Write Follows Read : Implementing using Version Vectors

Explains how to achieve Write Follows Read session guarantee (aka client-centric consistency model) effectively using Version Vectors. Apart from this shows why the Implementation is needed, what could be naive implementation which is based on the definition of Write Follows Read and an alternative of using sticky sessions and its downsides. Timeline: --------------- 00:00 - Short Intro 00:22 - Definition of Write Follows Read consistency model 02:42 - Sticky Session Implementation 03:40 - Naive "By Definition" Implementation 11:01 - Implementation Based on Version Vectors 18:44 - Optimizations 20:14 - Summary