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.
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 startup.
- -m monaddress[:port]
Connect to specified monitor (instead of looking through ceph.conf).
- --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
- 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 files.
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 http://ceph.com/docs for more information.
2010-2021, Inktank Storage, Inc. and contributors. Licensed under Creative Commons Attribution Share Alike 3.0 (CC-BY-SA-3.0)