Apostila Lsmw - Sap 01

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SAP AG July 1999 1

Accelerating Data Migration: LSM Workbench

Legacy System Migration

Workbench

[email protected]


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LSMW?

What is



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What is data migration? / Subject of LSM

Data transfer source: non-SAP systems (legacy systems) target: SAP R/3

Initial data transfer from non-SAP systems to SAP R/3 Move data from legacy system to SAP R/3 Switch off legacy system

Periodic data transfer (Interfacing) Exchange data between R/3 and other systems

Position of data migration Requires customized R/3 System (customizing must be

finalized)


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Relevance of data migration? Accounts for15% - 20% of the total SAP R/3 implementation costs

Smaller implementation projects: up to 40%

Why is data migrationso expensive?

In many cases

you need to develop conversion programs (which can not be used

later on)

you need to deal with lots of technical details and different

technologies

data volume depends on the project volume

the effort for programming does not depend on the data volume


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SAP AG July 1999 5


What is LSMW (Legacy System Migration Workbench) ?

LSMW is a tool based on R/3.

LSMW supports periodic and single data transfer from a non-

SAP system to R/3.

LSMW uses standard R/3 interfaces.


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What LSMW can do

organize the data migration project

project, subproject, object

document the data migration project

define data conversion per object

select target business object (p.e. customer master, material master) method (p.e. create, change) import technique (p.e. batch-input, IDoc)

define source

structure of the source data (segments, fields, file attributes etc)

define relations between source and target (SAP R/3) on record level and on field level

define rules transfer of field contents


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What LSMW can do

transport the data migration object

via download and upload

via R/3 transport system

What LSMW cannot do

extract data from the legacy system

outbound: transfer data from SAP R/3 into another system


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Requirements

for the use of

LSMW


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Organisational

Customizing of the R/3 applications must be finished Know how in LSMW (1-2 days)

Knowledge of the source data (Which fields means what?)

Knowledge of the R/3 application (Which fields means what?)

technical know how

R/3 basis (batch input processing, IDoc processing)

ABAP

System requirements for LSMW 1.6 (July 1999): R/3 release 4.0x or 4.5x

for LSMW 1.0 (Sept. 1998): R/3 release 3.0F or 3.1x


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work?

LSMW

How does



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DatenmigrationData Migration


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Define source structures

Bank data

Contact person

Vendor masterDA

T

A

M

I

GR

A

T

I

O

N

B1 B2 B3 ... C1 ...C2 C3 C4A1 A2 A3 A4 A5 A6 A7 ...


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Define source fields

D

A

T

E

M

I

G

RA

T

I

O

N

Vendor master

Bank data

Contact person

L1 L2 L3 L4 L5 L6 L7 ...

B1 B2

A1

B3 ...

...A2 A3 A4

D

A

T

A

M

I

GR

A

T

I

O

N

B1 B2 B3 ... C1 ...C2 C3 C4A1 A2 A3 A4 A5 A6 A7 ...


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Define structure relationshipsVendor masterL1 L2 L3 L4 L5 L6 L7 ...

Bank dataB1 B2 B3 ...

Contact personA1 ...A2 A3 A4

...

D

A

T

A

MI

G

R

A

T

I

O

N

B1 B2 B3 ... C1 ...C2 C3 C4A1 A2 A3 A4 A5 A6 A7 ...


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Fieldmapping and conversion rulesVendor master

L1 L2 L3 L4 L5 L6 L7 ...

Bank dataB1 B2 B3 ...

Contact personA1 ...A2 A3 A4

...

Move

1:1translation

Individualcoding

Fixed value/constant

D

A

T

E

N

M

I

G

R

A

T

I

O

N

D

A

T

A

M

I

GR

A

T

I

O

N

B1 B2 B3 ... C1 ...C2 C3 C4A1 A2 A3 A4 A5 A6 A7 ...


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Central conversion rules (reusable rules)

Generating standard conversion rules

Same conversion in several data objects

Assure consistent data conversion in different data objects

Material number Material master

Sales order

Purchase requisition


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Migration customizing

Rules with several variants

and alternatives

Variable fixed values

user-defined routines

Check against R/3 customizing

Input file for the import program


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Further steps

generate conversion program

read source data

data conversion

run import

D

A

T

A

M

I

GR

A

T

I

O

N


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H Customer #1 (header rec.)

P Contact person #1

P Contact person #2

... ...

IdentifyingIdentifying

stringstring

(H=header(H=header

P=position)P=position)

Interfaces to legacy-system data

Data from spreadsheet-based applications

MS Excel, MS Access, etc.

Data from host systems on R/3 application servers

Fixed record length, end of record indicator or hexadecimallength field at the beginning

With and without separator

Code page conversion

Hierarchical data with identifying field values


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Which data can be migrated via LSMW?

Standard Batch Input, Standard Direct Input

precondition: application program

entries in tables SXDA* (DX-Workbench)

Batch Input Recording

Recording a transaction

Flat target structure (no header-position constellations with variable amount of positions)

Methods for Business Objects (BAPIs)

All BAPIs for which an ALE-IDoc interface has been generated

(by SAP development)

IDocs

All


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LSMW

What does

look like?



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Define project,

subprojectand object

Define project,

subprojectand object


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Select

migration step

Select

migration step


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Enter

structures oflegacy system

in R/3

Enter

structures oflegacy system

in R/3


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Define

conversion

rules andfield

mapping

Define

conversion

rules andfield

mapping


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Generated

conversionprogram

Generated

conversionprogram


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Overview of

migrationobject

Overview of

migrationobject


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Migration

customizing:

translation table

Migration

customizing:

translation table


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Edit recordingEdit recording


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Advantages and strengths at a glance:

Part of R/3 and therefore platform-independent

Wide range of data conversion techniques (fixed values,

translation, ABAP coding, etc.)

Migration customizing: no literals in rules

Conversion program generated from conversion rules

User guidance: data migration in 14~20 steps

Interface for data in spreadsheet format

Check against R/3 Customizing before processing the import

Free of charge for SAPs customers and partners

A l i D Mi i LSM W kb h


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Advantages and strengths at a glance:

Migrated data in R/3 is consistent

user friendly

only basis ABAP knowledge necessary

in most cases only few programming has to be done supports data transfer for the most important master and

transaction data

A l ti D t Mi ti LSM W kb h


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Examples of positive feedback:

... Just wanted to let you know us here at ... We are very

pleased with the LSM product. We are using it for most of our

conversions and have found it to be of tremendous help and

quality. ...

The LSM Workbench saved the day. Without it, we would

never have been finished on time.

...in our opinion, the major benefit is LSMs flexibility, whichallows us to respond very quickly to changing requirements...



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Examples of positive feedback:

...within two and a half hours, we managed to generate our

own migration object for the material master transfer, and

successfully migrate the material masters from the EXCEL

sheet. It was a complete success! ...

...the transfer of master data on June 12, and of the open items

on June 19, 1998, meant that we could go live the same day.

...I used the LSMW to transfer customers and creditors, and Iwas really impressed by how fast and flexible it was!

Fantastic! ...



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Accelerating Data Migration: LSM WorkbenchInformation

Support

Training

LSMW


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LSMW

Beyond



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Outlook

Release 4.6

New-DX Workbench and LSMW

Release 5.0

Unified solution for all

data migration issues



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Legacy System Migration

Workbench

[email protected]

Apostila Lsmw - Sap 01

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