vOfficeware Brown Bag - NOSQL

Schema-less Databases By Zack Schwartz Brown Bag Presentations

A system of tables and fields.
Each table is a collection of specific information.
Users, Events, etc
The design of how all these tables relate to each other is known as a schema
Traditional Databases Brown Bag Presentations Schema-less Databases By Zack Schwartz

There is no schema.
Information is contained in a set of documents.
Each document has a primary key.
No enforcement or restrictions of what can be in any document.
MongoDB, CouchDB, and Cassandra are types of NoSQL databases.
Schema-less Databases Brown Bag Presentations
Primary Key : 1
First Name : John
Last Name : Smith
Twitter Act : johnsmith
Primary Key : 2
First Name : Jane
Last Name : Doe
Email : [email_address]
Twitter Act : janedoe
Primary Key : 3
Email : [email_address]
Favorite Food: Cheeseburgers
Schema-less Databases By Zack Schwartz

Documents are essentially associative arrays like:
JSON objects
PHP arrays
Python dictionaries.
Flexibility in Documents Brown Bag Presentations Schema-less Databases By Zack Schwartz

--- Case Study --- Brown Bag Presentations Schema-less Databases By Zack Schwartz

Engineer an advertising campaign management system
Automatically send a tweet if it matches a campaign's rule set.
System requires:
Multiple Campaigns
Multiple Date Ranges in a campaign
Days of the week in a date range
Multiple times of day to run campaign in date range
Multiple rules per time of day
Multiple locations per rule.
By the way, code all of this in PHP.
Ad Campaign Management System Brown Bag Presentations Schema-less Databases By Zack Schwartz

MySQL Brown Bag Presentations Schema-less Databases By Zack Schwartz

SELECT campaign_id WHERE
$date in (SELECT date_id, begin_date, end_date WHERE
camp_id = campaign_id AND
$time in (SELECT t_id, begin_time, end_time WHERE
d_id = date_id AND
$rule = (SELECT rule_id, words)...
....
....and so on..
....
Way too complex.
At least five table joins = extremely slow.

Select this Scheme Brown Bag Presentations Schema-less Databases By Zack Schwartz

MongoDB as an example
Everything in one document / associative array.
[Campaign ID]
Dates->
[0]
[begin_date]
[end_date]
Times->
[0]
[begin_time]
[end_time]
Rules->
...
[1]....
Using a NoSQL Solution Brown Bag Presentations Schema-less Databases By Zack Schwartz

Another View of NoSQL Brown Bag Presentations Schema-less Databases By Zack Schwartz

The data structure maps one to one to the database.
Wrote script to convert each associative array into objects.
Update a location
$campaign->$date[0]->$time[1]->$rule[4]->$location[0] = "New York"
Update a time
$campaign->$date[1]->$time[0].begin_time = "800"
Ad Campaign Management System Brown Bag Presentations Schema-less Databases By Zack Schwartz

db.users.find({last_name: 'Smith'}, {'ssn': 1});db.users.find().skip(20).limit(10);db.users.find().sort({last_name: 1});db.collection.find({ "field" :{$in : array}});db.foo.find({x : {$lt : 5}})db.things.insert({colors : [ "yellow" , "orange" ]})db.students.find({'address.state' : 'CA'}).count();
Example Queries with MongoDB Brown Bag Presentations Schema-less Databases By Zack Schwartz

Some problems are easier to solve conceptually
Faster on reads, slower on reads.
Handles big data exceptionally well
Metatext project had over 300 million tweets by the end
Ad Campaign system had 10 billion tweets.
All the standard features you'd expect
Nifty features depending on driver used, can store and create objects on the fly.
date -> datetime.datetime(2011, 6, 8)
Stores object declaration directly in document
On query, provides object.
Advantages to NoSQL Brown Bag Presentations Schema-less Databases By Zack Schwartz

Relatively new, less support, community out there
Currently there is no framework that integrates the MVC model with NoSQL
There is research on this.
Does not respond to SQL queries--therefore cannot be used with SQL based reporting tools
Might be too flexible for some cases
No foreign key restriction
Disadvantages to NoSQL Brown Bag Presentations Schema-less Databases By Zack Schwartz

NoSQL is great for high volume, high performance, big data solutions.
Scales 'horizontally'
Works great in the Cloud
NetFlix uses multiple NoSQL databases.
Sometimes easier to understand/program conceptually
Convenient to program forums with Inception-like reply feature (Reddit)
Reddit uses Cassandra.
Ad Campaign Management system
Implementations in most major programming languages including C#.
Conclusion Brown Bag Presentations Schema-less Databases By Zack Schwartz

Thank You [email_address] 1629 K St NW, STE 300, Washington, DC 20006 Phone (202) 478-9620 Fax (888) 647-6110 web: www.vofficeware.com

vOfficeware Brown Bag - NOSQL

by apexdodge on Jul 07, 2011

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vOfficeware Brown Bag - NOSQL — Presentation Transcript