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Oracle provides both graphical user interface (GUI) and command-line (CLI) tools for managing Data Guard configurations. Data Guard supports both physical standby and logical standby sites. Oracle Corporation makes Data Guard available only as a bundled feature included within its "Enterprise Edition" of the Oracle RDBMS. [1]
Oracle 9i addressed this issue: RAC uses a dedicated network connection for communications internal to the cluster. Since all computers/instances in a RAC access the same database, the overall system must guarantee the coordination of data changes on different computers such that whenever a computer queries data, it receives the current version ...
Fail Fast, scripted as "FAIL_FAST", means that the attempt to cure the failure fails if the first node cannot be reached. On Fail, Try One - Next Available , scripted as "ON_FAIL_TRY_ONE_NEXT_AVAILABLE", means that the system tries one host, the most accessible or available, before giving up.
These latter two database products leverage the clustered nature of the hardware to provide database-service failover in the event of a failure. Oracle also provides Oracle Clusterware for high-availability monitoring and cluster membership, and Oracle Automatic Storage Management (ASM) for storage and disk management. [10]
Oracle Database (commonly referred to as Oracle DBMS, Oracle Autonomous Database, or simply as Oracle) is a proprietary multi-model [4] database management system produced and marketed by Oracle Corporation. It is a database commonly used for running online transaction processing (OLTP), data warehousing (DW) and mixed (OLTP & DW) database ...
Failover occurs automatically: When a link has an intermediate failure, for example in a media converter between the devices, a peer system may not perceive any connectivity problems. With static link aggregation, the peer would continue sending traffic down the link causing the connection to fail.
The listener process(es) on a server detect incoming requests from clients for connection - by default on port 1521 [5] - and manage network-traffic once clients have connected to an Oracle database. The listener uses a configuration-file - listener.ora - to help keep track of names, protocols, services and hosts.
Remote Configuration Group configuration over the network via TCP connection. Supports Most PLCs and Database Systems Support nearly every OPC compliant PLC and ODBC compliant SQL database. Redundancy Supports primary and backup failover modes. [21] SQLTags Proprietary means to "turn any SQL database into a high-performance industrial tag ...