IBM DB2 specific SAP NetWeaver
Business Warehouse Near-Line Storage Solution
Karl Fleckenstein (karl.fleckenstein@de.ibm.com)
IBM Deutschland Research & Development GmbH
June 22, 2011
© 2011 IBM Corporation
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
Agenda
• SAP NetWeaver BW Near-Line Storage (NLS)
• IBM DB2 specific SAP NetWeaver BW NLS solution
– DB2 solution
– Integration
– Performance
• Summary and additional information
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
Challenges for Business Applications and Databases
Amount of data increases
– More users
– More data sources
– More and new types of data (e.g. Point of Sales
(POS), Radio Frequency Identification (RFID))
t
– New business transactions
System performance
– Increasing query response times
– Increasing time for data processing, e.g. ETL
– Increasing time for database administration & operation
e.g. performing backups, table/index reorganization
Increasing costs
– DB Server
– Storage
– High Availability (HA) &
$€£
Disaster Recovery (DR) solution
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
Address the Challenges with Near-Line Storage
Reduce amount of data in online database
–
–
–
–
–
–
Faster query processing
Online
Faster and smaller backups
Storage
Reduced data volume on HA and DR site
Reduced administration effort
Retain existing hardware infrastructure
Reduce costs
Near-Line Storage (NLS) = Near (On)Line Storage
– Move aged data to NLS
– NLS data can be stored on less expensive
Near-Line
infrastructure
Storage
– Lower HA requirements, less frequent backups
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
Information Lifecycle Management – Types of Data Storage
Frequent data access
• Actual data
• Online data access
• Read/Write/Update/Delete
Online
Storage
Near-Line
Storage
Data
Archiving
Less frequent data access
• Aged data
• Online data access
• Read-Only
Very rare access to data
• Long term storage
• No online data access
• Read-Only
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP NetWeaver BW NLS – General
•
•
•
SAP BW NLS solution is integrated into SAP data archiving stragegy (SAP Archiving
Development Kit = SAP ADK)
SAP BW InfoProviders can be archived with a Data Archiving Process (DAP)
Options to archive SAP BW data:
– Archive to Data Archive only (SAP ADK)
– Transfer to Near-line Storage only
– Archive / transfer to both, SAP ADK and NLS
Online Database
Near-Line Storage =
“Near Online” Storage
Infrequently read data
(aged)


Very rarely read data
(aged)


Data Archiving
Process

Online
BW Data
Frequently read/changed
data (actual)
Classic Archive
Data location:
 optimal
 tolerable
 unacceptable

Data-Archive
(SAP ADK)
Near-Line Storage
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP NetWeaver BW NLS – Data Transfer
•
•
•
Request based data transfer from SAP
BW objects to NLS objects
Process steps of the NLS data transfer
– Read data from BW InfoProvider
(BW database) in data packages
– Write data into Near-Line Storage
object
– Data verification: compare NLS
data with BW data
– Delete transfered data in the BW
InfoProvider (BW database)
Reload of NLS data into BW database
for modification purpose
TransparentAccess
Access
Transparent
SAP NetWeaver BW
BI OLAP
BW
OLAP
BI Data
Manager
DBInterface
Interface
DB
Layer
Layer
DBMS
Relational DB
DB
Relational
Interface
Interface
BW Online Data
General
NLS
General
Near-Line
Interface
Interface
TREX
NLS /Partner
DB2 LUW
Near-Line
Interface
Interface
Near-Line Storage
2011
2010
2009
2008
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP NetWeaver BW NLS – Data Archiving Process (DAP)
• DAP with NLS archiving
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP NetWeaver BW NLS – Data Archiving Process (DAP)
• Definition of the NLS archiving criteria: time and optional additional criteria
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP NetWeaver BW NLS – NLS Request
• Create and monitor an NLS data archiving request
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP NetWeaver BW NLS Solution – Data Access
SAP BW Query / Data extraction
•
•
•
•
•
Online access to both BW and NLS data
BW OLAP processor splits query into two
parts and sends it to the BW Online Database
and to NLS
BW OLAP processor calculates final result
SAP BW 7.0x query access specification
– On query level with transaction rsrt
– On InfoProvider level (DB2 LUW
specific)
SAP BW 7.3 query access specification
– In query selection screen
– In BEx Query Designer
– On Multi-Provider level
– On InfoProvider level
TransparentAccess
Access
Transparent
SAP NetWeaver BW
BI OLAP
BW
OLAP
BI Data Manager
DBInterface
Interface
DB
Layer
Layer
DBMS
Relational DB
DB
Relational
Interface
Interface
BW Online Data
General
NLS
General
Near-Line
Interface
Interface
TREX
NLS /Partner
DB2 LUW
Near-Line
Interface
Interface
Near-Line Storage
2011
2010
2009
2008
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
NLS Positioning within the SAP NetWeaver BW Solution
The NLS concept complements
with the SAP NetWeaver
Business Warehouse
Accelerator (BWA), keeping
aged data away from the
valuable SAP NetWeaver BWA
and BW Online Database
TransparentAccess
Access
Transparent
SAP NetWeaver BW
BW OLAP
Business
Warehouse
Accelerator
DB Interface
BWA
Interface
Database
Interface
Near-Line
Storage
Interface
Near-Line
Storage
BW
Online
Database
Data Access: very frequently
frequently
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Karl Fleckenstein, IBM Deutschland R&D
not frequently
© 2011 IBM Corporation
Agenda
• SAP NetWeaver BW Near-Line Storage (NLS)
• IBM DB2 specific SAP NetWeaver BW NLS solution
– DB2 solution
– Integration
– Performance
• Summary and additional information
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP BW NLS Solution with IBM DB2 for LUW
•
Separate DB2 database used to store NLS
data
•
IBM DB2 specific NLS partner interface
implemented
•
•
•
•
SAP NetWeaver BW
Access via SAP ABAP secondary
connection
SAP BW Unicode systems only
Supported DB2 release for NLS: DB2 V9.7
BW
OLAP
BI Data
Manager
DBInterface
Interface
DB
Layer
Layer
DBMS
General
NLS
General
Near-Line
Interface
Interface
TREX
NLSNear-Line
/ DB2 LUW
DB2
Interface
Interface
Relational
DB
Relational DB
InterfaceInterface
Proven IBM DB2 features are used
–
–
–
–
–
BI OLAP
Automatic Storage
Self Tuning Memory Management
Compression
Multi-Dimensional Clustering (MDC)
Database Partitioning Feature (DPF) is
optional
BW
database
InfoCube
2009
2008
2007
DSO
2009
2008
2007
2006
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Karl Fleckenstein, IBM Deutschland R&D
NLS / DB2
database
InfoCube
2006
2005
2004
2003
DSO
2005
2004
2003
© 2011 IBM Corporation
SAP BW NLS on DB2 – Delivery & Support
•
Delivery with SAP NetWeaver BW 7.01 SP6;
DB2/NLS solution is part of SAP BW
•
SAP NetWeaver BW
Included in SAP IBM DB2 OEM license at
no extra cost
•
Same SAP support channel as SAP BW on
IBM DB2 solution
•
NLS / IBM DB2 database can be connected
to SAP BW systems running on other (nonIBM DB2 for LUW) databases
BI OLAP
BW
OLAP
BI Data
Manager
DBInterface
Interface
DB
Layer
Layer
DBMS
General
NLS
General
Near-Line
Interface
Interface
TREX
NLSNear-Line
/ DB2 LUW
DB2
Interface
Interface
Relational
DB
Relational DB
InterfaceInterface
BW
database
InfoCube
2009
2008
2007
DSO
2009
2008
2007
2006
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Karl Fleckenstein, IBM Deutschland R&D
NLS / DB2
database
InfoCube
2006
2005
2004
2003
DSO
2005
2004
2003
© 2011 IBM Corporation
SAP BW NLS on DB2 – Set-Up Alternatives
•
Separate NLS database for each SAP BW system
– Pros: NLS performance on DB level, independent database recovery
– Cons: More administration effort with more NLS databases, e.g. db backups
Test
System
BW1
database
•
NL1
BW2
database
Production
System
NL2
BW3
database
NL3
One NLS database for several SAP BW systems
Seperate database schema on the NLS database for each SAP BW system
– Pros: Less administration effort
– Cons: Other SAP BW systems impacts NLS performance, no access to all NLS systems
during NLS database recovery
Test
System
BW1
database
•
Quality
System
Quality
System
BW2
database
Production
System
BW3
database
NLS Database
Schema
db2nl3
Schema
db2nl2
Schema
db2nl1
Meaningful NLS database set-up
– Separate NLS database for production system
– Shared NLS database for test & quality systems
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP BW NLS on DB2 – Operation (1)
• Operation of the NLS / IBM DB2 solution with existing DB2 DBA skill (no
new technology introduced)
• Administration & Monitoring with SAP DBACockpit
• Database backups of the NLS system can be performed in less frequent
intervals using different infrastructure (e.g. Flash copy vs. tape)
BW
database
NLS / DB2
database
tape
tape
tape
tape
tape
Flash
Copy
Flash
Copy
Flash
Copy
Flash
Copy
Flash
Copy
tape
tape
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Karl Fleckenstein, IBM Deutschland R&D
t
© 2011 IBM Corporation
SAP BW NLS on DB2 – Operation (2)
• Synchronized NLS recovery process
– Advised process for NLS database recovery
• Status information of an NLS request is stored in the SAP BW
datatabase
– Automatic corrections of data inconsistency (if appropriate)
– Automatic data consistency check
tape
Point in Time 1
BW
database
Restore
Restore
NLS / DB2
database
Roll forward
time
Roll forward
Point in Time 2
tape
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP BW NLS on DB2 – SAP Operations
• Data Archiving Processes (DAPs) can be transported within
the SAP system landscape
– Prerequisite: Same NLS connection name on source and target system
Test
System
DAP1, DAP2,
db6nls
BW
database
NL1
Production
System
DAP3
db6nls
BW
database
NL2
• SAP System Copy
– Target system has no NLS access after system copy (per default)
– SAP DBA Cockpit support for simple verification and reconnect to NLS DB
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP NetWeaver BW NLS – Supported SAP BW Objects
Supported SAP BW objects
•
InfoCubes
– Standard InfoCubes
– Real-time Infocubes
– SAP BW 7.0x (x = 1,2,..): SAP BW compression is needed before data can be transferred to NLS (data transfer
from E fact table)
SAP BW 7.3: SAP BW compression is no longer a prerequisite (data transfer from F fact table is possible)
•
•
•
–
DataStore Objects (DSO)
– Standard DSOs
– Write-optimized DSOs
– DSOs for direct update
MultiProvider support
– SAP BW 7.0x (x = 1,2,..): Modeling solution with VirtualProviders is available supported by an ABAP tool
– SAP BW 7.3: Native support
Semantically Partitioned Objects (with 7.3)
Not supported SAP BW objects
• Non-cumulative InfoCubes
• PSA tables, but
– SAP recommendation: Do not use PSA tables for long-term SAP BW data, instead use write-optimized DSOs
(which are supported for NLS)
•
InfoSets
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP NetWeaver BW NLS on DB2 – InfoCube Table Layout
NLS InfoCube
SAP BW InfoCube
M1
M2
M3
T1
MDkey
MDkey MDkey MDkey
MDkey
MDkey MDkey
MDkey
MDkey
MDkey
MDkey
MDkey
S7
S8
SID
SID
SID
SID
S1
S2
S3
S4
S5
S6
X1
SID
SID
SID
SID
SID
SID
SID
SID
SID
SID
SID
SID
SID
Product
Area
Customer
DIMID
DIMID
DIMID
Simple Star-Schema
– One fact table with DB2 Multi-Dimensional
Clustering (MDC)
• On Arch-Request column
• Other MDC columns are derived from
SAP BW fact table
– Arch-Request is an additional dimension
MDKey MDKey MDKey
MDKey
MDKey MDKey MDKey
Product
Area
Customer
PKey
PKey
PKey
DIMD DIMID DIMID DIMD DIMID DIMID
Key
E
Key
DIMID
DIMID
DIMID
Package
Time
Unit
SID
SID
SID
SID
SID
SID
Key
Req-ID State
Key
Fact
DIMID DIMID DIMID DIMID DIMID DIMID
SID
Key
Time
Arch-Request
Key
F
PKey
Key
PKey
PKey
PKey
Package
Time
Unit
MDKey MDKey
MDKey MDKey
MDKey MDKey MDKey
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP NetWeaver BW NLS on DB2 – DataStore Table Layout
BW DataStore Object (DSO)
NLS DataStore Object (DSO)
Standard DataStore Object
•
Archiving request information is stored
in the addtitional Arch-Request table
Change
Log
•
NLS DSO table with MDC
Activation
Queue
Active
Table
– On Arch-Request column
– Other MDC columns are derived
from SAP BW DSO table
Req-ID State
Time
Arch-Request
PKey
Write-optimized DataStore Object
Key
WriteOptimized
DSO
NLS DSO
Table
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP NetWeaver BW NLS on DB2 – MultiProvider Support
SAP BW 7.0x
SAP BW 7.3
•
•
Modeling solution with VirtualProviders
One VirtualProvider for all InfoProviders
•
Native MultiProvider support without
additional modeling of VirtualProviders
•
One VirtualProviders for each
InfoProvider; tool support to create
VirtualProviders (DB2 specificSAP note
1566019)
•
New property to specify NLS access
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
Agenda
• SAP NetWeaver BW Near-Line Storage (NLS)
• IBM DB2 specific SAP NetWeaver BW NLS solution
– DB2 solution
– Integration
– Performance
• Summary and additional information
25
Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP NetWeaver BW NLS on DB2 – Integration
• NLS database installation fully
integrated into SAP Installation Tool
SAPInst
• NLS Enhancements in SAP‘s DBA
Cockpit DBACockpit
– Configure connection to
NLS/DB2 database
– Administration and monitoring of
User
db2nl1
NLS/DB2 database
– Backup of NLS database
– Space consumption of NLS
objects
BW
database
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Karl Fleckenstein, IBM Deutschland R&D
NLS / DB2
database
© 2011 IBM Corporation
SAP NetWeaver BW NLS on DB2 – Installation of NLS DB
• NLS / DB2 database
installation with SAP’s
installation tool SAPInst
• SAPInst creates separate
DB2 Instance and DB2
database for Near-Line
Storage
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP NetWeaver BW NLS on DB2 – Installation of NLS DB
• Connect to NLS database
• Supported within SAP’s database administration tool DBACockpit
NLS Database
Schema: DB2NL1
User
db2nl1
InfoCube
DSO
2004
2003
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Karl Fleckenstein, IBM Deutschland R&D
2003
© 2011 IBM Corporation
SAP NetWeaver BW NLS on DB2 – NLS Administration
• NLS / DB2 administration and monitoring is integrated into SAP’s database
administration tool DBACockpit
• Use of existing DBACockpit
functionality for administration
and monitoring of remote
databases (NLS database):
– Administration of Remote
Tablespaces
– Backup of remote databases
29
Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP NetWeaver BW NLS on DB2 – NLS Administration
• NLS / DB2 administration and monitoring is integrated into SAP’s database
administration tool DBACockpit
• Use of existing DBACockpit
functionality for administration
and monitoring of remote
databases (NLS database):
– Administration of Remote
Tablespaces
– Backup of remote databases
• NLS specific extensions of the
DBACockpit
– NLS Configuration
– NLS Objects Overview
– NLS Synchronisation Check
30
Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP NetWeaver BW NLS on DB2 – Monitoring of NLS DB
• Analyse SAP BW InfoProviders and
the corresponding NLS objects
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP NetWeaver BW NLS on DB2 – Monitoring of NLS DB
• Analyse SAP BW InfoProviders and the corresponding NLS objects
32
Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP NetWeaver BW NLS on DB2 – Monitoring of NLS DB
• Analyse SAP BW InfoProviders and the corresponding NLS objects
33
Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
Agenda
• SAP NetWeaver BW Near-Line Storage (NLS)
• IBM DB2 specific SAP NetWeaver BW NLS solution
– DB2 solution
– Integration
– Performance
• Summary and additional information
34
Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP BW NLS on DB2 – Test Environment
System
configuration
SAP BW
NLS
Ratio
DB Server DB Server NLS / BW
Amount of disk
spindles
192
96
RAM size, GB
64
32
CPU architecture POWER 7 POWER 6
Threads per core
4
2
CPU cores, total
6
4
CPU threads, total
24
8
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Karl Fleckenstein, IBM Deutschland R&D
50%
50%
--50%
67%
33%
© 2011 IBM Corporation
SAP NetWeaver BW NLS on DB2 – Data Transfer Performance
Test scenario
• InfoCube has 745 Million records
• Transfer 500 Million records from BW to NLS
SAP NetWeaver BW
10 CPU Cores, SMT=4
64 GB Memory
(POWER7, 3.3 GHz)
Results
• Copy + verification performance, records per hour:
– with 8 parallel processes / archiving runs :
114 Million records / hour
–
with 15 parallel processes / archiving runs:
185 Million records / hour
• Delete performance (with MDC on the Time
BW DB Server
NLS DB Server
- Data on 7 DB2
partitions
- MDC on time
- Data on 8 DB2
partitions
- MDC on time
6 CPU Cores, SMT=4
64 GB Memory
(POWER7, 3.3 GHz)
Dimension) :
–
1 process is running: 546 Million records / hour
Overall performance for the complete data
transfer to NLS:
Copy + verification + deletion
135 Million records / hour
Parameter
name
Average user
CPU load
4 CPU Cores, SMT=2
64 GB Memory
(POWER6, 3.5 GHz)
SAP
SAP
Application database
server
server NLS server
10 cores,
40 threads
6 cores,
24 threads
4 cores,
8 threads
56%
14%
48%
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP NetWeaver BW NLS on DB2 – BW Query Performance (1)
Test Description
pSeries P570, Power 6, 3.5 GHz
• Fact table has 350 Million rows
• SAP BW Queries
– Aggregation of 65 Million rows
– 2000 rows returned
LPAR1: 4 Cores,
32 GByte
DB Partition 0
DB Partition 1
DB Partition 2
DB Partition 3
DB Partition 4
DB Partition 5
DB Partition 6
• Test Scenarios
– 1 and 2 Queries read data from BW database
– 1 and 2 Queries read data from NLS database
DB Partition 7
pSeries P570, Power 6, 3.5 GHz
LPAR1: 4 Cores,
32 GByte
with 8 database partitions
– 1 and 2 Queries read data from single-partitioned
NLS database
DB Partition 0
– Each query read different time intervals
37
Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP NetWeaver BW NLS on DB2 – BW Query Performance (4)
• Effect of DB2 database partitioning on NLS System – Scalability
• In general: SAP BW query performance scales with number of DB2 db partitons
Query Run Time
363
Seconds
296
50
65
58
33
BW only
NLS only
NLSonly
(7 db partitions,
6 cores, 24 threads)
(8 db partitions
4 Cores, 8 threads)
(1 db partitions
4 Cores, 8 threads)
38
Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP NetWeaver BW NLS on DB2 – Scalability
Flexibility of the NLS hardware environment, according to individual needs
•
•
•
IBM DB2 database partitioning feature (DPF) allows to grow the environment
Flexible - From Cost Sensitive to Maximum Throughput
Possibility to grow with amount of NLS data
39
Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
Agenda
• SAP NetWeaver BW Near-Line Storage (NLS)
• IBM DB2 specific SAP NetWeaver BW NLS solution
• Summary and additional information
40
Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
Summary
Why DB2 specific NLS for SAP NetWeaver BW?
Criteria
SAP BW NLS on DB2
Delivery
With SAP BW Releases; part of standard SAP BW
Integration
Fully integrated into SAP tools (SAPInst, DBACockpit), which are
delivered with standard SAP BW and SAP Basis releases
Operation: Monitoring
Administration,
Backup, Recovery
- With SAP standard tools or DB2 tools
Compression
Data volume reduced typically by factor 3 to 5 compared to
uncompressed data
Performance
- Very fast data transfer to NLS
- Synchronized recovery process
- Parallel query processing
System Layout
Flexibel; depends on Performance & TCO requirements
Support
Use existing SAP/DB2 support channel
Needed Skill
Existing DB2 skill
TCO
Reduced TCO
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
SAP NetWeaver BW NLS on DB2 – Additional Information
News, Blogs, Backgrounds, Docs:
https://www.sdn.sap.com/irj/sdn/db6
Documentation “Enabling SAP NW BW to Use IBM DB2 for Linux, UNIX,
and Windows as Near-Line Storage“ available at:
http://service.sap.com/instguidesnw/
SAP NetWeaver 7.0 (2004s) -> Operations
SAP NetWeaver 7.3 -> Operations
SAP Note 1405664: DB6 Near-Line Storage Impl. (supplementary note)
available at SAP Service Market Place:
http://service.sap.com/notes
E-Learning Expert Session on IBM DB2 Near-Line Storage Solution for
SAP NetWeaver BW available at:
http://www.sdn.sap.com/irj/sdn/db6?rid=/webcontent/uuid/400c5e34-c601-2c10-6cb4-9aff67ca31c3
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation
Thank you for attending!
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Karl Fleckenstein, IBM Deutschland R&D
© 2011 IBM Corporation