Recovering SAP applications on Linux

High Availability Clustering for SAP

LifeKeeper for mySAP.com, designed in collaboration with SAP AG, is specifically built to provide uninterrupted use of mySAP services. mySAP.com is composed of several cooperating services that may be run on a single server or may be distributed across several servers in a cluster. Some of these services have redundancy built into them, while others do not and represent single points of failure in the SAP environment.

LifeKeeper for mySAP.com protects and provide HA for production, development and test environments, all monitored and controlled from one management console.

LifeKeeper for mySAP.com overview

LifeKeeper for mySAP.com includes recovery capabilities that monitor and provide switchover for the SAP Central Instance (CI), including Enqueue and Message servers, and provides recovery capabilities for database, NFS and IP server components. LifeKeeper for mySAP.com provides support for DB2, Oracle and SAP DB, and enables virtualisation of IP addresses so that they can be moved between network cards in the cluster as needed. LifeKeeper for mySAP.com individually monitors the health status of key application resources, and is able to stop and restart the resource both locally or on another server in the cluster.

Supported High Availability Cluster Configurations

Within a single cluster, two major cluster configurations are supported that consist of two servers hosting the CI and DB with zero or more additional Application Servers (AS), and utilise shared file storage for database and application files:

1. CI and DB running on one server with failover to a second server.

2. CI and DB running on different servers, each backing up the other resource.

mySAP.com Health Monitoring & Recovery

LifeKeeper for mySAP.com monitors the health of the CI through the use of the sapinfo utility, and utilises the lgtst utility to monitor the message server. Upon detection of a problem, LifeKeeper will initiate the following recovery operations:Parallel Recovery -LifeKeeper for mySAP.com recovers mySAP.com and database servers in parallel, while preventing deadlock conditions by enabling restore of database service prior to mySAP.com in-service operation. This ensures correct recovery procedures.

Intelligent Switchback - LifeKeeper for mySAP.com enables the primary server to come back into service automatically, or manually with administrator intervention, as required.

mySAP.com Client Protection

LifeKeeper for mySAP.com supports the usage of a virtual server name for all client communication with the CI, thereby providing a switchable IP address that can be active on whichever server the CI is running. This enables users to connect without having knowledge of which server they are utilising.

System Requirements:

• SAP R/3
• Oracle, IBM DB2, SAP DB
• Linux Distribution: SuSE or RedHat

Wizard-Driven Configuration

LifeKeeper utilises intelligent wizards to automatically discover and configure mySAP.com hierarchies, and extend this hierarchy to backup servers. The LifeKeeper Java-based GUI enables management from any node within the network, and provides simple, convenient and easy implementation of the mySAP.com cluster.

SteelEye LifeKeeper at work for Infraserv Höchst

Infraserv Höchst is a leading integrated site operator and system provider for the chemical and life science industries. With proven know-how and a wide network of competencies, Infraserv enables customers to concentrate on their core business and so makes an important contribution to their success.Key to Infraservs service delivery capabilities is mySAP.com - well embedded as the standard for ERP B2B-Processes, Supply-Chain Processes and eBusiness scenarios.

Highly availability of mySAP.com is a must, since application downtime can cost InfraServe customers millions of Deutsche Marks in business downtime.

Infraserv IT group chose to run mySAP.com on Linux for cost and performance advantages. SteelEye LifeKeeper for mySAP.com, implemented by German system integrator Maxpert, provides the level of reliability, availability and performance their customers expect and demand from an enterprise site operator.

SteelEye LifeKeeper for mySAP.com provides high availability clustering support for the complete mySAP.com infrastructure - enabling failover services for critical and vulnerable components, and delivering a high level of reliability, dependability and serviceability.

For a seamless recovery of your SAP servers, SteelEye Life Keeper from Open Minds guarantees to provide you with a complete disaster recovery solution ensuring that you maintain business continuity. Our high availability solutions will grant continuous data protection providing data replication as well as the monitoring of all your SAP servers to ensure failover through the Java GUI.