nilportugues

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

• Scaling Twitter: Making Twitter 10000 Percent Faster
• Scaling Twitter
• Blaine Cook on Scaling Twitter - YouTube

nilportugues

Side nav play

I've never been a big fan of icon-only side navs. So I made a few..

NOTE: I am simply testing interaction. Some of the code is sloppy or impractical. Use with caution.

A Pen by Michael Arestad on CodePen.

License.

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• Enable the tracer on your xdebug.ini file (see the xdebug.ini file).
• If you are gonna trace an http request, make sure your xdebug.trace_output_dir is writable by the webserver user (www-data).
• Execute your script or your request. You can use produce_segmentation.php to test.
• See the trace file(s) on your xdebug.trace_output_dir.

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#!/bin/sh

# Converts a mysqldump file into a Sqlite 3 compatible file. It also extracts the MySQL `KEY xxxxx` from the
# CREATE block and create them in separate commands _after_ all the INSERTs.

# Awk is choosen because it's fast and portable. You can use gawk, original awk or even the lightning fast mawk.
# The mysqldump file is traversed only once.

# Usage: $ ./mysql2sqlite mysqldump-opts db-name | sqlite3 database.sqlite
# Example: $ ./mysql2sqlite --no-data -u root -pMySecretPassWord myDbase | sqlite3 database.sqlite

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<?php
/*
  GlobalMercator - part of Aggregate Map Tools
	Version 1.0
	Copyright (c) 2009 The Bivings Group
	All rights reserved.
	Author: John Bafford
	
	http://www.bivings.com/
	http://bafford.com/softare/aggregate-map-tools/

nilportugues

Reposted from Qiita

For almost a year now, I've been using this "flux" architecture to organize my React applications and to work on other people's projects, and its popularity has grown quite a lot, to the point where it shows up on job listings for React and a lot of people get confused about what it is.

Why I'm tired of using and teaching flux

There are a billion explainations on the internet, so I'll skip explaining the parts. Instead, let's cut to the chase -- the main parts I hate about flux are the Dispatcher and the Store's own updating mechanism.

If you use a setup similar to the examples in facebook/flux, and you use flux.Dispatcher, you probably have this kind of flow:

nilportugues

#!/bin/python
# -*- coding: utf-8 -*-

from time import sleep
from random import randint
from selenium import webdriver
from pyvirtualdisplay import Display

class MuncherySpider():

nilportugues

JWT Kong Example

• Get and Start Kong and Co

git clone git@github.com:Mashape/docker-kong.git
cd docker-kong/compose
docker-compose up

• Create Kong API Route

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Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

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# to cut first 3 seconds and length 8 seconds (custom step done for each file)
ffmpeg -ss 3 -t 8 -i VID00080.MP4 -vcodec copy -acodec copy white.MP4

# to burn in the timecode (r=framerate) (use in loop like below)
# ffmpeg -i $MOVIE -vf "drawtext=fontfile=/Users/artsyinc/Library/Fonts/PxPlus_VGA_SquarePx.ttf: fontsize=128: timecode='00\:00\:00\:00': r=30: x=(w-tw)/2: y=h-(2*lh): fontcolor=white: box=1: boxcolor=0x00000000@1" timecode/$MOVIE

# to speed up
for MOVIE in $(ls | grep MP4);
do LENGTH=$(ffprobe -i $MOVIE -show_format -loglevel quiet | egrep -oE 'duration=(\d+)' | awk -F= '{print $2}');
RATIO=$(echo 7.0/$LENGTH | bc -l);