Hi Kevin,
I think one of the reasons is if you need to add or remove nodes from cluster you will start to face the constrains of this kind of solution. Let's say you have a cluster with two nodes and share the same set of LUNs through SAN. And for some reason you need to add more two nodes that are NSD Servers and Protocol nodes. For the new nodes become NSD Servers, you will have to redistribute the NSD disks among four nodes. But for you do that you will have to umount the filesystems. And for you umount the filesystems you would need to stop protocol services. At the end you will realize that a simple task like that is disrruptive. You won't be able to do online.
| Abraços / Regards / Saludos,
Anderson Nobre AIX & Power Consultant Master Certified IT Specialist IBM Systems Hardware Client Technical Team – IBM Systems Lab Services |
| | ||
| Phone: 55-19-2132-4317 E-mail: ano...@br.ibm.com | ||
----- Original message -----
From: "Buterbaugh, Kevin L" <kevin.buterba...@vanderbilt.edu>
Sent by: gpfsug-discuss-boun...@spectrumscale.org
To: gpfsug main discussion list <gpfsug-discuss@spectrumscale.org>
Cc:
Subject: [gpfsug-discuss] Not recommended, but why not?
Date: Fri, May 4, 2018 12:39 PM
Hi All,In doing some research, I have come across numerous places (IBM docs, DeveloperWorks posts, etc.) where it is stated that it is not recommended to run CES on NSD servers … but I’ve not found any detailed explanation of why not.I understand that CES, especially if you enable SMB, can be a resource hog. But if I size the servers appropriately … say, late model boxes with 2 x 8 core CPU’s, 256 GB RAM, 10 GbE networking … is there any reason why I still should not combine the two?To answer the question of why I would want to … simple, server licenses.Thanks…Kevin—Kevin Buterbaugh - Senior System AdministratorVanderbilt University - Advanced Computing Center for Research and Educationkevin.buterba...@vanderbilt.edu - (615)875-9633_______________________________________________
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