Understanding the HP Serviceguard Extension for Oracle E-Business Suite (SGeEBS)

EBS as Serviceguard package

SGeEBS requires EBS to be configured as two Serviceguard packages, a DB tier package and an

APPS tier package, SGeEBS provides two different set of scripts to configure DB and APPS tier

package. Each set is composed of required scripts with functions to start, stop, and monitor the

respective tier. The package configuration file declares the preferred nodes, disks/volume groups,

and subnets that the package will use. When a package is started, the package’s start command is

executed. When the package is up, a monitor script is run in the background to check that the EBS

DB and APPS tier-specific processes are still running. For example, in the case of the DB package, its

monitoring script consists of checking that the database listener and database processes are still up. If

the monitoring script detects that any component is no longer up, it triggers Serviceguard to

commence a package failover to a different node. The monitoring script of the APPS package

continuously loops through each applications tier service and checks that they are still up. These

services are the fulfillment server, applications tier listener, HTTP server, concurrent processing server,

forms server, and the OACORE server(s). If any of these processes are detected to be down, then the

monitoring script will exit, triggering Serviceguard to begin failing over the package to another server

node. In worst case scenarios both packages can run on one node. This makes it possible to deploy

the SGeEBS product on a cluster having a minimum of 2 nodes. When the package is either signaled

to stop or to fail over, the package’s stop command is run.

Figure 1 illustrates a basic two node SGeEBS configuration with sq-serv2 hosting the Oracle EBS

APPS tier and sq-serv1 hosting the DB tier. Both nodes are accessing a shared storage disk array.

Figure 1: A basic two node SGeEBS configuration

Resilient Networking

Serviceguard

Monitoring

sg-serv 2

APPS package

Shared Storage Disk

Array Subsystem

sg-serv 1

ebsdatabase

DB package

DB Tier Programs

and Data

Apps Tier Programs

and Data