Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
> Discover the latency for 1 block sized packet of data to travel from one > host to another, say for a 4k packet. > > 24 packets transmitted, 24 received, 0% packet loss, time 23022ms > rtt min/avg/max/mdev = 0.164/0.226/0.290/0.038 ms, pipe 2 > This is because each 4k io operation, the standard for file system > operations, needs to travel across the network. > Thanks for sharing this. If this proves to be useful, please include this in the drbd documentation under section e.g.: expectations. When I apply these to our cross linked e1000's: IOPS=3558 at 15MB/s. Why does normal O_SYNC i/o on ext3 using 0.7.23 top this by a factor 5 or more? I thought 0.7.x did uses small bio's.