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

Chapter 6. Coexistence, migration, and integration 167

6.5 Migration tips

The following list contains tips that are well documented in the

RS/6000 SP:

Planning Volume 2, Control Workstation and Software Environment

, GA22-7281

and in the

PSSP for AIX: Installation and Migration Guide

, GA22-7347. However,

we would like to collect them in one place for your consideration before and

during the migration:

򐂰 Read the

Read This First

document before doing any migration or integration

activity. The latest version of the PSSP documentation can be found at:

http://www.ibm.com/servers/eserver/pseries/library/sp_books/pssp.html

򐂰 Use

RS/6000 SP: Planning Volume 2, Control Workstation and Software

Environment

, GA22-7281, for planning the maintenance.

򐂰 Create a system backup before any maintenance activity.

򐂰 Archive the SDR on the CWS before any PSSP-related maintenance activity.

򐂰 Use the

PSSP for AIX: Installation and Migration Guide

, GA22-7347 as a

reference for all steps of the migration activity. It contains information about

the new steps you have to do because of newly introduced features in the

software.

򐂰 Check the error logs and PSSP log files both on the CWS and the nodes for

any hidden problems. They can cause lots of trouble during migration.

򐂰 Ensure that all the PSSP subsystems are running well, and the

communication between the nodes and the CWS is running without any

problem before the migration.

򐂰 Check available disk space and space requirements before installation. The

AIX migration can stop and wait for intervention when the space on the disks

in rootvg is not enough for the new software level.

򐂰 The install process extends the file system with the amount of space just

enough for that installation. After migration, check the free space in the /usr

and /var file systems again and extend the file systems needed.

򐂰 Monitor your running migration using tail on the appropriate log file. A

comprehensive list of log files can be found in the “Using the SP logs” section

in Chapter 4 of the

PSSP for AIX: Diagnosis Guide

, GA22-7350.

򐂰 Create and use scripts for activities on multiple nodes to avoid typing

mistakes. Consult smit.log and smit.script in the users home directory for

help.

򐂰 Deactivate and export any non-rootvg volume groups on the nodes before

migration activities.