Compaq Parallel Database Cluster Model PDC/O1000 for Oracle8i and Windows 2000 Administrator Guide

Cluster Software Components 3-5
Compaq Confidential – Need to Know Required
Writer: John Blackburn Project: Compaq Parallel Database Cluster Model PDC/O1000 for Oracle8i and Windows 2000 Administrator Guide
Comments:
Part Number: 225083-002 File Name: d-ch3 Cluster Software Components.doc Last Saved On: 6/11/01 11:20 AM
Compaq Operating System Dependent Modules
Compaq supplies low-level services, called operating system dependent
modules (OSDs), which are required by Oracle8i Parallel Server. The OSD
layer monitors critical clustering hardware components, constantly relaying
cluster state information to Oracle8i Parallel Server. Oracle8i Parallel Server
monitors this information and takes pertinent action as needed.
For example, the OSD layer is responsible for monitoring the cluster
interconnect of each node in the cluster. The OSD layer determines if one of
the nodes is no longer responding to the cluster heartbeat. If the node still does
not respond, the OSD layer determines it is unavailable. The OSD layer evicts
the node from the cluster and informs Oracle8i Parallel Server.
Oracle8i Parallel Server recovers the part of the database affected by that
node, and reconfigures the cluster with the remaining nodes.
OSDs for Oracle8i Parallel Server
For a detailed description of how the OSD layer interacts with
Oracle8i Parallel Server, refer to the Oracle8i Parallel Server Setup and
Configuration Guide. Also refer to “Installing Compaq OSDs” in Chapter 5,
“Installation and Configuration.”
The OSD software is found on the Compaq Parallel Database Cluster
Clustering Software for Oracle8i on Microsoft Windows 2000 CD. This CD is
provided in the cluster kit for the PDC/O1000.
Oracle Software
The PDC/O1000 supports Oracle8i software. If you are using a release other
than Oracle8i Release 8.1.7, confirm that the release has been certified for the
PDC/O1000 on the Compaq website at
www.compaq.com/solutions/enterprise/ha-pdc.html
Oracle8i Server Enterprise Edition
The Oracle8i Server Enterprise Edition provides the following:
■ Oracle8i Server
■ Oracle8i Parallel Server Option
■ Oracle8i Enterprise Manager