[steevojb]

This is turning out to be an interesting thread

I have another addition for discussion

If you have a p570 with no additional I/O drawer. What would be the optimal configuration.

The p570 supports 6 pci cards (not using the internal ethernet apart from scsi for internal disk)

Would you

Have 2 VIO servers

1 * HBA
1 * Ethernet
1 * SCSI adapter (only on 1 VIO to allow you to LPAR the 570)

This leaves one spare slot

Or 1 VIO server

2 * HBA
2* Ethernet

Leaves 2 spare slots

I would never consider a server with a single HBA as this would be a SPOF, but with 2 VIO servers, you have removed the SPOF as you have a failover path.

Also,

Would this configuration be supported with HACMP across 2 p570's ?

Steve

[cdelgadop]

Hi Sha012

I'm not quite sure of this, but i do have used DLPAR to move DVD, CPU Power and Memory to VIOS LPARS, only concern is not to assign the IP Address (Neccesary in order to do DLPAR Operations) to the SEA Adapter so performance won't be impacted by TCPIP Layer 3 operations. I think that if i can move resources using the HMC and RSCT daemons in VIOS then PLM can do the same thing.

About your second comment, i haven't prove PLM with Linux (Suse in my case) but i do have performed DLPAR operations with Linux on Power.

Hope this helps

[sha012]

cdelgadop,

I checked the documentation on your comments and found it is not possible or wrong.
"My recommendation is to assign more CPU power to the VIOS but you can also configure PLM (Partition Load Manager) in order to give CPU resources to the VIOS on demand. "


I say that because,

• PLM CANNOT manage the IBM Virtual I/O server , so there is no possible way you can configure PLM to manage resources on VIO server.

Another comment of yours which is wrong/not possible

"I'm not quite sure of this, but i do have used DLPAR to move DVD, CPU Power and Memory to VIOS LPARS, only concern is not to assign the IP Address (Neccesary in order to do DLPAR Operations) to the SEA Adapter so performance won't be impacted by TCPIP Layer 3 operations. I think that if i can move resources using the HMC and RSCT daemons in VIOS then PLM can do the same thing"

I say that because,

• PLM CANNOT move I/O resources between partitions, PLM CAN ONLY move memory and cpu

VIO is dlpar capable, that does not mean that it can be dlpared using PLM.


Hope I am not confusing you here

[cdelgadop]

Hi

Thanks a lot for the corrections. It's not easy to understand the big amount of info related to pSeries nowdays.

What i'm going to do is to test one VIOS LPAR as a Managed node for PLM server. VIOS is AIX with some add-on SW intended to do VIOS operations. Still runs RMC and RSCT subsystems so i think it should work. Of course if IBM says it's not certified then it's not a certified solution.

Thanks once again