Concept

Chandy–Lamport algorithm

Summary
The Chandy–Lamport algorithm is a snapshot algorithm that is used in distributed systems for recording a consistent global state of an asynchronous system. It was developed by and named after Leslie Lamport and K. Mani Chandy. History According to Leslie Lamport's website, “The distributed snapshot algorithm described here came about when I visited Chandy, who was then at the University of Texas in Austin. He posed the problem to me over dinner, but we had both had too much wine to think about it right then. The next morning, in the shower, I came up with the solution. When I arrived at Chandy's office, he was waiting for me with the same solution.” Definition The assumptions of the algorithm are as follows:
  • There are no failures and all messages arrive intact and only once
  • The communication channels are unidirectional and FIFO ordered
  • There is a communication path between any t
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