Scylla Blog

Stay up to date with recent news and updates on our Users Blog, and get under the hood on our Developers Blog.

Mar22

Scylla Open Source Release 2.3.4

Scylla Open Source Release Notes

The Scylla team announces the release of Scylla Open Source 2.3.4, a bugfix release of the Scylla Open Source 2.3 stable branch. Scylla Open Source Release 2.3.4, like all past and future 2.3.y releases, is backward compatible and supports rolling upgrades. Note that the latest stable branch of Scylla Open Source is Scylla 3.0; you are encouraged to upgrade to it. The major fix in this release is for a rare race condition between a schema update (adding or removing a column) and an initiated compaction, which may cause the compaction to write values to the wrong columns. The short […]

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Mar20

Discord, on the Joy of Opinionated Systems

Discord and Scylla

Mark Smith, Director of Engineering at Discord, manages the infrastructure team for the company that powers community across the gaming industry. Last May, when the company turned three years old, Discord boasted a user base of 130 million registered users. That compared to 45 million the year before, marking a three-fold increase in users in a single year. By the time of this writing, in March 2019, the provider of free voice and text chat focused on Internet gaming had grown its user base to over 250 million users worldwide, and thus is well on its way towards doubling in […]

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Mar19

Scylla Monitoring Stack Release 2.2

Scylla Monitoring Stack Release Notes

The Scylla team is pleased to announce the release of Scylla Monitoring Stack 2.2. Scylla Monitoring Stack is an open source stack for monitoring Scylla Enterprise and Scylla Open Source, based on Prometheus and Grafana. Scylla Monitoring Stack 2.2 supports: Scylla Open Source versions 2.3 and 3.0 Scylla Enterprise versions 2017.x and 2018.x Scylla Manager 1.3.x Related Links Scylla New Optimization Dashboard Download Scylla Monitoring 2.2 Scylla Monitoring Stack Docs Upgrade from Scylla Monitoring 2.1 to 2.2 Upgrade from Scylla Monitoring 1.x to 2.x New in Scylla Monitoring Stack 2.2 CQL optimization dashboard (#471) The CQL optimization dashboard helps identify […]

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Mar18

Scylla Open Source Release 3.0.4

Scylla Open Source Release Notes

The ScyllaDB team announces the release of Scylla Open Source 3.0.4, a bugfix release of the Scylla 3.0 stable branch. Scylla 3.0.4, like all past and future 3.x.y releases, is backward compatible and supports rolling upgrades. The major fix in this release is for a rare race condition between a schema update (adding or removing a column) and an initiated compaction, which may cause the compaction to write values to the wrong columns. The short time window where this may occur is just after compaction was initiated but before it starts writing to storage. Should the race condition occur, there […]

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Mar18

Scylla Enterprise Release 2018.1.11

Scylla Enterprise Release Notes

The ScyllaDB team announces the release of Scylla Enterprise 2018.1.11, a production-ready Scylla Enterprise minor release. Scylla Enterprise 2018.1.11 is a bug fix release for the 2018.1 branch, the latest stable branch of Scylla Enterprise. As always, Scylla Enterprise customers are encouraged to upgrade to Scylla Enterprise 2018.1.11 in coordination with the Scylla support team. The major fix in this release is for a rare race condition between a schema update (adding or removing a column) and an initiated compaction, which may cause the compaction to write values to the wrong columns. The short time window where this may occur, […]

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Mar14

From SAP to Scylla: Tracking the Fleet at GPS Insight

From SAP to Scylla: Tracking the Fleet at GPS Insight

“Scylla is the ideal database for IoT in the industry right now. Especially without the garbage collection that Cassandra has. Small footprint. It just does what you need it to do.” — Doug Stuns, GPS Insight Doug Stuns began his presentation at Scylla Summit 2018 by laying out his company’s goals. Founded in 2004, GPS Insight now tracks more than 140,000 vehicles and assets. The company collects a wide variety of data for every one of those vehicles. Battery levels, odometer readings, hard stops, acceleration, vehicle performance, emissions, and GPS data to determine route efficiency. By the time Doug was […]

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Mar12

Deep Dive into the Scylla Spark Migrator

Scylla and Spark

Another week, another Spark and Scylla post! This time, we’re back again with the Scylla Spark Migrator; we’ll take a short tour through its innards to see how it is implemented. Read why we implemented the Scylla Spark Migrator in this blog. Overview When developing the Migrator, we had several design goals in mind. First, the Migrator should be highly efficient in terms of resource usage. Resource efficiency in the land of Spark applications usually translates to avoiding data shuffles between nodes. Data shuffles are destructive to Spark’s performance, as they incur more I/O costs. Moreover, shuffles usually get slower […]

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Mar7

Scylla and Elasticsearch, Part Two: Practical Examples to Support Full-Text Search Workloads

Scylla and Elasticsearch

We covered the basics of Elasticsearch and how Scylla is a perfect complement for it in part one of this blog. Today we want to give you specific how-tos on connecting Scylla and Elasticsearch, including use cases and sample code. Use Case #1 If combining a persistent, highly available datastore with full text search engine is a market requirement, then implementing a single, integrated solution is an ultimate goal that requires time and resources. To answer this challenge we describe below a way for users to use best-of-breed solutions that support full text search workloads. We chose Elasticsearch open source together with […]

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Mar5

Tantan Connects with Scylla to Help Singles Find Their Closest Match

Tantan and Scylla

About Tantan Tantan is a locality-based dating app that provides a venue for people to connect and expand their social circles. More than 160 million men and women have used Tantan to chat, form new friendships, and, ideally, find their perfect match. We have more than 10 million daily active users. Our app delivers profiles of people that might be interesting to our users. Those profiles incorporate photos, likes, and interests. After evaluating prospective matches, users can ‘like’ favorites with a swipe. If the swipe is reciprocated, a match is struck. Once matched up, users can interact via texts, voice […]

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Feb27

Introducing Scylla University

Scylla University

So you’re thinking of running your applications with Scylla? You’ve probably heard it’s a lightning fast, self-optimizing, highly available Apache Cassandra drop-in replacement. Yet you may still have questions like: How do I upgrade from my current system? How many nodes do I need? How do I ensure that my data is consistent across the database? How should applications be written to maximize database performance? How do I scale up or scale out? To make it easier to find answers to these questions and many more, we have launched Scylla University. Anyone in your organization can now take advantage of […]

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