WE DON’T NEED NO STINKING SERVERS
IMAGE RESIZING WITH AWS LAMBDA
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The Problem:
For the last 6 years, users have been able to upload
any image they like for use in a VizZle lesson
10144 × 8054 pixels
32.6 MB
980 DPI
minutes to download
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And the app would never show it at that resolution!
Max Page Size: 1920 x 1080
414x329
915x686
944x708
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Or the old app
Flash “Card” Size: 520 x 390
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The Solution:
Batch convert all the images!
Max Image
Size
960x540
680x540
$ convert 1416855261.78270 -size x540
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“How many images are there anyway?”
–Hey Blinken
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“Are you going to download every one from the
internet?”
–Al Gore
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“What are we going to do with new uploads?”
–Johnny Five
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“Who is going to maintain that EC2 instance?”
–Jeff Bezos
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Or any binary compiled on Amazon Linux!
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Read/Write S3
Role Type: AWS Lambda
Attach Policy: AWSLambdaExecute
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Lambda Interface
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Deployment
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Configuration
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Testing
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Testing
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Testing
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Image Resizing Gotchas
Maintain Aspect Ratios
Lossy vs Lossless
Lossy vs Headless
Lambda Inception
ACLs
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Image Resizing Gotchas
Maintain Aspect Ratios
Lossy vs Lossless
Lossy vs Headless
Lambda Inception
ACLs
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Lambda Gotchas
Function runtime is limited to 5 minutes
Maximum of 1.5GB memory
Debugging involves waiting for CloudWatch logs
to show up