Tomohisa Oda linyows

#NoSQLデータモデリング技法

原文：NoSQL Data Modeling Techniques « Highly Scalable Blog

I translated this article for study. contact matope[dot]ono[gmail] if any problem.

NoSQLデータベースはスケーラビリティ、パフォーマンス、一貫性といった様々な非機能要件から比較される。NoSQLのこの側面は実践と理論の両面からよく研究されている。ある種の非機能特性はNoSQLを利用する主な動機であり、NoSQLシステムによく適用されるCAP定理がそうであるように分散システムの基本的原則だからだ。一方で、NoSQLデータモデリングはあまり研究されておらず、リレーショナルデータベースに見られるようなシステマティックな理論に欠けている。本稿で、私はデータモデリングの視点からのNoSQLシステムファミリーの短い比較といくつかの共通するモデリングテクニックの要約を解説したい。

本稿をレビューして文法を清書してくれたDaniel Kirkdorfferに感謝したいと思う

Nginx + Unicorn for Rails on Rackhub

Description:

This script enables you to launch your Rails application in production environment (port:80) with Nginx and Unicorn.

Installation:

Please make sure that your Gemfile in your rails application includes unicorn.

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

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.

	class BrandSweeper < ActionController::Caching::Sweeper
	observe Brand # Observers will introspect on the class, but Sweepers don't

	def after_update(brand)
	expire_action :controller => "brand", :action => :preview, :brand_id => brand.to_param
	end
	...

	module Cinch
	module Plugins
	class PluginManagement
	include Cinch::Plugin

	match(/plugin load (\S+)(?: (\S+))?/, method: :load_plugin)
	match(/plugin unload (\S+)/, method: :unload_plugin)
	match(/plugin reload (\S+)(?: (\S+))?/, method: :reload_plugin)
	match(/plugin set (\S+) (\S+) (.+)$/, method: :set_option)
	def load_plugin(m, plugin, mapping)

	# 2. Include Sweeping module in your controller(s) to have cache_sweeper
	# method to be avaliable, or right in ApplicationController so it will be
	# available in all controllers inheriting from it.

	class ApplicationController < ActionController::Base
	include ActionController::Caching::Sweeping

	# ...
	end

	template "/tmp/foo.rb"
	source "foo.rb.erb"
	cookbook "banana"
	end

	class ApplicationController < ActionController::Base
	# ...

	unless Rails.application.config.consider_all_requests_local
	rescue_from Exception, with: lambda { \|exception\| render_error 500, exception }
	rescue_from ActionController::RoutingError, ActionController::UnknownController, ::AbstractController::ActionNotFound, ActiveRecord::RecordNotFound, with: lambda { \|exception\| render_error 404, exception }
	end

	private
	def render_error(status, exception)

	#!/usr/bin/env ruby

	# List all keys stored in memcache.
	# Credit to Graham King at http://www.darkcoding.net/software/memcached-list-all-keys/ for the original article on how to get the data from memcache in the first place.

	require 'net/telnet'

	headings = %w(id expires bytes cache_key)
	rows = []

	DBQuery.prototype.p = function() {
	var args = arguments
	this.forEach(function(e) {
	var result = {}
	if(args.length == 0) {
	result = e
	} else {
	for(var i = 0; i < args.length; i++) {
	var target = e
	var keys = args[i].split('.')