slack-smart-bot
Large Hadron Migrator
| slack-smart-bot | Large Hadron Migrator | |
|---|---|---|
| - | 3 | |
| 31 | 1,823 | |
| - | 0.4% | |
| 6.9 | 0.0 | |
| 2 months ago | 10 months ago | |
| Ruby | Ruby | |
| MIT License | BSD 3-clause "New" or "Revised" License |
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slack-smart-bot
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Tracking mentions began in Dec 2020.
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 There is https://github.com/soundcloud/lhm but it's pretty much outdated nowadays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
What are some alternatives?
Seed dump - Rails 4/5 task to dump your data to db/seeds.rb
Squasher - Squasher - squash your old migrations in a single command
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.
PgHero - A performance dashboard for Postgres
Foreigner - Adds foreign key helpers to migrations and correctly dumps foreign keys to schema.rb
Rapidity - Simple but fast Redis-backed distributed rate limiter. Allows you to specify time interval and count within to limit distributed operations.
BatchLoader - :zap: Powerful tool for avoiding N+1 DB or HTTP queries
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.
perfect-shape - Perfect Shape is a collection of geometric algorithms that are mostly useful for GUI manipulation like checking containment of a point in popular geometric shapes such as rectangle, square, arc, circle, polygon, and paths containing lines, quadratic bézier curves, and cubic bezier curves. Also, some general math algorithms like IEEE-754 Remainder.