IBM eServer Cluster 1600 Managed by PSSP 3.5: What's New

Chapter 6. Coexistence, migration, and integration 145

– This step involves changing the rootvg object in the SDR with the

spchvgobj command, setting the node boot response to migrate with the

spbootins command, running setup_server, and running the nodecond

command, which changes the bootlist of the node and restarts it. It is

possible to run these commands for more than one node. Proper planning

is needed for multiple installations at the same time to avoid overloading

the network and the CWS or other boot/install servers. For more

information, refer to Chapter 6 of the

RS/6000 SP: Planning Volume 2,

Control Workstation and Software Environment

, GA22-7281.

– PSSP uses the AIX NIM environment in a special way to create the

SP-related NIM resources and allocate them for NIM clients. At migration

preparation time, the pssp_script script is defined as a NIM script resource

for the nodes. After AIX migration, this script is started by NIM to install the

new PSSP code and customize the node. For hints on customizing the

Cluster 1600 system NIM environment and keeping the settings after

running setup_server, refer to “NIM and PSSP coexistence” on page 189.

It is possible to follow the AIX migration and the pssp_script script by

watching the LED codes on the machines. For a detailed description, refer

to

PSSP for AIX: Diagnosis Guide

, GA22-7350.

– Install the latest PSSP PTFs from the CWS and restart the nodes.

– The migration and customization do not install the latest version of VSD

and GPFS, so this must be done after the initial PSSP testing.

6.3.3 Migrating PSSP 3.4 and AIX 4.3.3 to PSSP 3.5 and AIX 5.1

In this scenario, the first step is the AIX migration of the CWS.

PSSP 3.5 migration must first be done on the CWS before any nodes are

migrated to PSSP 3.5. The steps for the CWS can be done either in one or two

maintenance windows. The PSSP migration of the nodes is just a node

customization.

We have compiled the possible migration steps in Table 6-3.

Table 6-3 Migration routes

Route 1 Route 2 Route 3

Migrate AIX on CWS Migrate AIX on CWS Migrate AIX on CWS

Migrate AIX on nodes Install PSSP 3.5 on CWS Install PSSP 3.5 on CWS

Migrate PSSP 3.5 on CWS Migrate AIX and install

PSSP 3.5 on nodes

Migrate AIX on nodes