In the “Comandi CRS” category, the commands required for managing Oracle CRS are presented, from registering listener and database resources to managing registered resources.
Oracle Clusterware is a software that allows servers to operate together as if they were a single server.
In an Oracle cluster, each server appears as a standalone server.
However, additional processes are present that enable communication between them, so that separate servers appear as if they were a single server.
Using Oracle Clusterware, it is possible to use the same high reliability mechanisms to make your Oracle database and custom applications available.
Oracle Clusterware includes several processes that facilitate cluster operations. The Cluster Ready Services (CRS) services, Cluster Synchronization Service (CSS), Event Management (EVM), and Oracle Clusterware communicate with other layers of cluster components in other instances in the same cluster database environment.
These components are also the main communication links between Oracle databases, applications, and Oracle Clusterware high availability components.
Additionally, these background processes monitor and manage database operations.
Cluster Ready Services (CRS) is the main program for managing high availability operations in a cluster. Anything that the CRS process manages is known as a cluster resource, which can be a database, an instance, a service, a listener, a virtual IP address (VIP), an application process, and so on.
The CRS process manages cluster resources based on the resource configuration information stored in the OCR. This includes startup, shutdown, monitoring, and failover operations.
After installing Oracle RAC, the CRS process monitors the Oracle database instance, the listener, and so on and automatically restarts these components when an error occurs.
With the article “srvctl stop instance,” we provide the command to stop an Oracle instance in an RAC through CRS, which is described in the following LINK. It often happens that in the context of tuning activities, for example, adjusting the SGA (System Global Area), which is the portion of RAM Read more…
srvctl start instance With the article “srvctl start instance,” we provide the command to start an Oracle instance in an RAC through CRS. This command is executed in cases where the instance needs to be started after a previous stop, for example, to modify RAM parameters such as SGA. Alternatively, Read more…
With the article “srvctl start database,” we provide the command to start all instances of an Oracle database in an RAC through CRS. When facing server maintenance activities involving an RAC, we are required to stop all instances that make up the Oracle cluster. No worries. We’ve got you covered. Read more…
With the article “srvctl stop database,” we provide the command to stop all instances of an Oracle database in an RAC via CRS. In previous articles, we extensively discussed the scenarios that could arise when stopping RAC instances. The main reasons include: server maintenance activities, which can range from server Read more…