LO Extraction Update Methods

LO Extraction – Part 4 Update
Methods

Applies to:
SAP BI, Business Intelligence, NW2004s. For more information, visit the EDW homepage.

Summary
This part of the article series explains the various update modes and the working methodology in LO
extraction.
Author: P Renjith Kumar
Company: SAP Labs India PVT Ltd
Created on: 19 August 2010

Author Bio
P Renjith Kumar is presently working in SAP Labs India PVT Ltd and specializes in
Extraction and Modeling areas of BI. Basically as an ABAP consultant, he has extensive
cross functional experience and has been with end to end SAP ERP and BI implementation
projects across manufacturing domain.

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© 2010 SAP AG 1

LO Extraction – Part 4 Update Methods

Table of Contents
Prerequisite................................................................................................................................................... 3
Introduction ................................................................................................................................................... 3
Direct Delta: .............................................................................................................................................. 3
Queued Delta: ........................................................................................................................................... 3
Non-serialized V3 Update: ......................................................................................................................... 3
Unserialized V3 Update................................................................................................................................. 4
When to use this? ...................................................................................................................................... 4
Queued Delta................................................................................................................................................ 5
Benefits and Features of the “Queued Delta”: ............................................................................................ 6
Direct Delta ................................................................................................................................................... 9
Concept..................................................................................................................................................... 9
Performance Factor ................................................................................................................................... 9
When you can use this?........................................................................................................................... 10
Benefits and Features of the “Direct Delta”:.............................................................................................. 10
Tables for update methods .......................................................................................................................... 11
Related SAP OSS note ............................................................................................................................... 13
Related SAP OSS note ............................................................................................................................... 13
Related Content .......................................................................................................................................... 14
Reference to my previous articles ............................................................................................................ 14
Copyright .................................................................................................................................................... 15

© 2010 SAP AG 2


Prerequisite
Kindly read the previous 3 part of the article, it will make you to feel comfortable to read this article.

Introduction
In Transaction LBWE you can see three different update methods, now we will see that in detail.
With PI 2002.1 the following new update methods for logistics extraction will be offered:
 Direct Delta
 Queued Delta
 Un Serialized V3 update

Direct Delta:
With this update mode, the extraction data is transferred with each document posting directly into the BW
delta queue. In doing so, each document posting with delta extraction is posted for exactly one LUW in the
respective BW delta queues.

Queued Delta:
With this update mode, the extraction data is collected for the affected application instead of being collected
in an extraction queue, and can be transferred as usual with the V3 update by means of an updating
collective run into the BW delta queue. In doing so, up to 10000 delta extractions of documents for an LUW
are compressed for each DataSource into the BW delta queue, depending on the application.

Non-serialized V3 Update:
With this update mode, the extraction data for the application considered is written as before into the update
tables with the help of a V3 update module. They are kept there as long as the data is selected through an
updating collective run and are processed. However, in contrast to the current default settings (serialized V3
update), the data in the updating collective run are thereby read without regard to sequence from the update
tables and are transferred to the BW delta queue.
This is shown below

Now we will see the document flow during the different update modes.

© 2010 SAP AG 3


Unserialized V3 Update
The extraction data of the application being viewed is written to the Update Queue with an V3 update module
and is kept there until the data is read with an update collection run and processed.
With this update mode, the extraction data of the application in question continues to be written to the update
tables using a V3 update module and is retained there until the data is read and processed by a collective
update run.

Note: In this mode, the delta records may not arrive in the same order in the BW as they were generated in the OLTP
system. In particular, this can cause problems in the BW when using ODS objects.

The method “Unserialized V3 Update” does not ensure serialization of the document data. Update to the
DataStore objects is not recommended if serialization is desired.

When to use this?
Due to the design of the data targets in BW and for the particular application in question, it is irrelevant
whether or not the extraction data is transferred to BW in exactly the same sequence in which the data was
generated in R/3.

Note: Scheduling V3 Update in parallel
The V3 update already uses collective processing. You cannot do this in parallel.

© 2010 SAP AG 4


Queued Delta
The extraction data from the concerned application is collected in an Extraction Queue. Then the data will be
transferred to Delta queue, in a similar manner to the V3 update, with an update Collections run.
With this update mode, the extraction data for the affected application is compiled in an extraction queue
(instead of in the update data) and can be transferred to the BW delta queues by an update collective run, as
previously executed during the V3 update. Up to 10,000 delta extractions of documents to an LUW in the BW
delta queues are cumulated in this way per DataSource, depending on the application.

© 2010 SAP AG 5


Benefits and Features of the “Queued Delta”:
 By writing in the extraction queue within the V1 update process, the serialization of documents is
ensured by using the enqueue concept for the applications.
 By collecting data in the extraction queue that is processed regularly (preferably hourly, as
recommended), this process is especially recommended for customers with a high occurrence of
documents.
 The collective run uses the same reports as before (RMBWV3<Appl.-No.>,...).
Report RSM13005 will not be provided any more.
 By collecting new document data during the delta-init request, the downtime in the initialization
process can be reduced for the reconstruction run (filling of the setup tables).
 V1 immeasurably more burdened than by using V3.
 Collective run clearly performs better than the serialized V3. Especially the critical aspect of multiple
languages does not apply here.
 Event Handling possible.
In contrast to the V3 collective run, a definite end for the collective run is measurable, and a
subsequent process can be scheduled. After the collective run for an application has ended, an
event (&MCEX_11,...) is automatically triggered which, if defined, can be used at the start of the
subsequent job.
 Extraction is independent of success of the V2 update.

Note: If you use this method, it is also necessary to schedule a job to regularly transfer the data to the BW
delta queues ("update collective run"). However, you should note that reports delivered using the logistics
extract structures customizing cockpit are used during this scheduling.

© 2010 SAP AG 6


Note: In the following cases, the extraction queues should never contain any data:

 Importing an R/3 Support Package
 Performing an R/3 upgrade
 Importing a plug-in Support Packages
 Executing a plug-in upgrade
When to use this method?
More than 10,000 document changes (creating, changing or deleting a documents) are performed each day
for the application in question.

© 2010 SAP AG 7


Useful reports in Queued delta
The deltas for logistics extractor are moved depending on the setup of Job Control in LBWE.To manually
move the deltas we can run the R/3 programs depending on Application Components.Use the following
programs to move the deltas manually.Go to transaction SE38 in R/3 and run the relevant program to move
data from LBWQ to RSA7 .
– 02 Purchasing RMBWV302
– 03 Inventory Controlling RMBWV303
– 04 Shop Floor Control RMBWV304
– 08 Shipment RMBWV308
– 11 SD Sales BW RMBWV311
– 12 LE Shipping BW RMBWV312
– 13 SD Billing BW RMBWV313

© 2010 SAP AG 8


Direct Delta
The extracted data is transferred directly to the delta queue with the Document Posting. Thus the sequence
of the transfer of document agrees with the chronological order of data creation.

Concept
With this update mode, extraction data is transferred directly to the BW delta queues every time a document
is posted. In this way, each document posted with delta extraction is converted to exactly one LUW in the
related BW delta queues.
If you are using this method, there is no need to schedule a job at regular intervals to transfer the data to the
BW delta queues.

Performance Factor
The number of LUWs per DataSource increases significantly in the BW delta queues because the deltas of
many documents are not summarized into one LUW in the BW delta queues.

Note: If you are using this update mode, note that you cannot post any documents during delta initialization in an
application from the start of the recompilation run in the OLTP until all delta init requests have been successfully
updated successfully in BW.Otherwise, data from documents posted in the meantime is irretrievably lost.

© 2010 SAP AG 9


When you can use this?
A maximum of 10,000 document changes (creating, changing or deleting documents) are accrued between
two delta extractions for the application in question. A (considerably) larger number of LUWs in the BW delta
queue can result in terminations during extraction.

Benefits and Features of the “Direct Delta”:
 By writing in the delta queue within the V1 update process, the serialization of documents is ensured
by using the enqueue concept for applications.
 For customers with a low occurrence of documents, the process is recommended if a downtime is
possible in the initialization process during the reconstruction and the delta-init request.
 V1 is more heavily burdened by this process than with V3 or the delta queue. But for customers with
the above-mentioned document occurrence, this is certainly not critical.
 Extraction is independent of V2 update.
 Additional monitoring of update data or extraction queue does not apply

© 2010 SAP AG 10


Tables for update methods
The update methods are stored in the new customizing table
TMCEXUPD: LO Data Extraction: Update Control of Applications
The field MCAPP denotes application and Update Mode gives details on update
mode

© 2010 SAP AG 11


Related SAP OSS note
505700 LBWE: New update methods as of PI 2002.1
328181 Changes to extraction structure in Customizing cockpit

© 2010 SAP AG 13


Related Content
Please include at least three references to SDN documents or web pages.
SDN
SAP Help

Reference to my previous articles
LO Extraction Part 1 – SD Overview
http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/1034bcbe-b459-2d10-2a89-
ecdeb4e53ff1?QuickLink=index&overridelayout=true
LO Extraction Part 2 – Database Update Logic
http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/804165a5-c081-2d10-39b4-
af09a680f591?QuickLink=index&overridelayout=true
LO Extraction Part 3 – Extractor Logic
http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/1094e790-1d93-2d10-17ba-
8b559bf0f75b?QuickLink=index&overridelayout=true
For more information, visit the EDW homepage

© 2010 SAP AG 14


Copyright
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