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THE SHARP EDGES OF LEAKY ABSTRACTIONS MARK ALLEN – ALERT LOGIC MRALLEN1@YAHOO.COM @BYTEMEORG

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“Every man shares a secret pain. Share it with me and gain strength from the sharing” -Sybok, Star Trek V

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ABSTRACTION •Introduce levers •Encapsulate behaviors or domains •Remove complexity from problems

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ABSTRACTIONS AS A SERVICE •TensorFlow •Amazon •Azure

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ON PREMISE ABSTRACTIONS •Search (e.g., Elastic or Solr) •“Big Data” (e.g., Spark or Hadoop or $APACHE_PROJECT)

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THE PITCH You don't need to know or understand these messy details about the abstraction you're using. The system accounts for all the things, so relax; write your system as you would expect to.

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“It’ll be fine.”

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LOOK AT ALL THIS FREE STUFF! • three different programming languages (!!), • automatic work division, • job retry on failure, • automatic collation of output from worker nodes, • job scheduling (with your own pluggable scheduler, even!) and • a reasonably nice web UI to track jobs and progress. It will even draw a DAG of the work elements!

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The computer is not your friend

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“I COME TO BURY CAESAR, NOT TO PRAISE HIM.” - ANTONY, JULIUS CAESAR, ACT 3, SCENE II

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Obligatory cat picture

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Spolsky’s Law of Software Abstractions: All non-trivial abstractions, to some degree, are leaky.

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What are we to do?

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What causes leaky abstractions?

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Abstracting the “wrong” thing

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Abstracting something that can’t be abstracted

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Leaky by design

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Let us be honest with one another

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Tutorials and documentation help

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Give thought to how people might use your abstraction

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Give thought to how people might operate your abstraction

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Thank you

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REFERENCES • https://hackernoon.com/leaky-by-design-7b423142ece0 • https://www.joelonsoftware.com/2002/11/11/the-law-of-leaky-abstractions/ • https://hackernoon.com/what-really-happened-with-vista-4ca7ffb5a1a • http://www.mayofamily.com/RLM/txt_Clarke_Superiority.html