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Available options to cache data in AWS Lambda and how to use them.
CACHING IN AWS LAMBDA
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We´re
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Quick recap what AWS Lambda is and how it looks like.
AWS LAMBDA
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SIMPLE AWS LAMBDA FUNCTION: NODEJS
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SIMPLE AWS LAMBDA FUNCTION: JAVA
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DEPLOYMENT PROCESS
Lambda
Function
Lambda
Function
Code Artifact
AWS Lambda
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REASONS FOR CACHING
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BETTER PERFORMANCE
Avoid slow API calls or
computations.
REDUCE COSTS
Avoid calls which cost you
money, e.g. to your database.
REASONS
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PAY FOR WHAT
YOU USE
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LAMBDA SCALING
GET Name for X
GET Name for X
GET Name for X
GET Name for X
DynamoDB
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TYPICAL CACHING SETUP
CACHE
Your app
DynamoDB
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START CODING?!
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INFRASTRUCTURE UNCERTAINTIES
Functions are only instantiated when needed.
Functions might be shut down at any time.
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CUSTOM
Setup a caching instance by
your own.
CACHING OPTIONS
MANAGED
Use a managed caching
service.
SIMPLE
Cache data only inside
Lambda functions.
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Understanding the process how a Lambda function is called.
LAMBDA EXECUTION PROCESS
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LAMBDA EXECUTION PROCESS
Response Time (ms)
0
250
500
750
1000
# Number Of Request
1 2 3 4 5 6 7 8 9 10
Cold start
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Called by AWS Lambda
LAMBDA EXECUTION PROCESS
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LAMBDA EXECUTION PROCESS
1.) Only executed at cold start
2.) Executed each time
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Cache data without using a caching service or library.
SIMPLE CACHING
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SIMPLE CACHING
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SIMPLE CACHING
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SIMPLE CACHING
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SIMPLE CACHING
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SIMILAR IN JAVA
Field initialization, constructor, etc.
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PRO TIP
TIME FOR INITIALIZATION
IS NOT CHARGED
BY AWS.
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PRO TIP
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PRO TIP
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PRO TIP
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PRO TIP
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PRO TIP
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SIMPLE CACHING
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AFTER
No data synchronization between
instances of your Lambda functions.
BEFORE
Low cost caching without performance
overhead.
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Use a bullet-proof caching library and host it by yourself.
CUSTOM CACHING SERVICE
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CUSTOM CACHING SETUP
1.) GET Name for X
CACHE
2.) GET Name for X
3.) SET Name for X
DynamoDB
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https://docs.aws.amazon.com/vpc/latest/userguide/default-vpc.html
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https://docs.aws.amazon.com/lambda/latest/dg/vpc.html
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LAMBDA IN VPC
ACCESS POSSIBLE, BUT
LONGER STARTUP TIMES.
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LAMBDA VPC STARTUP
VPC
Network Hardware Image: https://www.flaticon.com/free-icon/network-interface-card_969356
"A Serverless Journey: AWS Lambda Under the Hood"
https://www.youtube.com/watch?v=QdzV04T_kec&t=2400
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CUSTOM CACHING SETUP
VPC
Lambda Subnet Cache Subnet
Public Subnet
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Demo
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Use a managed caching service instead of maintaining your own.
MANAGED CACHING SERVICES
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AWS ELASTICACHE
REDIS + MEMCACHED
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MAINTENANCE
AWS is regularly taking care
of updates.
ADVANTAGES
COMPATIBILITY
Redis and Memcached well
supported caching solutions.
GET STARTED
Easy setup and ready to go.
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SIMILAR SETUP
LIKE CUSTOM
CACHING
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Demo
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SEBASTIAN HESSE
Software Engineer | www.k15t.com | @seeebiii
CHARLIE IS MY HOMEBOY
CHARLIE IS MY HOMEBOY
K15t Software
Example code @ GitHub:
https://github.com/seeebiii/caching-in-aws-lambda
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NEW MEETUP SERIES: K15T TEAM TALKS
TOPIC: GIT TOGETHER
More information:
https://www.meetup.com/de-DE/K15tTeamTalks/events/256232999/