Ankit Goyal goyalankit

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

303 See Other

Location: https://github.com/wsargent/docker-cheat-sheet

Hi there!

The docker cheat sheet has moved to a Github project under https://github.com/wsargent/docker-cheat-sheet.

Please click on the link above to go to the cheat sheet.

This is a document full of notes of all the things that have hung me up getting into Python's new asyncio library. I mostly use it for tools that schlep data around between file systems, databases, and search engines for work. So lots of io. Usually I use gevent and python 2.7. But recently I've been trying to get more into asyncio and here I'm going to document all the things that I felt important to know or that tripped me up.

1. Thoroughly understand yield, and non asyncio coroutines

The first thing you need to do is write some coroutines without asyncio. This means understanding the yield keyword and how it can be used to create generators. Then next the protocol for sending/receiving from generator objects.

Recall generators are a special kind of iterator. When you specify a generator like so, you can use it in a for loop:

def generator()

for i in range(0, 5):

Linux NetFilter, IP Tables and Conntrack Diagrams

IPTABLES TABLES and CHAINS

IPTables has the following 4 built-in tables.

1) Filter Table

Filter is default table for iptables. So, if you don’t define you own table, you’ll be using filter table. Iptables’s filter table has the following built-in chains.

	def spiral(h, w, r, c)
	spiral = []

	step_counts = (1..Float::INFINITY).lazy.flat_map { \|n\| [n, n] }
	directions = [:up, :left, :down, :right].cycle

	while spiral.length < h * w
	spiral << (r - 1) * w + c if r.between?(1, h) && c.between?(1, w)

	if (current_step_count \|\|= 0).zero?

	This demonstrates how to make client side certificates with go

	First generate the certificates with

	./makecert.sh [email protected]

	Run the server in one terminal

	go run server.go

	#################################################################
	# = This script transfers bash history to zsh history
	# = Change bash and zsh history files, if you don't use defaults
	#
	# = Usage: ruby bash_to_zsh_history.rb
	#
	# = Author: Ankit Goyal
	#################################################################

	# change if you don't use default values

	//
	// JAZMusician.h
	// JazzyApp
	//

	#import <Foundation/Foundation.h>

	/**
	JAZMusician models, you guessed it... Jazz Musicians!
	From Ellington to Marsalis, this class has you covered.

	package main

	import (
	"encoding/json"
	"flag"
	"io"
	"net/http"

	"github.com/golang/glog"
	"golang.org/x/net/websocket"