rp8400 node upgrade....

[aique]

Hi,
We have a rp8400 running in a cluster environment (HP-UX). Each node have 3 Cells with 4 CPUs and 4GB of RAM each.
Now we want to remove 1 Cell (4 CPUs + 4GB RAM) from 1 node and add it into the other.
What my question is, would the removal and addition of the Cell affect MC Service Guard or any other application running on the servers including OS?

Also please guide me through step by step procedure for this activity :)

Thanks and regards,
Abdul Qayyum.

[melvyn burnard · Accepted solution]

>What my question is, would the removal and addition of the Cell affect MC Service Guard or any other application running on the servers including OS?

No, it should not


>Also please guide me through step by step procedure for this activity


All documented in the nPar manuals and using man parmodify, but to list the steps:

On the node you wish to remove the cell:
parmodify -d
shutdown -H
power off the server and remove the cell board.
Power on again and check it boots ok.

On the second server:
shutdown -h
plug in the cell board
reboot the server
parmodify -a
shutdown -R
check to see server reboots and uses new cell board.

[Torsten.]

Be aware that cell0 and cell1 are connected to the internal PCI slots. If you remove one of this cells, you are losing the connected PCI slots too.

You should remove cell 2 only.

[Eric Lemmers]

Hi Abdul,

One remark about the effect on MC/Serviceguard...

MC/Serviceguard is a per processor license. Be aware of the fact that licenses should be available for all processors, when expanding the cluster with a cell board.
If the node to be removed already has MC/ServiceGuard licensed you do not have to worry.

On the Technical front the amount of cpu's/memory or I/O does not affect the MC/ServiceGuard software.

Eric

[Asif Sharif]

Assalam-O-Alaikum Abdul,

Follow these steps.

On nodeA run #parmgr
Delete required cell,in your case cell#2 becasue cell0 and 1 are core cells
then Shutdown -R now
After reboot you will have only two cells.

On nodeB run Shutdown the machine, Put cell into the cabinet then boot machine after that run parmgr and add cell into partition reboot machine and you will see new cell.

use these commands to check.

ioscan -fnC processor
ioscan -fnC memory

Regards,
Asif Sharif

[aique]

Thanks all, my problem is solved with your help.

Abdul