Re: SAS HBA LSI 9200-8e supported under 8.2?

Good job Denny,

I am happy to hear you made it work.

On Fri, Mar 25, 2011 at 7:38 AM, Freddie Cash <fjwcash@gmail.com> wrote:

> On Fri, Mar 25, 2011 at 5:28 AM, Denny Schierz <linuxmail@4lin.net> wrote:
> > So, how complicated is load balancing with two Gb Network cards? :-) Ok,
> > that should be a new thread;-)
>
> Simple as pie.  Read through lagg(4) to see how it's done from the
> command-line using ifconfig(8).
>
> ifconfig_lagg0="laggproto round-robin laggport em0 laggport em1 inet
> 192.168.0.1/24"
>

That's actually an interesting problem (although it really belongs to a
different thread).
Freddie, have you tried this with an HP Procurve (say 2910al) switch.
I did and a dual gigabit connection between two machines made the switch
cpu utilization to jump from around 1% to 30%. I guess it might be HP
specific problem due to the enormous mac address bounce between the two
ports. I am curious to know if anybody else has experienced similar
problems?

It's a really important problem to solve since having zpool's that can
achieve
a gigabyte a second transfers makes little sense when you are limited by a
gigabit (120MB/s) network connection to the rest of the world.
Alternative to round-robin is only maybe LACP, but it doesn't really cut it
when
it comes to transfers between two nodes only due to the hashing that LACP
uses. Or maybe 10GbE anyone?

Cheers,

-- 
Rumen Telbizov
http://telbizov.com
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