[CentOS] Bonding performance question
James Pearson
james-p at moving-picture.com
Tue Jan 11 16:23:37 UTC 2011
lhecking at users.sourceforge.net wrote:
>>I guess you need to look at the bonding src code - looks like it is in
>>drivers/net/bonding/bond_main.c - for CentOS 5 it is:
>
>
> C xor is bitwise.
>
> I did a bit of scripting and found that the algorithm seems much more
> sensitive to port numbers than IP addresses. Not that iperf gives much
> control over those, it looks like the client port numbers are picked at
> random. As a result, I would expect to repeat this test on the same set
> of clients, say, hundreds of times, and maybe find a small number of
> cases where all interfaces are utilised.
You could use xmit_hash_policy=layer2+3 - which just uses MAC and IP
addresses (which you do have more control over) - and see if you can
pick a mix of IP/MAC addresses that would result in all four interfaces
being used (theoretically) - and see if it matches reality?
James Pearson
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