Slides of my presentation about serverless database processing using Azure Functions and Cosmos DB at SQL Server User Group Croatia weekly community meeting

1. Cosmos DB + Azure Functions: A
serverless database processing
Luis Beltrán

2. luis@luisbeltran.mx
@darkicebeam
Luis Beltrán

3. Agenda
• Azure Cosmos DB
• Azure Functions
• Integration
• Demo
• Call to Action

4. Azure Cosmos DB
A globally-accessible NoSQL database service for modern application development

5. Column-family
Document
Graph
Turnkey global distribution
Elastic scale out
of storage & throughput
Guaranteed low latency at the 99th percentile
Comprehensive SLAs
Five well-defined consistency models
Table API
Key-value
A globally distributed, massively scalable, multi-model database service
Cosmos DB’s API for
MongoDB
Azure Cosmos DB

6. Elastically Scale Storage and Throughput
Independently and elastically scale
storage and throughput across
regions – even during unpredictable
traffic bursts – with a database that
adapts to your app’s needs.
• Elastically scale throughput from 10
to 100s of millions of requests/sec
across multiple regions
• Scale throughput automatically
using autopilot mode
• Only pay for the throughput and
storage you need

7. Guaranteed Low Latency
Provide users around the world
with fast access to data
• Serve single digit millisecond
reads and writes
• Guarantee that reads and writes
of documents 1 KB or smaller will
be < 10 ms at the 99% percentile

8. Turnkey Global Distribution
Put your data where your users are in
minutes
Automatically replicate all your data
around the world, and across more
regions than Amazon and Google
combined.
• Available in all Azure regions
• Manual and automatic failover
• Automatic & synchronous multi-region
replication
• Configure multiple write regions to
further reduce latency and increase
availability

9. Five Well-Defined Consistency Models
Choose the best consistency model for your app
• Offers five consistency models
• Provides control over performance-consistency tradeoffs, backed by
comprehensive SLAs.
• An intuitive programming model offering low latency and high availability for
your planet-scale app.

10. Multiple Data Models and APIs
Use the model that fits your requirements, and the apis, tools, and
frameworks you prefer
• Cosmos DB offers a multitude of APIs to access and query data including, SQL,
various popular OSS APIs, and native support for NoSQL workloads.
• Use key-value, columnar, graph, and document data
• Data is automatically indexed, with no schema or secondary indexes required
• Blazing fast queries with no lag

11. Scenario I
Optimization of IoT and Big
Data operations in
subsidiaries:
• Remote well monitoring
• Collecting performance data
• Profitable
• Device management
• Data transmission
• Analysis automation

12. Scenario II
Delivering high-quality,
scalable experiences:
• A database that seamlessly
responds to massive
performance demands
• Low latency multiplayer
game
• Instant scalability
• Uninterrupted user
experience globally

13. Azure Functions
Process events with serverless code

14. PaaS
IaaS
On-premises Serverless
How do I architect my app?
Serverless, the cloud native platform
The evolution of application platforms

15. What is Serverless?
Event-driven / instant-scale Micro-billing
Abstraction of servers
Manage apps, not servers Faster time to market
Reduced DevOps

16. Serverless application platform components
Development Platform

17. Azure Functions
Code Data + Events
Azure Functions

18. Your code runs when a
(previously-specified)
event occurs
Triggers
Blob Storage
Cosmos DB
Event Hub
HTTP
Queues
Service Bus
Timer
Webhook
Photo taken and sent
Upload it to
blob storage
Produce scalated images
Bindings
File
Table
Excel
OneDrive
Email
Mobile app
Notification
…

19. Use Bindings in Your Code
public static void Run(byte[] image, string filename,
Stream outputBlob, TraceWriter log)
{
log.Info($"Processing image: {filename}");
var imageBuilder = ImageResizer.ImageBuilder.Current;
imageBuilder.Build(
image, outputBlob,
new ResizeSettings(640, 400, FitMode.Max, null), false);
}
{
"bindings": [
{
"name": "image",
"type": "blobTrigger",
"direction": "in",
"path": "card-input/{filename}.jpg",
"connection": "AzureWebJobsStorage"
},
{
"type": "blob",
"name": "outputBlob",
"path": "card-output/{filename}.jpg",
"connection": "AzureWebJobsStorage",
"direction": "out"
}
]
}

20. Integration
Azure Functions + Azure Cosmos DB

21. Serverless database computing using Azure
Cosmos DB and Azure Functions
• With the native integration between Azure Cosmos DB and Azure
Functions, you can create database triggers, input bindings, and
output bindings directly from your Azure Cosmos DB account.
• Using Azure Functions and Azure Cosmos DB, you can create and
deploy event-driven serverless apps with low-latency access to rich
data for a global user base.
• Azure Cosmos DB and Azure Functions enable you to integrate your
databases and serverless apps in three ways.

22. Cosmos DB Trigger
Create an event-driven Azure Functions trigger for Cosmos DB. This
trigger relies on change feed streams to monitor your Azure Cosmos
container for changes.
When any changes are made to a container, the change feed stream is
sent to the trigger, which invokes the Azure Function.

23. Cosmos DB Input Binding
Alternatively, you can bind an Azure Function to an Azure Cosmos
container using an input binding.
Input bindings read data from a container when a function executes.

24. Cosmos DB Output Binding
The third option is to bind a function to an Azure Cosmos container
using an output binding.
Output bindings write data to a container when a function completes.

25. Demo
Creating a serverless Cosmos DB API

26. Get Data

27. Insert Data

28. Update Data

29. Delete Data

30. Call to Action
Learn more…

31. Serverless database computing con Azure Cosmos DB y Azure Functions
https://docs.microsoft.com/en-us/azure/cosmos-db/serverless-
computing-database
Azure Cosmos DB and Azure Functions integration
https://youtu.be/L88quzuyjDY

32. Q & A

33. Thank you for your attention
Luis Beltrán
Tomás Bata University in Zlín
Tecnológico Nacional de México en Celaya
About Me:
https://about.me/luis-beltran