[Lustre-discuss] Problems with lustre router setup IB <-> TCP
Thomas Roth
t.roth at gsi.de
Fri Dec 23 07:34:10 PST 2011
Hi Markus,
I have a working test setup of this, seems it just depends on having the
correct modprobe-confs for the involved machines.
On the MDS/OSS we have /etc/modprobe.d/lustre.conf with
> options lnet networks=o2ib0(ib0) routes="tcp1 192.168.0.[3-4]@o2ib0"
dead_router_check_interval=300
where 192.168.0.[3-4] are the (IBo)IPs of the two LNET-routers we installed.
On the LNET-router box, we have
> options lnet forwarding="enabled"
> options lnet accept=all
> options lnet networks="o2ib0(ib0),tcp1(eth0)" accept_timeout=15
And on the clients in the ethernet part, we have
> options lnet networks=tcp1(eth0) routes="o2ib 10.1.1.[15,18]@tcp1"
dead_router_check_interval=300
where 10.1.1.[15,18] are the IPs of the LNET routers on the ethernet side.
Cheers,
Thomas
On 12/19/2011 02:46 PM, Markus Kirsch wrote:
> Hello,
>
>
>
> I have a big problem finding an example how to setup a lustre-router.
>
> Maybe someone can direct me to the right direction.
>
>
>
> Inside the server room we have a lustre storage system with 1 combined
> MDS/OSS node and 3 OSS nodes.
>
> Around 100 compute nodes connect to this lustre storage over IB. So
> right now all lnet communication is done
>
> over IB. We have to connect now a small number of workstations outside
> the server room to the lustre storage system.
>
> I would prefer to do this with a lustre router, instead of enabling
> communication for the whole system over IB and TCP.
>
>
>
>
> ##################################################
> # server room #
> # +---------+ #
> # | MDS/OSS | #
> # +---------+ #
> # | OSS |\ #
> +-------------+
> # +---------+ \ # |
> workstation |
> # | OSS | \ #
> /+-------------+
> # +---------+ \+-----------+ +--------+ # +------------+/
> # | OSS | | IB-switch |--IB--| router |--TCP--| TCP-switch |
> # +---------+ /+-----------+ +--------+ # +------------+\
> # / #
> \+-------------+
> # +---------+ / # |
> workstation |
> # | clients |/ #
> +-------------+
> # +---------+ #
> # #
> ##################################################
>
> Markus Kirsch
> Consulting
>
> ict ag - Aachen
> information · communication · technology
> a Fujitsu Company
> Kackertstraße 20
> 52072 Aachen
> www.ictag.net
> www.hpcline.de
> www.ictag-shop.de
>
> Tel: +49 241 88949 156
> Fax: +49 241 88949 110
> Mobil: +49 177 88949 22
> Mail: mak at ictag.net
>
>
>
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Thomas Roth
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