Distributed Domain Destruction - Adventures in building distributed systems

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DDD ADVENTURES IN BUILDING DISTRIBUTED SYSTEMS 1 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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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, PHP-Usergroup Frankfurt Am Main

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WARNING 3 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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DDD 4 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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DISTRIBUTED 5 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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DOMAIN 6 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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DESTRUCTION 7 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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WHAT IS A DISTRIBUTED SYSTEM? 8 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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THE SIMPLE DEFINITON It is a system where you can distribute processing of costly 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, PHP-Usergroup Frankfurt Am Main

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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, PHP-Usergroup Frankfurt Am Main

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CONGRATULATIONS 15 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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FINITE EXPANSE OF THE UNOPENING WALLET 16 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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DAEMONS... DAEMONS EVERYWHERE 19 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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SUPERVISOR UPSTART 20 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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LOG AND COUNT EVERYTHING 22 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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AGGREGATE AND SEE 23 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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STATSD 25 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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...BECAUSE LOGS AND COUNTERS ARE LYING TO YOU 26 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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WHAT HAPPENED TO 40 MILLION RECORDS, WHERE HAVE THEY GONE? 27 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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WHAT IS DYNAMODB? 28 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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TEMPORAL TABLES YOU SAY? 29 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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ARE WE WRITING DATA TO THE DYNAMODB? 30 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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THE LOGS ARE CLEAN, THE METRICS ARE GREEN 31 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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NO EXCEPTIONS? 32 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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WHAT THE HELL DID I JUST READ? 34 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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I CAN HAZ ERROR HANDLING NAO? LOL NO 35 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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THIS WORKER IS FAST, THAT WORKER IS SLOW, WHICH ONE WILL CRASH THE DATABASE, NOBODY KNOWS 37 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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TIMING IS EVERYTHING!111 38 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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BATCH PROCESSING 41 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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ABRAKAPOCUS, YOUR DISK SPACE IS GONE 43 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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0 BYTES FREE 44 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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MAKE THIS APP GREAT AGAIN AND GET THE CLIENT TO PAY FOR IT 45 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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WARNING: INDEX OUT OF BOUNDS 47 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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BUT WHY ISN'T THERE A SEPARATE LOG PARTITION? 48 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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10X 49 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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LIVE, AND LEARN, AND DOCUMENT... 50 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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WHAT DO YOU MEAN WE CAN'T SCALE? 51 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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LOCAL... YOU KEEP USING THAT WORD... 52 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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MEMORY REMEMBER TO USE IT 53 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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THERE IS AN S IN SUCCESS 54 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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BROWSER BUG REPRODUCTION 56 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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CURL REQUEST 57 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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OUTPUT THE LAST REQUEST/RESPONSE 58 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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WTF????? 59 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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18 HOURS TO LOCATE, 20 SECONDS TO FIX 62 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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CRATES, BROWSERS AND DATABASES 63 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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16 CPUS 122 GB OF RAM 64 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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BARCODE SCANNERS AND KEYBOARDS DO NOT MIX 66 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main

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THANK YOU! SRDJAN VRANAC // [email protected] // @VRANAC 68 — Srdjan Vranac, Code4Hire, PHP-Usergroup Frankfurt Am Main