The cluster is in two DCs, and yes the client is deployed locally to each DC.
From: Matija Gobec <matija0...@gmail.com<mailto:matija0...@gmail.com>> Reply-To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" <user@cassandra.apache.org<mailto:user@cassandra.apache.org>> Date: Tuesday, March 21, 2017 at 2:56 PM To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" <user@cassandra.apache.org<mailto:user@cassandra.apache.org>> Subject: Re: ONE has much higher latency than LOCAL_ONE 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 <sca...@expedia.com<mailto:sca...@expedia.com>> 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?
