real application cluster in a sap-environment1

Real Application Cluster in a SAP -environment.ppt

Real Application Cluster in a SAP-environment

Mathias Mangold, BASF IT Services GmbH

October 25, 2004


Mathias Mangold

Project SDC - Agenda

n Agenda

n Introduction BASF IT Services

n Project SDC

n Project reasons

n Project environment & milestones

n DataGuard & RAC

n SAP Standalone Enqueue Server with replication

n Implementation

n Go Live productive system

n Further activites

n Vision


Mathias Mangold

BASF IT ServicesIntroduction

n Creation of BASF pan-european IT organisation 02-Apr-2001n BASF IT Services B.V.

n Headquarters in Waedenswil, Switzerland

n Leading IT service provider within Europe for the

chemical industry


Mathias Mangold

BASF IT ServicesIntroduction

n Integration of european BASF IT organisations of:

n BASF AG, BASF Schwarzheide, Elastogran

n BASF Computer Services subsidiaries

n BASF IT Services Spain

n BASF IT Services Italy

n Major emphasis on growth through external business

n More than 20 locations in Europe, with own IT competence centres,

sales and marketing units

n More than 2,300 employees

n More than 442 Mio. euro turnover in 2003


Mathias Mangold

Project SDC: SAP Database Clustering

n Components of project „SAP Database Clustering“

n Database Clustering (RAC)

n DataGuard (Standby-Database)

n Elimination of all existing SinglePointOfFailures

n SAP Standalone Enqueue Server with Replication provides a HA solution

n Integration in HA/CMP takeover to provide a full HA level on operating system/ database/ SAP software

n stretched storage-subsystem cluster


Mathias Mangold

Project SDC – Project reasons

n Project reasons

n Cost reductions

n Use several medium size servers instead of one highend

n Scalability leading to more efficient use of hardware

n Flexibility to be gained by adding servers instead replacement

n Service improvement

n High Availability

n Ability to extend the scope of highend-systems (max. size)

n Transparancy (modifications have no effect on application)

n maintenance window negotiation


Mathias Mangold

Oracle RACèservice avail. & scalability

Standby Databaseè data availability

Replicated Enqueueè availability

dynamic loadbalancing (implemented)è availability

Streched Storage Cluster

Database Instance BDatabase Instance A

PCPC PCPC

Centr.Inst.

Appl.Srv.

Appl.Srv.

PCPC PCPC

Repl.CI

Appl.Srv.

Appl.Srv.

controlled integration into Verbundè availability

Project SDC – Layer of availability


Mathias Mangold

Project SDC - environment

n Project environment

n Application: SAP Rel. 4.6B (4.6D kernel) mit OCI-7-Library

n Database: Oracle V9i, 800GB, 2000 users

n Standby Database: ORACLE Dataguard

n Operatingsystem: IBM AIX 5.2 (64bit) + HA/CMP ES V4.5

n Filesystem: IBM GPFS V2.1 (2 phys. replica‘s)

n Server: IBM Pseries

n Storage: IBM ESS

n Project Team

n ORACLE, SAP, IBM and BASF IT Services


Mathias Mangold

Project SDC - milestones

n Project milestones

n Q2/2003 Start of Project

n DataGuard and SAP

n Q3/Q4 2003

n Correction of GPFS errors

n Load Tests

n Availability Tests

n Q1/2004 Training of all involved units

n Feb 04: Go Live RAC on development system

n April 04: Go Live RAC and DataGuard on productive system


Mathias Mangold

Positioning RAC and DATA GUARD

xXxDisaster

xXHuman Error

xXMedia Error

xXSystem Outage

Backup/ Recovery

Standby DB RAC/ Failover


Mathias Mangold

Project SDC - RAC

n RAC – Oracle Real Application Cluster

n RAC = Availability of service

n more than one database instance serves one database

n Hot 'Failover' solution

n in case of instance/ server failure system remains available with no data loss besides regular database crash recovery rules

n Shared Disk Cluster=> high available disk subsystem neccessary

n Reduction/ avoidance of planned/ unplanned system downtime

n Easy integration within SAP environment (transparency)


Mathias Mangold

Project SDC – R/3 and RAC

Node 2

SAP R/3Dialog Instances

Oracle Instance 1SID

Listener 1

Central Instance(ENQ, MSG-Server)

Node 1

Listener 2

Oracle Instance 2SID

SAP R/3Dialog Instances

Central Instance(Automatic failover with

Replicated Enqueue)

Automatic with Transparent Application Failoverstarting with SAP OCI-8 Kernel; R/3 WP Reconnect with SAP OCI-7 Kernel

CFS GPFS


Mathias Mangold

Project SDC - DataGuard

n DataGuard – Oracle Standby Database Solution

n DataGuard = Availability of data

n replaces current product Libelle to provide a standby database, (due to lack of RAC support)

n graceful switchover

n different levels of redo information transport possible

n maximum performance solution in use (lowest influence on productive system)

n all standby database advantages are also available with DataGuard (e.g consistency check of offline redo logs)


Mathias Mangold

Data Centre 1 Data Centre 2

Hard-ware

Data-base

SAPR/3

OS

Data-baseSDB

ApplicationServer

Data-baseProd

ApplicationServer

Central Instance

Databaseinstance

R/3-Appl.instanceR/3-Appl.

instanceR/3-Appl.instance









StandbyDatabase

ChangesChangesChanges

ChangesChanges

ApplicationServer

ApplicationServer

StandbyDatabaseServer

DatabaseServer

every5 min.

deferred recovery (period selectable)

immediatetransfer

Project SDC – R/3 and DataGuard


Mathias Mangold

Project SDC – SAP Enqueue Server

n SAP Standalone Enqueue Server with Replication

n SAP enqueue table is a single point of failure within SAP environment

n SAP Standalone Enqueue Server with Replicated Enqueue Server provides a HA solution

n Integration in HACMP takeover to provide a full HA level on operating system/ database/ SAP software

n Integration of SAP 620 SAP Standalone Enqueue Server within 46D environment possible


Mathias Mangold

Project SDC – SAP general

n Update Table Multiplexing

n Tables are handled seperately on each instance

n New RAC Monitor ST04N available from KB46C47, KB46D36, KB61039620, KB62039, KB64002

n OSS Note 705608, 716000

n BrTools support since 620, full support with 640

n Monitoring Report Adaptions for 46B


Mathias Mangold

Project SDC – Communication


Mathias Mangold

Project SDC – Go Live Productive System

n complete database export/import in 13 hours

n migration to new tablespace layout with enhanced support of RAC needs

n migration to RAC and SAP rename activites because of new hostnames finished in 3 hours

n very smooth migration, almost no notification through application


Mathias Mangold

Project SDC – current / further activities

n intensive system monitoring

n database performance (db request time within SAP R/3) improvement of more than factor 2

n correction of outstanding problems

n migration of other productive systems to RAC

n requests depend on current hardware enhancements and SLA requests

n evaluation DataGuard and SAP (without RAC)

n replacement of 'Libelle' - environment

n migration of next systems


Mathias Mangold

Project SDC

n Results

n Cost savings

n Reduction of Operating Costs *

n Enhanced service

n Availability

n Scalability

n Flexibility

* resulting from several activities that include usage of new hardware (server, storage etc.) as well as RAC.


Thank you for your attention


Contact

Mathias Mangold SAP-Basissupport Europe

BASF IT- Services GmbHJaegerstraße 1, D-67059 Ludwigshafen

Phone +49 621 60-49455Fax +49 621 60-21762

E-Mail [email protected]

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