Let’s Play Master and Servant: Real Time Synchronization Tool for Redis Migration

The text discusses a challenge faced by users migrating their sharded Redis backend with minimal application downtime. It explains that traditional backup and restore mechanisms require the database to be stopped, which is unsuitable for some use cases. An alternative approach using database replication is introduced as a solution, reducing downtime to a minimum. The text then describes a tool called "redis-migrate" developed by the author's team to simplify this process. This Python script provides real-time information on replication status and guides users through each step of migration.