oracle rac on sap environment

Oracle9i RACfor SAP Customers

Agenda

Driving Forces Oracle9i RAC Architecture Oracle9i RAC Scalability Oracle9i RAC High Availability Oracle9i RAC and SAP’s MCOD Oracle9i RAC & Low Cost Technologies Oracle9i RAC Release Strategy

Driving ForcesDriving Forces

Driving Forces

Increased competition– Customers do not tolerate downtime– Management needs real-time information

System evolution– Growing amount of data– Changing workloads– Increasing complexity of IT landscapes– Increasing interaction between different systems

Driving Forces

Economic slowdown– Decreasing earnings– Need to improve margins– Less money available for investments

The Problem

More IT investments Less IT investments

IncreasedCompetition

SystemEvolution

EconomicSlowdown

The Solution

Get most out of existing resources– Opimize resource usage– Implement high availability solutions– Minimize administration costs

Protect existing, minimize new investments– Look for modularity and scalability of system

components– Look for low cost technologies

Simplify IT landscape (“consolidation”)

The Solution

For several years, consolidation was the only strategy to reduce costs.

Modularity, scalability and low cost technologies require distribution.

This means, that we need a new concept of systems design: Consolidated and integrated systems should be distributed to cheap and standardized components.

Oracle9i RACArchitectureOracle9i RACArchitecture

Standard Oracle Architecture

Instance

Database

Shared Nothing Architecture

DatabaseInstance

1

DatabaseInstance

2

DatabaseInstance

3

Table A

Table B

Table C

Shared Disk Architecture

DatabaseInstance

1

DatabaseInstance

2

DatabaseInstance

3

Table A

Table B

Table C

RAC Architecure

DatabaseInstance

1

DatabaseInstance

2

DatabaseInstance

3

Table A

Table B

Table C

Mirrored DiskSubsystem

Hig

h S

peed

In

terc

on

nect

CacheFusion

Oracle9i RACScalability

Oracle9i RACScalability

RAC Scalability

In the past, clustered databases (OPS)scaled well for specific types of applications:– Data Warehouse– Parallel-enabled OLTP

RAC with Cache Fusion delivers transparent scalability to all types of applications(including SAP applications)

RAC Scalability and SAP

In the past, the only way to scale the database server was to replace a small system by a larger system (“scale up”)

Oracle9i RAC provides an other option:add more small systems (“scale out”)

Benefits:– Protection of existing investments– Less new investments

mySAP.com Scalability

Presentation Application Database

mySAP.com/RAC Scalability

Presentation Application Database

Parallel SD Benchmark

Oracle9i RAC running on HP (Compaq) Tru64 3-tier system Finished: December 2001 Certified: June 2002

(2002029, 2002030, 2002031) Goal: Prove scalability with max. CPU

utilization

Parallel SD Benchmark

1 node 2 nodes 4 nodes0

2.000

4.000

6.000

8.000

10.000

12.000

Scalability: 1.8 Scalability: 1.8

Oracle9i RACHigh

Availability

Oracle9i RACHigh

Availability

Parallel Workload Study

Oracle9i RAC running on Windows 2000 2-tier systems Finished April 2002 Not intended for certification Goal: Prove scalability under conditions as

close as possible to real world environments(CPU util. between 33% and 70%)

RAC Scalability

100 SAP SD Users+ Oracle Instance 1




RAC Scalability + High Availability






UsersUsers Throughput(Dsteps/Hour)Throughput

(Dsteps/Hour) ScalingScaling

100 SD100 SD 35,36435,364

ConfigurationConfiguration

1 node1 node

200 SD200 SD 70,32070,320 1.991.992 nodes2 nodes

300 SD300 SD 103,482103,482 2.932.933 nodes3 nodes

400 SD400 SD 133,840133,840 3.783.784 nodes4 nodes

Phase 1: Scalability

400 SD400 SD 124,812124,8123 nodes3 nodes

Phase 2: High Availability


0%

50%

100%

150%

200%

250%

300%

350%

400%

100Users

1 Node

200Users

2 Nodes

300Users

3 Nodes

400Users

4 Nodes

400Users

3 Nodes

Total Throughput

Throughput/Node

Oracle9i RAC& SAP’s MCODOracle9i RAC

& SAP’s MCOD

MCOD

SAP requires more and more databases for their different modules.

The SAP modules in a mySAP.com landscape are not independent, e.g. SAP SD, SAP CRM and BW interact and share data.

To guarantee the required consistency within all these databases, SAP has developed MCOD (“Multiple Components in One Database”)

Typical mySAP.com Landscape

OracleInstance

1

OracleInstance

2

OracleInstance

3

OracleInstance

4

SAP R/3Instance

1

SAP R/3Instance

2

SAP CRMInstance

1

SAP BWInstance

1

mySAP.com and MCOD

OracleInstance

1

SAP R/3Instance

1

SAP R/3Instance

2

SAP CRMInstance

3

OracleInstance

2

SAP BWInstance

4

mySAP.com, MCOD & RAC

OracleInstance

1

OracleInstance

2

OracleInstance

3

OracleInstance

4

SAP R/3Instance

1

SAP R/3Instance

2

SAP CRMInstance

1

SAP BWInstance

1

mySAP.com, MCOD & RAC

With Oracle 9i RAC, nodes can be optimally customized for dedicated workloads(e.g. CRM, HR, SD, Retail, etc.).

With Oracle 9i RAC, OLTP, BW andbatch-centric modules can be fine tuned without affecting each other.

Only running all related SAP modules inone database guarantees the consistency, especially for backups.

Oracle9i RAC& Low-Cost

Technologies

Oracle9i RAC& Low-Cost

Technologies

Blades

Up to 600 CPUsper 19“ rack

Decreased spacerequirements: up to 7 times lessspace compared to classic servers

Decreased power requirements:up to 5 times less power consumption

Decreased cooling requirements: up to 5 times less cooling

Decreased price per CPU: up to 20 times less $/CPU compared to a classic 32-way server

Blades: Expected Savings

Company 1Company 1$500,000 to $1,000,000 per rack$500,000 to $1,000,000 per rack

Company 2Company 260% per server,90% of data center space (15m2 vs. 156m2)60% per server,90% of data center space (15m2 vs. 156m2)

Company 3Company 360% of data center space (19,000m2 vs. 48,000m2)= € 7,000,00060% of data center space (19,000m2 vs. 48,000m2)= € 7,000,000

Company 4Company 4reduction from $54 to $31 per userreduction from $54 to $31 per user

Blades & Oracle9i RAC

Blades have a high potential to cut cost Oracle runs on blades 800 SD users with Oracle on a 2-way,

Intel PIII, 800MHz, blade With Oracle9i Real Application Clusters

(RAC), blades can be clustered as instances of one database because of Oracle‘s shared disk architecture

Only Oracle 9i RAC can run on more than one blade with SAP

Grid Computing

Without Grid, systems have dedicated tasks. Each system has to be sized for worst case

peak load of his task. Under normal conditions, systems run over

hours with low load. Potential CPU power is wasted, because

unused.

Grid Computing

Example 1: Retail Within the normal business

hours the system is under low load.

After business hours POS upload starts, new batch calculation starts, data collection and transfer to the BW systems starts. The system is now, but only a view hours, under the load it had to been sized for.

Retail

idle

Retail

idle

~ 50% idle

Grid Computing

Example 2: CRM Within the normal business

hours, the system is under load it was sized for.

After business hours it runs with low load till the next business day.

CRM

CRM

idle

idle

~ 50% idle

Grid Computing

Grid to minimize unused resources. Because different systems have different

resources requirements at different points in time, free resources can be shared.

With Oracle Real Application Clusters (RAC),additional database nodes can be added up on demand.Example: Remove a database node from the CRM system and assign it to the Retail system for POS uploads.

Grid Computing

~ 50% idle ~ 25% idle

Retail

idle

Retail

idle

CRM

idle

CRM

idle

idle

Retail

CRM

idle

CRM

Retail

Centralized Storage

Storage Area Network (SAN) or Network-attached Storage (NAS)

Separates storage from the traditional server and puts it on special appliances

Provides a common storage pool that is highly scalable and flexible

Centralized Storage

Centralized storage matches the capabilities offered by blades and RAC:– Small computing units without local disk– Shared disk storage (RAC)

No Oracle Cluster File System required, if NAS is used

Linux

What is it?– Open-source operating system.– Supported by many hardware vendors.– Supported by many software vendors.– Increasing market share as server

operating system.

Linux

Why can it save money?– Low-cost operating system.– Low-cost third-party software.– Homogeneous SW environment for

heterogeneous HW (e.g. Linux on Blades or nearly any Intel based HW).

– Low-cost training.

Source: IDC White Paper “Maximizing the Business Value of EnterpriseDatabase Applications on a Linux Platform” (2002)

Linux Today Linux scales very well in SMP systems up

to 4 CPU’s. Linux on 8 CPU’s is still competitive, but between

4way and 8way systems the price per CPU increases significantly.

For SMP systems with more than 8 CPU’s, classic Unix systems are the best choice.

With Oracle Real Application Clusters (RAC),small 4 or 8way systems can be clustered to cross the today’s Linux limitations.

Commodity, inexpensive 4way Intel boxes, clustered with Oracle 9i RAC, help to reduce TCO.

Linux

Oracle has a strong commitment to support Linux.

Oracle 9i RAC for SAP certification on Linux has already been started by HP, Dell, Fujitsu-Siemens.

Oracle 9i RAC for SAP will be certified for RedHat and Suse.

Release StrategyRelease Strategy

Release Strategy

SAP has– agreed to adopt, distribute and support Oracle9i

RAC (May 2002)– certified a series of SD Parallel benchmarks

using Oracle9i RAC on HP (Compaq) Tru64 Unix (May 2002).

RAC will be generally available for customers on HP (Compaq) Tru64 Unix within 6 months.

Release Strategy

Benchmark Pilot Customer(s) AvailabilityTrue64

Linux Benchmark Pilot Customer(s) Availability

Benchmark Pilot Customer(s) AvailabilityAIX

HP-UX

Solaris

Benchmark Pilot Customer(s) Avail

Benchmark Pilot Customer(s) Avail

Benchmark Pilot Customer(s) AvailWindows