Large Hadron Migrator
safe-pg-migrations
Our great sponsors
| Large Hadron Migrator | safe-pg-migrations | |
|---|---|---|
| 3 | 6 | |
| 1,816 | 476 | |
| 0.5% | 1.5% | |
| 0.0 | 8.4 | |
| 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 There is https://github.com/soundcloud/lhm but it's pretty much outdated nowadays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
safe-pg-migrations
- Show HN: safe-pg-migrations, ActiveRecord migrations for Postgres made safe
- Gérer ses migrations sans downtime
- Show HN: Zero-downtime PostgreSQL migrations for Ruby on Rails
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Database... or Goose?
ps. the gem being showcased here is https://github.com/doctolib/safe-pg-migrations
At Doctolib, we developed safe-pg-migrations, a tool which automatically makes migrations safe. In 2018, we open-sourced this library. From an internal solution developed by our team only, it is now used on other projects, and even received contribution from external authors.
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Release a new gem version
At Doctolib, we proudly maintain and develop the gem safe-pg-migrations, which makes migrations safer. Once in a while, after each relevant updates, we release a new version.
What are some alternatives?
Squasher - Squasher - squash your old migrations in a single command
strong_migrations - Catch unsafe migrations in development
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.
migration_signature - Generate signatures for Rails migration files when they are run and check them in CI.
Foreigner - Adds foreign key helpers to migrations and correctly dumps foreign keys to schema.rb
pg-osc - Easy CLI tool for making zero downtime schema changes and backfills in PostgreSQL
BatchLoader - :zap: Powerful tool for avoiding N+1 DB or HTTP queries
online_migrations - Catch unsafe PostgreSQL migrations in development and run them easier in production (code helpers for table/column renaming, changing column type, adding columns with default, background migrations, etc).
PgHero - A performance dashboard for Postgres
ghost_adapter - Run ActiveRecord migrations through gh-ost
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.
flipper - 🐬 Beautiful, performant feature flags for Ruby.