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Glossary
This Glossary contains definitions of terms used throughout the HACMP Smart Assist for Oracle documentation set. General familiarity with AIX 5L and networking terms and commands is assumed.
For general terms used in HACMP and for HACMP usage of some specific AIX 5L terms and commands, see Master Glossary for HACMP.
For additional information on the Oracle terminology, see the section on Accessing Publications in About This Guide.
A
Active Failover Cluster (AFC)
An active failover cluster consists of nodes that are all active and ready to provide services that are channeled through a load-balancer and/or router.
Apache JServ Protocol (AJP)
The AJP protocol is a packet-based protocol that allows Oracle HTTP Server (OHS) to communicate with OC4J instances.
Application Server (AS)
The Oracle Application Server consists of various components that provide solutions for developing, integrating and deploying enterprise applications.
B
Oracle Business Intelligence Beans (BI Beans)
A set of standards-based JavaBeans™ that provides data-aware application building blocks designed for use with Oracle OLAP.
C
Cold Failover Cluster (CFC)
A Cold Failover Cluster consists of one primary node that serves requests and one or more failover nodes. At any given time only one node in such a cluster is active and manages all system resources.
D
Database (DB)
An Oracle database usually refers to the database files (such as control files, redo-log files and data files) and a set of processes that manage them along with various system mechanisms (such as shared memory and semaphores).
Distributed Configuration Management (DCM)
The DCM system distributes configuration information across components in an Oracle cluster.
Demilitarized Zone (DMZ)
The DMZ in a networking context refers to one or more computers that are outside the firewall. These computers/servers broker requests from outside (Internet) as well as from the rest of the local area network.
F
fallback
The process of a joining or reintegrating node acquiring Oracle resources previously owned by another node. You can specify a fallback policy for a resource group. See also fallover.
fallover
The process of an active node acquiring Oracle resources previously owned by another node, in order to maintain availability of those resources. You can specify a fallover policy for a resource group. See also fallback.
H
HACMP Smart Assist for Oracle
This is the Smart Assistant for Oracle Application Server and Oracle Database Server.
hostname
A system in a non-HACMP environment is typically identified by a hostname, which is itself tied to a network interface. Since a system usually has only one network interface, the hostname uniquely identifies the system.
A cluster node has more than one network interface and therefore more than one hostname. To avoid ambiguity, each node in an HACMP cluster is identified by a user-defined node name, which is unique to that cluster.
hot standby configuration
A highly available cluster configuration of two nodes, where one node performs the work while the other node waits as a fallover location.
I
Infrastructure Tier
Consists of two parts: Oracle AS Metadata Repository and Oracle Identity Management (IM). Together, they provide centralized metadata, management, and security services for Oracle Application Server components.
J
Java 2 Platform Enterprise Edition (J2EE)
This is a specification for Java 2 platform with regards to developing component-based multi-tier applications. This specification provides Java interfaces that applications use in order to compile and run them independent of the actual J2EE Application Server implementation.
Java Messaging Service (JMS)
One of the J2EE components involved in relaying messages (point-to-point or publish-subscribe types) between Java objects via TCP/IP is the Java Messaging Service.
Journaled Filesystem (JFS)
AIX 5L facility that uses database journaling techniques to protect the integrity of the filesystem metadata.
L
local node
Node on which you are logged in.
M
Metadata Repository (MR)
The Metadata Repository is one of the infrastructure components required in an Oracle Application Server installation. The repository consists of several tables that the rest of the application server components rely on. It can be created using Repository Creation Assistant (repCA).
Militarized Zone (MZ)
A militarized zone in the networking context refers to a local area network or a sub network behind a firewall that is not directly accessible by any computer on the internet.
N
Network Attached Storage (NAS)
A network attached storage device is a simple server that is dedicated to file sharing via various network-based (specifically, TCP/IP) protocols. A NAS can itself be made up of multiple NAS devices and so on.
O
Optimal Flexible Architecture (OFA)
This is an Oracle term that specifies how Oracle software and database-related files shall be organized in a file system.
Oracle Application Server Containers for J2EE (OC4J)
OC4J is the core J2EE runtime component of Oracle Application Server. OC4J runs on a standard file-based JDK 1.4 Java Virtual Machine and provides complete support for JSPs, Servlets, Enterprise JavaBeans (EJBs), Web services and all J2EE services.
Oracle Identity Management (IM)
Management services for Oracle Application Server components. Part of the Infrastructure Tier.
Oracle Internet Directory (OID)
This is an Oracle Application Server component that provides Lightweight Directory Access Protocol (LDAP) version 3 features. LDAP is a lightweight protocol used by clients for queries and modifications of a directory (such as a personnel) in an enterprise.
Oracle Process Manager and Notification (OPMN)
This is a utility set that is provided as part of Oracle Application Server installation to start, stop and monitor various components.
Oracle Universal Installer (OUI)
The Oracle graphical user interface tool used to ease the installation of the Oracle database software and its related components.
P
primary node
The highest priority node for a resource group is the first node that is listed in the default nodelist for any non-concurrent resource group.
private network
Oracle uses a private network for Oracle inter-node communications between some networks.
R
Real Application Cluster (RAC)
An Oracle Real Application Cluster consists of several database instance nodes clustered together with a storage area network to provide a highly available database. RAC is a major component in the grid technology of Oracle database.
remote node
This is a node in the cluster other than the local node.
Repository Creation Assistant (RepCA)
RepCA is a utility used for installing and or de-installing the metadata repository into a back end database. It can also be used to register and or unregister a database with Oracle Internet Directory.
S
Single Sign On (SSO)
Single Sign On is one of the components of Oracle Application Server. It provides single authentication/sign-on for multiple web-based applications that are part of an Application Server.
Smart Assist for Oracle (SA)
This is the HACMP Smart Assist for Oracle Application Server and Oracle Database Server.
standby node
The node where the application runs after a fallover from the primary node. See primary node.
Storage Area Network (SAN)
In a storage area network a back end switch handles all storage-related traffic from servers to the storage devices using a physical connection layer, such as fiber channel. This provides a scalable approach to handling storage for servers.
T
takeover
See fallover.
takeover priority
Value assigned to each configured cluster resource on a per-node basis. In the event of a takeover, the active node with the highest priority will acquire the resource. Resources may also be grouped, and a priority assigned to the group.
Two-Node Cluster Configuration Assistant
A wizard-like application that lets you configure an HACMP for Oracle two-node cluster definition by providing the minimum information required by HACMP.
The application is designed for users with little knowledge of HACMP who want to quickly set up a basic HACMP configuration.V
VIP
Virtual IP address that the Oracle middle tier application server uses to access the cluster. This VIP is assigned to the active Infrastructure Tier node.
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