Chaos Engineering - Netflix terminates Production Instances to Induce latency - HP firmware division breaks code to catch in Buildchain. - Facebook has project storm. - Dropbox DRT - Azure
- Lead Time Amount of time it takes for an item. - Work In Progress Total number of items in Queue. - Throughput Number of items getting done per unit of time. Little’s Law
CAP Theorem Node represents an individual capable of making a choice - C Any node who makes a decision, informs other nodes. - A Every node can make a decision. - P Decision cannot be made without involving every node.
Testing & Refactoring - http://www.nist.gov/director/prog-ofc/report02-3.pdf (Year 2002) - Software bugs are costing the U.S. economy an estimated $59.5 billion each year. - Users incurred 64% of the cost and developers 36%. - While impossible to Eliminate Bugs it can reduce the costs by a /3rd