Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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