No vios this time. When we built the old system 9 years ago the thought was to bring some linux workload on board. That is all hosted on AWS now, so just two IBM i partitions. Production and development. Only two people use development, so it is small. New system as it stands now is 18 283 drives in the CEC. 2 hot spares and Raid 5. So 4245 gigs of drive (up from 1702 before). I want to just carve out about 500 gigs for development (current 283) and run it IBM i hosting IBM i.
-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Jim Oberholtzer
Sent: Wednesday, December 19, 2018 9:32 AM
To: 'Midrange Systems Technical Discussion'
Subject: RE: NWSD and NWSSTG recommendations
Kevin:
Are you keeping VIOS and using ViSCSI support or going completely to IBM i hosting IBM i?
IBM i cannot host anything if it is virtualized as well.
IF VIOS then the rules are very different than IBM i as a hosting environment. Frankly VIOS is awful at iSCSI virtualization so if that's all that VIOS is doing I would far prefer an IBM i host. (IBM i can host IBM i , Linux, and AIX)
--
Jim Oberholtzer
Agile Technology Architects
-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxx> On Behalf Of Kevin Bucknum
Sent: Wednesday, December 19, 2018 9:08 AM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Subject: RE: NWSD and NWSSTG recommendations
Is there a guide somewhere on setting this up? And maybe a best practices?
We are working on getting our next box now. Our dev partition which is 2 mirrored 283 gig drives hosted on vios (and slow as hell!) is going to become about 500 gigs in an i on i situation. I'd like to optimize that disk speed, as that is the only really bad thing about that partition now.
-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Jim Oberholtzer
Sent: Wednesday, December 19, 2018 8:53 AM
To: 'Midrange Systems Technical Discussion'
Subject: RE: NWSD and NWSSTG recommendations
200GB drives in the quantity you are proposing should work well.
The limits on the number of NWSSTG units a NWSD instance would support was
16 and was raised later, I'm not sure what the limit is now, but I've always found performance is best when we put no more than 12-13 drives per NWSD instance. It also gives you the ability to add drives later and spread them out vs. putting all the new drives in one place.
Watch memory in the machine pool and *BASE, carefully. That's where quite a bit of this virtualization is done, you'll be surprised at how much memory it takes. Don't short it.
--
Jim Oberholtzer
Agile Technology Architects
-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxx> On Behalf Of Steinmetz, Paul
Sent: Wednesday, December 19, 2018 8:38 AM
To: 'Midrange Systems Technical Discussion' <midrange-l@xxxxxxxxxxxx>
Subject: NWSD and NWSSTG recommendations
New P9, 9009-42A, V7R3.
I will be virtualizing about 20 TB of SSD to client R&D LPAR.
The entire R&D LPAR will virtualized.
My plan was 10 NWSD each consisting of 5 200gb NWSSTG.
This would give me 50 arms, each about 200gb each, one would be the load source.
Some rules and guidelines from previous posts.
More arms the better.
For performance - at least 6 NWSSTG per system, max 16 (32?) NWSSTG per NWSD Consistently sized and at least 70GB ??
Goal is for optimal performance on both the host and the client LPARs.
1) Does anyone have any history on the optimal number of NWSD?
2) Can too many NWSD cause a performance issue.
Also, I will be repeating this process for 2 additional sandbox LPARS, each about 5 TB.
When complete, host LPAR will have about 20 NWSD.
Any thoughts from the group?
Thank You
_____
Paul Steinmetz
IBM i Systems Administrator
Pencor Services, Inc.
462 Delaware Ave
Palmerton Pa 18071
610-826-9117 work
610-826-9188 fax
610-349-0913 cell
610-377-6012 home
psteinmetz@xxxxxxxxxx
http://www.pencor.com/
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[
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[
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Senior Programmer Analyst
MEDDATA / MEDTRON
120 Innwood Drive
Covington LA 70433
Local: 985-893-2550
Toll Free: 877-893-2550
https://www.medtronsoftware.com
CONFIDENTIALITY NOTICE
This document and any accompanying this email transmission contain confidential information, belonging to the sender that is legally privileged. This information is intended only for the use of the individual or entity named above. The authorized recipient of this information is prohibited from disclosing this information to any other party and is required to destroy the information after its stated need has been fulfilled. If you are not the intended recipient, or the employee of agent responsible to deliver it to the intended recipient, you are hereby notified that any disclosure, copying, distribution or action taken in reliance on the contents of these documents is STRICTLY PROHIBITED. If you have received this email in error, please notify the sender immediately to arrange for return or destruction of these documents.
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