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.
CRS START ALL With the CRS START ALL article: Complete startup of all CRS cluster resources, we provide the command to initiate the opening of all online resources registered in the CRS, including the opening of databases, by executing the command from a node of an RAC. If the first Read more…
CRS STOP ALL With the CRS STOP ALL article: Complete shutdown of all CRS cluster resources, we provide the command to shut down all online resources registered in the CRS from a node of an RAC. As indicated in multiple articles, CRS is the Oracle cluster manager. Through CRS commands, Read more…
SRVCTL RELOCATE SERVICE With the article “srvctl relocate service,” we provide the command to relocate an Oracle service registered in the cluster from one node to another in the RAC using CRS. It may happen that for some reason, such as hardware failure, maintenance activity, or updates, one of the Read more…
With the article you are about to read: srvctl start service, we provide the command to start an Oracle service registered in the cluster through CRS. Before executing the start, let’s check the status of resources with the command: crsctl status res -t The command to execute srvctl start service Read more…
With the article “srvctl stop service,” we provide the command to stop an Oracle service registered in the cluster through CRS. Before executing the stop, check the status of resources with the command: crsctl status res -t The command to execute srvctl stop service is: srvctl stop service -d <database> Read more…
In this post, we’ll discuss how to enable CRS, so welcome to the “Enable CRS” article, where we provide the command to enable CRS upon operating system reboot. To enable CRS, only one command is needed, but make sure to type it correctly. For this purpose, we suggest using the Read more…
Disable CRS With the article “Disable CRS,” we provide the command to disable CRS upon operating system reboot to disable autostart. The command is just one, but we advise executing it with caution, as with any command on server platforms, of course. Disabling CRS disables CRS on the system and Read more…
With the article CRS start, we provide the command to perform a complete start of the CRS along with all its related resources. In the event that the RAC node has undergone maintenance activities or a change in some hardware component, and the CRS has been previously shut down and Read more…
With the article CRS stop, we provide the command to perform a complete stop of the CRS. The command provided is very convenient, as it shuts down all resources present on the node where it is executed. Complete CRS shutdown is very convenient because there is no need to first Read more…
srvctl stop su Oracle With the article “srvctl stop listener,” we provide the command to stop the Oracle listener on a node of an RAC through CRS. As indicated in the article srvctl start listener, the LISTENER is the process that allows network connections to the database. Specifically, it handles the Read more…