Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
When I do the tests below, my results almost look I'm running a 486! primary (faster, by itself, no drbd involved) ./dm -x -a 0 -s 4g -b 20m -m -y -p -o hello RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRr 28.75 MB/sec (4294967296 B / 02:22.454176) secondary (slower, by itself, no drbd involved) ./dm -x -a 0 -s 4g -b 20m -m -y -p -o hello RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRr 20.77 MB/sec (4294967296 B / 03:17.205593) I am trying to find a live CD that has the Areca driver compiled in. That way I can confirm that the gentoo kernel config is the cause. By the way, I had trouble trying to perform this test on a drbd volume. It complains that it cannot open the output device. And this problem goes away if I leave out the -x switch. > ># /dev/sdc1 (1,5TB) with xfs no drbd > >./dm -x -a 0 -s 4g -b 20m -m -y -p -o /mnt/bonnie/dm >RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRr >239.44 MB/sec (4294967296 B / 00:17.106477) > ># 4,5TB xfs FS, drbd disconnected > >./dm -x -a 0 -s 4g -b 20m -m -y -p -o /mnt/bonnie/dm >RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRr >214.32 MB/sec (4294967296 B / 00:19.111477) > ># 4,5TB xfs FS, drbd connected and in sync > >./dm -x -a 0 -s 4g -b 20m -m -y -p -o /mnt/bonnie/dm >RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRr >98.08 MB/sec (4294967296 B / 00:41.761632) > > >The bonnie++ and tiobench benchmarks are in the same area. In my case, >drbd is mainly limited by the speed of the GbE link. -- Maurice Volaski, mvolaski at aecom.yu.edu Computing Support, Rose F. Kennedy Center Albert Einstein College of Medicine of Yeshiva University