difference between LSMW and BDC

[Former Member]

hi experts,

can anyone pls reply for the following questions

1. what is the difference between LSMW and BDC or with any other data transfer techniques in SAP.

2. is any ABAP coding applicable in LSMW

3. for which requirement we prefer LSMW and for which we go for BDC

4. which technique is mostly used in real time

5. based on performance issue which one is better

[Former Member]

LSMW and BDC are vastly different.

BDC (Batch Data Communication) is a technology used for data transfer. it is meant for transferring data thru SAP transactions itself. when u use BDC for data transfer, the sequence of steps is the same as when u use standard sap transaction screens for data upload. the only difference is that u can use different options for foreground/background processing.

LSMW on the other hand is a tool that helps migrate data from a legacy system (non-sap system ) to SAP system. it offers u various options to use either batch input, direct input, BAPIs or idocs. it involves a series of some 17-18 steps to migrate data.

BDC:

Batch Data Communication (BDC) is the process of transferring data from one SAP System to another SAP system or from a non-SAP system to SAP System.

Features :

BDC is an automatic procedure.

This method is used to transfer large amount of data that is available in electronic medium.

BDC can be used primarily when installing the SAP system and when transferring data from a legacy system (external system).

BDC uses normal transaction codes to transfer data.

Types of BDC :

CLASSICAL BATCH INPUT (Session Method)

CALL TRANSACTION

BATCH INPUT METHOD:

This method is also called as ‘CLASSICAL METHOD’.

Features:

Asynchronous processing.

Synchronous Processing in database update.

Transfer data for more than one transaction.

Batch input processing log will be generated.

During processing, no transaction is started until the previous transaction has been written to the database.

CALL TRANSACTION METHOD :

This is another method to transfer data from the legacy system.

Features:

Synchronous processing. The system performs a database commit immediately before and after the CALL TRANSACTION USING statement.

Updating the database can be either synchronous or asynchronous. The program specifies the update type.

Transfer data for a single transaction.

Transfers data for a sequence of dialog screens.

No batch input processing log is generated.

For BDC:

http://myweb.dal.ca/hchinni/sap/bdc_home.htm

https://www.sdn.sap.com/irj/sdn/wiki?path=/display/home/bdc&;

http://www.sap-img.com/abap/learning-bdc-programming.htm

http://www.sapdevelopment.co.uk/bdc/bdchome.htm

http://www.sap-img.com/abap/difference-between-batch-input-and-call-transaction-in-bdc.htm

http://help.sap.com/saphelp_47x200/helpdata/en/69/c250684ba111d189750000e8322d00/frameset.htm

http://www.sapbrain.com/TUTORIALS/TECHNICAL/BDC_tutorial.html

LSMW:

The LSM Workbench is an R/3-based tool that supports You when transferring data from non-SAP systems ("Legacy Systems") to R/3 once or periodically.

The tool supports conversion of data of the legacy system in a convenient way. The data can then be imported into the R/3 system via batch input, direct input, BAPIs or IDocs.

Furthermore, the LSM Workbench provides a recording function that allows to generate a "data migration object" in an entry or change transaction.

The main advantages of the LSM Workbench:

• Part of R/3 and thus independent of individual platforms

• A variety of technical possibilities of data conversion:

• Data consistency due to standard import techniques:

Batch input

Direct input

BAPIs (Business Application Programming Interfaces)

IDocs (Intermediate Documents)

The import technique to be used in an individual case depends on the business object.

• Generation of the conversion program on the basis of defined rules

• Clear interactive process guide

• Interface for data in spreadsheet format

• Creation of data migration objects on the basis of recorded transactions

• Charge-free for SAP customers and SAP partners

http://help.sap.com/saphelp_nw04s/helpdata/en/87/f3ae74e68111d1b3ff006094b944c8/content.htm

http://www.sap-img.com/sap-data-migration.htm

http://www.scmexpertonline.com/downloads/SCM_LSMW_StepsOnWeb.doc

http://allsaplinks.com/lsmw.html

http://myweb.dal.ca/hchinni/sap/lsmw_home.htm

I hope it helps.

Best Regards,

Vibha

*Please mark all the helpful answers

[former_member184569]

Hi Varalakshmi

The differences between LSMW and BDC are stated as below :

1.lsmw is basically for standard sap application.

BDC is basically for customized applications.

2. In lsmw mapping is take care by sap.

In bdc we have to give mapping concept explicitly.

3. LSMW offers different techniques for migrating data say : Direct input , Batch input recording , BAPI , IDOC.

BDC basically uses recording. There are two methods to implement BDC : (a) Call Transaction Method

(b) Session Method.

4. LSMW is basically designed for Functional consultants who do no coding .

BDC is used by technical consultants , who do coding.

5.In LSMW , Coding cannot be done flexibily as BDC.

On the other hand in BDC ,Coding can be done flexibly to customize applications.

6. In LSMW, we do the recording through LSMW only. However, in case of BDC we do the recording through transaction SHDB.

7. LSMW is more preferable method as it uses the standard programs for data upload. In case of BDC, if screen design changes tomorrow, program will not work(need to do the recording again).

Thanks,

Susmitha

[Former Member]

Hi VaraLakshmi,

See LSMW you can say it is a Tool Which is used to Update. Ok And this is mostly Done by the Functional People. But Where as the BDC we write coding What to be done. As per my knowledge Coding can be added.

Bye

Murthy

[Former Member]

Hi varalakshmi,

1. what is the difference between LSMW and BDC or with any other data transfer techniques in SAP.

LSMW = no abap required, used by functional consutants

BDC = abap required

2. is any ABAP coding applicable in LSMW

For all practical purpose, abap not required.

3. for which requirement we prefer LSMW and for which we go for BDC

BDC is generally used when table controls are used,

other wise LSMW is the best thing.

4. which technique is mostly used in real time

LSMW.

5. based on performance issue which one is better

LSMW

regards,

amit m.

[Former Member]

thanks for ur reply its very helpful for me

thanks a lot

subhash reddy

[Former Member]

I hope it's helpful for every one.

Thanks