ceph-syn - ceph synthetic workload generator

ceph-syn 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.

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

dev                                               May 22, 2025                                       CEPH-SYN(8)

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.

       ceph-syn - ceph synthetic workload generator

-d     Detach from console and daemonize after startup.

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

       -mmonaddress[:port]
              Connect to specified monitor (instead of looking through ceph.conf).

       --num_clientnum
              Run num different clients, each in a separate thread.

       --synworkloadspec
              Run the given workload. May be specified as many times as  needed.  Workloads  will  normally  run
              sequentially.

ceph(8), ceph-fuse(8)

ceph-syn [ -m monaddr:port ] --syn command...

       Each workload should be preceded by --syn on the command line. This is not a complete list.

       mknappathsnapname
              Create a snapshot called snapname on path.

       rmsnappathsnapname
              Delete snapshot called snapname on path.

       rmfilepath
              Delete/unlink path.

       writefilesizeinmbblocksize
              Create a file, named after our client id, that is sizeinmb MB by writing blocksize chunks.

       readfilesizeinmbblocksize
              Read file, named after our client id, that is sizeinmb MB by writing blocksize chunks.

       rwsizeinmbblocksize
              Write file, then read it back, as above.

       makedirsnumsubdirsnumfilesdepth
              Create  a  hierarchy  of  directories  that  is  depth levels deep. Give each directory numsubdirs
              subdirectories and numfiles files.

       walk   Recursively walk the file system (like find).