by Dor Laor

Project Circe is ScyllaDB’s year-long initiative to make Scylla, already the best NoSQL database, even better. We’re sharing our updates for the month of May 2021.

Operational Improvements

Better failure detection

Failure detection is now done directly by nodes pinging each other rather than through the gossip protocol. This is more reliable and the information is available more rapidly. Impact on networking is low, since Scylla implements a fully connected mesh in all clusters smaller than 256 nodes per datacenter, which is much larger than the typical cluster.

SLA per workload

Scylla supports multiple workloads, some with real-time guarantees, some have batch nature where latency…


by Guy Shtub

Hands-on Labs for Scylla in Your Browser

Scylla University now includes interactive labs that allow trainees to have an immediate hands-on experience with our products without requiring a local installation or setup. The labs use Katacoda to run a virtual terminal in your browser without the need to configure anything. They are embedded into the relevant Scylla University lessons, which makes them even more engaging.


by Avishai Ish Shalom

Getting your database running at the right scale and speed to handle your growing business should not be complex or confusing. As I wrote in a previous blog post, capacity planning is not to be discounted and providing tools to streamline it is part of our mission.

To help you get started, we recently released our Scylla Cloud pricing and sizing calculator. This handy tool takes your peak workload requirements in terms of transactions per second and total data stored to recommend the proper sized cluster to run sustained workload.

But the real test is to…


by Tzach Livyatan

Scylla is pleased to announce the availability of Scylla Enterprise 2021, a production-ready Scylla Enterprise major release. After more than 2,500 commits originating from five open source releases, we’re excited to now move forward with Scylla Enterprise 2021. This release marks a significant milestone for us. While we’ve said for years we are a drop-in replacement for Apache Cassandra we are now also a drop-in replacement for Amazon DynamoDB.

Scylla Enterprise builds on the proven features and capabilities of Scylla Open Source and provides greater reliability from additional vigorous testing, as well as a set of unique…


by Avishai Ish Shalom

Pekka Enberg has been working on Scylla since before its inception in 2014. Prior to joining ScyllaDB he worked on a variety of technologies ranging from High Frequency Trading (HFT) backends through the JVM runtime to kernels, and also web applications. Pekka is currently working on a PhD in computer science exploring new kernel abstractions and interfaces suitable for modern computer architectures.

Being fascinated by the evolution of hardware and software and the mismatch that sometimes happens between them — or rather, their intricate co-evolution — I couldn’t resist the opportunity to ask Pekka for his…


By Maciej Zimnoch

Modern deployments are kept as code, and it is very common that development, staging and production environments differ only in a few properties like allocated resources. When Kubernetes is used as infrastructure, duplication of manifests for all types of deployments may be error prone. That’s why Helm templates are quite popular these days.

With Scylla Operator 1.1 we introduced three Helm Charts which will help you to deploy and customize Scylla products using Helm.

Helm Charts

Helm Charts are templated Kubernetes manifests combined into a single package that can be installed on your Kubernetes cluster. …


By Peter Corless

Mapped launched their service this year to enable businesses to control and manage their facilities via a unified AI-powered data infrastructure platform. Their modular and extensible platform brings together disparate data sets via various APIs related to the Industrial Internet of Things (IIoT). From your lobby, to your elevators, from your HVAC and power systems to your industrial devices and security systems, it provides an all-in-one-view.

Mapped has done precisely that — mapped over 30,000 different makes/models of devices across 900 different classes — using a GraphQL API and industry-standard ontology allowing developers and users to build…


by Peter Corless

Project Circe is ScyllaDB’s year-long initiative to make Scylla, already the best NoSQL database, even better. For the month of April we are going to take a look inside the organization and code base to see what it takes to bring major new features into a project as dynamic as Scylla. Currently there are nearly a half-million lines of code in the scylladb/scylla repository on Github (482.7k as of this writing). Of those thousands of source lines of code so far are dedicated to the library implementing the new Raft consensus protocol.

Raft and the Logical Clock

We’ve already covered what Raft…


By Piotr Dulikowski

In Scylla Open Source 4.3, we introduced a feature called shard-aware port. In addition to listening for CQL driver connections on the usual port (by default 9042), Scylla now also listens for connections on another port (by default 19042). The new port offers a more robust method of connecting to the cluster which decreases the number of connection attempts that the driver needs to make.

In this blogpost, we will describe problems that arise when using the old port and how the new port helps to overcome them.

Token-awareness, Shard-awareness

To understand the problem the shard-aware port solves, we…


By Nathan Pensack-Rinehart

In 2020, FullContact launched our Resolve product, backed by Cassandra. Initially, we were eager to move from our historical database HBase to Cassandra with its promises for scalability, high availability, and low latency on commodity hardware. However, we could never run our internal workloads as fast as we wanted — Cassandra didn’t seem to live up to expectations. Early on, we had a testing goal of hitting 1000 queries per second, and then soon after 10x-ing that to 10,000 queries per second through the API. …

ScyllaDB

The monstrously-fast NoSQL database.

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