Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Thursday 20 May 2010 20:15:36 Lee Riemer wrote: > Do you need multiple destination IPs to properly balance? It is my > understanding that a single stream will only traverse a single link. > Hence the MPIO requirement. > > On 5/20/2010 1:07 PM, Bart Coninckx wrote: > > Hi, > > > > Admittedly not a DRBD issue per se, but I guess this list represents > > quite some experience in the area: I have two gigabit NICs bonded in > > balance-rr mode for DRBD sync. They are directly linked (no switch) to > > the other other pair in the other DRBD node. > > > > Before syncing things I was testing the performance and failover. Netperf > > shows for instance this: > > > > > > iscsi2:/etc/sysconfig/network # netperf -p 2222 -H 10.0.2.3 > > TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 10.0.2.3 > > (10.0.2.3) port 0 AF_INET > > Recv Send Send > > Socket Socket Message Elapsed > > Size Size Size Time Throughput > > bytes bytes bytes secs. 10^6bits/sec > > > > 87380 16384 16384 10.00 977.83 > > > > > > Pulling one cable gives me about the same speed. I would expect it to be > > at least 20% slower. It seems the round robin does not speed up things. > > > > The bonds on both sides show up fine in /proc/net/bonding/bond0. > > > > Anyone any idea what I'm doing wrong? > > > > Cheers, > > > > > > Bart > > _______________________________________________ > > drbd-user mailing list > > drbd-user at lists.linbit.com > > http://lists.linbit.com/mailman/listinfo/drbd-user > > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user > Lee, do I understand you correctly that the speed gain will only be noticeable with balance-rr when I have multiple IP's on the destination bonding interface? If so, how does DRBD benefit from this? I can only set one IP address for a resource (or at least so I believed). Cheers, Bart