I have an webservice API allowing client to insert into Cassandra. I read the document on the page of datastax (http://www.datastax.com/drivers/java/2.0/com/datastax/driver/core/Session.html) stati...

I have recently lowered gc_grace_seconds for a CQL table. I am running LeveledCompactionStrategy. Is it possible for me to force purging of old tombstones from my SSTables?

I would like to run Cassandra Datastax Enterprise on Amazon EC2 instances using not the node private IP address but Elastic Public IPs My current configuration looks as follows: /etc/dse/cassandr...

I am getting this error while performing a simple join between two tables. I run this query in Hive command line. I am naming table as a & b. Table a is Hive internal table and b is External ta...

I'm using DSE for Cassandra/Solr integration so that data are stored in Cassandra and indexed in Solr. It's very natural to use Cassandra to handle CRUD operation and use Solr for full text search ...

Does anyone know how to use Datastax enterprise (using opscenter) in a cluster using amazon ec2 M3.Xlarge machines? When I have tried to use these type of instances (that use ssd) I got the followi...

We have 2 cassandra clusters, first one has the old data and second one has the new data. Now we want to move or copy the old data from first cluster to second. What is the best way to do this an...

I'm just posting this as a solution for those who encounters error in using Datastax's Java Driver on Glassfish 4 through Maven deployment. As was written on Datastax's web site, the depende...

I am using DataStax Cassandra 1.2.3 on a 6 node cluster each having quad-core 3GHz processor and 8GB RAM. Recently, I started to use the VNodes feature by setting the num_tokens to 256 first and th...

I am a newbie to Cassandra - I have been searching for information related to commits and crash recovery in Cassandra on a single node. And, hoping someone can clarify the details. I am testing Ca...

Should a com.datastax.driver.core.PreparedStatement instance be a singleton in an application ? If so, what happens if the connection is lost ? Does the PreparedStatement become invalid and a manu...

I'm trying to connect to DataStax 3.0 enterprise installed in a Ubuntu desktop running inside a VM from a C# client (courtesy CassandraSharp). As per the documentation there, ("Cassandra does not...