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wtf is scylla?

joeloser/scylla — explained in plain English

Analysis updated 2026-07-18 · repo last pushed 2020-10-28

Audience · developerComplexity · 5/5DormantSetup · hard

TL;DR

A high-speed database compatible with Cassandra and DynamoDB, built to handle massive data workloads with fewer servers.

Mindmap

mindmap
  root((scylla))
    What it does
      Stores huge data fast
      Cassandra compatible
      DynamoDB compatible
    Tech stack
      C++
      Seastar
      Docker
    Use cases
      Real-time analytics
      High-traffic SaaS
      Mobile app backend
    Audience
      Engineering teams
    Performance
      Shared-nothing design
      Per-core work queues

Code map

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Why would anyone build with this?

REASON 1

Replace a Cassandra or DynamoDB deployment without rewriting application code.

REASON 2

Handle millions of requests per second for a real-time analytics platform.

REASON 3

Run a high-traffic SaaS backend on fewer servers than a traditional database needs.

REASON 4

Power a mobile app backend that needs fast, large-scale data lookups.

What's in the stack?

C++SeastarDocker

How it stacks up

joeloser/scylla0verflowme/alarm-clock0verflowme/seclists
Language—CSS—
Last pushed2020-10-282022-10-032020-05-03
MaintenanceDormantDormantDormant
Setup difficultyhardeasyeasy
Complexity5/52/51/5
Audiencedevelopervibe coderops devops

Figures from each repo's GitHub metadata at analysis time.

How do you spin it up?

Difficulty · hard Time to first run · 1day+

Requires a modern C++ compiler and a carefully configured build environment, a frozen Docker toolchain is provided to simplify this.

Yoink these prompts

Prompt 1
Explain how Scylla's shared-nothing design speeds up database performance.
Prompt 2
Help me set up Scylla's frozen toolchain Docker image to build the project.
Prompt 3
Walk me through migrating an existing Cassandra application to Scylla.
Prompt 4
What free training resources does the Scylla project offer for learning how to deploy it?

Frequently asked questions

wtf is scylla?

A high-speed database compatible with Cassandra and DynamoDB, built to handle massive data workloads with fewer servers.

Is scylla actively maintained?

Dormant — no commits in 2+ years (last push 2020-10-28).

How hard is scylla to set up?

Setup difficulty is rated hard, with roughly 1day+ to a first successful run.

Who is scylla for?

Mainly developer.

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