Best Practices for SAP BI using DB2 9 for z/OS - IBM Redbooks

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Figure 12-12 on page 279 shows the primary functional components of SAP BI: ► Business Explorer This tool is used to define and execute SAP BI queries. It comprises the following tools: – BEx Analyzer and BEx Browser are two tools used to execute SAP BI queries. The BEx Analyzer is based on Microsoft Excel. – Query Designer is used to define and design the queries. – Web Application Designer is used to define and design the layout of Web-based reports. ► OLAP engine When a user executes an SAP BI query, or query navigation takes place, the OLAP engine processes the query. It splits the request into several database queries. The system then looks for the best possible aggregate for each of the database queries. It generates SQL statements, which are then executed on the underlying database system. If an SAP BI query contains restrictions on hierarchies, the OLAP engine resolves those restrictions and determines the corresponding leaf nodes of the hierarchy subtree. Finally, it consolidates the results of the executed SQL statements and sends this information back to the Business Explorer. ► Staging engine This engine provides all processing that is collectively described as extraction, transformation, and loading (ETL). This is the process of accessing source data, cleaning, transforming, and integrating it, and then loading it into the data warehouse. The ETL processing is discussed in 12.3, “Dataflow in SAP BI” on page 260. ► Administrator Workbench This allows the BW administrator to perform all data warehouse modeling and maintenance tasks within a single, unified environment. The workbench allows the administrator to back up and manage objects, define new objects and data flows, and to manage security, archiving, and other tasks. The Administrator Workbench has the following components: – Meta data maintenance, to allow the administrator to specify and maintain the InfoCubes, DSO definitions, and technical data – Scheduler, to schedule the transfer of data from the source data systems at regular intervals – Data load monitor, to supervise the load and staging processes – Data access monitor, to obtain statistics on BW usage 278 Best Practices for SAP BI using DB2 9 for z/OS
Business Explorer SAP BW Server Source Systems Figure 12-12 SAP BI functional components The communication between the SAP systems is based on standard TCP/IP. In addition, SAP provides Remote Function Call (RFC) and Application Link Enabling (ALE) protocols. Using the ALE distribution models, selected business objects can be synchronized in different SAP Systems. This synchronization of the business objects is performed via the Business Application Programming Interface (BAPI). The business objects are transferred using the intermediate documents (Docs). 12.13 SAP BI business content Enterprise Portal - Reporting BEx Analyzer BEx Browser Meta Data Master Data Staging Engine Administrator Workbench BAPI OLAP Engine R/3 Non-R/3 SAP BW InfoCubes Other Interfaces Extraction, Transformation, and Loading ODS PSA To accelerate the SAP BI implementation, SAP provides a component called business content. It incorporates best practices and the business process knowledge of SAP. File Chapter 12. Concepts, activities, and terminology 279
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Best Practices for SAP BI using DB2
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Note: Before using this information
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4.4 Extended sparse index and in-me
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11.3 SAP BI database and InfoCube l
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viii Best Practices for SAP BI usin
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Trademarks The following terms are
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The team that wrote this IBM Redboo
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Thanks to these authors from the Pr
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► Send your comments in an e-mail
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1.1 Product overview The business w
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In general, database administrators
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► Horizontal growth is achieved b
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8 Best Practices for SAP BI using D
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2.1 BI architecture Figure 2-1 show
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New term Old term Analysis authoriz
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negative values means missing stati
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- When calculating database statist
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If you specify a partitioning schem
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Important: Never partition a PSA ta
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Figure 2-10 DPSIs versus NPSIs Figu
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Finally, Figure 2-12 explains which
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Figure 2-14 shows how the snowflake
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► Realignment This refers to the
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3.1 Base recommendations - SAP BI i
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the F- fact table, the E- fact tabl
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34 Best Practices for SAP BI using
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4.1 Dynamic index ANDing for star s
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Figure 4-2 and Figure 4-3 on page 3
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4.2.1 Processing RUNSTATS for BI ta
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RUNSTATS will then be called over t
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DSNU610I -DB2T 081 16:36:03.85 DSNU
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Often the single-value based freque
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Several things worth noting are:
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The unit of a value specified to MX
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condition, generated by SAP BI upon
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There is a separate IBM Redbooks pu
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5.1 Load PSA In this section we dis
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5.1.1 Load PSA To load data into th
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After the source system, the DataSo
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Note the available tabs (registers)
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Figure 5-8 shows the provided optio
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Figure 5-10 shows the following:
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The PSA table name is created autom
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5.1.4 PSA partitioning Partitioning
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An InfoCube, whether data target or
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6.1 Types of InfoCubes Data targets
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After selecting at least one time d
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6.2.1 Repartitioning implementation
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You will then be presented with a w
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From within the monitor you are abl
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Once your repartitioning process is
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Figure 6-14 is displayed once you h
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When you remodel an InfoProvider yo
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Figure 6-17 demonstrates how you wo
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At this step of the process you are
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6.3.2 Benefits of remodeling InfoPr
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6.4.3 Cumulative data versus non-cu
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Important: After the initial compre
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► Use DPSIs for the cube’s E- f
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7.1 Differences between DataStore a
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Figure 7-1 shows the initial status
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4. By selecting the Create button,
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Partitioning and clustering are bot
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7.4.2 Choosing and changing the clu
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7.4.4 Partitioning a DataStore obje
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From the ABAP Dictionary: Utility f
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Figure 7-9 DB2/390 Storage Attribut
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partitioning was used. The CREATE T
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, "/BIC/RECORDMODE" POSITION( 00289
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Upon completion of the job, you wil
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| "/BIC/DIVISION" VARGRAPHIC (00000
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| sql: | DELETE FROM DDSTORAGE | WH
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| "/BIC/CRMEM_VAL" DECIMAL (000017,
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| DDL time(___8): .........4 millis
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8.1 Troubleshooting general system
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You need to ascertain: ► Which us
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Further information about the subje
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8.2 Analyzing load performance In t
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We use transaction ST03 → Expert
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Click the Details tab of the RSMO w
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Select the component of interest to
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Figure 8-11 All statistical records
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Figure 8-13 Single statistical reco
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Loading from a flat file You can av
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and right-click to select the Simul
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Note: You must activate the saving
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5. In the right-hand panel of the w
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If your query has long run times th
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that the query runs against → Mai
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If the main component of query perf
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► Display Statistics Data (to sho
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Select the appropriate button, ente
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Figure 8-29 Statement details To ch
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The ratio (ST04 statement cache “
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Figure 8-32 Visual Explain - SQL te
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8.5 SAP Query Analysis Tool The SAP
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Display of sql access path SQL quer
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The access path is displayed hierar
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The table information tab shown in
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DB2 Plan Table Figure 8-42 DB2 plan
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Graphical view of each query block
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Now you see the graphical view of t
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8.5.4 Example of using the query an
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9.1 The BIA architecture Figure 9-1
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Figure 9-2 BIA t-shirt sizing The B
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From the hardware side, the BIA is
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9.7 Overview The improvement of the
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10.1 SQL efficiency for DSO Queries
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The first join predicate is "/BIC/A
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Figure 10-5 Associate local predica
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Step 3 is repeated for each master
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Using the InfoCube query example in
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The first join predicate in Figure
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Thus, we have broken down the origi
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Figure 10-14 Comparing filtering Th
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AND "/BIC/AZOSASALE00"."PLANT" = "/
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Column Local or join CALMONTH Local
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10.4 Indexing of InfoCubes The defa
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Page 246 and 247: 11.1 Background To be more competit
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Page 256 and 257: 11.4 Test case scenarios The goal o
Page 258 and 259: Figure 11-3 explains the data flow
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Page 274 and 275: 12.1 Terminology: BI objects and pr
Page 276 and 277: Metadata plays a fundamental role i
Page 278 and 279: 12.3 Dataflow in SAP BI Data flow i
Page 280 and 281: 12.4 Information access As previous
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Page 286 and 287: 12.8 Aggregates 4. The dimension ta
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Page 334 and 335: IT scenario The environment we used
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Page 340 and 341: List of SAP BW OSS Notes Table C-1
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START CU091060 START CU0A1070 START
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Table name Average row length Total
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Table name Average row length Total
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Parameters BPK16K0 BPK16K1 VIRTUAL
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drwxr-xr-x 3 t11adm sapsys 2048 200
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Example D-6 shows a cube index crea
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B49/S_RTNSVAL 24 DECIMAL 17 2 N 4 N
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-rw-r--r-- 1 t11adm sapsys 2084482
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-rw-r--r-- 1 t11adm sapsys 547449 2
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Online resources These Web sites ar
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Help from SAP SAP Support and downl
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C Candidates for partiioning Data W
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M master data 155, 211, 258, 277 si
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star schema 265-266 also see InfoCu
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Best Practices for SAP BI using DB2
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Best Practices for SAP BI using DB2 9 for z/OS - IBM Redbooks

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