IBM OS/390 User Manual
3.1.2.2 Take Advantage Of Conversion Tools and Automation
Executing a migration with a mass conversion tool and automated processes can
reduce both the time and people required to migrate from VSE to OS/390. Where
it is not a large task to convert three programs and two strings of JCL, it is a
large and difficult task to increase the scope by one thousand and perform the
same conversion.
reduce both the time and people required to migrate from VSE to OS/390. Where
it is not a large task to convert three programs and two strings of JCL, it is a
large and difficult task to increase the scope by one thousand and perform the
same conversion.
The automation provided by the use of a mass conversion tool is unique. After
an extensive period of analysis, which includes running both pilot conversions
and dummy conversions, you can, in a final mass conversion, convert all of your
VSE applications to MVS in a single automated process.
an extensive period of analysis, which includes running both pilot conversions
and dummy conversions, you can, in a final mass conversion, convert all of your
VSE applications to MVS in a single automated process.
3.1.2.3 Migration Plan - Guide and Outline
Creating a migration plan involves analyzing what a migration requires and
developing a plan to customize the general process to your particular
installation. Developing a comprehensive and detailed migration plan is
important to the success of a migration.
developing a plan to customize the general process to your particular
installation. Developing a comprehensive and detailed migration plan is
important to the success of a migration.
The type of conversion method directly affects the content of your plan. For this
guide we have chosen to follow a mass conversion method using the Cortex MS
processes. Chapter 3, Developing the Conversion Plan, of the
guide we have chosen to follow a mass conversion method using the Cortex MS
processes. Chapter 3, Developing the Conversion Plan, of the
MVS-MS Planning
Guide provides information on how to develop a migration plan where a mass
conversion method is used. Use it as a guide to develop a plan that is specific
to your site.
conversion method is used. Use it as a guide to develop a plan that is specific
to your site.
Appendix A of the
MVS MS Planning Guide provides the outline of a sample
conversion workbook that you can use to write your conversion plan. The model
workbook contains a checklist and some questions to help you generate ideas
on what to include in your conversion plan.
workbook contains a checklist and some questions to help you generate ideas
on what to include in your conversion plan.
3.4, “Plan Examples” on page 53 also provides a sample conversion project
plan.
plan.
3.1.2.4 Two Phase Approach
The migration project can be broken into a few logical pieces that may help its
execution. One method that has been successful is to begin with a mini project,
phase 1, to identify and resolve your inventory. Proceeding with a known
inventory will allow more precise pricing. The pricing for a conversion effort is
based on inventory. It also provides information about the effort that may be
required to recreate source materials. There are tools and service providers that
perform these services. The second phase is the actual implementation.
execution. One method that has been successful is to begin with a mini project,
phase 1, to identify and resolve your inventory. Proceeding with a known
inventory will allow more precise pricing. The pricing for a conversion effort is
based on inventory. It also provides information about the effort that may be
required to recreate source materials. There are tools and service providers that
perform these services. The second phase is the actual implementation.
The Phase 1 output is also a standalone deliverable that can be very useful for
Year 2000 preparation.
Year 2000 preparation.
3.1.2.5 Conversion Method
There are two basic approaches to the migration. One approach, referred to as
the kernel approach, converts a single application or subsystem at a time. The
other, called mass migration, converts all applications, the entire system, at the
same time. The method or approach used will dictate the elements of the project
plan. This chapter will explore the major considerations of using mass migration
as a conversion method and as a conversion tool.
the kernel approach, converts a single application or subsystem at a time. The
other, called mass migration, converts all applications, the entire system, at the
same time. The method or approach used will dictate the elements of the project
plan. This chapter will explore the major considerations of using mass migration
as a conversion method and as a conversion tool.
Two tools support or implement the mass migration approach. One of these
tools, the IBM MVS-Migration System (MVS-MS), was previously licensed from
tools, the IBM MVS-Migration System (MVS-MS), was previously licensed from
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VSE to OS/390 Migration Workbook