ptarjan

Scaling your API with rate limiters

The following are examples of the four types rate limiters discussed in the accompanying blog post. In the examples below I've used pseudocode-like Ruby, so if you're unfamiliar with Ruby you should be able to easily translate this approach to other languages. Complete examples in Ruby are also provided later in this gist.

In most cases you'll want all these examples to be classes, but I've used simple functions here to keep the code samples brief.

Request rate limiter

This uses a basic token bucket algorithm and relies on the fact that Redis scripts execute atomically. No other operations can run between fetching the count and writing the new count.

ueokande

Benchmark commands

Producer

Setup

bin/kafka-topics.sh \
  --zookeeper zookeeper.example.com:2181 \
  --create \

droustchev

from sqlalchemy.ext.compiler import compiles
from sqlalchemy.sql.expression import Insert

@compiles(Insert)
def append_string(insert, compiler, **kw):
    s = compiler.visit_insert(insert, **kw)
    if 'append_string' in insert.kwargs:
        return s + " " + insert.kwargs['append_string']
    return s

jhbabon

DCI: Chain of contexts example

Run each chain:

$ ruby full_chain.rb
$ ruby half_chain.rb
$ ruby no_chain.rb

burke

ruby-1.9.3-p327 cumulative performance patch for rbenv

This installs a patched ruby 1.9.3-p327 with various performance improvements and a backported COW-friendly GC, all courtesy of funny-falcon.

Requirements

• rbenv
• ruby-build

You will also need a C Compiler. If you're on Linux, you probably already have one or know how to install one. On OS X, you should install XCode, and brew install autoconf using homebrew.

cpatni

require 'sinatra'
require 'redis'
require 'json'
require 'date'

class String

  def &(str)
    result = ''
    result.force_encoding("BINARY")

zhengjia

=Navigating=
    visit('/projects')
    visit(post_comments_path(post))

=Clicking links and buttons=
    click_link('id-of-link')
    click_link('Link Text')
    click_button('Save')
    click('Link Text') # Click either a link or a button
    click('Button Value')

qrush

gemcutter => redis downloads spec
=================================

keys
----

downloads                     => global counter for all gem downloads
downloads:today               => sorted set for downloads from today
downloads:rubygem:rails       => counter for all rails downloads
downloads:version:rails-2.3.5 => counter for all rails 2.3.5 downloads