While this might not be helpful (I don't have all the thread history here), have you checked that all your servers are properly synced with NTP?
From: Everton Lima <peitin.inu...@gmail.com<mailto:peitin.inu...@gmail.com>> Reply-To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" <user@cassandra.apache.org<mailto:user@cassandra.apache.org>> Date: Monday, November 19, 2012 6:24 PM To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" <user@cassandra.apache.org<mailto:user@cassandra.apache.org>> Subject: Re: SchemaDisagreementException Yes I already have tested. I use the Object CassandraServer to do the operations instead of open conection with CassandraClient. Both of this object implements Iface. I think the performace of use CassandraServer improve because it does not open an connection, and CassandraClient (that use thrift) and CQL open a connection. 2012/11/19 Tyler Hobbs <ty...@datastax.com<mailto:ty...@datastax.com>> Have you actually tested to see that the Thrift API is more performant than CQL for your application? As far as I know, CQL almost always has a performance advantage over the Thrift API. On Mon, Nov 19, 2012 at 1:05 PM, Everton Lima <peitin.inu...@gmail.com<mailto:peitin.inu...@gmail.com>> wrote: For some reason I can not reply my old thread in that list. So I was creating a new one. The problem is that I do not use thrift to gain in performace. Why it is nicer with concurrent modifications? I do not know why I have falling in the problem of concurrent modification if I was creating 2 keyspaces diferent in only one process with just one thread. Someone knows why? -- Everton Lima Aleixo Bacharel em Ciencia da Computação Universidade Federal de Goiás -- Tyler Hobbs DataStax<http://datastax.com/> -- Everton Lima Aleixo Bacharel em Ciencia da Computação Universidade Federal de Goiás 'Like' us on Facebook for exclusive content and other resources on all Barracuda Networks solutions. Visit http://barracudanetworks.com/facebook