On Feb 21, 2012, at 12:40 PM, Gregory Farnum wrote: > On Tue, Feb 21, 2012 at 12:25 PM, Noah Watkins <[email protected]> wrote: > > That's pretty much expected. -t is not actually controlling the number > of threads, but the number of requests the rados tool will dispatch at > a time. With -t 1 you're telling it to send a single request, wait for > it to commit, then dispatch another request. (ie, latency bound) With > -t 10 you are dispatching 10 requests and dispatching a new one > whenever one of those comes back. (ie, mostly bandwidth bound)
Makes sense, thanks. So the bottleneck is very sneaky. > -Greg -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
