For:
- A NetApp system with hardware RAID
- SpectrumScale 4.2.3-13 running on top of the NetApp < --- Are these NSD servers in their GPFS roles (where Scale "runs on top"?
- 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 ?
- SpectrumScale 4.2.3-13 running on top of the NetApp < --- Are these NSD servers in their GPFS roles (where Scale "runs on top"?
- 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 ?
......
Some observations:
1) Why do you want to MERGE the GL2 into a single cluster with the rest cluster, rather than simply allowing remote mount of the ESS servers by the other GPFS (NSD client) nodes?
2) Interop of the mix of 4.2 and 5.0 levels should be allowed by our coexistence rules.
3) Mixing x86 and Power, especially as NSD servers, should pose no issues. Having them as separate file systems (NetApp vs. ESS) means no concerns regarding varying architectures within the same fs serving or failover scheme. Mixing such as compute nodes would mean some performance differences across the different clients, but you haven't described your compute (NSD client) details.
Lyle
----- Original message -----
From: "Tomer Perry" <[email protected]>
Sent by: [email protected]
To: gpfsug main discussion list <[email protected]>
Cc:
Subject: [EXTERNAL] Re: [gpfsug-discuss] How to join GNR nodes to a non-GNR cluster
Date: Tue, Dec 3, 2019 10:03 AM
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: [email protected]
1 Azrieli Center, Tel Aviv 67021, Israel
Global Tel: +1 720 3422758
Israel Tel: +972 3 9188625
Mobile: +972 52 2554625
From: "Olaf Weiser" <[email protected]>
To: gpfsug main discussion list <[email protected]>
Date: 03/12/2019 16:54
Subject: [EXTERNAL] Re: [gpfsug-discuss] How to join GNR nodes to a non-GNR cluster
Sent by: [email protected]
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)" <[email protected]>
To: "[email protected]" <[email protected]>
Date: 12/03/2019 09:35 AM
Subject: [EXTERNAL] [gpfsug-discuss] How to join GNR nodes to a non-GNR cluster
Sent by: [email protected]
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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