User perceived Availability and Experience is important for any eCommerce site. Achieving this is not easy for distributed systems that run multiple platforms and access multiple resources, data sources. The data sources span MySQL, Key-Value stores and Columnar databases storing OLTP data to the order of tens of millions.

This talk describes how Flipkart built its website to manage Latency and Fault tolerance at scale - millions of requests amounting to 1.5 billion service calls per day.