Re: VIOS on S814 Power8 -- MIDRANGE-L

Wait, what do you mean? I've only ever done direct LUN-LPAR mappings for
all my storage needs (other than one modern PS700 that had NPIV support). I
know that file-backed disks have huge performance penalties.
I've never seen a problem with Shared Ethernet Adapters for network but i
suppose that for high traffic LPARs a network card would be better (i have
a client that does that, 4LPARs use a SEA and 1 LPAR uses a 2port card by
itself).
now Tape, i haven't done shared tape (unless you count NPIV or DLPAR'ing
the IOP/IOA combo) so i can't help you.
Also, take all my comments with a grain of salt, remember i'm always a
generation or two behind on hardware (you're playing with P8 i just got a
P7).

Best Regards,

On Mon, Jun 23, 2014 at 8:44 AM, <rob@xxxxxxxxx> wrote:

Now, if someone here thinks that I really don't need/want vios to host up
tape fiber san and ethernet speak quickly. I have tracking numbers for
three different inbound servers.

Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1
Group Dekko
Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com

From: rob@xxxxxxxxx
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Date: 06/23/2014 07:41 AM
Subject: Re: VIOS on S814 Power8
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>

Tangent alert:
Roberto, I am not hearing any recommendation to host internal disk via
VIOS. I tried it and it was a performance disaster. Now I'm being told
to maybe serve up tape fiber cards and ethernet via vios but make a dummy
lpar of IBM i to host internal disk for all of my partitions of IBM i and
AIX.

Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1
Group Dekko
Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com

From: Roberto José Etcheverry Romero <yggdrasil.raiker@xxxxxxxxx>
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Date: 06/21/2014 12:42 PM
Subject: Re: VIOS on S814 Power8
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>

Is there a No-Cache SAS controller for P8? i'm more of the "Get the 2
disks
for the VIOS and maybe the image catalogs and just get the rest on SAN
storage" method, i've never seen the need to have high performance cards
driving VIOS. It's been pointed out to me that some DO use VIOS to host
the
disk instead of using SAN but i doubt that in case of Dual VIOS you would
be doing that...

On Sat, Jun 21, 2014 at 12:49 PM, Kirk Goins <kirkgoins@xxxxxxxxx> wrote:

VIOS just got a lot more expensive to do right unless I am missing I am
Something.

IBM ( at least in the past ) has recommended Dual VIOS servers and when
talking to support they are amazed if you are not. So on Power7 say a
8282-E4D
6 drive Split Backplane $800 ( mirror VIOS drives ) Approx $800 US List
Pair of 5805 SAS Raid Controllers Approx $4,400 US List
Total with disks, cables etc.Approx $5,200 US List

Power8 Config say S814 6Core
18 Drive backplane with Dual raid controllers with a nice level of

cache.

Can attached say at EXP24S and fill the 18 internal slots ( but can't
really do DUAL VIOS as IBM recommends ) $4,000 Very good Bang for the

Buck

HW wise )

6+6 Backplane with dual controllers suitable to run VIOS ( EJ0N w/EJ0S )
Approx $2,000 US List ( Very Reasonable )
The Only External SAS Raid controllers with Cache (12GB ) are $14,000 a
pair. Now I understand That is a pair of High Perf. Controllers. But if

you

don't need to hang 96HDDs, Heck I have had good performance with a lot

of

systems with the 5805 Controllers with up to 48drives ( you mileagel may
very )

So on a E4D 6core to do VIOS as recommended is about $5,200 for disk
controllers and slots for VIOS on a S814 6Core the it's about $16,000.

IBM Please consider a FC5805 type SAS Controllers in that $4,400 price
range

$16,000

Power7 8202-E4D
6 drive Split Backplane $800 (
Pair of 5805 SAS Raid Controllers $4,400
$5,200

--
Kirk
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