How to and what to check in your BW system before GO-Live

How to and what to check in your BW system before GO-Live

Before going to production your BW system ,please check the below things….

Steps

Transfer global settings. Goto Administrator Workbench -> Modeling -> Source Systems. Select an R/3 source system -> right-click and choose Transfer global settings.

Select Currencies and choose a transfer mode.

Simulation - The transfer of Customizing tables/exchange rates is simulated. No data is updated.

Update tables - The Customizing tables/exchange rates are collected from the source system. The new entries are updated on the database.

Rebuild tables - The Customizing tables/exchange rates are collected from the source system. The tables are rebuilt, old data is deleted.

Then Execute.

Repeat these steps for Units of measurement, Fiscal year variants, and Factory calendar for each R/3 source system in BW.

Transfer exchange rates. Goto Administrator Workbench -> Modeling -> Source Systems. Select an R/3 source system -> right-click and choose Transfer exchange rates.

Maintain Exchange rates and the transfer mode.

Simulation - The transfer of Customizing tables/exchange rates is simulated. No data is updated.

Update exchange rates - The Customizing tables/exchange rates are collected from the source system. The new entries are updated on the database.

Transfer exchange rates again - The Customizing tables/exchange rates are collected from the source system. The tables are rebuilt, old data is deleted.

Then Execute.

Repeat these steps for each R/3 source system in BW.

<!--[if !supportLists]-->1. <!--[endif]-->Check the read mode for queries.

For a query, the OLAP processor can read the data from the fact table in one of three ways:

Reading all of the data

When executing the query in the Business Explorer all of the fact table data that is needed for all possible navigational steps in the query, is read in the main memory area of the OLAP processor. Therefore, all new navigational states are aggregated and calculated from the data of the main memory.

Reading the data on demand

The OLAP processor only requests the corresponding fact table data that is needed for each navigational state of the query in the Business Explorer. Therefore, new data is read for each navigational step. The most suitable aggregate table is used and, if possible, already aggregated on the database. The data for identical navigational states are buffered in the OLAP processor.

Reading on demand when expanding the hierarchy

When reading data on demand (2), the data for the entire - meaning completely expanded - hierarchy is requested for a hierarchy drilldown. For the read on demand when expanding the hierarchy (3), the data is aggregated by the database along the hierarchy and is sent to the start level of the hierarchy (highest node) in the OLAP processor. When expanding a hierarchy node, the children of the node are then respectively read on demand.

In general, the reading of data on demand (2) provides much better performance than reading all the data (1). This read mode should especially be

considered for queries with many, free characteristics. A query that contains two or more free characteristics from different dimensions (e.g. 'Customer' and 'Product'), will probably only be efficiently executable in this mode, as the aggregates can only be optimally used when reading the data on demand.

For large hierarchies, aggregates should be created on the middle level of the hierarchy and the start level of the query should be smaller or the same as this aggregate level. For queries about such large hierarchies, the read on demand when expanding the hierarchy method (3) should be set.

Execute transaction RSRT and enter =RMRP into the OK field. After choosing Return, the read mode of your queries is the read mode recommended by SAP. Switch off all system traces. Execute transaction ST01. Trace status should be set to “Trace switched off”.Check trace tool. Goto transaction RSRTRACE. Verify there are no users activated for logging. Users can be removed by selecting the User -> select Deactivate user.Check BW Reporting Authorization Check Log. Goto transaction RSSM -> Authorizaton Check Log. Select a user to remove -> Remove User from List

<!--[if !supportLists]-->1. <!--[endif]-->Maintain the extraction settings for each source system. In R/3 source system goto transaction SBIW -> General Settings -> Maintain Control Parameters for Data Transfer.

1. Source System

Enter the logical system of your source client and assign the control parameters you selected to it.

You can find further information on the source client in the source system by choosing the transaction SCC4.

2. Maximum Size of the Data Packet

When you transfer data into BW, the individual data records are sent in packets of variable size. You can use these parameters to control how large a typical data packet like this is. If no entry was maintained then the data is transferred with a default setting of 10,000 kBytes per data packet. The memory requirement not only depends on the settings of the data packet, but also on the size of the transfer structure and the memory requirement of the relevant extractor. 

3. Maximum Number of Lines in a Data Packet.

Upper-limit for the number of records per data packet.

The default setting is 'Max. lines' = 100000.

The maximum main memory space requirement per data packet is around
memory requirement = 2 * 'Max. lines' *

1000 Byte, meaning 200 MByte with the default setting.

4. Frequency

The specified frequency determines the number of IDocs that an Info IDoc is to be sent to, or how many data IDocs an Info Idoc describes.

Frequency 1 is set by default. This means that an Info Idoc follows every data Idoc. In general, you should select a frequency between 5 and 10 but no higher than 20. The bigger the data IDoc packet, the lower the frequency setting should be. In this way, when you upload you can obtain information on the respective data loading in relatively short spaces of time.

With the help of every Info IDoc, you can check the BW monitor to see if there are any errors in the loading process. If there are none, then the traffic light in the monitor will be green. The Info IDocs contain information such as whether the respective data IDocs were uploaded correctly.

So many more settings we need to do ..wl try to upload the document for this..
This stuff is basically collected directly from SAP..