RAC - Commonly used Terms and Utilities

. InShort Meaning Details . RAC Real Application Clusters Is Oracle Implementation of Clustered Database Instances. . CRS Cluster Ready Services Oracle's own cluster ware tightly coupled with Oracle Real Application Clusters . OCFS Oracle Cluster File System Oracle File system Implementation For Linux. . PCP Parallel Concurrent Processing PCP allows concurrent processing activities to be distributed across multiple nodes in an RAC environment, maximizing throughput and providing resilience to node failure. . OCR Oracle Cluster Registry The OCR contains cluster and database configuration information for RAC and Cluster Ready Services . ASM Automatic Storage Management Simplifies database administration by enabling you to create disk groups and manage them instead of individual datafiles. . ASMCMD ASM Command Utility ASM Command Utility to monitor ASM . SSH Secure Shell SSH is a set of standards and an associated network protocol that allows establishing a secure channel between a local and a remote computer. . RSH Remote Shell . DSA Digital Signature Algorithm The Digital Signature Algorithm . SCSI Small Computer System Interface Standard interface and command set for transferring data between devices commonly used for interfaces for hard disks, and USB and FireWire connections for external devices. . NAS Network-attached storage Is a dedicated data storage technology that can be connected directly to a computer network to provide centralized data access and storage to heterogeneous network clients. . NFS Network Filesystem Its a protocol allows a user on a client computer to access files over a network as easily as if attached to its local disks. . OSCP Oracle Storage Compatibility Program An Oracle Program To assist third-parties with their Oracle compatibility with respect to storage devices. . DTP Distributed Transaction Processing DTP model is the synchronization of any commits and rollbacks that are required to complete a distributed transaction request. . VIP Virtual IP Address Its an IP address that is not connected to a specific computer or network interface card . TCP/IP Transmission Control Protocol TCP . DNS Domain Name Server The domain name system is responsible for translating it translates domain names . MAC Media Access Control Media Access Control address

. JDBC Java Database Connectivity A Java API that allows independent connectivity between the Java programming language and a wide range of databases. . LB Load Balancing Is a technique to balance the load between configured servers. . FAN Fast Application Notification Enables end-to-end, lights-out recovery of applications and load balancing when a cluster configuration changes. . FCF Fast Connection Failover Fast Connection Failover provides the ability to failover connections in the connection cache as quickly and efficiently as the database itself. . TAF Transparent Application Failover Using transparent application recovery . OCI Oracle Call Interface OCI allows you to develop applications that take advantage of the capabilities of SQL from within the application. . ODP Oracle Data Provider ODP.NET features optimized data access to the Oracle database from a .NET environment. . ONS Oracle Names Server Oracle Names makes network address and database link information available to all nodes throughout the network. . ORION Oracle I/O Numbers ORION is a test tool freely available tool which simulates Oracle I/O. . GSD Global Services Daemon The Global Services Daemon . NTP Network Time Protocol The Network Time Protocol . CVU Cluster Verification Utility CVU is used to verify all the important components that need to be verified at different stages in a RAC environment. . VSD Virtual Shared Disk A Virtual Shared Disk . LPARs Logical Partitions Logical Partition, commonly called an LPAR, is a virtualized computing environment abstracted from all physical devices. . DBCA Oracle Database Configuration Assistant An Oracle utility that facilitates the creation and configuration of a database. . ORACM Oracle Cluster Manager Allows to add new nodes to an existing cluster without having to stop/start the whole cluster. . RDA Remote Diagnostic Agent An Oracle Diagnostic Tool used in troubleshooting. . GFS Global Filesystem GFS allows a cluster of Linux servers to share data in a common pool of storage. . NIC Network Interface Controller Its a piece of computer hardware designed to allow computers to communicate over a computer network. . LVM Logical Volume Manager

. GPFS General Parallel File System GPFS is IBM’s high-performance parallel, scalable file system for IBM UNIX clusters. . HA High Availability . MAA Maximum Availability Architecture . RACDDT RAC Data Collection Tool Is a data collection tool designed and configured specifically for gathering diagnostic data related to Oracle's Real Application Cluster . OSW OSWatcher Is an operating system diagnostic utility tool that gathers archival performance data using various native Unix utilities, such as vmstat, iostat and top. . OLS Oracle Label Security Oracle Label Security is developed based on virtual private database . RSM Remote Shared Memory Is a feature that bypasses the UDP/IP communication in Solaris. . UDP/IP User Datagram Protocol Can send short messages sometimes known as datagrams to one another. . TNS Transparent Network Substrate Allows peer-to-peer connectivity where no machine-level connectivity can occur. . EMCA Enterprise Manager Configuration Assistant An Oracle tool to set up the Enterprise Manager. . OPS Oracle Parallel Server The OPS option allows multiple instances on different computer systems . SRVCTL Server Control A utility to assist in administration and maintenance of RAC databases. . CRSCTL CRS Control A utility to assist in administration and monitoring of CRS. . CRS Commands . CRS_STAT List the status of resources . CRS_GETPERM Checks the permissions that are associated with each resource . CRS_PROFILE Creates, validates, deletes, and updates an Oracle Clusterware profile . CRS_REGISTER This command registers configuration information for an application with the OCR . CRS_RELOACTE Used to relocate an application profile from one node to another. . CRS_SETPERM Sets and modifies permissions associated with a resource