Juntao Qiu abruzzi

Deploy Rails app to digitalocean with nginx, unicorn, capistrano & postgres

Create droplet of your liking (ubuntu 12.10 x32)

ssh to root in terminal with your server ip

ssh root@123.123.123.123

Add ssh fingerprint and enter password provided in email

Vagrant Setup

This tutorial guides you through creating your first Vagrant project.

We start with a generic Ubuntu VM, and use the Chef provisioning tool to:

install packages for vim, git
create user accounts, as specified in included JSON config files
install specified user dotfiles (.bashrc, .vimrc, etc) from a git repository

Afterwards, we'll see how easy it is to package our newly provisioned VM

Hey! I saw this has been indexed by the search engines. It is a first draft of a post I ended up publishing on my blog at: Scaling PostgreSQL With Pgpool and PgBouncer

Thanks for stopping by!

PostgreSQL and Pgpool Architecture

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

	module.exports = function(grunt) {
	// Project configuration.
	grunt.initConfig({
	compass: {
	dist: {
	options: {
	sassDir: 'sass',
	cssDir: 'css',
	environment: 'production'
	}

	<!DOCTYPE html>
	<html>
	<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
	<meta name="apple-mobile-web-app-capable" content="yes">
	<title>D3.js and Openlayers - US States</title>
	<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/openlayers/2.13.1/theme/default/style.css" type="text/css">
	<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.9.0/themes/blitzer/jquery-ui.css" type="text/css">
	<script src="http://d3js.org/d3.v2.min.js?2.9.3"></script>

	/**
	* Linkurious 2012, all rights reserved.
	* Sébastien Heymann <seb@linkurio.us>,
	* Romain Yon <romain@linkurio.us>
	*
	* Please use http://jsbeautifier.org/ and indent with 2 spaces.
	*
	* Lib docs:
	* http://twitter.github.com/bootstrap/
	* http://docs.jquery.com/

	<script type="text/ng-template" id="one.html">
	<div>This is first template</div>
	</script>

	<script type="text/ng-template" id="two.html">
	<div>This is second template</div>
	</script>

	Omniauth Facebook Error - Faraday::Error::ConnectionFailed
	Faraday::Error::ConnectionFailed
	SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed

	Rails.application.config.middleware.use OmniAuth::Builder do
	provider :facebook, '<key from fb>', '<another key from fb>'
	end

	class SessionsController < ApplicationController
	def create