Adding upstream version 14.2.21.upstream/14.2.21upstream

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

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+
+===============================================
+ ceph-syn -- ceph synthetic workload generator
+===============================================
+
+.. program:: ceph-syn
+
+Synopsis
+========
+
+| **ceph-syn** [ -m *monaddr*:*port* ] --syn *command* *...*
+
+
+Description
+===========
+
+**ceph-syn** is a simple synthetic workload generator for the Ceph
+distributed file system. It uses the userspace client library to
+generate simple workloads against a currently running file system. The
+file system need not be mounted via ceph-fuse(8) or the kernel client.
+
+One or more ``--syn`` command arguments specify the particular
+workload, as documented below.
+
+
+Options
+=======
+
+.. option:: -d
+
+   Detach from console and daemonize after startup.
+
+.. option:: -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.
+
+.. option:: -m monaddress[:port]
+
+   Connect to specified monitor (instead of looking through
+   ``ceph.conf``).
+
+.. option:: --num_client num
+
+   Run num different clients, each in a separate thread.
+
+.. option:: --syn workloadspec
+
+   Run the given workload. May be specified as many times as
+   needed. Workloads will normally run sequentially.
+
+
+Workloads
+=========
+
+Each workload should be preceded by ``--syn`` on the command
+line. This is not a complete list.
+
+:command:`mknap` *path* *snapname*
+  Create a snapshot called *snapname* on *path*.
+
+:command:`rmsnap` *path* *snapname*
+  Delete snapshot called *snapname* on *path*.
+
+:command:`rmfile` *path*
+  Delete/unlink *path*.
+
+:command:`writefile` *sizeinmb* *blocksize*
+  Create a file, named after our client id, that is *sizeinmb* MB by
+  writing *blocksize* chunks.
+
+:command:`readfile` *sizeinmb* *blocksize*
+  Read file, named after our client id, that is *sizeinmb* MB by
+  writing *blocksize* chunks.
+
+:command:`rw` *sizeinmb* *blocksize*
+  Write file, then read it back, as above.
+
+:command:`makedirs` *numsubdirs* *numfiles* *depth*
+  Create a hierarchy of directories that is *depth* levels deep. Give
+  each directory *numsubdirs* subdirectories and *numfiles* files.
+
+:command:`walk`
+  Recursively walk the file system (like find).
+
+
+Availability
+============
+
+**ceph-syn** 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:`ceph <ceph>`\(8),
+:doc:`ceph-fuse <ceph-fuse>`\(8)