mongodb on azure

1.866.iQmetrixwww.iQmetrix.com

MongoDB on Azure

Agenda• Me / iQmetrix• Architecture• NoSQL databases• MongoDB• 10gen• Running MongoDB in Azure• History, Issues• MMS [if we have time]


John Woakes

• I work for iQmetrix as a Lead Developer• Started as Cobol programmer• Oracle Developer/DBA• SQL Server and .NET• [email protected]• This is my first presentation – be gentle.

mailto:[email protected]


iQmetrix

• Started in Regina 1999-ish• Vancouver, Winnipeg and Charlotte• Creating Software for the mobile retail

industry• RQ4 – Retail Management System• XQ – Interactive Retail


Azure Component

• 4 Web Roles – Http API and Console• 3 Worker Roles – MongoDB replica sets• 1 Worker Role – background functions• 1 Azure Queue• Several Service Bus Queues• Blob storage for images/video and backups• Table storage for logs


Clients

• About 1000 devices• 4 Client customer facing applications• Adplay media player• Browse app for detailed product information• Stream app • iPad Browse

• RQ4 updates prices and quantities


NoSQL Databases

• Relatively new• Often open source• Designed to work well in the cloud• Scale out not up• Good for big data• Not a replacement for Relational Databases


NoSQL Databases

• MongoDB - http://www.mongodb.org • CouchDB• RavenDB• BigTable• Cassandra

http://www.mongodb.org/

http://www.mongodb.org/


Users of MongoDB

• CraigsList• FourSquare• EA• GitHub• Disney• MTV• Loggly


Why MongoDB?

What uses the most CPU/IO in Relational Databases?• Transactions• Joins

MongoDB is document based (no joins, no transactions)• Documents can contain sub-documents• Can index sub-documents and arrays


Change the way you think

Important points

• Schema design is very important• There is no schema in MongoDB• Resist Normalization• Uses a memory mapped model• Goes faster with lots of servers and lots of

RAM


10gen

• CEO developed MongoDB• It is open source and is on GitHub – C++• 10gen http://www.10gen.com/ provides

1. Support2. Training inc. online videos3. Conferences worldwide4. Drivers in lots of languages [including .NET]5. Code and documentation inc. Mongo in

Azure

http://www.10gen.com/

http://www.10gen.com/


• Stores data as bson• Console uses JavaScript and json• 3rd party GUI tools• Database runs as an exe or Windows service• Memory mapped so really needs 64bit OS• User group on Google Groups [busy]• C# driver has LINQ support and full

functionality• Sharding for fast access and huge storage

Main Points


• Good for terabytes of data and billions of records

• Replica Sets for high availability [auto failover]

• Sharding spreads queries over multiple servers

• Geospatial data and functions• GridFS for storing large binary data

Main Points cont.


• Microsoft and 10gen worked together to make MongoDB work well in Azure

• Microsoft support and promote MongoDB on Azure

• Microsoft Open Technologies, Inc.• 10gen have code and documentation on

their site to run MongoDB on Azure

Azure


Run mongo on an Azure Virtual Machine• You have to look after the OS and Firewall• You could use Linux or Windows• It is more hands on • If you have a VM already then you can

use that.• Use an Azure Data Drive for persistence

Azure Options


Use an Azure Worker Role to host MongoDB• PaaS so MS looks after OS• Runs on internal IP addresses so no

Firewall concerns• This is what we use and will now describe

Azure Options


Original article that got us goinghttp://captaincodeman.com/2010/05/24/mongodb-azure-clouddrive/10gen’s documentationhttp://www.mongodb.org/display/DOCS/MongoDB+on+Azure+Worker+Roles10gen’s source codehttps://github.com/mongodb/mongo-azure/

Azure Code

http://captaincodeman.com/2010/05/24/mongodb-azure-clouddrive/



http://www.mongodb.org/display/DOCS/MongoDB+on+Azure+Worker+Roles




https://github.com/mongodb/mongo-azure/




Use Worker Roles to run MongoDBNeed Azure SDK 1.7 [June 2012]Use an Azure Cloud Drive to persist the databaseDownload the MongoDB binaries http://www.mongodb.org/downloads [get the 64bit 2008+]In the worker role ServiceConfiguration file add• <ServiceConfiguration osFamily="2"

osVersion="*"• <Role name="MongoWorker"

vmName="MongoDB">

Azure Code

http://www.mongodb.org/downloads

http://www.mongodb.org/downloads


Include the MongoDB binaries you need in the Worker Role project [set to content and Copy Always]• mongod.exe – database engine• mongo.exe – console• mongodump.exe – used to backup data• mongorestore.exe – used to restore data• mongostat.exe – useful for real time stats

Azure Code


Mount a Cloud Drive with Blob storage backingRun the mongod.exe in a Process• Set up command line arguments• Hook up listeners on the std and error

outputs• Start the processOnce the database is running execute the initialize replica set command

Azure Code


Download the C# driver from NuGetOther role instances in the hosted service can talk to the database with this driver.Use role instance host names when setting up the connection string. Host names are zero based and will follow the pattern NAMEx not 1 based and NAME0x as the doc tell you.

Azure Code


• Went to PDC about 2 years ago• Got Mongo running on a single instance• Went into production about 1 year ago• Added replica sets about 6 months ago• 4 week iterations – just moved 2 week

History


• Outages when on one instance• Alpha MongoDB code using replica sets• Azure outage on Service Bus• An unknown outage just this month• Backup data• Make your code resilient as possible• Log everything• Monitor logs and have alerts

Issues


Very cool and useful free service from 10genInstall a Python Agent on a instance that has access to the MongoDB servers.The agent sends stats data to a 10gen serverYou then login to the MMS dashboard website and monitor your databases in real time.http://www.mongodb.org/display/DOCS/MongoDB+Monitoring+Service

MMS

http://www.mongodb.org/display/DOCS/MongoDB+Monitoring+Service



mongodb on azure

Documents

mongodb work

transactionsjoins mongodb

comwhy mongodb

gen http

azure data drive

terabytes of data

comstores data

azuremicrosoft support