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stone commented on CASSANDRA-11569: ----------------------------------- see nodeLatency.PNG,I change latency from 90ms to 30ms at 10:50,and workload are same as usual. but I cannot see the value changes. > Track message latency across DCs > -------------------------------- > > Key: CASSANDRA-11569 > URL: https://issues.apache.org/jira/browse/CASSANDRA-11569 > Project: Cassandra > Issue Type: Improvement > Components: Observability > Reporter: Chris Lohfink > Assignee: Chris Lohfink > Priority: Minor > Attachments: CASSANDRA-11569.patch, CASSANDRA-11569v2.txt, > nodeLatency.PNG > > > Since we have the timestamp a message is created and when arrives, we can get > an approximate time it took relatively easy and would remove necessity for > more complex hacks to determine latency between DCs. > Although is not going to be very meaningful when ntp is not setup, it is > pretty common to have NTP setup and even with clock drift nothing is really > hurt except the metric becoming whacky. -- This message was sent by Atlassian JIRA (v6.3.4#6332)