What is Pseudo Delta

Hi,
Can anyone throw light on Pseudo Delta Concept ??
Thanks in Advance,
Vishali.G

Hi Vishali,
Pseudo Delta processing is achieved by filtering dates in the InfoPackages.This is not the same as normal delta process that we do to extract the newly updated/ modified records. if you look at the data load it would say FULL LOAD instead of DELTA. But as a matter of fact, its only pulling the records that are changed or created after the previous load. This can be achieved multiple ways like logic in infopackage routine, selections identifying only the changed records and so on.
1) Normal delta (change log table will identify the changed records) with the option of Delta in the update tab of IP.
2) Psuedo Delta: This is a full load with calendar day selected as today's date in the selection tab of infopackage.
Realize that in both the cases you would be sending the same records, but the second method uses full load with restrictions (psuedo delta) while the first load is a straight delta.
Regards
KP

Similar Messages

Partiotning, pseudo delta, LUW

Hi gurus,
could you please tell me
how PSA partiotining done. need steps to do it. How is cube partioitning done .need steps.
what is pseudo delta and where is it done , please tell me the steps to do it
What is LUW abbriviation, and whai is its functionality in BW and R/3
thanks in advance
regards

Hi Chaudary,
PSA Partition will be done automatically also in the transaction RSCUSTV6 you could set Packet size and Partition size.
And you can partition InfoCubes using two characteristics calendar month (0CALMONTH) and fiscal year/period (0FISCPER). The special feature of the fiscal year/period characteristic (0FISCPER) being compounded with the fiscal year variant (0FISCVARNT) means that you have to use a special procedure when you partition an InfoCube using 0FISCPER.
You use partitioning to split the total dataset for an InfoCube into several, smaller, physically independent and redundancy-free units.
http://help.sap.com/saphelp_erp2005/helpdata/en/0a/cd6e3a30aac013e10000000a114084/frameset.htm
Partitioning infocube :
http://www.crmexpertonline.com/archive/Volume_01_(2005)/Issue_01_(October)/v1i1a1.cfm?session=
PPT:http://www.cs.utk.edu/~huangj/CS594S02/infovis.ppt
Hope The above two links (article and ppt) helps you to understand ..
Pseudo delta is used with generic extractors, to make a a generic extactor delta enabled ...In RSO2 after creating the datasource at the top of the screen you have "Generic delta" icon, click on this & in the following screen you need to select the field on which the delta is to be performed along with the type of delta i.e Numeric or time stamp or on 0calday.
Save the datasource & relicate it in the BW system.
A Logical Unit of Work (LUW or database transaction) is an inseparable sequence of database operations which must be executed either in its entirety or not at all. For the database system, it thus constitutes a unit.
LUWs help to guarantee database integrity. When an LUW has been successfully concluded, the database is once again in a correct state. If, however, an error occurs within an LUW, all database changes made since the beginning of the LUW are canceled and the database is then in the same state as before the LUW started.
An LUW begins
o each time you start a transaction
o when the database changes of the previous LUW have been confirmed (database commit) or
o when the database changes of the previous LUW have been cancelled (database rollback)
An LUW ends
o when the database changes have been confirmed (database commit) or
o when the database changes have been canceled (database rollback)
Points = thanks,
Regards
Message was edited by:
samara reddy

What is Pseudo or Fake Delta

Can any One Please Give Some SAP link/Documentation for Pseudo Delta .

Check these links:
Fake Delta
Data Recovery in delta loading
Hope it helps.
Regards

Reverse images in Pseudo delta

Hi All,
I have a generic extractor which fetches data from ECC based on pseudo delta.
I am using type 0 in the date field to bring the delta records to BI.
Problem.
when I load a record to bw for example a PO today and today the PO is deleted in ecc and when I load the data tommorow to the bw, the record needs to get deleted from DSO and CUBE.
To identify this I have a field 'deletion indicator' which i mapped to 0strno info object in the DSO.
Reverse images are identified by the indicator 'R' but deletion indicator is marked as 'L'.
How will the system identify the reverse image in this case?
Please le me know the solution for this.
Points assured.
Regards
Joga

Ian, after looking at what SAP suggested 'Get Delta Only Once,' this should work for your scenario:
Indicator: Only Get Delta Once
Source requests of a DTP for which this indicator is set are only transferred once, even if the DTP request is deleted in the target.
Use
If this indicator is set for a delta DTP, a snapshot scenario is built.
A scenario of this type may be required if you always want an InfoProvider to contain the most up-to-date dataset for a query but the DataSource on which it is based cannot deliver a delta (new, changed or deleted data records) for technical reasons. For this type of DataSource, the current dataset for the required selection can only be transferred using a 'full update'.
In this case, a DataStore object cannot usually be used to determine the missing delta information (overwrite and creation of delta). If this is not logically possible because, for example, data is deleted in the source without delivering reverse records, you can set this indicator and perform a snapshot scenario. Only the most up-to-date request for the DataSource is retained in the InfoProvider. Earlier requests for the DataSource are deleted from the (target) InfoProvider before a new one is requested (this is done by a process in a process chain, for example). They are not transferred again during the DTP delta process. When the system determines the delta when a new DTP is generated, these earlier (source) requests are seen as 'already fetched'.
Setting this indicator ensures that the content of the InfoProvider is an exact representation of the source data.
Dependencies
Requests that need to be fetched appear with this indicator in the where-used list of the PSA request, even is they have been deleted. Instead of a traffic light you have a delete indicator.
-Alex

What are the delta mechanisms and tables used for Lo Extraction & COPA

Hi all
what are the delta mechanisms and tables used for Lo Extraction & COPA.
please explain clealry.
Thanks & Regards,
James

James,
Please go through Roberto's weblog :
/people/sap.user72/blog/2005/02/14/logistic-cockpit--when-you-need-more--first-option-enhance-it
Anyways,
As you know LO cockpit consists of different modules(MM, PP, SD, etc)
They are called appl components. Each of them have a number (eg.MM=02) and for each appl comp they might be different Data sources and for each DS they might be different tables. So, unless you be specific we cant tell a specific table for a DS.
coming to the delta mechanisms, there are " direct delta, queqed delta and serialized delta".
Copa is based on the oepration concern. it can be created on " accouting based" or "costing based".
Assign points if helpful
Kalyan

What is a delta migration and is there any tool that support delta migration?

Hi,
We are migrating from MOSS 2007 to SharePoint 2013.
What is a delta migration and is there any tool that supports delta migration...Please help me understand.

hi
there are many tools are availabe in market like DocAve,Metalogic-Content migration and Quest Migration
so as per my experince Content Matrix is good to support all the feature while migration form Sharepoint 2007 and Sharepoint 2010 or Sharepoint 2013.
See the below link
http://www.metalogix.com/help/Content%20Matrix%20Console/SharePoint%20Edition/002_HowTo/003_MigrationActions/020_IncrementalCopying.htm
Please mark the answer if this help full..

Pseudo delta with ABAP or OLAP variables

Hey gurus!
Since I have to post my first question at SDN one day, it may better be now! I'm rather new to SAP BI, therefore your help is requested:
I'm currently implementing a pseudo delta, a full data load from ODS to ODS and subsequently ODS to Cube. The data requested should consist of yesterdays records, which was relatively easy in SAP BW 3.5.
Since it is not possible anymore to, and I quote, choose one of the following selections in the Type (Variable Changing of Selections with Background Processing) entry column from the Data Selection tab page (numbers 0-7, 0 is required), I can now only solve it with creating another OLAP variable or ABAP coding.
Is there anyone that can give me some advice or provide me with some basic ABAP coding which selects data from 'yesterday?'
Your help is appreciated!
Regards,
Joost

Thanks for your reply Pom!
I'm not sure where to insert the '0' as type in my case. I've created a data transfer process instead of an infopackage now, but when setting up my filter there is nowhere to select the type. Or do I have to create an 'old fashioned' infopackage?!
Your help is appreciated, please provide some directions.
Regards,
Joost

What is safety delta time

Hi Experts
Can any one please explain me
What is safety delta time in terms of delta data source
Thanks

Hi,
Safety Interval Upper Limit of Delta Selection
This field is used by DataSources that determine their delta generically using a repetitively-increasing field in the extract structure.
The field contains the discrepancy between the current maximum when the delta or delta init extraction took place and the data that has actually been read.
Leaving the value blank increases the risk that the system could not extract records arising during extraction.
Example: A time stamp is used to determine the delta. The time stamp that was last read is 12:00:00. The next delta extraction begins at 12:40:00. In this case, the selection interval is 12:00:00 to 12:40:00. At the end of extraction, the pointer is set to 12:40:00.
A record - for example, a document- is created at 12:40 but not saved until 12:40. It is not contained in the extracted data but, because of its time stamp, is not extracted the next time either.
For this reason, the safety margin between read and transferred data must always be larger than the maximum length of time that it takes to create a record for this DataSource (with a time stamp delta), or it must display an interval that is sufficiently large (for determining delta using a serial number).
Safety Interval Lower Limit
This field contains the value taken from the highest value of the previous delta extraction to determine the lowest value of the time stamp for the next delta extraction.
For example: A time stamp is used to determine a delta. The extracted data is master data: The system only transfers after-images that overwrite the status in the BW. Therefore, a record can be extracted into the BW for such data without any problems.
Taking this into account, the current time stamp can always be used as the upper limit when extracting: The lower limit of the next extraction is not seamlessly joined to the upper limit of the last extraction. Instead, its value is the same as this upper limit minus a safety margin. This safety margin needs to be big enough to contain all values in the extraction which already had a time stamp when the last extraction was carried out but which were not read. Not surprisingly, records can be transferred twice. However, for the reasons above, this is unavoidable.
these are used to determining the delta in a datasource:
1. Time stamp - The field is a DEC15 field which always contains the time stamp of the last change to a record in the local time format.
2. Calendar day - The field is a DATS8 field which always contains the day
check the thread:
safety intervels in genric delta extraction.?
Sriram

What type of delta does LO run ?

Hi.. I understand that in COPA extraction there are no migration steps involved as it runs on "time stamp delta". If that is the case then please let me know what type of delta does LO and LIS run... If even LO and LIS run on time stamp then please let me know why are there no migration steps involved in COPA...?

Logistic's Area use's three Types of Delta Mechanism's :
1. Direct Delta
2. Queued Delta
3. Un-serialized V3 Update
These are different work processes on the application server that takes the update LUW (which may have various DB manipulation SQLs) from the running program and execute it. These are separated to optimize transaction processing capabilities.
Taking an example -
If you create/change a purchase order (me21n/me22n), when you press 'SAVE' and see a success message (PO.... changed..), the update to underlying tables EKKO/EKPO has happened (before you saw the message). This update was executed in the V1 work process.
There are some statistics collecting tables in the system which can capture data for reporting. For example, LIS table S012 stores purchasing data (it is the same data as EKKO/EKPO stored redundantly, but in a different structure to optimize reporting). Now, these tables are updated with the txn you just posted, in a V2 process. Depending on system load, this may happen a few seconds later (after you saw the success message). You can see V1/V2/V3 queues in SM12 or SM13.
In a local update, the update program is run by the same work process that processed the request. The dialog user has to wait for the update to finish before entering further data. This kind of update is useful when you want to reduce the amount of access to the database. The disadvantage of local updates is their parallel nature. The updates can be processed by many different work processes, unlike asynchronous or synchronous update, where the update is serialized due to the fact that there are fewer update work processes (and maybe only one).

Pseudo delta load problem

Hi all
I have schedule a pseudo delta for HR Training, input for the package is as 01.08.2008 to 30.08.2008 but if my package does not have any record for that month then it will not delete my request for the month so I have 30 request in the cube. If I get a single record then it delete all request of that month
So pl. guide me how I can overcome this situation , so even if there is no record for entire month it should delete my previous request.
Thanks in advance
Charudatta

Hi Kotha123:
Take a look at SAP Notes below.
745445 - "CRM-BW: Incorrect partners extracted in the delta".
1178613 - "CRMBW Sales: Created date differs in delta from init upload".
987142 - "CRM BW:Incorrect data from data source 0CRM_QUOTATION_I".
793986 - "Extractor:Status fields not filled in parallel processing".
Regards,
Francisco Milán.

WHAT IS SAFETY DELTA IN COPA

Hi Gurus,
WHAT IS SAFETY DELTA IN COPA?
Help me.
Regards,RAMU.

Hi,
Safety Delta
The delta method relies on a time stamp which is contained in each line item, record in the
segment level and summarization level. This time stamp makes it possible for the system to
decide which line items are already contained in the summarization level. However, if you are
using more than one computer (database/application servers), these could show a slight
difference in their system times. The system can correct inaccuracies of up to half an hour by
ignoring any postings made in the last half hour.
Refer Page 375
http://help.sap.com/printdocu/core/Print46c/en/data/pdf/COPA/COPA.pdf
Hope this helps.
Thanks,
JituK

Pseudo Delta Document

Hi,
We are planning to implement Pseudo Deltas for FI-SL transactional data. I don't know how to set Pseudo Deltas for FI-SL in R/3. Could any one send me the Pseudo Delta document.
Any one help is really appreciated.
Thanks,
Kiran

Hi,
Psuedo deltas are usually set up by putting in selection criteria in the infopackage selection of the full infopacakge.
Or you can write routines to filter out specific data and then load that.
Cheers,
Kedar

What is reset delta.

what is reset delta.

Hello Satish this is used to restart delta from beginning. I mean deleting already loaded deltas and start from begining. Here is the procedure from help.sap.com
Deleting Already Updated Data
Use
If you want to delete requests that have already been updated in connected data targets, you have to adjust the connected data targets manually.
Procedure
       1.      In the administration of the data target, choose the tab page Requests. For your request to be deleted, choose Data Mart Status for the Data Target. The following dialog box displays the request that was updated in additional data targets. Keep the description of this request in mind.
       2.      Choose Monitor on this dialog box. You arrive at the monitor for this request.
       3.      Choose Manage Data Targets. You arrive at the administration for the connected data targets.
       4.      Delete the respective request.
       5.      This takes you to the source ODS object administration screen.
       6.      Reset the delta administration. To do this, choose Data Mart Status for the Data Target and from the subsequent dialog box, choose Reset Delta Administration.
       7.      Now you can also delete the respective request from the source ODS object. You can now load data as full or data again.

WHAT IS GENERIC DELTA

Please explain me what is generic delta and how to create generic datasource for transaction data?

Hi,
Generic extraction
Usage:
1. When the standard extractors are not supporting the extraction what you need. If SAP does not have a standard extractor for your need to get data from R3, you would have to go for generic extractor.
2. If you create a custom object say by combining certain base tables in R3 say custom tables ZTAB1 and ZTAB2. These two tables are not SAP provided tables and there will not be any standard extractors. So cases like this you will have to go for generic extractors.
3. FI-SL requires generic extractors.
How:
You have to use RSO2 transaction and you can also set delta based on, one of the three characteristics such as timestamp, calday or pointer (a sequence no).
once you create it and activate it. The extractor will be available in ROOSOURCE - (table in R3 where all the data sources are available).
Steps
Log on sap R/3.
Step 1. create a table or view for generic extraction in se11.
Step 2. Goto t-code RSO2
Step 3. Here u have to decide whether to extract transaction data or master data attributes or texts.
Step 4. suppose if u have opted for transaction data,then give name in the column ex:ztd_m(data source name)
Step 5. select create button,this will take u to another screen.
Step 6. Here u have to decide from which application component u r extacting data.Ex: SD,MM,..
Step 7. in this screen u have to fill short disciption,medium,long( these r mandatory).
Step 8. then U have to Table name or view name which u have created in se11.
Step 9. I f u want to maintain generic delta then u can select generic delta in top left hand side corner.
Step 10. in next screen u have to give some field which is primary key.
step 11. here u to specify whether time stamp or cal day or numeric pointer depending on u r requirement.
step 12. then u have to specify whether new status for changed records or additive delta.
If u choose additive delta ,then u have to load data to infocube or ods object.
If u choose new status for changed records, then u to load data to ods object only.
Step 13. then save it.
Step 14. then logon to sap bw ,then replicate the data source then as usuall.
Refer:
/people/siegfried.szameitat/blog/2005/09/29/generic-extraction-via-function-module
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/d3219af2-0c01-0010-71ac-db
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/84bf4d68-0601-0010-13b5-b0
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/84bf4d68-0601-0010-13b5-b0
http://help.sap.com/saphelp_nw04/helpdata/en/3f/548c9ec754ee4d90188a4f108e0121/content.htm
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/84bf4d68-0601-0010-13b5-b062adbb3e33
Thanks,
JituK

What is safety delta?

what is safety delta?

From How to create Generic delta doc:
If delta field is Date (Record Create Date or change date), then use Upper Limit of 1 day & leave Lower limit blank.This will load Delta in BW as of yesterday.
If delta field is Time Stamp, then use Upper Limit of equal to 1800 Seconds (30 minutes).This will load Delta in BW as of 30 minutes old. Leave Lower limit blank.
If delta field is a Numeric Pointer i.e. generated record # like in GLPCA table, then use Lower Limit. Use count 10-100. Leave upper limit blank. If value 10 is used then last 10 records will be loaded again. If a record is created when load was running, those records may get lost. To prevent this situation, lower limit can be used to backup the starting sequence number. This may result in some records being processed more than once; therefore, be sure this DataSources is only feeding an ODS Object already extracted to be extracted in the next run last extraction today
refer:
Re: Doubt on Generic DataSource

What is Pseudo Delta

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