Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Aug 4, 2010, at 9:12 AM, Steve Thompson wrote: > New to DRBD; using it with two Dell PE2900 systems, CentOS 5.5 64- > bit. Two questions: > > (1) I am using dual back-to-back gigabits with mtu=9000 for > replication with bonding in balance-rr mode with no issues. The > documentation suggests that active-backup mode be used. I'm getting > an iperf performance across this link of 1.97 Gbits/sec, and a drbd > sync of a single volume gets about 133 MB/sec, which is just a hair > quicker than bonnie++ tells me that this file system can block- > write. I'm interested in why the active-backup recommendation, and > other folks' experiences with bonding. I recall seeing a lot of dropped packets when doing drbd replication over bonded crossover cables in balance-rr mode. Things were fine under normal circumstances, and drops showed up when I really loaded the primary. active-backup gave me enough throughput, so I switched. That was on HP DL380s with Centos 5.5. I don't recall which ethernet driver was in use. alex