A tier is a logical grouping of services,
potentially spread across more than one physical machine. The three-tier
architecture that comprises an Oracle E-Business Suite
installation is made up of the database tier, which supports
and manages the Oracle database; the application tier, which
supports and manages the various Oracle E-Business Suite components, and is
sometimes known as the middle tier; and the desktop tier,
which provides the user interface via an add-on component to a standard web
browser.
A machine may be referred to as a node, particularly in the context of a group of computers that work closely together in a cluster. Each tier may consist of one or more nodes, and each node can potentially accommodate more than one tier. For example, the database can reside on the same node as one or more application tier components. Note, however, that a node is also a software concept, referring to a logical grouping of servers.
Centralizing the Oracle E-Business Suite software on the application tier eliminates the need to install and maintain application software on each desktop client PC, and also enables Oracle E-Business Suite to scale well with an increasing load. Extending this concept further, one of the key benefits of using the Shared Application Tier File System model (originally Shared APPL_TOP) is the need to maintain only a single copy of the relevant Oracle E-Business Suite code, instead of a copy for every application tier machine.
On the database tier, there is increasing use of Oracle Real Application Clusters (Oracle RAC) , where multiple nodes support a single database instance to give greater availability and scalability.
A machine may be referred to as a node, particularly in the context of a group of computers that work closely together in a cluster. Each tier may consist of one or more nodes, and each node can potentially accommodate more than one tier. For example, the database can reside on the same node as one or more application tier components. Note, however, that a node is also a software concept, referring to a logical grouping of servers.
Centralizing the Oracle E-Business Suite software on the application tier eliminates the need to install and maintain application software on each desktop client PC, and also enables Oracle E-Business Suite to scale well with an increasing load. Extending this concept further, one of the key benefits of using the Shared Application Tier File System model (originally Shared APPL_TOP) is the need to maintain only a single copy of the relevant Oracle E-Business Suite code, instead of a copy for every application tier machine.
On the database tier, there is increasing use of Oracle Real Application Clusters (Oracle RAC) , where multiple nodes support a single database instance to give greater availability and scalability.
No comments:
Post a Comment