Scylla Blog

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Posts with tag "seastar"

Oct15

Introducing Scylla Open Source 3.1

The Scylla team is pleased to announce the availability of Scylla Open Source 3.1.0, a production-ready release of our open source NoSQL database. Scylla is an open source NoSQL database offering the same Cassandra Query Language (CQL) interface as Apache Cassandra, along with the same horizontal scale-out and fault-tolerance characteristics. Implemented from scratch in C++ with a close-to-the-hardware architecture, Scylla delivers 10X the throughput, consistent, low single-digit latencies, and significantly reduces the number of database nodes you require and self-optimizes to dynamic workloads and various hardware combinations. With the release of Scylla Open Source 3.1, we’ve introduced a number of […]

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Sep11

Scylla Alternator: The Open Source DynamoDB-compatible API

Alternator

About Scylla’s Alternator Project Alternator is an open source project that gives Scylla compatibility with Amazon DynamoDB™. Our goal is that any application written for Amazon DynamoDB could be run, unmodified, against Scylla with Alternator enabled. Originally, Scylla began as a re-implementation of Apache Cassandra, and it has since proven to be a solid database engine with key performance and TCO benefits over Cassandra. However, we always considered Cassandra to be just a starting point. Now a 5-year old project, Scylla is able to scale to hundreds of machines, petabytes of data and many regions and availability zones. Scylla can […]

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Feb20

ValuStor — a memcached alternative built on Scylla

Derek Ramsey, Software Engineering Manager at Sensaphone, gave an overview of ValuStor at Scylla Summit 2018. Sensaphone is a maker of remote monitoring solutions for the Industrial Internet of Things (IIoT). Their products are designed to watch over your physical plant and equipment — such as HVAC systems, oil and gas infrastructure, livestock facilities, greenhouses, food, beverage and medical cold storage. Yet there is a lot of software behind the hardware of IIoT. ValuStor is an example of ostensible “hardware guys” teaching the software guys a thing or two. Overview and Origins of ValuStor Derek began his Scylla Summit talk […]

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Nov15

Honoring Our Users at the Scylla Summit

There’s nothing we enjoy more than seeing the creative and impressive things our users are doing with Scylla. With that in mind, we presented our Scylla User Awards at last week’s Scylla Summit, where we brought the winners up on stage for a big round of applause and bestowed them with commemorative trophies. I’m glad to share the winners here, along with a few notes on their use of Scylla. Most Interesting Technical Use Case: Nauto Nauto makes our roads safer. The company’s devices are deployed to fleet vehicles to monitor driver performance and help reduce risky behaviors. Nauto uses […]

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Aug14

Improvements to Scylla Streaming Performance

In this blog post, we will take a closer look at how Scylla streaming works in detail and how Scylla 2.4’s new streaming improves streaming bandwidth by 240% and reduces the time it takes to perform a “rebuild” operation by 70%.

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Feb21

The Seastar Framework Was Accepted for Google Summer of Code

Interested in contributing code to a framework that provides Scylla and other programs with high-throughput I/O and networking? The Scylla team is pleased to announce that the Seastar framework has been accepted as a Google Summer of Code organization. Google Summer of Code with the Seastar project provides students with the opportunity to spend their summer break contributing to an awesome open source project, work under the mentorship of dedicated, brilliant engineers, and in addition receiving a stipend when the project milestones are met.

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Feb15

Adventures with Memory Barriers and Seastar on Linux

Unshared data structure

Seastar provides a programming environment that abstracts away most of the problems of multi-threaded programming using a thread-per-core model. Locks, atomic variables, memory barriers, lock-free programming, and all of the scaling and complexity that come from them are gone. In their place, Seastar provides a single facility for inter-core communications. This is, of course, great for the developer, who can easily utilize many-core machines, but there is also another side: because Seastar takes care of all inter-core communications, it can apply advanced optimizations to these communications.

This article examines these optimizations and some of the complexity involved.

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Jan7

The Cost of Avoiding a Meltdown

meltdown

As most earthlings are aware by now, two severe attacks under the names of Meltdown and Spectre were currently disclosed and it affects pretty much everybody living in modern society. Although there is no defense against the more elaborate Spectre, there is a software defense against the more widespread Meltdown. However, there is a catch that set the Internet on fire over the past few days. To protect oneself against Meltdown brings with it a performance penalty of up to 30%.

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Jan4

Seastar: The future<> is Here

This is a cross-post from https://www.alexgallego.org/concurrency/smf/2017/12/16/future.html. On June 8, 2016, Avi Kivity came to NYC to present ScyllaDB. During his search for a quick open desk to do some work, I volunteered open spaces we had at Concord1. We talked lock-free algorithms, memory reclamation techniques, threading models, Concord and distributed streaming engines, even C vs C++. Five hours later I was convinced that Seastar was the best systems framework I’d ever come across.

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Mar18

How to implement a 10x faster Apache Cassandra: slides available

Nadav Har’El gave a detailed talk on the plans and design behind Scylla at the Generalist Engineer meetup in Tel Aviv. The talk covers the some details of the Seastar C++ framework behind Scylla.

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