Accra MongoDB User Group

Meeting held on 10th November 2012Presented by Yusuf Hamza(Founder and Co-Organizer)

What is MongoDB?

- Database Management System

-Open Source

-Document Oriented

-Schema less

-Scalability

-Agility

-Rich Text Query

A Brief on 10gen

Founders-Dwight Merriman: former DoubleClick Founder and CTO

-Eliot Horowitz: former DoubleClick engineer and ShopWiki Founder and CTO

Dwight + Eliot =experiences building large scale, high availability, robust systems.

Management

-Dwight Merriman, CEO & Co-FounderTwitter: http://twitter.com/dmerr blog: http://dmerr.tumblr.com/

-Max Schireson, PresidentTwitter: http://twitter.com/mschireson blog: http://maxmschireson.com/

Eliot Horowitz, CTO & Co-FounderTwitter: http://twitter.com/elliothorowitz blog: http://elliothorowitz.com/

Offices

-New York City (New York)

-Palo Alto (Carlifornia)

-Reston (Virginia)

-London(Great Britain)

-Dublin(Ireland)

-Barcelona(Spain)

-Sydney( Australia)

Investors

-Flybridge Capital Partners: www.flybridge.com

-Sequoia Capital: http://www.sequoiacap.com/us/technology

-Union Square Ventures: http:// www.usv.com/

-New Enterprise Associate, Inc. (NEA): http:// www.nea.com/

Customer Portofolio : USA-Buddy Media -Prizee -Wordnik-Cisco -Rangespan - Zuberance -Craiglist -Server Density-CustomLink -Shopcade-Disney -Shurterfly-Forbes -Smartling-Foursquare -Sruq-Intuit - The Guardian-Mtv Networks -Tracckr

Why Join MongoDB User Group?

-Stimulate your intelligence

-Job Trends

-New way of dealing with Data

-Meet the demands of the future

- Learn and Share ideas in a relaxed and free session

- Get solutions to your database problems

- Collaborate to undertake new projects

- Any issue worth pursuing.

Cloud and Hosting Partners:

-Amazon Web Services

-Engine Yard

-Joyent

-Windows Azure

-MongoHQ

-MongoLab

-Rackspace Hosting

-RedHat

-VMWare

- Enovance

Use Cases:

- Operational Intelligence

- Content Management

- Product Data Management

- High Volume Data Feeds

- User Profile Management

- Hadoop.

Basic MongoDB Operations

• http://www.10gen.com/static/downloads/mongodb_qrc_queries.pdf

Queries and what they match

MongoDB Commands

• http://www.10gen.com/static/downloads/mongodb_qrc_commands.pdf

The rise of NoSQL and why MongoDB is leading the pack.

Credit:Matthew Asslet

MongoDB accounts for 43% of all mention of NoSQL technologies in linked in Profiles.

Credit: Mathew Asslet

MongoDB 2.2. what’s new?

Concurrency

• DB level Locking -Replication not impeded by other operations -Can be spited into Dbs

• Yielding with Disk Acess - Finish making sure no disk acess in a lock - can measure globally and per db if it happens - Can measure faults per db

Aggregation Framework

Map Reduce = complicated (javascrip codes) and not too awesome

MongoDB 2.2 Proves a simpler and more awesome approach e.g Simple JSON Aggegation db.post.aggregate( { $unwind : “$tags” , { $group : { id : “$tags” , total : { $sum : 1 } } } )

TTL Collections

• Currently works with dates

• Db.sessions.ensureindex({ lastupdated : 1 } , { expiresAfterSeconds :

86400 } ) ;

• Background Job deleting entries

• Storage engines configured for no fragmentation

Fragmentation

Reasons why it’s a problem

Storage engine free list stored by a power of 2

- Non heterogeneous sized data can fragment

-Always allocate power of 2

- db.carts.runCommand(

- “collmod” ,

-{ usePowerOf2sizes : true } )

Benefit: Consistency in performance

Setback: Unused disk spaces(Expensive)

Data Center Awareness

• Tagging for sharding• Can tag shard –A, B,C• Can define tag ranges - 0 -100 > A - 100-200 > B - ……

Use Cases• Geo Collocating Data

• Isolating Collections/data to specific shards/regions/types

• Non heterogeneous hardware

• Multi tenancy

A simple Applicationsusing MongoDB

Developing an application to find nearby restaurant serving ‘Fufu ‘Using MongoDB as datasore.

“Fufu” is a favorite delicacy in Ghana

• Geolocation Primer: Mehods to determine location

• Detecting the location of a web visitor: The W3C geolocation API

• Browsers support for the API

• The Geolocation object: getCurrentPosition() method

• Drawing map using the Google Maps API

• Geospational Indexes: creating geospatial indexe

• Performing location queries:finding restaurants near you using geoNear()

Command and bounded queries

• Geospatial Haystack Indexing: finding restaurants near you serving “fufu”

Free online courses from 10gen Education

10gen Education

• An online learning platform run by 10gen (the MongoDB company) available to anyone in the world with an internet connection.

• free courses will teach you how to develop for and administer MongoDB quickly and efficiently.

• Frequent assessments help you verify your understanding, and at the end of a course, you'll receive a certificate of completion from 10gen.

• You'll also become a member of 10gen's community of cutting-edge NoSQL technologists.

• Over time, 10gen will be adding classes on schema design, advanced scaling and replication, and other topics, so check back often!

• 10gen's education platform was developed under a collaboration with edX, the not-for-profit consortium between MIT, Harvard and Berkeley.

Courses

For your information

+ on

Red Planet(Mars)On 5th August 2012

Thank You Very Much

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@AccraMongoDB