[Lustre-discuss] tcp network load balancing understanding lustre 1.8

[Isaac Huang]

On Thu, May 07, 2009 at 03:02:49PM -0700, Klaus Steden wrote:
> ......
> I didn't even touch Lustre bonding, because as you both remark, it's a
> little convoluted. I spent a lot of time experimenting with Lustre over
> 802.3ad (LACP) aggregated links using the Linux bonding driver, and my OSS
> nodes produced very respectable to very good numbers. Across a pair of OSS
> nodes each with 2 x GigE NICs, I was able to sustain ~ 350 MB/s write speed
> when running sandbox tests, so it appears that although the LACP driver
> doesn't balance a connection across multiple links (i.e. a 2 GigE LACP bond
> doesn't give you 2 Gbit throughput for a single network I/O), the Lustre
> implementation somehow manages to squeeze more data through the pipe.

Probably because the Lustre TCP driver creates multiple connections
between two end points, for different types of data.

Thanks,
Isaac