Squasher
Large Hadron Migrator
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| Squasher | Large Hadron Migrator | |
|---|---|---|
| 0 | 3 | |
| 1,445 | 1,806 | |
| - | 0.1% | |
| 0.0 | 0.0 | |
| 29 days ago | 3 months ago | |
| Ruby | Ruby | |
| MIT License | BSD 3-clause "New" or "Revised" License |
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Squasher
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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 There is https://github.com/soundcloud/lhm but it's pretty much outdated nowadays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?
Database Cleaner - Strategies for cleaning databases in Ruby. Can be used to ensure a clean state for testing.
PgHero - A performance dashboard for Postgres
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.
Polo - Polo travels through your database and creates sample snapshots so you can work with real world data in development.
Foreigner - Adds foreign key helpers to migrations and correctly dumps foreign keys to schema.rb
BatchLoader - :zap: Powerful tool for avoiding N+1 DB or HTTP queries
QueryTrack - Find time-consuming database queries for ActiveRecord-based Rails Apps
Redis Dashboard - Sinatra app to monitor Redis servers.
Rails DB - Rails Database Viewer and SQL Query Runner
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.