Browse Prior Art Database

Midrange Unix Migration Process

IP.com Disclosure Number: IPCOM000029896D
Original Publication Date: 2004-Jul-16
Included in the Prior Art Database: 2004-Jul-16
Document File: 9 page(s) / 126K

Publishing Venue

IBM

Abstract

Problem: How do you scope, plan, schedule and deploy Software Currency, (commonly referred to contractually as "N-1") across a large number of disparate, legacy systems ?

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Midrange Unix Migration Process

Introduction The key to resolving the problem is to understand how to organise and deliver a technology refresh cycle to the managed community of servers.

There are several elements that must be kept in focus:

Performing a change on a host will nearly always cause some kind of end-to-end impact. Very few

servers may be modified in isolation without some sort of impact. Applications Development teams tend to have a single focus (their Applications).

Operational teams tend to have a wider focus (all of the servers that they are responsinble to maintain

in a run state). Customers tend to have a systemic view of their applications. They want to understand the impacts to

the Application, not to the underlying hosts. Operational or technical support groups tend to have a lower-level focus. They think in terms of hosts


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, not Applications.

Process summary (Key to dataflow diagrams)

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The MUMP is split up into three distinct phases:

Migration Analysis - This sub process identifies the nature of the migration. It gathers profiling data on

each Application at the supporting host level. It then provides strategies to assist with the migration of each Application by focusing on the changes that need to be made to each host .

Dataflow diagram for Migration Analysis:


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Migration Scheduling - This sub process examines to interdependencies between all of the hosts in the

community. It provides an end-to-end view of al...