RE: Power 8 vHMC versus HMC Stand-alone Pros and Cons

You're going to put the HMC on one of the most unstable and untrustworthy
pieces of equipment in the entire technology stack?

Now if you are in a pure development environment I can see it, -- or -- if
you plan to only use that as a backup or like Larry and I might do, to have
a portable HMC for emergency use at our customers, OK, but he main one,
nope. How are you going to handle the one single Ethernet port?


--
Jim Oberholtzer
Agile Technology Architects


-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Aaron
Bartell
Sent: Wednesday, March 08, 2017 7:59 AM
To: Midrange Systems Technical Discussion
Subject: Re: Power 8 vHMC versus HMC Stand-alone Pros and Cons

What are the disadvantages of running vHMC via Virtualbox on your laptop?

Aaron Bartell
IBM i hosting, starting at $157/month. litmis.com/spaces


On Wed, Mar 8, 2017 at 7:56 AM, Jim Oberholtzer <midrangel@xxxxxxxxxxxxxxxxx

wrote:

I have customers using both the(physical) pHMC and (virtual) vHMC.
In a larger VMWare environment where you have an administrator that's
experienced the vHMC is great. But it takes a few VMWare skills to do
it right.
Getting the networking right and doing the updates seems to be the biggest
hang up. Experience counts. DR on the VMWare environment is in my mind
a
major concern, going back to the VMWare skill set.

In a small shop where there might be one POWER system and one HMC, despite
the price differences I usually suggest the pHMC. Most often those shops
have smaller VMWare environments and the level of administration
sophistication is not quite as high. The problem comes in when there
is a major outage of the VMWare system. If that happens and there is
an event on the POWER system that has to be dealt with (Often they are
concurrent) then the POWER system is completely depended on a VMWare
environment that is potentially not available.

So, small shop with limited VMWare skills, or more advanced skills in
VMWare? Don't create DR dependencies where they could bite like a
white shark.


--
Jim Oberholtzer
Agile Technology Architects


-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
LRoberts@xxxxxxxxxxxxxxx
Sent: Tuesday, March 07, 2017 1:25 PM
To: Midrange Systems Technical Discussion
Subject: Power 8 vHMC versus HMC Stand-alone Pros and Cons


We are planning on upgrading to a Power 8 (8286-41A) in the next 6

months.

We are currently on V7.1 TR11 and will upgrade to V7.3 after hardware
upgrade.

I am wondering if anyone can share their insight on any pros and cons
of going with the vHMC (5765-HMV) rather than the stand alone HMC
7042-CRx

I am aware of the pricing difference.

My concern is more that it will be housed on the network VMware and
that the IBM i does not call home if there is an issue.

Has anyone had any issues that they could not connect to the vHMC and
that the network VMware folks had to resolve or any other issues ?


Thanks in Advance

Laura R









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