Merge two clusters into one - renaming an existing cluster

2013-06-23 Thread Ananth Gundabattula
Hello Everybody, I am trying to merge two clusters into a single cluster ( the rationale being easier administration apart from better load balancing etc) The plan is to rename a cluster (QAPERF1) as the same name as the second cluster (QAPERF2). Then alter the cassandra-toppology.properties an

about FlushWriter "All time blocked"

2013-06-23 Thread yue . zhang
3 node cent os CPU 8core memory 32GB cassandra 1.2.5 my scenario: many counter incr, every node has one client program, performance is 400 wps /every clicent (it’s so slowly) my question: Ø nodetool tpstats - Pool NameActive Pending Com

Cassandra 1.0.9 Performance

2013-06-23 Thread G man
Hi All, We are running a 1.0.9 cluster with 3 nodes (RF=3) serving a load of approximately 600GB, and since I am fairly new to Cassandra, I'd like to compare notes with other people running a cluster of similar size (perhaps not in the amount of data, but the number of nodes). Does anyone have CP

Re: Cassandra driver performance question...

2013-06-23 Thread Tony Anecito
Hi Jabbar,    I was able to get the performance issue resolved by reusing the connection object. It will be interesting to see what happens when I use a connection pool from a app server.   I still think it would be a good idea to have a minimal mode for metadata. It is rare I use metadata.   Re

Re: Upgrade from 1.1.10 to 1.2.4

2013-06-23 Thread Ananth Gundabattula
Looks like the cause of the error was because of not specifying num_tokens in the cassandra.yaml file. I was under the impression that setting a value of num_tokens will override the initial_token value . Looks like we need to set num_tokens to 1 to get around this error. Not specifying anythin