Tan Duong tanduong

gpyWWz

DebounceRequestQueue

#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

	# turn on webkit driver debug
	$webkit_debug = false
	$wait_time = 5
	$use_chrome_instead_of_firefox = true

	def set_webkit_driver()
	if $webkit_debug
	Capybara.javascript_driver = :webkit_debug
	else
	Capybara.javascript_driver = :webkit

	var Dropdown;

	Dropdown = (function() {
	function Dropdown($el, options) {
	this.options = options;
	this.$el = $el;
	this.setup()
	};

	Dropdown.prototype.defaults = {

	Tmux
	=================

	Create new session
	tmux new -s <session name>

	Suspend session:
	Ctrl + b + z

	Attach session:

	<html ng-app="buttons">
	<div button-group>
	<div button-main>
	<div>Main</div>
	</div>
	<div button-item>
	<div>Item 1</div>
	</div>
	<div button-item>
	<div>Item 2</div>

	<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/jasmine/2.3.4/jasmine.min.css">
	<script src="//cdnjs.cloudflare.com/ajax/libs/jasmine/2.3.4/jasmine.min.js"></script>
	<script src="//cdnjs.cloudflare.com/ajax/libs/jasmine/2.3.4/jasmine-html.min.js"></script>
	<script src="//cdnjs.cloudflare.com/ajax/libs/jasmine/2.3.4/boot.min.js"></script>

	<!-- Lets make a simple image magnifier -->
	<div class="magnify">

	<!-- This is the magnifying glass which will contain the original/large version -->

	<!-- This is the small image -->
	<img class="small" src="http://thecodeplayer.com/uploads/media/iphone.jpg" width="200"/>
	<div class="large"></div>

	</div>