nvasilakis

Lab Session 1

An introduction to our environment

• Note: This file includes markup. Until we incorporate .md markup, [you can read the html version here] (https://gist.github.com/nvasilakis/8605902#file-lab1-md)

Plan for today

• 10' VM/Linux setup and issues

• 30' Shell (bash, scripting, zsh, screen, environment)

nvasilakis

Lab Session 2

Web Servers and Concurrency

• Note: This file includes markup. Until we incorporate .md markup, [you can read the html version here] (https://gist.github.com/nvasilakis/8759837#file-lab2-md)

Plan for today:

• 20' Server Architectures

nvasilakis

// Take for example the following methods:

void method_1(int a, out int b, ref int c) {
  //implementation
}
void method_2(Object o, out Object p, ref Object q) {
  //implementation
}

// Which are later called with values

nvasilakis

The objective of this post is to get you from absolutely nothing, to a fully functional nodejs environment.
Software used: Ubuntu 11.10, Nodejs v0.6.12, Nginx, MongoDB, Redis, and NPM modules.

1. Download and install the latest version of Ubuntu: http://www.ubuntu.com/download (don't select any extra items to install when prompted)
2. Once you are logged in and are at your Ubuntu command prompt, install the necessary software you will need:
  a. sudo apt-get install openssh-server
  b. sudo apt-get install libssl-dev
  c. sudo apt-get install git
  d. sudo apt-get install g++
  e. sudo apt-get install make

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#!/bin/sh

#
# chkconfig: 35 99 99
# description: Node.js /home/nodejs/sample/app.js
#

. /etc/rc.d/init.d/functions

USER="nodejs"

nvasilakis

sudo apt-get update
sudo apt-get upgrade
sudo apt-get install nginx
sudo service nginx start
sudo apt-get install python-software-properties
sudo apt-add-repository ppa:chris-lea/node.js
sudo apt-get update
sudo apt-get install nodejs

sudo mkdir /var/www/

nvasilakis

Ten years after TCP’s development, theoretical analyses showed that TCP’s
congestion-control algorithm serves as a distributed asynchronous-optimization
algorithm that results in several important aspects of user and network performance
being simultaneously optimized [Kelly 1998]. A rich theory of congestion control
has since been developed [Srikant 2004].

Using this formula, we can see that in order to achieve a throughput of 10 Gbps,
today’s TCP congestion-control algorithm can only tolerate a segment loss probabil-
ity of 2 · 10–10 (or equivalently, one loss event for every 5,000,000,000 segments)—
a very low rate. This observation has led a number of researchers to investigate new

nvasilakis

Homework 1 | Milestone 1

About this file

This file contains information for graders of MS1 of HW1 (static web server). It is written in the .md markdown format, so you can view it in beautiful html, org or other forms. Google md markdown format for more.

nvasilakis

using Rest;

public class SimpleTweet {
 private static const string CONSUMER_KEY = "#######################"; // this comes from your app's twitter account page
 private static const string CONSUMER_SECRET = "########################################"; // this comes from your app's twitter account 
 private static const string URL_FORMAT = "https://api.twitter.com";
 private static const string REQUEST_TOKEN_URL = "https://api.twitter.com/oauth/request_token";

 private static const string FUNCTION_ACCESS_TOKEN = "oauth/access_token";
 private static const string FUNCTION_STATUSES_UPDATE = "1/statuses/update.xml";

nvasilakis

# Install scapy on osx

# grap libnet
wget http://libdnet.googlecode.com/files/libdnet-1.12.tgz
tar xfz libdnet-1.12.tgz
./configure
make
sudo make install
cd python
python2.5 setup.py install