redliu312

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

redliu312

#!/bin/bash

readonly DB_FILE="$(pwd)/images.db"
readonly IMG_DIR="$(pwd)/images"

save-images() {
  echo "Create ${DB_FILE}"
  echo "$(docker images|grep -v 'IMAGE ID'|awk '{printf("%s %s %s\n", $1, $2, $3)}'|column -t)" > "${DB_FILE}"
  
  echo "Read ${DB_FILE}"

redliu312

/*
The MIT License (MIT)

Copyright (c) 2014 Ismael Celis

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is

redliu312

# -*- coding: utf-8 -*-
#
# Author: Ian Eure <http://github.com/ieure>, <http://atomized.org>
#

"""Enter the debugger on exceptions.

example:

from __future__ import with_statement

redliu312

#!/bin/sh
#
#   Startup/shutdown script for Git Daemon
#   chkconfig: 345 56 10
#
#   description: Startup/shutdown script for Git Daemon
#
. /etc/init.d/functions

DAEMON=/usr/libexec/git-core/git-daemon

redliu312

Python3 Virtualenv Setup

Requirements

• Python 3
• Pip 3

$ brew install python3

redliu312

#!/usr/bin/env bash
# memusg -- Measure memory usage of processes
# Usage: memusg COMMAND [ARGS]...
#
# Author: Jaeho Shin <netj@sparcs.org>
# Created: 2010-08-16
############################################################################
# Copyright 2010 Jaeho Shin.                                               #
#                                                                          #
# Licensed under the Apache License, Version 2.0 (the "License");          #

redliu312

# Copyright (c) 2013-2016 Kyle Gorman
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#