Amazon DynamoDB Accelerator (DAX) is a fully managed, highly available, in-memory cache for DynamoDB that delivers up to a 10x performance improvement – from milliseconds to microseconds – even at millions of requests per second. DAX does all the heavy lifting required to add in-memory acceleration to your DynamoDB tables, without requiring developers to manage cache invalidation, data population, or cluster management.

1. © 2017, Amazon Web Services, Inc. or its Affiliates. All rights reserved
Amazon DynamoDB Accelerator (DAX)
Sean Shriver
NoSQL Solutions Architect
Amazon Web Services

2. Amazon DynamoDB
Fast and flexible NoSQL database
service for any scale

3. Scaling high-velocity use cases with DynamoDB
Ad Tech Gaming MobileIoT Web

4. Scalability Performance Security Availability Manageability Developer
Platform

5. Performance
Scalability Performance Security Availability & Data Protection Manageability Development Platform

6. DynamoDB: consistent performance at scale
ConsistentSingle-Digit Millisecond Latency
Requests(millions)
Latency(milliseconds)
Scalability Performance Security Availability & Data Protection Manageability Development Platform
“We cannot afford to waste a 3 or 4 milliseconds...”
“We have 20ms to make a decision… ”

7. Scalability Performance Security Availability & Data Protection Manageability Development Platform

8. Scalability Performance Security Availability & Data Protection Manageability Development Platform

9. Scalability Performance Security Availability & Data Protection Manageability Development Platform
DynamoDB
Cache
Your Applications
Traditional side cache
DynamoDB
Your Applications
Caching made simple
DynamoDB Accelerator

10. DAX Demo

11. Scalability Performance Security Availability & Data Protection Manageability Development Platform
Milliseconds to
microseconds

12. Scalability Performance Security Availability & Data Protection Manageability Development Platform
• Fully managed, highly available: handles all software management,
fault tolerant, replication across multi-AZs within a region
• DynamoDB API compatible: seamlessly caches DynamoDB API calls,
no application re-writes required
• Write-through: DAX handles caching for writes
• Flexible: Configure DAX for one table or many
• Scalable: scales-out to any workload with up to 10 read replicas
• Manageability: fully integrated AWS service: Amazon CloudWatch,
Tagging for DynamoDB, AWS Console
• Security: Amazon VPC, AWS IAM, AWS CloudTrail, AWS
Organizations
Features
DynamoDB Accelerator (DAX)
DynamoDB
Your Applications
DynamoDB Accelerator

13. What did we just do?
Scalability Performance Security Availability & Data Protection Manageability Development Platform
AWS VPC
EC2
App
DDB
SDK
DynamoDB
DAX
SDK
DAX

14. Fully managed, highly available

15. High Availability
Scalability Performance Security Availability & Data Protection Manageability Development Platform
AMAZON VPC
EC2
App
DAX
SDK
DynamoDB
AZ1
AZ2
AZ3

16. DynamoDB API compatible

17. Q: How easy is it to add in-
memory caching with DAX?
A: Comment out the this code
and add this code
Scalability Performance Security Availability & Data Protection Manageability Development Platform

18. DAX is API compatible with DynamoDB
• Read APIs: GetItem, BatchGetItem, Query, Scan
• Modify APIs: PutItem, UpdateItem, DeleteItem,
BatchWriteItem
• Control plane APIs: Not supported (CreateTable,
DeleteTable, etc.)
Scalability Performance Security Availability & Data Protection Manageability Development Platform

19. Scalability Performance Security Availability & Data Protection Manageability Development Platform
DAX has two caches
Query Cache {query, scan}
Item Cache {GetItem, PutItem}
key, value
query text, result set

20. Write-through

21. Scalability Performance Security Availability & Data Protection Manageability Development Platform
DynamoDB Accelerator (DAX): Reads
DynamoDB
Your Applications
DynamoDB Accelerator
t=1 GetItem
t=2 Cache Miss
t=3 GetItem
t=4 Populate cache
t=5 Return item

22. Scalability Performance Security Availability & Data Protection Manageability Development Platform
DynamoDB Accelerator (DAX): Reads
DynamoDB
Your Applications
DynamoDB Accelerator
t=1 GetItem
t=2 Cache Hit
t=3 Return item

23. Scalability Performance Security Availability & Data Protection Manageability Development Platform
DynamoDB Accelerator (DAX): Write-through
DynamoDB
Your Applications
DynamoDB Accelerator
t=1 PutItem
t=2 Write
t=3 Populate cache
t=4 Return item

24. Scalability Performance Security Availability & Data Protection Manageability Development Platform
DynamoDB Accelerator (DAX): Read after Write
DynamoDB
Your Applications
DynamoDB Accelerator
t=1 GetItem
t=2 Cache Hit
t=3 Return item

25. Flexible

26. Scalability Performance Security Availability & Data Protection Manageability Development Platform
DynamoDB Accelerator (DAX): Flexible
DynamoDB
Your Application
DynamoDB Accelerator
Table #1
DynamoDB
Your Application
DynamoDB Accelerator
Table #1
Table #2
DynamoDB
Your Applications
DynamoDB Accelerator
Table #1
DynamoDB
Your Applications
DynamoDB Accelerator
Table #1
Table #2
One-to-One One-to-Many Many-to-One Many-to-Many

27. Scalable

28. Scaling DAX
Scale-up
. . .
Scale Up
(15.25 GiB to 244 GiB)
Scale-out
Scale Out
(up to 10 replicas)
. . .
Scalability Performance Security Availability & Data Protection Manageability Development Platform

29. Manageability

30. Scalability Performance Security Availability & Data Protection Manageability Development Platform
Amazon
CloudWatch
AWS Management
Console
Cost-based
Tagging

31. Cache Eviction
Scalability Performance Security Availability & Data Protection Manageability Development Platform
Time-to-live (TTL) Least Recently Used
(LRU)
Write-through
eviction

32. Security

33. VPC subnet IAM
AWS
CloudTrail
Scalability Performance Security Availability & Data Protection Manageability Development Platform

34. Customer scenarios

35. Scalability Performance Security Availability & Data Protection Manageability Development Platform
Customer Use Case #1: Unpredictable spikes

36. Scalability Performance Security Availability & Data Protection Manageability Development Platform
Customer Use Case #2: Speed
Response times in microseconds

37. Scalability Performance Security Availability & Data Protection Manageability Development Platform
Customer Use Case #3: Hot keys
RequestsPerSecond
Item Primary Key
Request Distribution Per Partition Key
DynamoDB Requests Cache Hits

38. Scalability Performance Security Availability & Data Protection Manageability Development Platform
Customer Use Cases
DynamoDB
App
DAX
DynamoDB
App
DynamoDB
App
Write-Through Cache
Read-Through Cache
Write-Back Cache
(not available today)
1 2
34
1 3
42
1
23
DAX
DAX

39. Scalability Performance Security Availability & Data Protection Manageability Development Platform
Repeated users are now being handled by the DAX cache
without making the more expensive (in both latency & cost)
call to DynamoDB
Shahar Kobrinky
VP of Architecture and Scale at Eyeview
“
”
DAX represents a big opportunity for us to
find the optimal balance between infrastructure cost and
system performance
Brandon O’Brien
Principle Software Engineer, Expedia, Inc.
“
”
DynamoDB Accelerator (DAX)

40. Scalability Performance Security Availability & Data Protection Manageability Development Platform
The AWS team has taken a best-practice architectural
pattern and turned it into something repeatable and
valuable for its customers
Glenn Nethercutt
Chief Architect, Genesys
“
”
The ability to supercharge DynamoDB with DAX is
something we're looking forward to
Pat Malatack
General Manager of Twilio Messaging
“
”
DynamoDB Accelerator (DAX)

41. Scalability Performance Security Availability & Data Protection Manageability Development Platform
Key Benefits
• Fast performance: Microseconds response
times at millions of reads/sec from single DAX
cluster
• Ease of use: DynamoDB API compatible -
requires minimal code change for existing
applications, simplifying developer experience
• Lower costs: Reduce provisioned read
capacity for DynamoDB tables for tables with
hot data
DynamoDB Accelerator (DAX)
DynamoDB
Your Applications
DynamoDB Accelerator

42. Learn more
Sign up for the DAX Preview
https://goo.gl/txHZmQ
Google ”DAX preview form”

43. © 2017, Amazon Web Services, Inc. or its Affiliates. All rights reserved
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