What is Cassandra repository?

What is Cassandra repository?

Cassandra-specific extension of the CrudRepository interface that allows the specification of a type for the identity of the @Table (or @Persistable ) type. Repositories based on CassandraRepository can define either a single primary key, use a primary key class or a compound primary key without a primary key class.

What is a Cassandra template?

CassandraTemplate builds on top of the low level CqlTemplate and provides a simple way to query domain objects and map the objects to a persisted data structure in Cassandra. Let’s start with the configuration and then dive into examples of using the two templates.

Can we use JPA with Cassandra?

Use JPA libraries to communicate with Apache Cassandra comparing Achilles, Datastax and Kundera. The last one presents the better processing speeds with lower computational resources consumption. Source code is available on Github with detailed documentation on how to build and run the tests using Docker.

How do I retrieve data from Cassandra?

Cassandra – Read Data

1. Example. Assume there is a table in the keyspace named emp with the following details −
2. Step1:Create a Cluster Object. Create an instance of Cluster.
3. Step 2: Create a Session Object.
4. Step 3: Execute Query.
5. Step 4: Get the ResultSet Object.

What is Cassandra database?

Apache Cassandra is a distributed database management system that is built to handle large amounts of data across multiple data centers and the cloud. Key features include: Highly scalable. Offers high availability.

How do I connect to Cassandra database?

Apache Cassandra with SSL

1. Create a Apache Cassandra connection Open data source properties.
2. Verify the version of the JDBC driver Verify that you use the JDBC driver of version 1.3, or later.
3. Set VM options Open data source properties.
4. Add the sslenabled option to the JDBC URL

What is Cassandra consistency level?

The Cassandra consistency level is defined as the minimum number of Cassandra nodes that must acknowledge a read or write operation before the operation can be considered successful. Different consistency levels can be assigned to different Edge keyspaces.

Does hibernate support Cassandra?

Yes Hibernate is supporting cassandra but it is still under experimental stage!! so read the below notes carefully before you use it. This implementation uses CQL3 over the native wire protocol with java-driver. The currently supported version is Cassandra 2.1.

How fast is Cassandra read?

Reads Workload – Only Reads

What is Cassandra data model?

Cassandra Data modeling is a process used to define and analyze data requirements and access patterns on the data needed to support a business process. A data model helps define the problem, enabling you to consider different approaches and choose the best one.

What is difference between MongoDB and Cassandra?

In sum, Cassandra is the modern version of the relational database, albeit where data is grouped by column instead of row, for fast retrieval. MongoDB stores records as documents in JSON format. It has a JavaScript shell and a rich set of functions which makes it easy to work with.

What is Cassandra best used for?

One open source application, Apache Cassandra, enables organisations to process large volumes of fast moving data in a reliable and scalable way. That’s why companies like Facebook, Instagram and Netflix use Apache Cassandra for mission-critical features.