Skip to content

Instantly share code, notes, and snippets.


#MongoDB 3.2.x Replica Sets on AWS EC2 A MongoDB replica set provides a mechanism to allow for a reliable database services. The basic replica set consists of three servers, a primary, a secondary and an arbitrator. The primary and secondary both hold a copy of the data. The arbitrator is normally a low spec server which just monitors the other servers and help with the failover process. In production, there can be more than three servers.

To setup mongo as a replica set on Amazon Web Services EC2 you need to first setup a security group with ssh on port 22 and mongodb on port 27017. You then need to create three servers. Select Ubuntu 14.04 LTS x64 and a micro (or bigger depending on your database size, ideally you should have enough memory to match your database size) instance for the primary and secondary and a nano instance for the arbitrator.

##Adjust the File System on each Server The operating system by default will update the last access time on a file. In a high data throughput database application

ideaOwl / database.rules.json
Created Aug 7, 2018 — forked from codediodeio/database.rules.json
Common Database Rules for Firebase
View database.rules.json
// No Security
"rules": {
".read": true,
".write": true
ideaOwl / font_grabber.rb
Last active Apr 24, 2017 — forked from ttscoff/font_grabber.rb
Give it a <link> from Google fonts and get back CSS with fonts embedded
View font_grabber.rb
# encoding: utf-8
# Grab google web fonts and embed them as base64 data URIs
# <>
require 'base64'
if ARGV.length > 0
input = ARGV
elsif STDIN.stat.size > 0
input =\n+/)
ideaOwl / .block
Last active Jul 22, 2016 — forked from mbostock/.block
View .block
license: gpl-3.0
height: 600
border: no