This video was recorded at Code Mesh LDN 18 http://bit.ly/2P7SPII Get involved in Code Sync's next conference http://bit.ly/2Mcm4aS --- EVERYTHING ABOUT DISTRIBUTED SYSTEMS IS TERRIBLE by Hillel Wayne THIS TALK IN THREE WORDS: TLA+ Formal Specification TALK LEVEL: Intermediate ABSTRACT Distributed systems are hard. How do you test your system when it's spread across three services and four languages? Unit testing and type systems only take us so far. At some point we need new tools. Enter TLA+. TLA+ is a specification language that describes your system and the properties you want. This makes it a fantastic complement to testing: not only can you check your code, you can check your design, too! TLA+ is especially effective for testing concurrency problems, like crashes, race conditions, and dropped messages. This talk will introduce the ideas behind TLA+ and how it works, with a focus on practical examples. We'll also show how it caught complex bugs in our systems, as well as how you can start applying it to your own work. Read the full abstract: http://codesync.global/speaker/hillel-wayne/ --- THE SPEAKER - HILLEL WAYNE Coder, chocolatier, cjuggler Hillel is a software consultant in Chicago who specialises in formal specification. He is the author of Learn TLA+ (learntla.com), currently writing Practical TLA+ (Apress, est 2018), and on the Alloy Adoption and Outreach working group. In his free time he juggles and makes candy. More on Hillel Wayne: http://codesync.global/speaker/hillel-wayne/ --- CODE SYNC & CODE MESH LDN 18 Code Mesh LDN is powered by Code Sync. Code Mesh LDN 18 was sponsored by WhatsApp, Toyota Connected, Erlang Solutions, TEAMango, and aeternity. CODE SYNC Website: www.codesync.global Twitter: www.twitter.com/CodeMeshIO Facebook: https://www.facebook.com/CodeSyncGlobal LinkedIn: https://www.linkedin.com/company/code-sync/ Mail: info at codesync.global #CodeMesh #HillelWayne #TLA+ #FormalSpecification #DistributedSystems