3014zhangshuo

# Access number
cat production.log | grep "^Processing" | wc | awk '{print $1}'

# Each IP access number
cat production.log | grep “^Processing” | awk ‘{print $4}’ | uniq -c 

# Independent IP number
cat production.log | grep "^Processing" | awk '{print $4}' | uniq | wc | awk '{print $1}'
cat production.log | grep “^Processing” | awk ‘{print $4}’ | uniq | wc -l 

3014zhangshuo

apt update && apt upgrade

apt install ruby vim git nodejs

apt install ruby-dev libxml2-dev libxslt-dev pkg-config make clang
gem install nokogiri -- --use-system-libraries

apt install libsqlite-dev
gem install sqlite3

3014zhangshuo

class DummyController < ApplicationController
  def do
    render json: { balance: 50 }
  end
end

3014zhangshuo

module A
  def self.included(target)
    v = target.instance_methods.include?(:method_name)
    puts "in included: #{v}"
  end

  def self.append_features(target)
    v = target.instance_methods.include?(:method_name)
    puts "in append features before: #{v}"
    super

3014zhangshuo

常用的几个 Ruby 版本管理工具有：rvm，rbenv，ry，rbfu。rvm 应该是最早出现、使用最多的，因为过于强大以至于违背了某个 Linux 软件开发原则，所以出现了很多轻便的替代者，其中来自 37signals 的 rbenv 就很受欢迎。ry 和 rbfu 看上去更轻便，不过使用不广泛。之前使用过rvm, 这次尝试下rbenv。

我的环境是 Ubuntu14.04

1. 安装 rbenv

rbenv的源代码托管在github，在终端中，从 github 上将 rbenv 源码 clone 到本地，然后设置 $PATH。

git clone git://github.com/sstephenson/rbenv.git ~/.rbenv
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bashrc

3014zhangshuo

# See http://m.onkey.org/running-rails-performance-tests-on-real-data
# fixed to work with Rails 3.2.8

# START : HAX HAX HAX
# Load Rails environment in 'test' mode
RAILS_ENV = "test"
require File.expand_path('../../config/environment', __FILE__)

# Re-establish db connection for 'performance' mode
silence_warnings { RAILS_ENV = "performance" }

3014zhangshuo

source 'https://rubygems.org'

gem 'rails', '3.2.3'

# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails',   '~> 3.2.3'
  gem 'coffee-rails', '~> 3.2.1'
  # See https://github.com/sstephenson/execjs#readme for more supported runtimes

3014zhangshuo

create_table :media_items do |t|
  t.string :type, :null => false, :limit => 32
  t.string :name
  t.timestamps
end

class MediaItem < ActiveRecord::Base
  validates_presence_of :kind
end

3014zhangshuo

cat access.log.1 | grep " 500 " | awk -F'"' '{print $2,",",$4,",",$6}' > /home/ubuntu/500.log
cat access.log.1 | grep " 404 " | awk -F'"' '{print $2,",",$4,",",$6}' > /home/ubuntu/404.log

3014zhangshuo

# autoload concerns
module YourApp
  class Application < Rails::Application
    config.autoload_paths += %W(
      #{config.root}/app/controllers/concerns
      #{config.root}/app/models/concerns
    )
  end
end