NFS over LAGG / lacp poor performance

[Steven Hartland]

----- Original Message ----- 
From: "Robert Blacquiere" <freebsd-net at blacquiere.nl>
> Hi Marek,
> 
> On Fri, Apr 25, 2014 at 09:48:36AM +0200, Marek Salwerowicz wrote:
>> Hi list,
>> 
> <snip>
>> Both boxes are  connected to the same switch (HP 1910-48G)
>> 
>> I need to transfer around 10 TB of data from storage1 to storage2
>> I obeserve that during copying, only one NIC (instead of all 4) is used.
>> 
>> Boxes are not stressed during copying
>> 
>> What's more, apart from having 1 NIC saturated (transfer around 120
>> MB/s), I observe transfer rate on level of 70-80 MB/s
> 
> Default lacp 802.3ad works with mac based hashes to loadbalance traffic.
> So single host (mac) will be transfered by one ethernet adaptor as you
> have seen.

In FreeBSD 10 onwards the default is l2,l3 & l4 hash this is not true for
the switch side, so may need to tune the switch.

    Regards
    Steve