Distributed Domain Destruction - Adventures in building distributed systems

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DDD ADVENTURES IN BUILDING DISTRIBUTED SYSTEMS 1 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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business owner, developer, consultant, mercenary, writing terrible code that performs exceptionally, wrangling elePHPants and Pythons, obsessed with process automation, interested in continuous integration and delivery, clean code, testing, best practices and distributed systems 2 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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WARNING 3 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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DDD 4 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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DISTRIBUTED 5 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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DOMAIN 6 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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DESTRUCTION 7 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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WHAT IS A DISTRIBUTED SYSTEM? 8 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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THE SIMPLE DEFINITON It is a system where you can distribute processing of tasks to other workers. By costly taks I mean anything ranging to heavy computation and cpu utilization to long running processes. If we are talking in the context of web applications, basically anything that can't be done within a request is a candidate for distribution/background processing. 9 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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A MORE REALISTIC DEFINITION A distributed system is one in which the failure of a computer you didn't even know existed can render your own computer unusable. — Leslie B. Lamport, 1987 10 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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11 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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12 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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13 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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14 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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CONGRATULATIONS 15 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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FINITE EXPANSE OF THE UNOPENING WALLET 16 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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17 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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18 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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DAEMONS... DAEMONS EVERYWHERE 19 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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SUPERVISOR UPSTART 20 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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21 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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LOG AND COUNT EVERYTHING 22 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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AGGREGATE AND SEE 23 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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24 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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STATSD 25 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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...BECAUSE LOGS AND COUNTERS ARE LYING TO YOU 26 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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WHAT HAPPENED TO 40 MILLION RECORDS, WHERE HAVE THEY GONE? 27 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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WHAT IS DYNAMODB? 28 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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TEMPORAL TABLES YOU SAY? 29 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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ARE WE WRITING DATA TO THE DYNAMODB? 30 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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THE LOGS ARE CLEAN, THE METRICS ARE GREEN 31 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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NO EXCEPTIONS? 32 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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33 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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WHAT THE HELL DID I JUST READ? 34 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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I CAN HAZ ERROR HANDLING NAO? LOL NO 35 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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36 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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THIS WORKER IS FAST, THAT WORKER IS SLOW, WHICH ONE WILL CRASH THE DATABASE, NOBODY KNOWS 37 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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TIMING IS EVERYTHING!111 38 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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39 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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40 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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BATCH PROCESSING 41 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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42 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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ABRAKAPOCUS, YOUR DISK SPACE IS GONE 43 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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0 BYTES FREE 44 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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MAKE THIS APP GREAT AGAIN AND GET THE CLIENT TO PAY FOR IT 45 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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46 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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WARNING: INDEX OUT OF BOUNDS 47 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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BUT WHY ISN'T THERE A SEPARATE LOG PARTITION? 48 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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10X 49 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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LIVE, AND LEARN, AND DOCUMENT... 50 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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THERE IS AN S IN SUCCESS 51 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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52 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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BROWSER BUG REPRODUCTION 53 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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CURL REQUEST 54 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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OUTPUT THE LAST REQUEST/RESPONSE 55 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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WTF????? 56 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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57 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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58 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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18 HOURS TO LOCATE, 20 SECONDS TO FIX 59 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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CRATES, BROWSERS AND DATABASES 60 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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16 CPUS 122 GB OF RAM 61 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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62 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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BARCODE SCANNERS AND KEYBOARDS DO NOT MIX 63 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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64 — Srdjan Vranac, Code4Hire, WebcampZg 2016

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THANK YOU! SRDJAN VRANAC // [email protected] // @VRANAC HTTPS://JOIND.IN/TALK/17558 65 — Srdjan Vranac, Code4Hire, WebcampZg 2016