Redis Sync

Simple tool to replicate one Redis to another.

Download Binary or Build

You can find binaries for all major platforms under Releases

Alternatively you can build from source using the following command:

go get -u . && go build ./...

How do I use it?

Usage of redis-sync:
  -read-concurrency int
    	source Redis read concurrency (default 10)
  -replace
    	replace existing keys on target
  -source string
    	source Redis host (default localhost:6379) (default "redis://127.0.0.1:6379")
  -source-database int
    	source Redis DB (default 0)
  -target string
    	target Redis database
  -target-database int
    	target Redis DB (default 0)
  -write-concurrency int
    	target Redis write concurrency (default 10)
  -sync-ttl
    	copy TTL times (default false)

Example

# Sync local redis db 0 to remote Redis db 0
redis-sync --target redis://username:[email protected]:6397

How does it work?

By default, redis-sync will call SCAN on the source Redis and iteratively DUMP and RESTORE those keys in the target Redis in batches.

Limitations

• Since SCAN is used an active Redis can result in an inconsistent replica. It is recommended that writes (and probably reads) should be disabled before attempting to sync.
• Since DUMP is used, the serialized value does not contain expire information. You can read more about this limitation in the Redis Docs