Virtual Workshops
Twice-monthly interactive sessions with our NoSQL solution architects.
Join Our Next Session >

Scylla Open Source 4.2

Scylla Open Source Box icon

Scylla Open Source 4.2

Scylla Open Source Box icon

Scylla Open Source 4.2 introduces a rich set of new production-ready features, including Lightweight Transactions (LWT), DynamoDB API compatibility, Change Data Capture, offline installers and more. Already the best high-performance NoSQL database for big data workloads, Scylla builds upon the best attributes of Apache Cassandra and Amazon DynamoDB by improving performance, scalability, and cost-efficiency.

What’s New in Scylla Open Source

Production Ready Features

Cobalt blue arrow

Binary Search in SSTable Promoted Index (4.2+)

Prior to Scylla Open Source 4.2, lookups in the promoted index were done by scanning the index linearly, so that the lookup took O(n) time. This is inefficient for large partitions, consuming a great deal of CPU and I/O. Now the reader scans the SSTable promoted index with a binary search, reducing search time to O(log n). In our testing, searches were conducted 12x faster, CPU utilization was only 1/10th (10%), and disk I/O was reduced to 1/20th (5%) the prior rate.

Cobalt blue arrow

DynamoDB API Compatibility (Project Alternator) (4.0+)

Our Amazon DynamoDB API implementation, known as Project Alternator, enables you to connect applications/services built for the DynamoDB API to Scylla without changing your client code. This gives your team multi-cloud, multi-vendor flexibility to improve system resilience and include a disaster recovery plan in your playbook.

Cobalt blue arrow

Lightweight Transactions (LWT) (4.0+)

Scylla LWTs allow stronger consistency guarantees using the Paxos consensus algorithm. They ensure requests on a distributed database are processed in a strict, linearized (serial) method, in a process known as ‘Compare and Set.’. They are also called ‘Conditional Updates,’ because they can test the databases’ existing values before submitting the update. This provides atomic consistency for single keys, allowing updates to be performed in order on a global basis. They can also be used for batches, to ensure all conditions are met before submitting a batch update.

Experimental Features

Cobalt blue arrow

Change Data Capture (CDC) (3.2+)

This feature allows you to track changes made to a base table in your database for visibility or auditing. Changes made to the base table are stored in a separate table that can be queried by standard CQL. Our CDC implementation uses a configurable Time To Live (TTL) to ensure it does not occupy an inordinate amount of your disk.       

Cobalt blue arrow

User Defined Functions (UDF) in Lua (3.3+)

User Defined Functions (UDF) in Lua adds the ability for teams to build server-side scripts that can run complex transforms such as aggregations, sums, averages, minimums, and maximums.  This allows developers to simplify their database queries and the use of multiple large queries with large payloads. 

Management Capabilities

Scylla’s suite of applications for management and monitoring have been updated for Scylla Open Source 3.0, along with a new Scylla Operator for Kubernetes.

Cobalt blue arrow

Scylla Manager

Our automated cluster management system allows you to scheduled or ad hoc repairs and backups, and to perform health checks on your cluster. Open source users can deploy Scylla Manager on clusters of up to five nodes.

Cobalt blue arrow

Scylla Monitoring Stack

Comprised of widely-adopted open source solutions like Grafana, Prometheus and Alertmanager, Scylla Monitoring Stack allows you to set up dashboards and get alerts precisely how you need to ensure you’re getting the highest uptime and best performance for your Scylla database.

Cobalt blue arrow

Kubernetes Operator

Kubernetes has become the go-to technology for the cloud devops community. It allows for the automated provisioning of cloud-native containerized applications, supporting the entire lifecycle of deployment, scaling, and management. Scylla Operator is our extension to enable the management of Scylla clusters. It currently supports deploying multi-zone clusters, scaling up or adding new racks, scaling down, and monitoring Scylla clusters with Prometheus and Grafana.

New with Scylla Open Source 3.x

See what we introduced previous to Scylla 4.0. Read More


Learn the details about Scylla’s newest features and capabilities. Get the most out of our highly performant open source NoSQL database.

Join our co-founders, CEO Dor Laor and CTO Avi Kivity for an overview of Scylla 4.0.

Our open source Amazon DynamoDB-compatible API allows you to run your database on any cloud or on premises.

How to use lightweight transactions in Scylla; learn the similarities and differences between Scylla’s Paxos implementation and Cassandra’s.

CDC enables the user to track updates to tables in real time. Learn how they work under the hood, and why they are a vast improvement over Cassandra.

Take the new lesson on how to deploy and manage Scylla using the new Kubernetes Operator. Learn how to scale up and scale down clusters and use stateful sets effectively.

Scylla University Mascot

Scylla University

Get started on the path to Scylla expertise.

Live Test CTA

Live Test

Spin up a 3-node Scylla cluster to see our light-speed performance

Virtual Workshop

Interactive sessions with our NoSQL solution architects.