Large Hadron Migrator
strong_migrations
| Large Hadron Migrator | strong_migrations | |
|---|---|---|
| 3 | 17 | |
| 1,818 | 3,862 | |
| 0.3% | - | |
| 0.0 | 7.9 | |
| 8 months ago | 12 days ago | |
| Ruby | Ruby | |
| BSD 3-clause "New" or "Revised" License | MIT License |
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Large Hadron Migrator
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GitHub downtime root cause analysis
No you didn't. They're doing what is often referred as "online schema change" using https://github.com/github/gh-ost (but the concept is the same than percona's pt-online-schema-change, or https://github.com/soundcloud/lhm.
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Database... or Goose?
Is there anything similar for MySQL? There is https://github.com/soundcloud/lhm but it's pretty much outdated nowadays
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Do you use migrations for data manipulations? What are the pro's and con's ?
I may do it from the console or a task if I wanted to modify a large number of records, e.g. something in my Users table. I think you need a sense of how long the update will take - I'm not sure if there's any issue with migrations timing out or such like. If I modify my Users schema it takes 5 minutes or so as it has to make a copy of the table and swap it in and that works fine - https://github.com/soundcloud/lhm
strong_migrations
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Careful with That Lock, Eugene
In the Rails world, the gem strong_migrations can be used to detect these: https://github.com/ankane/strong_migrations
The docs include a handy articulation of fixes.
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Must-have gems for mature Rails
gem "strong_migrations" - https://github.com/ankane/strong_migrations | Helps devs write non-blocking migrations, a must-have.
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Migration Best Practice
Frameworks will have a preferred solution. We use Rails with the strong_migrations gem which is great: https://github.com/ankane/strong_migrations
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How does Rails handle out of order migrations (when working on different local branches)
There’s no real way to test, but you can use gems like https://github.com/ankane/strong_migrations and not allow to merge branches unless they are up-to-date with main.
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[AskJS] Is there any alternative to the strong migrations gem?
The strong migrations gem in Rails alerts when you're trying to make a migration that may be dangerous. Does anyone know an alternative for Javascript? Or maybe for raw SQL.
- Adding first and last name to existing app running on Heroku
- Enforcing Zero Downtime Django Migrations
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When Postgres blocks: tips for dealing with locks
Half of the problems in this article are migration related.
I am extremely grateful that some people have created awesome libraries like strong migrations https://github.com/ankane/strong_migrations. Even if you are not using rails, bookmark its readme, it is an awesome cheat-sheet when writing a migration.
- Best practices as code using RuboCop
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Why I Enjoy PostgreSQL – Infrastructure Engineer's Perspective
I would suggest taking a look at strong migrations[1]. It's a rails project, but the readme does a great job explaining what it checks for and what safe alternative to use instead. I still link to their explanations in PRs for non-rails projects.
[1]: https://github.com/ankane/strong_migrations#checks
What are some alternatives?
Squasher - Squasher - squash your old migrations in a single command
safe-pg-migrations - Make your PostgreSQL migrations safe
Lol DBA - lol_dba is a small package of rake tasks that scan your application models and displays a list of columns that probably should be indexed. Also, it can generate .sql migration scripts.
phony_rails - This Gem adds useful methods to your Rails app to validate, display and save phone numbers. It uses the super awesome Phony gem (https://github.com/floere/phony).
Foreigner - Adds foreign key helpers to migrations and correctly dumps foreign keys to schema.rb
money-rails - Integration of RubyMoney - Money with Rails
BatchLoader - :zap: Powerful tool for avoiding N+1 DB or HTTP queries
lockbox - Modern encryption for Ruby and Rails
PgHero - A performance dashboard for Postgres
data-migrate - Migrate and update data alongside your database structure.
Seedbank - Seedbank gives your seed data a little structure. Create seeds for each environment, share seeds between environments and specify dependencies to load your seeds in order. All nicely integrated with simple rake tasks.
Pagy - 🏆 The Best Pagination Ruby Gem 🥇