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On 1/18/2021 9:49 PM, Pete Helgren wrote:
Yes, virtual HMC it is....
Starting on the "dumber than a bag of hammers" questions now.
Assumption: I am creating a NEW IBM i partition so that not every
resource is allocated to it
First you are creating a new PROFILE for the existing IBM i partition.
It will not need to be re-installed and you will lose nothing. Perhaps
semantics there but key.
1) Processors: I gotta admit, this always threw me, even with the
JS12 and VIOS. I am assuming that I want one dedicated processor for
IBM i which it is licensed for. Correct?
Correct. Unless you intend additional IBM i partitions then dedicating
one processor to IBM i is the correct answer. You have three more to
share among the Linux boys.
2) Any advantage to shared memory vs
IBM i doesn't support shared memory.
3) On the I/O page: Is there any reason I *wouldn't *want to
include all the physical resources like Gigabit Adapter and the two SAS
RAID adapters? Again the plan here is to carve out a couple of Linux
LPARS after I free up some resources.
Fore sure you'll need the SAS RAID cards or IBM i won't be able to see
the disks, and it's just not itself when it can't find the disks. :-)
If there is only one Ethernet adapter then you'll need that for sure.
You will use one port on there for IBM i and one port to bridge to the
Linux guys. This partition will be the host for the other guys so he
will own the lions share of that. However you COULD add more Ethernet
adapters and let each Linux guy have one. That's wasted money though IMHO.
4) As I ponder creating this new profile, how will this affect the
existing resources on the IBM i? Most notably, the Ethernet adapters
that currently exist. Do they lose the underlying resources since I am
now creating a new virtual resource for it? Just wondering if when this
guy IPL's if it will be accessible....
No change. You're allocating the stuff it needs to run. Despite the new
profile all that hardware will be the same stuff, in the same slot, and
importantly with the same serial number and thus will report in as the
same resources. So he'll be happy.
That's only the first few dumb questions....I noticed that the SCSI
adapters have a "Server" or "Client" option (I'll assume SERVER although
the document I am looking at says server and then later on talks about
creating a client SCSI....). And, the checkbox next to this adapter is
required for partition activation?
So the Client and Server thing will make sense once you complete
creating the first partition. IBM i is the host partition so it will
have 'Server' adapters. They will 'serve up' disk to the Linux guest
partitions. You'll want to be specific when you create those and point
them at a specific slot (I'd use 2 or 3) on the guest and specify the
guest partition that will use this adapter. Note that partition number
is a drop-down and it will be blank because you dont have those
partitions yet but you can put in a number there and it will take it. So
if your first Linux guest will be partition number 2 then enter 2 for
the partition number. Remember IBM i is partition number 1.
The Linux partitions will have Client vSCSI adapters that will point
back to the matching Server adapter on IBM i. Again this is done by slot
number and partition number. It's rather like connecting a SCSI cable
between the correct drawer of drives (IBM i) and the RAID card that
Linux owns. Get it wrong and you'll see the wrong disk(s) or no disk(s)
at all. :-)
Just slightly advanced but I like to create a PAIR of host adapters and
PAIR of client adapters for each guest partition. One is used for DIsk,
disk and only disk, never anything but disk. The other pair is used to
share virtual optical and tape. You may not use Tape with Linux but you
will use virtual optical to install the critter most likely. Having
those separate means you can vary off the one used for optical without
clobbering Linux.
Linux will only have a virtual network adapter in the same VLAN as the
one you created on IBM i. It will NOT have the box checked for 'Access
External Network' - only IBM i as the host gets that box checked. This
box triggers promiscuous mode on the virtual adapter so that the bridge
will function.
More smart answers later. :-)
- L
More dumb questions later.....
Pete Helgren
www.petesworkshop.com
GIAC Secure Software Programmer-Java
AWS Certified Cloud Practitioner
Twitter - Sys_i_Geek IBM_i_Geek
On 1/18/2021 3:54 PM, Larry "DrFranken" Bolhuis wrote:
I think he got a virtual HMC if I recall.
- L
On 1/18/2021 4:38 PM, Don Brown via MIDRANGE-L wrote:
Larry, I thought Pete said he did NOT have HMC ?
How can you create the profile without HMC ?
Thanks
Don
midrange.com
