|Shiba||Large Hadron Migrator|
|over 2 years ago||over 2 years ago|
|GNU General Public License v3.0 or later||BSD 3-clause "New" or "Revised" License|
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Tracking mentions began in Dec 2020.
Large Hadron Migrator
GitHub downtime root cause analysis
4 projects | reddit.com/r/programming | 3 Dec 2021
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.
Database... or Goose?
4 projects | reddit.com/r/ruby | 28 Jun 2021
Is there anything similar for MySQL? There is https://github.com/soundcloud/lhm but it's pretty much outdated nowadays
Do you use migrations for data manipulations? What are the pro's and con's ?
3 projects | reddit.com/r/rails | 17 Feb 2021
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?
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.
Squasher - Squasher - squash your old migrations in a single command
BatchLoader - :zap: Powerful tool for avoiding N+1 DB or HTTP queries
Foreigner - Adds foreign key helpers to migrations and correctly dumps foreign keys to schema.rb
Database Cleaner - Strategies for cleaning databases in Ruby. Can be used to ensure a clean state for testing.
SecondBase - Seamless second database integration for Rails.
PgDriveBackup - Simple solution to make encrypted with ccrypt PostgreSQL backups and storing on Google Drive API
Blazer - Business intelligence made simple
Upsert - Upsert on MySQL, PostgreSQL, and SQLite3. Transparently creates functions (UDF) for MySQL and PostgreSQL; on SQLite3, uses INSERT OR IGNORE.
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.