Maciej Winnicki mthenw

Backend Architectures

Twitter

ror, scala, jetty, erlang, thrift, mongrel, comet server, my-sql, memchached, varnish, kestrel(mq), starling, gizzard, cassandra, hadoop, vertica, munin, nagios, awstats

Introduce Gizzard of Twitter - 트위터의 새로운 분산 관리 라이브러리 Gizzard를 소개합니다.
The Architecture Twitter Uses to Deal with 150M Active Users, 300K QPS, a 22 MB/S Firehose, and Send Tweets in Under 5 Seconds
Scaling Twitter: Making Twitter 10000 Percent Faster

Description

This is a dashing widget intended to show metrics from a sonar repository.

Usage

This widget currently uses the list widget as a view. You just have to add this snippet to your dashboard:

Secure private web server with NodeJS

This article will explain how to set up a secure web server with NodeJS which only accepts connection from users with SSL certificates that you have signed. This is an efficient way to ensure that no other people are able to access the web server, without building a login system which will be significantly weaker.

I will not explain how to create a certificate authority (CA), create certificates or sign them. If you need to read up on this, have a look at this excelent article on how to do it with OpenSSL (Mac and Linux): https://help.ubuntu.com/community/OpenSSL#Practical_OpenSSL_Usage It is also possible to do this on a Mac with the keychain application, and I assume it is possible on a Windows machine aswell.

This architecture will allow you to have one web server communicating with an array of trusted clients, the web server itself can be on the public internet, that will not decrease the level of security, but it will only ser

A slightly updated version of this doc is here on my website.

Why I Like Go

I visited with PagerDuty yesterday for a little Friday beer and pizza. While there I got started talking about Go. I was asked by Alex, their CEO, why I liked it. Several other people have asked me the same question recently, so I figured it was worth posting.

Goroutines

The first 1/2 of Go's concurrency story. Lightweight, concurrent function execution. You can spawn tons of these if needed and the Go runtime multiplexes them onto the configured number of CPUs/Threads as needed. They start with a super small stack that can grow (and shrink) via dynamic allocation (and freeing). They are as simple as go f(x), where f() is a function.

Debugging & Profiling Node.js - Moved! Click here to be redirected to the new location.

In August 2007 a hacker found a way to expose the PHP source code on facebook.com. He retrieved two files and then emailed them to me, and I wrote about the issue:

http://techcrunch.com/2007/08/11/facebook-source-code-leaked/

It became a big deal:

http://www.techmeme.com/070812/p1#a070812p1

The two files are index.php (the homepage) and search.php (the search page)

	package main

	import(
	"log"
	"net/url"
	"net/http"
	"net/http/httputil"
	)

	func main() {

	import (
	"fmt"
	"log"
	"os"
	"sort"
	)

	// askForConfirmation uses Scanln to parse user input. A user must type in "yes" or "no" and
	// then press enter. It has fuzzy matching, so "y", "Y", "yes", "YES", and "Yes" all count as
	// confirmations. If the input is not recognized, it will ask again. The function does not return

	#
	# This config file is a combination of ideas from:
	# http://www.37signals.com/svn/posts/1073-nuts-bolts-haproxy
	# http://www.igvita.com/2008/05/13/load-balancing-qos-with-haproxy/
	# http://wiki.railsmachine.com/HAProxy
	# http://elwoodicious.com/2008/07/15/nginx-haproxy-thin-fastcgi-php5-load-balanced-rails-with-php-support/
	# http://upstream-berlin.com/2008/01/09/using-haproxy-with-multiple-backends-aka-content-switching/
	# http://wiki.railsmachine.com/HAProxy
	# http://gist.github.com/raw/25482/d39fb332edf977602c183194a1cf5e9a0b5264f9
	#

	<?php
	// app/config/assets_version.php

	$container->loadFromExtension('framework', array(
	'templating' => array(
	'engines' => array('twig'),
	'assets_version' => exec('git rev-parse --short HEAD'),
	),
	));