[gpfsug-discuss] How to join GNR nodes to a non-GNR cluster

[Tomer Perry]

Hi,

Actually, I believe that GNR is not a limiting factor here. 
mmexportfs and mmimportfs ( man mm??portfs) will export/import GNR 
configuration as well:
"If the specified file system device is a IBM Spectrum Scale RAID-based 
file system, then all affected IBM Spectrum Scale RAID objects will be 
exported as well. This includes recovery groups, declustered arrays, 
vdisks, and any other file systems that are based on these objects. For 
more information about IBM Spectrum Scale RAID, see IBM Spectrum 
Scale RAID: Administration. "

OTOH, I suspect that due to the version mismatch, it wouldn't work - since 
I would assume that the cluster config version is to high for the NetApp 
based cluster.
I would also suspect that the filesystem version on the ESS will be 
different.


Regards,

Tomer Perry
Scalable I/O Development (Spectrum Scale)
email: tomp at il.ibm.com
1 Azrieli Center, Tel Aviv 67021, Israel
Global Tel:    +1 720 3422758
Israel Tel:      +972 3 9188625
Mobile:         +972 52 2554625




From:   "Olaf Weiser" <olaf.weiser at de.ibm.com>
To:     gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Date:   03/12/2019 16:54
Subject:        [EXTERNAL] Re: [gpfsug-discuss] How to join GNR nodes to a 
non-GNR cluster
Sent by:        gpfsug-discuss-bounces at spectrumscale.org



Hallo 
"merging" 2 different GPFS cluster into one .. is not possible .. 
for sure you can do "nested" mounts .. .but that's most likely not, what 
you want to do .. 

if you want to add a GL2 (or any other ESS) ..to an existing (other) 
cluster... -  you can't preserve ESS's RG definitions... 
you need to create the RGs after adding the IO-nodes to the existing 
cluster... 

so if you got a new ESS.. (no data on it) .. simply unconfigure cluster .. 
 .. add the nodes to your existing cluster.. and then start configuring 
the RGs





From:        "Dorigo Alvise (PSI)" <alvise.dorigo at psi.ch>
To:        "gpfsug-discuss at spectrumscale.org" 
<gpfsug-discuss at spectrumscale.org>
Date:        12/03/2019 09:35 AM
Subject:        [EXTERNAL] [gpfsug-discuss] How to join GNR nodes to a 
non-GNR cluster
Sent by:        gpfsug-discuss-bounces at spectrumscale.org



Hello everyone,
I have:
 - A NetApp system with hardware RAID
 - SpectrumScale 4.2.3-13 running on top of the NetApp
 - A GL2 system with ESS 5.3.2.1 (Spectrum Scale 5.0.2-1)

What I need to do is to merge the GL2 in the other GPFS cluster (running 
on the NetApp) without loosing, of course, the RecoveryGroup 
configuration, etc.

I'd like to ask the experts
1.        whether it is feasible, considering the difference in the GPFS 
versions, architectures differences (x86_64 vs. power)
2.        if yes, whether anyone already did something like this and what 
is the best strategy suggested
3.        finally: is there any documentation dedicated to that, or at 
least inspiring the correct procedure ?

Thank you very much,

   Alvise Dorigo_______________________________________________
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gpfsug-discuss at spectrumscale.org
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