Terminology
Firewall
Network firewalls control access between the internet and a corporation's internal network or intranet. Firewalls define which internet communications will be permitted into the corporate network, and which will be blocked. A well-designed firewall can foil many common internet-based security attacks.DMZ
The DMZ, which stands for DeMilitarized Zone consists of the portions of a corporate network that are between the corporate intranet and the Internet. The DMZ can be a simple one segment LAN or it can be broken down into multiple regions . The main benefit of a properly-configured DMZ is better security. In the event of a security breach, only the area contained within the DMZ is exposed to potential damage, while the corporate intranet remains somewhat protected.Load Balancer
Load balancers distribute an application's load over many identically configured servers. This distribution ensures consistent application availability even when one or more servers fail.Reverse Proxy
A reverse proxy server is an intermediate server that sits between a client and the actual web server and makes requests to the web server (origin server) on behalf of the client.Service
A service is a functional set of Oracle E-Business Suite application processes running on one or more nodes.Node
A node is referred to as a server that runs a set of E-Business Suite R12 application processes or database processes. In a single node installation of Oracle E-Business Suite, all the application processes including the database processes run on one node whereas in a multi node installation, the processes run on multiple nodes.Internal Applications Tier
The internal applications tier is the server configured for internal users to access Oracle E-Business Suite. It runs the following major application services:- Web and Forms Services
- WebLogic Administration service, Node Manager, Oracle HTTP Server, OPMN, WebLogic Managed Servers
- Concurrent Manager Services
- Reports and Discoverer Services
External Applications Tier
The external applications tier is the server configured for external users for accessing Oracle E-Business Suite. It runs the following application service:- Oracle HTTP Server
- WebLogic components like node manager, managed servers etc.
Primary Application Tier Node (or master node)
The application technology stack for Oracle E-Business Suite 12.2 utilizes WebLogic Server. The Primary Application Tier Node is the node that is running the WebLogic administration server.Secondary Application Tier Node (or slave Node)
The application technology stack for Oracle E-Business Suite 12.2 utilizes WebLogic Server. A secondary application tier node or slave node is a node in a multi-node deployment of Oracle E-Business Suite. The slave node does not run the WebLogic administration server.Shared Application Tier Filesystem
An application tier file system consists of:- APPL_TOP file system (APPL_TOP and COMMON_TOP directories).
- Application tier technology stack file system (OracleAS 10.1.2, Oracle WebLogic Server, and WebTier Oracle Homes).
- Instance Home (INST_TOP) file system. Each application tier and each file system edition ( run and patch) has a unique Instance Home associated with it.
- OraInventory directory, which stores information about all the components installed in various Oracle Homes
Multiple Domains
Multiple domains may defined to allow different users the ability to access Oracle E-Business Suite via different Web Entry Points.URL Firewall
URL Firewall is a white list of URLs, for the externally exposed E-Business Suite Modules, that may be accessed from the Internet.Java Object Cache (JOC)
The Java Object Cache provides caching for expensive or frequently used Java objects when the application servers use a Java program to supply their content. Cached Java objects can contain generated pages or can provide support objects within the program to assist in creating new content. The Java Object Cache automatically loads and updates objects as specified by the Java application.Java Object Cache (JOC) is used by some of the E-Business suite products to cache frequently used data at the Java layer. In order not to serve the stale data, the products rely on "cache-invalidation" messages between the various application tiers in the intranet and DMZ. When the application tier updates data that is part of cache data set, it will send cache invalidation messages to its peer application tier so that they can throw away their cache and lookup the updated data for their cache.