://autopgsqlbackup.frozenpc.net
	# Copyright (c) 2005 Aaron Axelsen <[email protected]>
	#
	# This script is based of the AutoMySQLBackup Script Ver 2.2
	# It can be found at http://sourceforge.net/projects/automysqlbackup/
	#
	# The PostgreSQL changes are based on a patch agaisnt AutoMySQLBackup 1.9

	# http://ariejan.net/2011/09/24/rspec-speed-up-by-tweaking-ruby-garbage-collection
	#
	# Usage:
	# DEFER_GC=10 rspec spec/
	# DEFER_GC=10 cucumber features/
	#
	# put it to spec/support/deferred_garbage_collection_all_in_one.rb
	# or feature/support/hooks.rb
	class DeferredGarbageCollection
	DEFERRED_GC_THRESHOLD = (ENV['DEFER_GC'] \|\| -1).to_f

	Bugsnag::Notification.class_eval do
	class << self
	def deliver_exception_payload_with_thread(*args)
	Thread.new do
	Bugsnag::Notification.deliver_exception_payload_without_thread(*args)
	end
	end

	alias_method :deliver_exception_payload_without_thread, :deliver_exception_payload
	alias_method :deliver_exception_payload, :deliver_exception_payload_with_thread

	# Reconfigures ActionDispatch's TLD handling dynamically based on the request
	# host, so you don't have to mess with config.action_dispatch.tld_length for
	# cross-device testing using xip.io and friends
	#
	# Examples:
	# use Rack::HostBasedTldLength, /xip\.io/, 5
	class Rack::HostBasedTldLength

	def initialize(app, host_pattern, host_tld_length)
	@app = app

	# this monit config goes in /etc/monit/conf.d

	check process puma_master
	with pidfile /data/myapp/current/tmp/puma.pid
	start program = "/etc/monit/scripts/puma start"
	stop program = "/etc/monit/scripts/puma stop"
	group myapp

	check process puma_worker_0
	with pidfile /data/myapp/current/tmp/puma_worker_0.pid

	" Highlight long lines (>80)

	autocmd BufEnter * highlight OverLength ctermbg=darkgrey guibg=#592929
	autocmd BufEnter * match OverLength /\%81v.*/
	autocmd BufEnter * let w:long_line_match = 1

	fu! LongLineHighlightToggle()
	highlight OverLength ctermbg=darkgrey guibg=#592929
	if exists('w:long_line_match')
	match OverLength //