From: Yann Droneaud <ydroneaud-RlY5vtjFyJ3QT0dZR+AlfA@public.gmane.org>
To: Gandalf Corvotempesta
<gandalf.corvotempesta-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: "Hefty,
Sean" <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
"linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: rsockets addressing
Date: Mon, 16 Sep 2013 22:00:57 +0200 [thread overview]
Message-ID: <1379361657.2476.11.camel@localhost.localdomain> (raw)
In-Reply-To: <CAJH6TXj=8OeavwyRHEaEBE=UUN0hyQGdTXh3iJiD7Ot7tnEqFA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
Hi,
Le lundi 16 septembre 2013 à 18:31 +0200, Gandalf Corvotempesta a
écrit :
> 2013/9/16 Yann Droneaud <ydroneaud-RlY5vtjFyJ3QT0dZR+AlfA@public.gmane.org>:
> > You have to use InfiniBand port bonding to benefit from fail-over (through
> > APM: Automatic Path Migration ?)
> >
> > http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/networking/bonding.txt
>
> IB boinding is exactly what I would like to do but I have some questions:
>
> 1. is the ISL supported? I've seen that is not suggested to
> interconnect two IB switches (and I don't know why)
> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/networking/bonding.txt#n1967
> Without ISL and using two different IB switches, one port failure will
> result in the whole node down because there is no other active path to
> the primary switch
> This would be good in my environment by I prefere to get a real failover.
>
The InfiniBand fabrics support "ISL" ... indeed.
InfiniBand fabrics support more complicated network topology than
(plain) Ethernet: that's why there's (at least) one Subnet Manager,
while Ethernet struggle with Spanning Tree ...
You definitely need link between switches if you want to use a "high
availability" fabric topology with HCA ports connected to differents
switches. (additionally, a switch should have a link to two others
switches ... then it's starting to be complicated, since you have to
design your fabric topology to match the communication pattern / data
locality used by your application ...).
> 2. can I use active-active mode like standard ethernet bonding with
> some sort of balancing?
> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/networking/bonding.txt#n2127
AFAIK, IPoIB bonding doesn't support "active-active" bonding.
Only high availability is provided. Link aggregate is not supported.
Regards.
--
Yann Droneaud
OPTEYA
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next prev parent reply other threads:[~2013-09-16 20:00 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-16 13:25 rsockets addressing Gandalf Corvotempesta
[not found] ` <CAJH6TXhY---UhpvsquYrNXBc5ji_hYp7zJ+CwRrfy-naM_aGaA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-09-16 15:44 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A8237388CC0B81-P5GAC/sN6hkd3b2yrw5b5LfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2013-09-16 15:59 ` Gandalf Corvotempesta
[not found] ` <CAJH6TXgHZpyMgDzFG9pUKvkJyxybjBFsTPNHGxvbQUJ76XtJuQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-09-16 16:17 ` Yann Droneaud
[not found] ` <a87f274640d3a8bcfa70579668edba2c-zgzEX58YAwA@public.gmane.org>
2013-09-16 16:31 ` Gandalf Corvotempesta
[not found] ` <CAJH6TXj=8OeavwyRHEaEBE=UUN0hyQGdTXh3iJiD7Ot7tnEqFA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-09-16 20:00 ` Yann Droneaud [this message]
[not found] ` <1379361657.2476.11.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2013-09-16 20:41 ` Gandalf Corvotempesta
[not found] ` <CAJH6TXiEEsx01j1PbWVi7EyAW=MH0vj0j=cRMnA_tcy+rGjQ0Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-09-17 9:41 ` Yann Droneaud
[not found] ` <56ea23e8dda74a3f5bc0c215dd58f825-zgzEX58YAwA@public.gmane.org>
2013-09-17 10:06 ` Gandalf Corvotempesta
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