rbd-replay - Man Page

replay rados block device (RBD) workloads


rbd-replay [ options ] replay_file


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


-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'.


Multiplies inter-request latencies.  Default: 1.


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.


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.


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


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(8)

Referenced By

rbd-replay-many(8), rbd-replay-prep(8).

Mar 19, 2024 dev Ceph