Re: Poor Performance for ethernet bonding

[Ben Greear <greearb@candelatech.com>]

Willy Tarreau wrote:
> 
> Hi Ben,
> 
> > 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...
> 
> You may take a look at this for enhancements to the bonding driver :
> 
>   http://sourceforge.net/projects/bonding/
> 
> The XOR method has been implemented to hash the flows based on the SRC/DST
> MAC addresses.

If you are only hashing on MAC addresses, then you would become highly
un-optimized in the case where a machine is communicating with it's
default gateway primarily.  Perhaps the XOR hash is really more sophisticated??

Ben


> 
> Regards,
> Willy

-- 
Ben Greear <greearb@candelatech.com>          <Ben_Greear@excite.com>
President of Candela Technologies Inc      http://www.candelatech.com
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