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       ceph-syn - ceph synthetic workload generator


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


       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.


       -d     Detach from console and daemonize after startup.

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

       -m monaddress[:port]
              Connect   to  specified  monitor  (instead  of  looking  through

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

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


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

       mknap path snapname
              Create a snapshot called snapname on path.

       rmsnap path snapname
              Delete snapshot called snapname on path.

       rmfile path
              Delete/unlink path.

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

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

       rw sizeinmb blocksize
              Write file, then read it back, as above.

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

       walk   Recursively walk the file system (like find).


       ceph-syn  is  part  of  Ceph,  a   massively   scalable,   open-source,
       distributed  storage  system. Please refer to the Ceph documentation at for more information.


       ceph(8), ceph-fuse(8)


       2010-2014, Inktank  Storage,  Inc.  and  contributors.  Licensed  under
       Creative Commons BY-SA