IBM OS/390 User Manual
3.2.5 Education
OS/390, and to some degree migration/conversion skills are crucial factors to the
success of the migration project. Identification of skill requirements and how
these requirements will be satisfied is the main objective of the education plan.
Listed are the key elements to effective education planning:
success of the migration project. Identification of skill requirements and how
these requirements will be satisfied is the main objective of the education plan.
Listed are the key elements to effective education planning:
•
Identify personnel (who)
•
Identify personal needs (what)
•
Set schedules (when)
•
Map a master plan (how)
•
Identify resources/offering dates
3.3 Progressive versus Mass Conversion
3.3.1 Approach Differences
The difference between the progressive and mass conversion approaches is
illustrated on Figure 6.
illustrated on Figure 6.
Figure 6. Progressive versus Mass Conversion
In a progressive conversion, the VSE application portfolio is divided in smaller
application units (or kernels) which are migrated one by one to the target OS/390
environment. The production is divided between VSE and OS/390 operations for
an extended period of time. During that critical period, the OS/390 system
supports simultaneously the new production and the application conversion
including the conversion testing.
application units (or kernels) which are migrated one by one to the target OS/390
environment. The production is divided between VSE and OS/390 operations for
an extended period of time. During that critical period, the OS/390 system
supports simultaneously the new production and the application conversion
including the conversion testing.
The main distinction with the mass conversion approach is that it results in a
single switchover of the entire VSE application portfolio to OS/390 over a
weekend, with no overlap of VSE and OS/390 production. Until the switchover
weekend, all converted applications run in production under VSE. By the end of
the switchover weekend, all converted applications run in production under
OS/390. An OS/390 system is used in parallel with ongoing VSE operations to
support the migration project, but it doesn
single switchover of the entire VSE application portfolio to OS/390 over a
weekend, with no overlap of VSE and OS/390 production. Until the switchover
weekend, all converted applications run in production under VSE. By the end of
the switchover weekend, all converted applications run in production under
OS/390. An OS/390 system is used in parallel with ongoing VSE operations to
support the migration project, but it doesn
′
t support any OS/390 production until
the switchover weekend.
Chapter 3. Developing the Plan
49