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please ignore...<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>Von:</b> gpfsug-discuss <gpfsug-discuss-bounces@gpfsug.org> im Auftrag von Olaf Weiser <olaf.weiser@de.ibm.com><br>
<b>Gesendet:</b> Donnerstag, 4. Mai 2023 07:14<br>
<b>An:</b> gpfsug main discussion list <gpfsug-discuss@gpfsug.org><br>
<b>Betreff:</b> [EXTERNAL] Re: [gpfsug-discuss] Question about subnets parameter and remote cluster mounts</font>
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Moin Achim, ouch .. Du has' aba Arbeitszeiten .. und ich dachte schon .. meine sind mies 😉 Danke Dir für deine Antwort. . wenn Du heute mal 5 min hast. . ping mich mal an .. . ATOS France hat wohl n ticket bei uns offen ?!? aber kein Stress. . 
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Moin Achim, <br>
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ouch .. Du has' aba Arbeitszeiten .. und ich dachte schon .. meine sind mies 😉 <br>
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Danke Dir für deine Antwort.. wenn Du heute mal 5 min hast.. ping mich mal an ... ATOS France hat wohl n ticket bei uns offen ?!?
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aber kein Stress.. ich hab auch so genug Baustellen .. <br>
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so denne</div>
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(ich hoffe mal für Dich , Du träumst noch süß , während ich das hier schreibe... )
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cheers</div>
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Olaf Weiser<br>
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IBM Systems, SpectrumScale Client Adoption<br>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>Von:</b> gpfsug-discuss <gpfsug-discuss-bounces@gpfsug.org> im Auftrag von Achim Rehor <Achim.Rehor@de.ibm.com><br>
<b>Gesendet:</b> Donnerstag, 4. Mai 2023 00:00<br>
<b>An:</b> leonardo.sala@psi.ch <leonardo.sala@psi.ch><br>
<b>Cc:</b> gpfsug-discuss@gpfsug.org <gpfsug-discuss@gpfsug.org><br>
<b>Betreff:</b> [EXTERNAL] Re: [gpfsug-discuss] Question about subnets parameter and remote cluster mounts</font>
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<div class="x_PlainText">Dear Leonardo,<br>
<br>
you will find a description in the Concepts, Planning, and Installation<br>
Guide in the GPFS daemon communication section, explaining how the<br>
startup mechanism works. <br>
The Administration Guide contains an explanation on MROTs specifics for<br>
the subnets usage (Chapter 17 in the 5.1.7. version) <br>
Chapter 33 focuses on remote cluster mounts and contains examples.<br>
<br>
Basically, the node join triggers the compare and the matching, thus a<br>
client clusters node uses it's subnets configuration (including the<br>
remote clusters clustername) to initiate the connection. <br>
On the storage cluster you can also diffentiate your existing subnets<br>
for use with separate remote mounting clusters. I would recommend still<br>
to do it on both, just to be precise. <br>
<br>
Initially the idea (as can be seen in the examples in Chapter 33) was<br>
to force the daemon communication to the storage NSD servers to use the<br>
'high speed' network, rather than the lower bandwidth common admin<br>
network. <br>
<br>
<br>
-- <br>
Mit freundlichen Grüßen / Kind regards<br>
<br>
Achim Rehor<br>
<br>
Technical Support Specialist S​pectrum Scale and ESS (SME)<br>
Advisory Product Services Professional<br>
IBM Systems Storage Support - EMEA<br>
<br>
Achim.Rehor@de.ibm.com +49-170-<br>
4521194 <br>
IBM Deutschland GmbH <br>
<br>
<br>
-----Original Message-----<br>
From: Leonardo Sala <leonardo.sala@psi.ch><br>
To: gpfsug main discussion list <gpfsug-discuss@gpfsug.org>, Achim<br>
Rehor <Achim.Rehor@de.ibm.com><br>
Subject: [EXTERNAL] Re: [gpfsug-discuss] Question about subnets<br>
parameter and remote cluster mounts<br>
Date: Wed, 03 May 2023 16:58:12 +0200<br>
<br>
Dear Achim, thanks! My point is: in case of a remote cluster mount,<br>
e. g. CL2 mounting CL1 storage, where should I specify the subnets<br>
parameter: 1) on CL2 (client cluster) 2) on CL1 (storage cluster) 3) on<br>
both CL1 and CL2 I might have to change<br>
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.pfptPrimaryButtonzu381sx:focus { background-color: #b4c1c7 !important; } .pfptPrimaryButtonzu381sx:active { background-color: #90a4ae !important; }Dear Achim,<br>
thanks! My point is: in case of a remote cluster mount, e.g. CL2<br>
mounting CL1 storage, where should I specify the subnets parameter:<br>
1) on CL2 (client cluster)<br>
2) on CL1 (storage cluster)<br>
3) on both CL1 and CL2<br>
I might have to change this parameter on a production system, and as it<br>
needs a restart I would like to be sure I change it only where<br>
necessary<br>
Thanks again!<br>
cheers<br>
leo<br>
Paul Scherrer Institut<br>
Dr. Leonardo Sala<br>
Group Leader Data Analysis and Research Infrastructure<br>
Deputy Department Head a.i Science IT Infrastructure and Services department<br>
Science IT Infrastructure and Services department (AWI)<br>
WHGA/036<br>
Forschungstrasse 111<br>
5232 Villigen PSI<br>
Switzerland<br>
<br>
Phone: +41 56 310 3369<br>
leonardo.sala@psi.ch<br>
www.psi.ch<br>
On 5/3/23 16:40, Achim Rehor wrote:<br>
<br>
> correct, there is no need to put client and storage into different<br>
> subnets, <br>
> and it is also not necessary to specify the subnet parameter at all,<br>
> when they share the same network. <br>
> <br>
> The subnets parameter is very helpful, though, if you are using<br>
> multiple networks, and want to use specific ones for communication with<br>
> one or the other remote cluster.<br>
> <br>
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