---
name: "rbd-replay"
section: "8"
platform: "linux"
package: "ceph-common"
version: "18.2.7+ds-1+deb13u1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/rbd-replay"
---

# rbd-replay(8)

replay rados block device (RBD) workloads

## NAME

rbd-replay - replay rados block device (RBD) workloads

## SYNOPSIS

```
rbd-replay [ options ] replay_file
```

## DESCRIPTION

**rbd-replay** is a utility for replaying rados block device (RBD) workloads.

## OPTIONS

- **-c ceph.conf, --conf ceph.conf**

  Use ceph.conf configuration file instead of the default /etc/ceph/ceph.conf to determine monitor addresses during startup.

- **-p pool, --pool pool**

  Interact with the given pool.  Defaults to 'rbd'.

- **--latency-multiplier**

  Multiplies inter-request latencies.  Default: 1.

- **--read-only**

  Only replay non-destructive requests.

- **--map-image rule**

  Add a rule to map image names in the trace to image names in the replay cluster. A rule of image1@snap1=image2@snap2 would map snap1 of image1 to snap2 of image2.

- **--dump-perf-counters**

  **Experimental** Dump performance counters to standard out before an image is closed. Performance counters may be dumped multiple times if multiple images are closed, or if the same image is opened and closed multiple times. Performance counters and their meaning may change between versions.

## EXAMPLES

To replay workload1 as fast as possible:

```
rbd-replay --latency-multiplier=0 workload1
```

To replay workload1 but use test\_image instead of prod\_image:

```
rbd-replay --map-image=prod_image=test_image workload1
```

## AVAILABILITY

**rbd-replay** is part of Ceph, a massively scalable, open-source, distributed storage system. Please refer to the Ceph documentation at *https://docs.ceph.com* for more information.

## SEE ALSO

[*rbd-replay-prep*(8)](/rbd-replay-prep/8.md), [*rbd*(8)](/rbd/8.md)

## COPYRIGHT

2010-2014, Inktank Storage, Inc. and contributors. Licensed under Creative Commons Attribution Share Alike 3.0 (CC-BY-SA-3.0)