On Sun, Nov 13, 2011 at 5:18 AM, Bill Boas <bboas@xxxxxxxxxxxxxxxxxxxxx> wrote: > At SC we are running a video streaming demo across a 7000 mile fiber > distance using IB extension boxes from Bay Microsystems at 40 Gbps. The > video streaming app uses SRP to transmit the streams across this long > distance link. Performance is not all what we would have hoped. We think > that because SRP uses RC mode between initiator and target that it is the RC > behavior over this distance that is impacting performance. Are any of you > aware of an SRP implementation that uses UC mode. What numbers are reported by ib_write_bw and ib_write_lat for that IB link ? Do these numbers match the bandwidth and latency requirements of the video playback application ? Which operating system was the initiator system running ? How was read-ahead configured ? I'm not sure it would be a good idea to try to run SRP over UC. Bart. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
