On 2012-03-26 00:00, Jiri Horky wrote: > Hi, > > I would like to measure IOPS on a distributed file system from several > hosts in parallel. > I am a bit lost in what options I should use. I would like to have each > host in a cluster accessing its own file to not stress metadata and/or > locking infrastructure. I thought that on all clients, I should run just: > > fio --server > > And from an admin node something like > > fio --client server1 job.desc.1 --client server2 job.desc.2 --client > server3 job.desc.3...., where job.desc.X is specific to the client > (different filename). > > But it seems like each host executes each job file, which is not what I > would like... > I bet there is a way how to accomplish this. Could you please point me > to the right direction? That is/was indeed the intended idea. It's just a parsing issue that causes it to support just one job file across a bunch of hosts, it's not a fio limitation. So it should be relatively easy to fix. Your above incantation ends up being identical to doing: $ fio --client server1 --client server2 --client server3 job1 job2 job3 I can fix this when I get the time, or you can dive into it yourself if you want. It's in init.c:parse_cmd_line(). -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
