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https://github.com/ceph/ceph
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72 lines
1.9 KiB
ReStructuredText
72 lines
1.9 KiB
ReStructuredText
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==================================================================================
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rbd-replay-many -- replay a rados block device (RBD) workload on several clients
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==================================================================================
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.. program:: rbd-replay-many
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Synopsis
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========
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| **rbd-replay-many** [ *options* ] --original-image *name* *host1* [ *host2* [ ... ] ] -- *rbd_replay_args*
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Description
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===========
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**rbd-replay-many** is a utility for replaying a rados block device (RBD) workload on several clients.
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Although all clients use the same workload, they replay against separate images.
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This matches normal use of librbd, where each original client is a VM with its own image.
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Configuration and replay files are not automatically copied to clients.
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Replay images must already exist.
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Options
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=======
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.. option:: --original-image name
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Specifies the name (and snap) of the originally traced image.
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Necessary for correct name mapping.
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.. option:: --image-prefix prefix
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Prefix of image names to replay against.
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Specifying --image-prefix=foo results in clients replaying against foo-0, foo-1, etc.
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Defaults to the original image name.
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.. option:: --exec program
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Path to the rbd-replay executable.
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.. option:: --delay seconds
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Delay between starting each client. Defaults to 0.
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Examples
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========
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Typical usage::
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rbd-replay-many host-0 host-1 --original-image=image -- -c ceph.conf replay.bin
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This results in the following commands being executed::
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ssh host-0 'rbd-replay' --map-image 'image=image-0' -c ceph.conf replay.bin
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ssh host-1 'rbd-replay' --map-image 'image=image-1' -c ceph.conf replay.bin
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Availability
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============
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**rbd-replay-many** is part of the Ceph distributed storage system. Please refer to
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the Ceph documentation at http://ceph.com/docs for more information.
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See also
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========
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:doc:`rbd-replay <rbd-replay>`\(8),
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:doc:`rbd <rbd>`\(8)
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