Messages in this thread | | | Date | Fri, 24 Aug 2001 08:19:50 -0700 | From | Ben Greear <> | Subject | Re: Poor Performance for ethernet bonding |
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Andi Kleen wrote: > > Bernhard Busch <bbusch@biochem.mpg.de> writes: > > > Hi > > > > > > I have tried to use ethernet network interfaces bonding to increase > > peformance. > > > > Bonding is working fine, but the performance is rather poor. > > FTP between 2 machines ( kernel 2.4.4 and 4 port DLink 100Mbit ethernet > > card) > > results in a transfer rate of 3MB/s). > > > > Any Hints? > > Bonding reorders packets, which causes frequent retransmits and stalls in TCP. > One setup that doesn't is multipath routing (ip route .. with multiple > nexthops over different interfaces). It'll only load balance (srcip, dstip,tos) > tuples though, not individual flows, but then it has the advantage that > it actually works.
Couldn't the bonding code be made to distribute pkts to one interface or another based on a hash of the sending IP port or something? Seems like that would fix the reordering problem for IP packets.... It wouldn't help for a single stream, but I'm guessing the real world problem involves many streams, which on average should hash such that the load is balanced...
Ben
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-- Ben Greear <greearb@candelatech.com> <Ben_Greear@excite.com> President of Candela Technologies Inc http://www.candelatech.com ScryMUD: http://scry.wanfear.com http://scry.wanfear.com/~greear - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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