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List:       gpfsug-discuss
Subject:    Re: [gpfsug-discuss] Multihomed nodes and failover networks
From:       Simon Thompson <S.J.Thompson () bham ! ac ! uk>
Date:       2018-10-26 14:59:08
Message-ID: B19E7C2E-0295-4A5E-A4A5-08732C0C2219 () bham ! ac ! uk
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Yes ... if the IB network goes down ...

But it's not really fault tolerant, as you need the admin network for token \
management, so you could lose IB and have data fail to the Ethernet path, but not \
lose Ethernet.

And it doesn't (or didn't) fail back to IB when IB come live again, though that might \
have changed with 5.0.2.

Simon

On 26/10/2018, 15:52, "gpfsug-discuss-bounces@spectrumscale.org on behalf of \
xhejtman@ics.muni.cz" <gpfsug-discuss-bounces@spectrumscale.org on behalf of \
xhejtman@ics.muni.cz> wrote:

    On Fri, Oct 26, 2018 at 02:48:48PM +0000, Simon Thompson wrote:
    > If IB is enabled and is setup with verbs, then this is the preferred
    > network. GPFS will always fail-back to Ethernet afterwards, however what you
    > can't do is have multiple "subnets" defined and have GPFS fail between
    > different Ethernet networks.
    
    Does it fail-back to Etherenet even in runtime? I mean, doesn't fail-back
    happen only during mmstartup?
    
    -- 
    Lukáš Hejtmánek
    
    Linux Administrator only because
      Full Time Multitasking Ninja 
      is not an official job title
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