http://www.datastax.com/support-forums/topic/jdbc-interaction-with-cassandra Software, Support, and Training for Apache Cassandra en-US Sat, 25 May 2013 23:18:56 +0000 http://bbpress.org/?v=1.0.3 q http://www.datastax.com/support-forums/search.php http://www.datastax.com/support-forums/topic/jdbc-interaction-with-cassandra#post-4420 Tue, 31 Jul 2012 14:00:47 +0000 thepaul 4420@http://www.datastax.com/support-forums/ <p>That's right, the client software must be able to reconnect to a different node if the coordinator goes down. Ideally the CQL driver or other Cassandra connector library would take care of that for you, but not all of them do yet. </p> http://www.datastax.com/support-forums/topic/jdbc-interaction-with-cassandra#post-4394 Tue, 31 Jul 2012 08:26:01 +0000 hardikupadhyay 4394@http://www.datastax.com/support-forums/ <p>I want to understand that how cassandra ensures high availability. What i know is when we query casssandra database for data, a node called coordinator route the query to the appropriate cassandra node in the cluster with the required data. But what if the node which we specify in JDBC connection URL (Which i think will act as coordinator in the cluster, please make me correct if i am wrong) itself down? In this case how come cassandra ensures high availability?</p> <p>Perhaps we as a developer must provide fallback mechanism for that?</p> <p>Please help me out to understand this. </p> http://www.datastax.com/support-forums/topic/jdbc-interaction-with-cassandra#post-3961 Fri, 27 Jul 2012 09:03:30 +0000 xedin 3961@http://www.datastax.com/support-forums/ <p>I don't know about JDBC but if you want to insert columns that you don't have in your schema you can use Thrift which allows that for sure. </p> http://www.datastax.com/support-forums/topic/jdbc-interaction-with-cassandra#post-3943 Fri, 27 Jul 2012 05:31:56 +0000 hardikupadhyay 3943@http://www.datastax.com/support-forums/ <p>Thanks for the reply, one more thing which i like to know is ,can i insert different columns which i have not specified in schema definition?</p> <p>Because i tried , and it failed. </p> http://www.datastax.com/support-forums/topic/jdbc-interaction-with-cassandra#post-3841 Thu, 26 Jul 2012 09:32:25 +0000 xedin 3841@http://www.datastax.com/support-forums/ <p>Yes, you need to create your schema before using JDBC. </p> http://www.datastax.com/support-forums/topic/jdbc-interaction-with-cassandra#post-3809 Thu, 26 Jul 2012 05:15:30 +0000 hardikupadhyay 3809@http://www.datastax.com/support-forums/ <p>Hi,<br /> I want to know<br /> Does JDBC needs predefined cassandra column family structure?<br /> Means should i create column family schema prior to inserting data into column family<br /> via JDBC? </p>