AOF rewrite process in Redis

Introduction

The AOF rewrite process helps keep the Redis database file small and fast by cleaning up old commands and saving only the current data.

When the AOF file becomes very large and slow to load.

To reduce disk space used by Redis data.

To improve Redis startup time by having a smaller AOF file.

When you want to keep a safe backup of your current database state.

To maintain Redis performance during long running operations.

Syntax

Redis

BGREWRITEAOF

This command runs the AOF rewrite in the background without stopping Redis.

It creates a new, smaller AOF file with only the current data.

Examples

Starts the AOF rewrite process in the background.

Redis

BGREWRITEAOF

Enables AOF persistence and then triggers the rewrite process.

Redis

CONFIG SET appendonly yes
BGREWRITEAOF

Sample Program

This sequence enables AOF, starts the rewrite, and shows persistence info.

Redis

CONFIG SET appendonly yes
BGREWRITEAOF
INFO persistence

Important Notes

The BGREWRITEAOF command does not block Redis, so your database stays available.

If a rewrite is already running, issuing BGREWRITEAOF again will schedule another rewrite after the current one.

AOF rewrite helps reduce file size by removing redundant commands.

Summary

AOF rewrite cleans and compacts the Append Only File to save space.

Use BGREWRITEAOF to start the rewrite without stopping Redis.

This process improves Redis startup speed and disk usage.