Lynn Langit

MongoDB for the SQL Server Pro

Feb 2013 – For MongoDB LA

What is MongoDB?

• Open source NoSQL database• Document-oriented • Stores JSON-like documents (dynamic schemas)• Includes a strong query language (javascript)• Powerful, flexible indexing (including geospatial)• Sharding and replication• Cross-Platform (many drivers )

QUICKSTART - SETUP MONGODB Demo

Get MongoDB and Driver(s)• Quick download, zero install• Also get your driver (C# for us)

Starting up MongoDB

Using the Console

Using MongoVue

Connecting with MongoVue

Using MongoVue

COMPARING DOCUMENT DATABASES TO RDBMS SYSTEMS

Understanding more..

So which type of NoSQL? CAP…

ConsistencyAvailability

PartitionTolerance

CP = noSQL/columnHadoopBig TableH-baseMemCacheDB(graph)?

CA = SQL/RDBMSSQL Sever / SQL AzureOracleMySQL

AP = noSQL/document or key/valueMongoDBDynamoDBCouchDBCassandraVoldemort

DB Features for MongoDB & SQL Server

primary keys and indexes

queries with models for

sorting / limiting results

a strong typing system

aggregations like SUM(),

COUNT(), etc…

Large object support

DB Features unique to Document DBsCollections, not Tables

Query language, not T-SQL

Idrefs, not Joins

No pre-defined Schema

• Aggregation Framework• Grouping or MapReduce

Aggregations

• No multi-document transactions

No Transactions

No Full-text search

Use 10gen Quick Reference Cards

DB Features of note in MongoDB• BSON supports more complex types (date, geo-spatial, etc…)• Supports dynamic queries via proprietary query language

– Uses “find()” which returns a [lazy] cursor– Multi-key indexes can be created

• Scalability via Replication and Sharding

Why use MongoDB?

• Document-like• Semi-structured• Few Joins• Geospatial

Data Structure

• Large or Huge• Distributed• Unpredictable

Data Volume

MongoDB Scenarios

Document Management

systems

E-commerce (catalog portion

only)

Archiving / event logging

Real time analytics (based

on logging)Gaming Geospatial

Mobile

IMPORTING DATA TO MONGODBDemo

Adding Data

• Data must be in JSON format - converter• “Insert” CREATES a collection if needed

Importing data…using MongoVue

Viewing Collection Data

USING VELOCITY FOR MODELINGDemo

Modeling

Use short names • each name is saved for

each document• can save up to 30%

storage

Keep collections small• Can create non-

default (narrower) key• Document size

maximum is 4 MB

Use GridFS for BLOBs

Com

parin

g…

QUERY MONGODB DATADemo

Using FindFind, Fields, Sort, Count, Skip, Limit, Visualize or Export

Data Visualization

Queries

Queries 2 …

Queries 3…

What is Grouping?

• Similar to T-SQL ‘Group By’• Written in javascript

What about Joins?

No traditional

joins in MongoDB

Can use Arrays

Can use Embedded Documents

Can use DBRef

Can De-normalize schema

About the Aggregation Framework• New in MongoDB 2.2• Layer on top to facilitate easier query-writing

Query Tuning

• Use best indexes– Evaluate use of _id– Add columns to index (specificity)– Multiple columns, most specific first– Can use fully covered indexing (indexOnly:true)– Test to make sure indexes are being used

• Qty scanned s/b same as QTY returned• Use .explain

Understanding Explain

• Query execution detail plan• Review number of scanned objects

ADD INDEXES TO MONGODBUnderstanding more

Modifying Data

Update• alone does a replace

Update w/ $set • does an update

Update w/ $inc • increments

Upserts • must be enabled• then insert if new,

update if existing

Multiple field updates • occur by default

Using Update

USING GRIDFSUnderstanding more…

What is GridFS?

• Used to hold objects larger than 16 MB

CONNECTING TO MONGODB WITH C#Demo

Programming against MongoDB

More Information

• MongoDB– http://www.mongodb.org

• 10gen– http://www.10gen.com/contact– info@10gen.com

• YouTube videos (from Lynn Langit)– MongoDB Playlist - https://

www.youtube.com/playlist?list=PLCE5902FB1D284880&feature=view_all

• MongoDB LA UG - http://www.meetup.com/Los-Angeles-MongoDB-User-Group

The Changing Data Landscape

NoSQLRDBMS

OtherServices

www.TeachingKidsProgramming.org• Free Courseware ( • Do a Recipe Teach a Kid (Ages 10 ++)• Java or Microsoft SmallBasic

• recipes)

Toward Data Craftsmanship…

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Hire me• To help build your BI/Big Data solution• To teach your team next gen BI• To learn more about using NoSQL

solutions