Introduction

Oracle Coherence provides Oracle Insurance Policy Administration (OIPA) with replicated and distributed (partitioned) data management and caching services on top of a reliable, highly scalable peer-to-peer clustering protocol. The purpose of this document is to provide a comprehensive explanation of coherence and how it relates to OIPA.

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Overview

Coherence has no single point of failure. It automatically and transparently fails over and redistributes its clustered data when a server becomes inoperative or is disconnected from the network. When a new server is added, or when a failed server is restarted, it automatically joins the cluster, and Coherence transparently redistributes the cluster load. Coherence includes network-level fault tolerance features and a transparent soft re-start capability, enabling servers to self-heal.

There are two different scenarios for which OIPA employs Oracle Coherence:

1. Caching
2. Cycle Messaging