Hot sync two Redis servers using dumps.
Branch: master
Clone or download
Latest commit 6ba5846 Nov 12, 2017
Type Name Latest commit message Commit time
Failed to load latest commit information.
assets/images Added rump_logo.svg Nov 28, 2016
.gitignore First commit. Nov 24, 2016 Update contributing guide Dec 13, 2016
LICENSE Add license. Nov 24, 2016 Change github handle Nov 12, 2017 Pre-compile Windows and ARM binaries Dec 6, 2016
rump.go Don't fail on key not found Mar 1, 2017

Hot sync two Redis databases using dumps.


There's no easy way to get/sync data from an AWS ElastiCache Redis cluster.

@bdq: Hey, let's keep our staging Redis containers in sync with our AWS ElastiCache. BGSAVE and copy the .rdb?

@nixtrace: Yeah, awesome, let me try... Nope, not supported.

@bdq: Ah, that's bad. We'll have to set the containers as SLAVEOF?

@nixtrace: That makes sense, doing it... Nope, not supported.

@bdq: WAT. Let's use an open source tool to do the sync?

@nixtrace: Most of them use KEYS to get the keys, we'd DoS our own server.

@bdq: Let's write a script?

@nixtrace: Tried. Bash doesn't like key dumps, Ruby/Python + deps take more space than Redis inside the container.

@bdq and @nixtrace: Let's write it in Go?

Rump is able to transfer keys from an ElastiCache cluster or any Redis server to another Redis server, by only using SCAN, DUMP and RESTORE.


  • Uses SCAN instead of KEYS to avoid DoS your own server.
  • Can sync any key type.
  • Drops the TTL on purpose, since it wouldn't be in sync.
  • Doesn't use any temp file.
  • Uses buffered channels to optimize slow source servers.
  • Uses pipelines to minimize network roundtrips.


# Sync local Redis DB 1 to DB 2.
$ rump -from redis:// -to redis://

# Sync ElastiCache cluster to local.
$ rump -from redis:// -to redis://

# Sync protected ElastiCache via EC2 port forwarding.
$ ssh -L -N &
$ rump -from redis:// -to redis://




  • We use GitHub issues to discuss everything: features, bugs, docs.
  • Before sending a pull request always open an issue.


You can find pre-compiled binaries on the releases page. If you don't see your OS/Arch there, just ask :)





Rump is licensed under the MIT License