This blog is the second part of a series “Spark – the Pragmatic bits”. Get the full overview here.The simplest and most obvious choice is to get DataStax Enterprise which contains Cassandra, Spark wit...

This blog is the third part of a series “Spark – the Pragmatic bits”. Get the full overview here.My colleague Dávid Borsós recently wrote a blog post on “Data Analytics using Cassandra and Spark”, cov...

Tombstones are a mechanism which allows Cassandra to write fast but it has an operational price to pay. First of all, tombstones are themselves records. They take up space and can substantially increa...

Saradnici This article describes basic aggregation operations against Azure Cosmos DB Cassandra API tables from Spark. NoteServer-side filtering, and server-side aggregation is c...

Something so simple can be so difficult to find. Cassandra’s documentation isn’t the best or easiest to find specific commands. How do you list all the tables in Cassandra?Make sure that cassandra’s b...

Are you considering Cassandra or MongoDB as the data store for your next project?  Would you like to compare the two databases?  Cassandra and MongoDB are both “NoSQL” databases, but the reality is th...

Count rows in Cassandra TableSimple program to count the number of records in a Cassandra table. By splitting the token range using the numSplits parameter, you can reduce the amount each query is cou...

When you use DevCenter, you define a connection with one or more server.Thus, when you do an CQL instruction, this one is done on the cluster with the default consistency level ( the consistency level...