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If you like wrestling with dependencies and version incompatibility issues as much as I do, then this post is for you! This post arises out of a project requiring execution of Gremlin traversals using multiple query APIs, and from both a DSE Graph Analytics cluster and an external Spark cluster at the same time. What we found is that keeping all the different available DSE libraries straight wasn’t always easy. The goal of this blog post is to summarize what we learned from the project so that others can know which library to use and why, particularly when using Spark and Graph with Cassandra. We will look at seven libraries, including DSE Java Driver, OSS Unified Java Driver, dse-java-driver-graph, OSS Spark Cassandra Connector, DSE GraphFrames, BYOS, and dse-spark-dependencies.Continue reading
In Apache Cassandra Lunch #59: Functions in Cassandra, we discussed the functions that can be used inside of the Cassandra database. The live recording of Cassandra Lunch, which includes a more in-depth discussion and a demo, is embedded below in case you were not able to attend live. If you would like to attend Apache Cassandra Lunch live, it is hosted every Wednesday at 12 PM EST. Register here now!Continue reading
In this blog post, we will discuss the different session classes available in the Cassandra Java driver. A session is meant to handle the execution of certain types of commands on a Cassandra cluster. Different types of sessions are meant to handle different types of interactions. Sessions can also configure the way that they connect to a Cassandra cluster, manipulating where interactions are sent for processing.Continue reading