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George commented on CASSANDRA-3858: ----------------------------------- I'm surprised there's not great interest for such a feature. Propagation delays must be a valid concern. What am I missing? > expose "propagation delay" metric in JMX > ---------------------------------------- > > Key: CASSANDRA-3858 > URL: https://issues.apache.org/jira/browse/CASSANDRA-3858 > Project: Cassandra > Issue Type: Improvement > Reporter: Peter Schuller > Priority: Minor > > My idea is to augment the gossip protocol to contain timestamps. We wouldn't > use the timestamps for anything "important", but we could use them to allow > each node to expose a number which is the number of milliseconds (or seconds) > "old" information is about nodes that are "the oldest" and also alive. > When nodes go down you'd see spikes, but for most cases where nodes live, > this information should give you a pretty good idea of how fast gossip > information is propagating through the cluster, assuming you keep your clocks > in synch. > It should be a good thing to have graphed, and to have alerts on. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org