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From Matija Gobec <>
Subject Re: ONE has much higher latency than LOCAL_ONE
Date Tue, 21 Mar 2017 19:56:43 GMT
Are you running a multi DC cluster? If yes do you have application in both
data centers/regions ?

On Tue, Mar 21, 2017 at 8:07 PM, Shannon Carey <> wrote:

> I am seeing unexpected behavior: consistency level ONE increases read
> latency 99th percentile to ~108ms (95th percentile to 5ms-90ms) up from
> ~5ms (99th percentile) when using LOCAL_ONE.
> I am using DSE 5.0 with Datastax client 3.0.0. The client is configured
> with a TokenAwarePolicy wrapping a DCAwareRoundRobinPolicy with
> usedHostsPerRemoteDc set to a very high number. Cassandra cluster has two
> datacenters.
> I would expect that when the cluster is operating normally (all local
> nodes reachable), ONE would behave the same as LOCAL_ONE. The  Does anyone
> know why this is not the case?

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