square/shift

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735
Rank 61,652 (Top 2 %)
Language
Ruby
License
Apache License 2.0
Created almost 9 years ago
Updated over 1 year ago

square/shift

square

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shift is an application that helps you run schema migrations on MySQL databases

shift

shift is an application that makes it easy to run online schema migrations for MySQL databases

Who should use it?

shift was designed to solve the following problem - running schema migrations manually takes too much time. As such, it is most effective when schema migrations are taking up too much of your time (ex: for an operations or DBA team at a large organization), but really it can be used by anyone. As of writing this, shift has had no problem running hundreds of migrations a day or running migrations that take over a week to complete.

Features

safe, online schema changes (invokes the tried-and-true pt-online-schema-change)
- supports all "ALTER TABLE...", "CREATE TABLE...", or "DROP TABLE..." ddl
a ui where you can see the status of migrations and run them with the click of a button
self-service - out of the box, any user can file and run migrations, and an admin is only required to approve the ddl (this is all configurable though)
shard support - easily run a single migration on any number of shards

Components

shift consists of 3 components. Each component has its own readme with more details

ui: a rails app where you can file, track, and run database migrations
runner: a go agent that consumes jobs from an api exposed by the ui
pt-osc patch: a patch for pt-online-schema-change from the percona toolkit

Demo

Watch a demo video here

Installation

Read the installation guide here

License

Copyright (c) 2016 Square Inc. Distributed under the Apache 2.0 License. See LICENSE file for further details.

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