Caching in AWS Lambda

You want to optimize your performance in your AWS Lambda functions and reduce infrastructure costs by avoiding expensive API calls? You should think about caching data in your function! In this talk, I'll show you three different options how to cache data in Lambda: simple caching, custom caching and managed caching.

Transcript

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2. Available options to cache data in AWS Lambda and how to use them.
   CACHING IN AWS LAMBDA
   

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3. We´re
   

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4. Quick recap what AWS Lambda is and how it looks like.
   AWS LAMBDA
   

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5. SIMPLE AWS LAMBDA FUNCTION: NODEJS
   

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6. SIMPLE AWS LAMBDA FUNCTION: JAVA
   

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7. DEPLOYMENT PROCESS
   Lambda
   Function
   Lambda
   Function
   >
   Code Artifact
   AWS Lambda
   

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8. REASONS FOR CACHING
   

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9. 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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10. PAY FOR WHAT
    YOU USE
    

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11. LAMBDA SCALING
    GET Name for X
    GET Name for X
    GET Name for X
    GET Name for X
    DynamoDB
    

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12. TYPICAL CACHING SETUP
    CACHE
    Your app
    DynamoDB
    

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13. "Tha)'s e-./. I've 3456 t8a9 - h:;9=m6.."
    You
    —
    

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14. START CODING?!
    

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15. INFRASTRUCTURE UNCERTAINTIES
    Functions are only instantiated when needed.
    Functions might be shut down at any time.
    

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16. 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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17. Understanding the process how a Lambda function is called.
    LAMBDA EXECUTION PROCESS
    

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18. 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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19. Called by AWS Lambda
    LAMBDA EXECUTION PROCESS
    

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20. LAMBDA EXECUTION PROCESS
    1.) Only executed at cold start
    2.) Executed each time
    

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21. Cache data without using a caching service or library.
    SIMPLE CACHING
    

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22. SIMPLE CACHING
    

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23. SIMPLE CACHING
    

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24. SIMPLE CACHING
    

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25. SIMPLE CACHING
    

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26. SIMILAR IN JAVA
    Field initialization, constructor, etc.
    

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27. PRO TIP
    TIME FOR INITIALIZATION
    IS NOT CHARGED
    BY AWS.
    

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28. PRO TIP
    

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29. PRO TIP
    

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30. PRO TIP
    

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31. PRO TIP
    

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32. PRO TIP
    

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33. SIMPLE CACHING
    

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34. AFTER
    No data synchronization between
    instances of your Lambda functions.
    BEFORE
    Low cost caching without performance
    overhead.
    

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35. Use a bullet-proof caching library and host it by yourself.
    CUSTOM CACHING SERVICE
    

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36. CUSTOM CACHING SETUP
    1.) GET Name for X
    CACHE
    2.) GET Name for X
    3.) SET Name for X
    DynamoDB
    

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37. "Whe; /4: la@;Ah B; EC2 in.9-nH6
    Iit84:9 sJeA=fLM5g a .@On6), it's
    a@)QRat=HBSlL Sa@nHT6d i;94 B deV-:St
    .uOnX) M5 yo@[ <6fa@\9 V^_."
    https://docs.aws.amazon.com/vpc/latest/userguide/default-vpc.html
    —
    

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38. "By 3ea-:l), re.4:bce. I=t8M5 a V^_ -r6 ;o9
    -cH6dsieSX f[QR wi)T=n B LahOd- V:5c)i45"
    https://docs.aws.amazon.com/lambda/latest/dg/vpc.html
    —
    

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39. LAMBDA IN VPC
    ACCESS POSSIBLE, BUT
    LONGER STARTUP TIMES.
    

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40. 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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41. CUSTOM CACHING SETUP
    VPC
    Lambda Subnet Cache Subnet
    Public Subnet
    

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42. Demo
    

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43. Use a managed caching service instead of maintaining your own.
    MANAGED CACHING SERVICES
    

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44. AWS ELASTICACHE
    REDIS + MEMCACHED
    

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45. 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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46. SIMILAR SETUP
    LIKE CUSTOM
    CACHING
    

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47. Demo
    

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48. 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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49. NEW MEETUP SERIES: K15T TEAM TALKS
    TOPIC: GIT TOGETHER
    More information:
    https://www.meetup.com/de-DE/K15tTeamTalks/events/256232999/
    

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