What is a cluster database in Oracle?

Oracle RAC enables you to cluster Oracle databases. Oracle RAC uses Oracle Clusterware for the infrastructure to bind multiple servers so they operate as a single system. Oracle Clusterware is a portable cluster management solution that is integrated with Oracle Database.

Besides, what is a SQL database cluster?

Microsoft Windows Failover Clustering is a high-availability option designed to increase the uptime of SQL Server instances. A cluster includes two or more physical servers, called nodes; identical configuration is recommended.

What is a node in a cluster?

A server cluster is a group of independent servers running Windows Server 2003, Enterprise Edition, or Windows Server 2003, Datacenter Edition, and working together as a single system to provide high availability of services for clients.

What is a Oracle Cluster?

Oracle Clusterware is the cross-platform cluster software required to run the Real Application Clusters (RAC) option for Oracle Database. It provides the basic clustering services at the operating-system level that enable Oracle Database software to run in clustering mode.

What are the components of RAC?

At a very high level, RAC architecture consists of these components:

  • Physical nodes or hosts.
  • Physical interconnects and interconnect protocols.
  • Oracle Clusterware.
  • Oracle instances and cache fusion.
  • Shared disk system.
  • Clustered file system, raw devices, network file system, Automatic Storage Management.
  • Network services.
  • What is meant by Oracle RAC?

    In database computing, Oracle Real Application Clusters (RAC) — an option for the Oracle Database software produced by Oracle Corporation and introduced in 2001 with Oracle9i — provides software for clustering and high availability in Oracle database environments.

    What is a virtual cluster?

    Virtual clusters are built with VMs installed at distributed servers from one or more physical clusters. The VMs in a virtual cluster are logically connected by a virtual network across several physical networks. Each virtual cluster is formed with physical machines or a VM hosted by multiple physical clusters.

    What is high availability in Oracle?

    Oracle Data Guard is a high availability and disaster-recovery solution that provides very fast automatic failover (referred to as fast-start failover) in the case of database failures, node failures, corruption, and media failures.

    What is CRS in Oracle RAC?

    Cluster Ready Services (CRS) It provides the cluster software, sometimes called the Oracle OSD Clusterware. The OUI installs CRS on each node on which the OUI detects that vendor clusterware is running. In addition, the CRS home is distinct from the RAC-enabled Oracle Home.

    What is the use of Data Guard in Oracle?

    Oracle Data Guard ensures high availability, data protection, and disaster recovery for enterprise data. Data Guard provides a comprehensive set of services that create, maintain, manage, and monitor one or more standby databases to enable production Oracle databases to survive disasters and data corruptions.

    What is the ASM in Oracle?

    Automatic Storage Management (ASM) is an integrated, high-performance database file system and disk manager. ASM eliminates the need for you to directly manage potentially thousands of Oracle database files. ASM groups the disks in your storage system into one or more disk groups.

    What is Data Guard in Oracle 11g?

    Data Guard provides a comprehensive set of services that create, maintain, manage, and monitor one or more standby databases to enable production Oracle databases to survive disasters and data corruptions. Data Guard maintains these standby databases as copies of the production database.

    What is a Clusterware?

    Oracle RAC uses Oracle Clusterware for the infrastructure to bind multiple servers so that they operate as a single system. Oracle Clusterware is a portable cluster management solution that is integrated with the Oracle database. The Oracle Clusterware is also a required component for using Oracle RAC.

    What is a cluster in Oracle RAC?

    Oracle RAC enables you to cluster Oracle databases. Oracle RAC uses Oracle Clusterware for the infrastructure to bind multiple servers so they operate as a single system. Oracle Clusterware is a portable cluster management solution that is integrated with Oracle Database.

    What is the Golden Gate in Oracle?

    Oracle GoldenGate 12c enables the continuous, real-time capture, routing, transformation, and delivery of transactional data across heterogeneous environments. As new or updated data is committed at the source system, it is continuously captured and applied to one or more target systems with low latency.

    What is the Oracle Exadata?

    The Exadata Database Machine is a “cloud in a box” composed of database servers, Oracle Exadata Storage Servers, an InfiniBand fabric for storage networking and all the other components required to host an Oracle Database. The Exadata Storage Server is an integral component of the Exadata Database Machine.

    What is RAC One Node?

    Traditionally, Oracle RAC is used in a multi-node architecture, with many separate instances of RAC residing on separate servers. RAC One Node claims to be a multiple instances of RAC running on a single node in a cluster, and has a fast “instance relocation” feature in cases of catastrophic server failure.

    What is the Oracle instance?

    When a database is started on a database server (regardless of the type of computer), Oracle allocates a memory area called the System Global Area (SGA) and starts one or more Oracle processes. This combination of the SGA and the Oracle processes is called an Oracle instance.

    What is Oracle Active Data Guard?

    Data Guard provides the management, monitoring, and automation software to create and maintain one or more synchronized copies of a production database to protect Oracle data from failures, disasters, human error, and data corruptions while providing high availability for mission critical applications.

    What is the Oracle grid infrastructure?

    The Oracle Grid Infrastructure for a standalone server is the Oracle software that provides system support for an Oracle database including volume management, file system, and automatic restart capabilities. Oracle Grid Infrastructure for a standalone server is the software that includes Oracle Restart and Oracle ASM.

    What is Grid architecture in Oracle?

    And Oracle delivers this grid computing functionality in the context of holistic enterprise architecture, providing a robust security infrastructure, centralized management, intuitive, powerful development tools, and universal access. Oracle 10g includes: The “g” in Oracle 10g stands for grid.

    What is grid control?

    Grid Control is a system management software that delivers centralized monitoring, administration, and life cycle management functionality for the complete Oracle IT infrastructure, including systems running Oracle and non-Oracle technologies.

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