Tag
4 articles tagged #Distributed Systems.
P.01Use a monotonic clock for durations and timeouts, the wall clock only for timestamps. Python, JavaScript and Go code, plus the leap-second bug that shows why.
P.02How gossip protocols spread state across a cluster in log(N) rounds, why Cassandra and Consul use them, and a 20-line simulation you can run yourself.
P.03Two-phase commit makes several databases commit or abort together. How prepare and commit work, why a coordinator crash blocks you, and Postgres examples.
P.04Two writes hit different replicas at once. Which came first? Sometimes neither. How vector clocks tell a real conflict from a false one, without wall time.