Rob
In this scenario, does the "host" have to be available for the guested partitions to run?
Regards
Andy
-----Original Message-----
From: rob@xxxxxxxxx [mailto:rob@xxxxxxxxx]
Sent: 18 June 2010 13:39
To: Midrange Systems Technical Discussion
Subject: RE: LPAR for testing on a relatively small machine?
Hear hear!
I have a 9408-M25 with one "host" partition running 7.1 and two guested partitions underneath that with both also running 7.1. They also ran happy when all were at 6.1.
Guesting allows all partitions to share all available disk arms.
Screw separate controllers for each partition! Screw taking the disk arms and divvying them up by partition! Stick a CD in the CD drive and all three simultaneously report that volume id is now in the drive.
Power 6 and 6.1 (or above) rocks! Love having that HMC also.
We keep our percent used on our machines really low. Amazingly low.
MAIL3: Hosting partition
Only partition with "real" disks.
WRKDSKSTS
Size %
Unit Type (M) Used
1 433C 139594 51.3
1 433C 139594 51.3
2 4328 123488 49.9
3 4328 141129 49.9
4 4328 123488 49.9
5 4328 123488 49.9
6 4328 123488 49.9
7 4328 123488 49.9
8 4328 123488 49.9
9 4328 123488 49.9
10 4328 123488 49.9
11 4328 141129 49.9
12 4328 141129 43.4
13 4328 141129 43.4
14 4328 141129 43.4
15 4328 141129 43.4
16 4328 141129 43.4
17 4328 141129 43.4
18 4327 52923 43.4
19 4327 52923 43.4
20 4327 52923 43.4
21 4327 70564 43.4
22 4327 70564 43.4
23 4327 52923 43.4
GDI: First Guest partition. Added a second "storage space" when first got tight.
WRKDSKSTS
Size %
Unit Type (M) Used
1 6B22 233020 30.1
2 6B22 93212 33.3
GDWEB3: Second Guest partition.
WRKDSKSTS
Size %
Unit Type (M) Used
1 6B22 279622 27.4
Rob Berendt
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From: "Pete Massiello" <pmassiello-ml@xxxxxxxxxxxx>
To: "'Midrange Systems Technical Discussion'"
<midrange-l@xxxxxxxxxxxx>
Date: 06/18/2010 06:59 AM
Subject: RE: LPAR for testing on a relatively small machine?
Sent by: midrange-l-bounces@xxxxxxxxxxxx
You don't need to worry about multiple controllers as the M25 is a power6 processor, and it can do virtual LPARS. This means, that an IBM I partition on 6.1 or later can host another IBM I partition at 6.1 or later. It's extremely simple to do ( I gave a presentation on this earlier this week at COMMON Europe) and the only thing you need is an HMC if you have a Power6 or
Power7 machine, and both your hosting and hosted partitions can be either 6.1.x or 7.1. I have been building these for my customers now for the past year and they work great.
Pete
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-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Neeraj J
Sent: Friday, June 18, 2010 4:36 AM
To: Midrange Systems Technical Discussion
Subject: Re: LPAR for testing on a relatively small machine?
Are those 12 disk on same controller or different ?
On Thu, Jun 17, 2010 at 10:25 PM, Lennon_s_j@xxxxxxxxxxx < lennon_s_j@xxxxxxxxxxx> wrote:
Can we create an LPAR for testing on a relatively small machine? Any
thoughts from hardware experts would be appreciated, before we
starting digging into the manuals...
Here's the picture:
We have a 520 M25 running V6R1, 1 processor, 16GB memory with plenty
of spare CPU time.
We have 12 4328 disk units at Raid 5. 8 are 120mb, 4 are 100mb, for
over 1 TB of space. We could devote 25% of this to a test LPAR.
I believe we could share the CPU so that the existing production
partition would rarely be impacted (it would always get priority for
cycles).
But can we realistically split up 12 drives so that 25% goes to a new
LPAR? For continued production performance I think we'd want
production data spread across all 12 units.
Back in a former life on an earlier OS with much bigger machines, IIRC
we needed a separate disk controller for each LPAR, but I was much
further removed from hardware nuances then. (I'm still not all that
close...)
Thanks, Sam
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