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

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11.5.1 Recommendations for configuration In summary, the primary objective of project Jupiter was to evaluate BI Accelerator scalability. To ensure that no hardware resource constraints were encountered, we took a conservative approach with some of the hardware capacity planning. Since the scale of our test environment is several magnitudes larger than the 28 blades supported prior to our project, there was a high level of uncertainty about the scaling effects. As a result, a few hardware components were highly oversized. Therefore, the configuration used in our project should not be used as a direct guideline for customer environments. See 11.5.2, “Help getting started” on page 252, for guidance. One exception was the BI Accelerator sizing used in our project. The general SAP rule-of-thumb for BI Accelerator sizing is to keep blade memory consumption by BI Accelerator indexes below 50% of the total memory on the blade servers. This is to ensure that sufficient memory is available on the blades to allow the query executions without causing performance issues. We adhered to this general guideline for our BI Accelerator blade configuration. The fast consistent query response times achieved during our project have further validated this guideline. To minimize exposure to known problems, it is important to keep current with SAP support packs and the DB2 maintenance level as identified in SAP notes 364109 (DB2 Put Levels) and 81737 (APAR List). It can be time-consuming to check that all required program temporary fixes (PTFs) listed in SAP Notes 364109 and 81737 have been applied to a z/OS system. SAP provides a tool called automated PTF checker to facilitate the checking. Read SAP note 183311 for details. 11.5.2 Help getting started To facilitate the BI Accelerator sizing process, SAP has provided an ABAP report that can be used to estimate the memory consumption of the BI Accelerator indexes. Refer to SAP Note 917803 for how to use this tool on the target BI system. Though SAP BI 7.0 is required for the BI Accelerator, the tool can be run on the older SAP BW Releases 3.0, 3.1, and 3.5, as well as BI 7.0. Note that since the tool analyzes all cubes, it may run for a long time and therefore needs to be scheduled accordingly. Contact SAP if there is any issue with the report or information in note 917803. 252 Best Practices for SAP BI using DB2 9 for z/OS
After a successful run of the tool, you have two options for where to send the report output: ► E-mail your output to Sizings@us.ibm.com4 . The Techline ISV sizing team will determine the appropriate size of blade configuration based on the memory requirement for the BI Accelerator index. An e-mail with the certified e1350 BI Accelerator configurations will be sent to the contact person. ► Contact an IBM Business Partner. Indicate the client's name and a contact name. The IBM Business Partner will work directly with you for sizing and delivery of the BI Accelerator configurations. Note that for both options, there are standard SAP BI Accelerator configurations, where all options are fixed. Besides the BI Accelerator blade configuration, it is also important to have a properly sized configuration for the rest of your SAP system landscape, including the database server, application servers, disk storage units, and network topology. For the proper sizing/configuration, contact the IBM technical sales specialist through your local IBM account team. 4 IBM Corp. 2006. How do I obtain a sizing for an IBM Systems Solution for SAP BI Accelerator (BI Accelerator) from SAP? http://www.ibm.com/support/techdocs/atsmastr.nsf/WebIndex/FQ117071 Chapter 11. Project Jupiter: large BI Accelerator scalability evaluation 253
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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
Page 220 and 221: 9.7 Overview The improvement of the
Page 222 and 223: 10.1 SQL efficiency for DSO Queries
Page 224 and 225: The first join predicate is "/BIC/A
Page 226 and 227: Figure 10-5 Associate local predica
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Page 230 and 231: Using the InfoCube query example in
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Page 238 and 239: AND "/BIC/AZOSASALE00"."PLANT" = "/
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Page 242 and 243: 10.4 Indexing of InfoCubes The defa
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Page 246 and 247: 11.1 Background To be more competit
Page 248 and 249: 11.2.1 Hardware and software config
Page 250 and 251: 11.2.2 Network infrastructure IBM S
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Page 254 and 255: As part of the pre-benchmark planni
Page 256 and 257: 11.4 Test case scenarios The goal o
Page 258 and 259: Figure 11-3 explains the data flow
Page 260 and 261: In addition, each cube, especially
Page 262 and 263: Measurement results Table 11-2 prov
Page 264 and 265: Figure 11-7 shows the average CPU u
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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 298 and 299: The content, depicted in Figure 12-
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Page 306 and 307: BI SAP Query Connector A resource a
Page 308 and 309: Business Intelligence Cockpit Web-b
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Page 314 and 315: Similar to the OLAP-standard term c
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Relational Query Model An abstracti
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SAP Business Information Warehouse
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source object element Component of
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elements to be displayed in the Web
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Web application object catalog Web
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You insert one or more queries in t
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IT scenario The environment we used
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Checks under z/OS and DB2 We recomm
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To check that the SAPCL procedure w
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List of SAP BW OSS Notes Table C-1
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SAP BI on DB2 for z/OS 390016 BW Da
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Network configuration: static multi
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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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