gh-ost ☆
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Description:
Triggerless online schema migration solution for MySQL
Type: Formula  |  Tracked Since: Dec 28, 2025
Links: Homepage  |  formulae.brew.sh
Category: Databases
Tags: mysql migration database schema online gh-ost
Install: brew install gh-ost
About:
GhOst is a triggerless online schema migration solution for MySQL. It intercepts and parses the MySQL binary log to apply schema changes without using triggers, ensuring low impact on primary database performance. This tool enables developers to alter tables on live systems without locking or replication lag.
Key Features:
  • Triggerless operation using binary log parsing
  • Pauses and resumes migrations dynamically
  • Built-in verification and throttling mechanisms
  • Supports interactive and batch modes
Use Cases:
  • Adding or modifying columns in large production tables
  • Rebuilding tables to optimize performance without downtime
  • Migrating schema changes on read-heavy replicas
Alternatives:
  • pt-online-schema-change – Percona Toolkit's OSC uses triggers and can impact performance on high-write systems.
  • Liquibase – General-purpose database migration tool, not specialized for MySQL online schema changes.
Version History
Detected Version Rev Change Commit
Oct 9, 2025 5:07pm 0 VERSION_BUMP e7eaa09f
Sep 11, 2025 12:33pm 0 VERSION_BUMP b925e85a
Jan 1, 2025 3:22pm 0 NEW 15b3d0bc
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