Martin Fowler Identify and separate systems by product line. Many applications are built to serve multiple logical products from the same

Martin Fowler We have spent most of the last couple of decades helping large organizations overhaul their legacy systems. In doing this

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Martin Fowler Solution While the write requests need to go to the leader to maintain consistency, the read-only requests can instead go to the

Martin Fowler Giving talks has been one of the pillars of my career. I’ve given keynotes at software events all over the world. Some of these

Martin Fowler Each key value is associated with a version vector that maintains a number for each cluster node. In essence, a version vector is a

Martin Fowler Solution Hybrid Logical Clock provides a way to have a version which is monotonically increasing just like a simple integer, but

Martin Fowler Problem When values are stored across multiple servers, there needs to be a way to know which values were stored before the other.

Martin Fowler Store a version number with each value. The version number is incremented for every update. This allows every update to be

Martin Fowler Solution Cluster nodes use gossip style communication to propagate state updates. Each node selects a random node to pass the