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Notes on video lecture:
Installing MongoDB/node.js and Hello Worlds
Notes taken by Edward Tanguay on June 5, 2014 (go to class or lectures)
Choose from these words to fill the blanks below:
large, IO, 64, xvf, javascript, 27017, asynchronous, synchronous, callback, even, blocks
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installing MongoDB on Mac
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mongodb.org/downloads
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always use     -bit versions
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32-bit are only suitable for development
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they limit total amount of data to 4 GB
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stable releases are always         , e.g. 2.6.0
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terminal window
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tar        mongodb-osx-x86_64-2.6.0.tgz
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cd into it
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bin where the action is
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mongo is shell to connect database
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mongod runs the server
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sudo bash
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mkdir -p /data/db
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chmod 777 /data/db
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not good for production of course
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start mongo server
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./mongod
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starts up
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listening on port            (default)
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start mongo shell
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./mongo
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test
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db.names.insert({'name':'Joe'})
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db.names.find()
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installing on Windows
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mongodb.org/downloads
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always 64-bit if you can
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find out:
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powershell
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wmic os get osarchitecture
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130 MB
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in Program Files
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server:
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mongod.exe
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\data\db does not exist
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create directories
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client
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new window
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mongo.exe
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db.names.insert({'name':'Joe'})
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db.names.find()
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introduction to Mongo shell
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show dbs
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use demo (creates it since it doesn't exist)
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db.things.insert({'a':1, 'b': 2, 'c': 3})
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db.things.insert({'d':4, 'e': 5})
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db.things.find({'a':1})
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we are in a complete                      environment, so we can do anything that is supported by the V8 javascript engine
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for (var i = 0; i <= 10; i++) { db.things.insert({'x':i})}
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JSON
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basic structure
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human readable format
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key/value pairs
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ObjectId field unique across system
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value types
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many different value types
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you can have same keys with different types
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basic nesting
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nested array: 'colors' : ['red','black']
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nested object (with attributes with key/values)
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deep nesting
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students with names and activities
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you can show it like a javascript object
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and modifty it as a json object
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installing node.js
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install on Mac
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nodejs.org
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click install
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run through it
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test
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node
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console.log("hello world");
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install on windows
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nodejs.org
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download, install
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go to: C:\Program Files\nodejs\
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node.exe
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console.log('hello world');
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asynchronous vs. synchronous
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two ways of handling operations that don't require active work on the currently running thread or process
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usually these are referring to     
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mongo shell is                        while node.js is                         
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mongo shell
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var doc = db.coll.findOne();
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printjson(doc);
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node.js
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overhead code to connect to db
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not getting a return value but passing a                  function, passing an err and document value
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...function(err,doc) {
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db.close();
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advantage of asynchronous is that it can handle a            number of users
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the mongo shell              other users until the values come back from the db
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run it:
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mongo script.js
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node app.js
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helloworld server in node.js
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console.log('testing');
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now make web server
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var http = require('http');
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var server = http.createServer(function (request, response) {...
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then http://localhost:8000/
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see: howtonode.org/hello-node
MongoDB Introduction
Installing MongoDB/node.js and Hello Worlds
MongoDB, node.js, Express and SWIG
Basic Querying in MongoDB
More Querying in MongoDB
MongoDB CRUD via Node.js
Comparing RDBMS and MongoDB Schema Design