How do I know what version of DSE I have?
OPTION 1 – Use the dse command Specify the -v (version) flag with the command. Run the nodetool version command to get the version of the database included in DSE.
What is DSE spark?
DSE includes Spark Jobserver, a REST interface for submitting and managing Spark jobs. Spark examples. DataStax Enterprise includes Spark example applications that demonstrate different Spark features.
What is the latest version of Cassandra?
The latest version of Apache Cassandra 3.0 is 3.0. 19.
What is spark Cassandra?
The fundamental idea is quite simple: Spark and Cassandra clusters are deployed to the same set of machines. Cassandra stores the data; Spark worker nodes are co-located with Cassandra and do the data processing. Spark is a batch-processing system, designed to deal with large amounts of data.
What version of Apache Cassandra Do I have Linux?
Open cqlsh and type show VERSION . This gives all the versions of cqlsh, DSE, Cassandra etc.
How do I upgrade Cassandra?
Steps for upgrade cassandra version
- Run nodetool drain before shutting down the existing Cassandra service.
- Stop cassandra services.
- Back up your cassandra configuration files from the old installation to safe place.
- Update java version.
- Install the new version of Apache Cassandra.
- Configure the new product.
How do I connect Pyspark to Cassandra?
2 Answers
- run pyspark with: ./bin/pyspark –packages com.datastax.spark:spark-cassandra-connector_2.11:2.0.2.
- In the code, create dict with connection config. hosts = {“spark.cassandra.connection.host”: ‘host_dns_or_ip_1,host_dns_or_ip_2,host_dns_or_ip_3’}
- In the code, Create Dataframe using connection config.
Why is Cassandra called NoSQL?
Apache Cassandra is a highly scalable, high-performance distributed database designed to handle large amounts of data across many commodity servers, providing high availability with no single point of failure….NoSQL vs. Relational Database.
| Relational Database | NoSql Database |
|---|---|
| It has a fixed schema. | No fixed schema. |
Can Cassandra be used for analytics?
Cassandra is great for storing and querying large amounts of high-performance data which is why it’s often used in IoT analytics and real-time data analytics use cases. You want your analytics platform to leverage and build on the strength of your Cassandra implementation. With Knowi, that is precisely what you get.
What is Spark SQL?
Spark SQL is a Spark module for structured data processing. It provides a programming abstraction called DataFrames and can also act as a distributed SQL query engine. It enables unmodified Hadoop Hive queries to run up to 100x faster on existing deployments and data.
How do I run a spark application on a DSE cluster?
If you are planning to execute your Spark Application on a DSE cluster, use the dse bootstrap project which greatly simplifies dependency management. It leverages the dse-spark-dependencies library which instructs a build tool to include all dependency JAR files that are distributed with DSE and are available in the DSE cluster runtime classpath.
Which version of DSE is compatible with Zeppelin in sparkr?
DSE 6.7.3 is not compatible with Zeppelin in SparkR and PySpark 0.8.1. (DSP-18777) The Apache Spark ™ 2.2.3.4 that is included with DSE 6.7.3 contains the patched protocol and all versions of DSE are compatible with the Scala interpreter.
Which version of Spark is compatible with Scala?
The Apache Spark ™ 2.2.3.4 that is included with DSE 6.7.3 contains the patched protocol and all versions of DSE are compatible with the Scala interpreter. However, SparkR and PySpark use only a separate channel for communication with Zeppelin.
What’s new in DSE 6?
See 6.8.2 DSE database changes and enhancements below. Storage-Attached Indexing (SAI), a beta feature, adds supports for defining an index based on an individual column that is part of the table’s composite partition key. You can define separate, additional SAI indexes on other individual columns in the same table’s composite partition key.