hungpk

WAL-E needs to be installed on all machines, masters and slaves.

How to install WAL-E

Only one machine, the master, writes WAL segments via continuous archiving. The configuration for the master postgresql.conf is:

archive_mode = on
archive_command = 'envdir /etc/wal-e.d/env wal-e wal-push %p'
archive_timeout = 60

hungpk

Ideal Postgres environment

Documentation

• Documented replication topology
• Documented network topology
• Documented interface topology - including users, passwords, connection estimates, load balancers, connection proxies
• Documented procedure, schedule for failover and testing
• Documented procedure, schedule for disaster recovery and testing

hungpk

#!/bin/sh
HOST=$1
BASE_DIR=$2
S3BUCKET=<s3-bucket>
NOW=`date +"%Y-%m-%d"`
PREFIX=pgcluu
DATA_DIR=$BASE_DIR/$PREFIX-$NOW

#kill current process
pgcluu_collectd -k -f $BASE_DIR/current/pg_cluu_collectd.pid

hungpk

#!/usr/bin/env ruby

require 'net/smtp'

unless (2..3).include? ARGV.length
  puts 'Usage: mail.rb SUBJECT TO [FROM]'
  exit 1
end

subject, to, from_ = ARGV

hungpk

module ActionMailer
  class Base
    def perform_delivery_from_header(tmail)
      method = tmail.header.delete("x-delivery-method") || :server_2
      send "perform_delivery_#{method}", tmail
    end

    def perform_delivery_server_1(tmail)
      self.class.smtp_settings = {
          address: "server1.smtp.com",

hungpk

Originally published in June 2008

When hiring Ruby on Rails programmers, knowing the right questions to ask during an interview was a real challenge for me at first. In 30 minutes or less, it's difficult to get a solid read on a candidate's skill set without looking at code they've previously written. And in the corporate/enterprise world, I often don't have access to their previous work.

To ensure we hired competent ruby developers at my last job, I created a list of 15 ruby questions -- a ruby measuring stick if you will -- to select the cream of the crop that walked through our doors.

What to expect

Candidates will typically give you a range of responses based on their experience and personality. So it's up to you to decide the correctness of their answer.

hungpk

server {
    # see: http://wiki.nginx.org/Pitfalls
    # see: http://wiki.nginx.org/IfIsEvil
    listen 80;

    root /app;
    index index.html index.htm index.php;
    error_page 404 /index.php;

    # Make site accessible from http://set-ip-address.xip.io

hungpk

Creating a Happy Git Environment on OS X

Step 1: Install Git

brew install git bash-completion bash-git-prompt

Configure things:

git config --global user.name "Your Name"

git config --global user.email "[email protected]"

hungpk

Google Docs Viewer

Only files under 25 MB can be previewed with the Google Drive viewer.

Google Drive viewer helps you preview over 16 different file types, listed below:

• Image files (.JPEG, .PNG, .GIF, .TIFF, .BMP)
• Video files (WebM, .MPEG4, .3GPP, .MOV, .AVI, .MPEGPS, .WMV, .FLV)
• Text files (.TXT)
• Markup/Code (.CSS, .HTML, .PHP, .C, .CPP, .H, .HPP, .JS)
• Microsoft Word (.DOC and .DOCX)

hungpk

var gulp = require('gulp');
var sourcemaps = require('gulp-sourcemaps');
var source = require('vinyl-source-stream');
var buffer = require('vinyl-buffer');
var browserify = require('browserify');
var watchify = require('watchify');
var babel = require('babelify');

function compile(watch) {
  var bundler = watchify(browserify('./src/index.js', { debug: true }).transform(babel));