sergeyenin

import inspect

import collections
from collections import OrderedDict

import hug
import logging
from apispec import APISpec
from apispec.ext.marshmallow.swagger import field2parameter
from copy import copy

sergeyenin

How to setup Let's Encrypt for Nginx on Ubuntu 16.04 (including IPv6, HTTP/2 and A+ SLL rating)

There are two main modes to run the Let's Encrypt client (called Certbot):

• Standalone: replaces the webserver to respond to ACME challenges
• Webroot: needs your webserver to serve challenges from a known folder.

Webroot is better because it doesn't need to replace Nginx (to bind to port 80).

In the following, we're setting up mydomain.com. HTML is served from /var/www/mydomain, and challenges are served from /var/www/letsencrypt.

sergeyenin

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

sergeyenin

require ENV_PATH

class String
  # http://www.devarticles.com/c/a/Development-Cycles/Tame-the-Beast-by-Matching-Similar-Strings/3/
  module Soundex
    Codes = {
      'b' => 1,
      'f' => 1,
      'p' => 1,
      'v' => 1,

sergeyenin

Ruby Benchmark module: meanings of “user”, “system”, and “real”?

>> Benchmark.bm(7) { |b| b.report('Report:') { s = '' ; 10000.times { s += 'a' } }  }
			 user     system      total        real
Report:  0.150000   0.010000   0.160000 (  0.156361)

These are the same times that the Unix time command or other typical benchmarking tools would report:

user: the amount of time spent executing userspace code (i.e.: your code),

sergeyenin

source :rubygems

gem 'rake'
gem 'forgery'
gem 'cassandra-cql', :path => '../cassandra-cql'
gem 'cassandra', :path => '../cassandra'

gem 'perftools.rb'
gem 'rbtrace'

sergeyenin

gem 'pg'
group :development do
	gem 'ruby-debug'
end
gem 'rake', '~> 0.8.7'
gem 'devise'
gem 'oa-oauth', :require => 'omniauth/oauth'
gem 'omniauth'
gem 'haml'
gem 'dynamic_form'

sergeyenin

require 'ray'

class Life
  Width  = 1920
  Height = 1080

  Size = Ray::Vector2[Width, Height]

  def initialize
    @image  = Ray::Image.new Size