Ceph » RADOS

Dan Mick wrote:

rados bench read has been replaced with "seq" and "rand", the latter of which is
still unimplemented, and since "bench write" now cleans up after itself,
the command has grown a --no-cleanup option; these need to be added.

I think this ticket can be closed. The rados bench command has been documented per Dan's request.

See: http://docs.ceph.com/docs/master/man/8/rados/#pool-specific-commands

bench seconds mode [ -b objsize ] [ -t threads ]
Benchmark for seconds. The mode can be write, seq, or rand. seq and rand are read benchmarks, either sequential or random. Before running one of the reading benchmarks, run a write benchmark with the –no-cleanup option. The default object size is 4 MB, and the default number of simulated threads (parallel writes) is 16. The –run-name <label> option is useful for benchmarking a workload test from multiple clients. The <label> is an arbitrary object name. It is “benchmark_last_metadata” by default, and is used as the underlying object name for “read” and “write” ops. Note: -b objsize option is valid only in write mode. Note: write and seq must be run on the same host otherwise the objects created by write will have names that will fail seq.