Managing CRS/ Commands

CRS DAEMON FUNCTIONALITY

CRSD: Performs high availability recovery and management operations such as maintaining the OCR and managing application resources.
- Engine for HA operation
- Manages ‘application resources’
- Starts, stops, and fails ‘application resources’ over
- Spawns separate ‘actions’ to start/stop/check application resources
- Maintains configuration profiles in the OCR (Oracle Configuration Repository)
- Stores current known state in the OCR.
- Runs as root
- Is restarted automatically on failure

OCSSD:
- OCSSD is part of RAC and Single Instance with ASM
- Provides access to node membership
- Provides group services
- Provides basic cluster locking
- Integrates with existing vendor clusteware, when present
- Can also runs without integration to vendor clustware
- Runs as Oracle.
- Failure exit causes machine reboot.
— This is a feature to prevent data corruption in event of a split brain.

EVMD: Event manager daemon. This process also starts the racgevt process to manage FAN server callouts.
- Generates events when things happen
- Spawns a permanent child evmlogger
- Evmlogger, on demand, spawns children
- Scans callout directory and invokes callouts.
- Runs as Oracle.
- Restarted automatically on failure

RESOURCE STATUS
Status of the database, all instances and all services

srvctl status database -d ORACLE -v

Status of named instances with their current services.

srvctl status instance -d ORACLE -i RAC01, RAC02 -v

Status of a named services

srvctl status service -d ORACLE -s ERP -v

Status of all nodes supporting database applications

srvctl status node

START RESOURCES
Start the database with all enabled instances

srvctl start database -d ORACLE

Start named instances

srvctl start instance -d ORACLE -i RAC03, RAC04

Start named services. Dependent instances are started as needed

srvctl start service -d ORACLE -s CRM

Start a service at the named instance

srvctl start service -d ORACLE -s CRM -i RAC04

Start node applications

srvctl start nodeapps -n myclust-4

STOP RESOURCES
Stop the database, all instances and all services

srvctl stop database -d ORACLE

Stop named instances, first relocating all existing services

srvctl stop instance -d ORACLE -i RAC03,RAC04

Stop the service

srvctl stop service -d ORACLE -s CRM

Stop the service at the named instances

srvctl stop service -d ORACLE -s CRM -i RAC04

Stop node applications. Note that instances and services also stop

srvctl stop nodeapps -n myclust-4

ADD RESOURCES

Add a new node

srvctl add nodeapps -n myclust-1 -o $ORACLE_HOME –A 139.184.201.1/255.255.255.0/hme0

Add a new database

srvctl add database -d ORACLE -o $ORACLE_HOME

Add named instances to an existing database

srvctl add instance -d ORACLE -i RAC01 -n myclust-1
srvctl add instance -d ORACLE -i RAC02 -n myclust-2
srvctl add instance -d ORACLE -i RAC03 -n myclust-3

Add a service to an existing database with preferred instances (-r) and available instances (-a). Use basic failover to the available instances

srvctl add service -d ORACLE -s STD_BATCH -r RAC01,RAC02 -a RAC03,RAC04

Add a service to an existing database with preferred instances in list one and available instances in list two. Use preconnect at the available instances

srvctl add service -d ORACLE -s STD_BATCH -r RAC01,RAC02 -a RAC03,RAC04 -P PRECONNECT

REMOVE  RESOURCES
Remove the applications for a database.
srvctl remove database -d ORACLE
Remove the applications for named instances of an existing database.
srvctl remove instance -d ORACLE -i RAC03
srvctl remove instance -d ORACLE -i RAC04
Remove the service.
srvctl remove service -d ORACLE -s STD_BATCH
Remove the service from the instances.
srvctl remove service -d ORACLE -s STD_BATCH -i RAC03,RAC04
Remove all node applications from a node.
srvctl remove nodeapps -n myclust-4

MODIFY RESOURCES
Modify an instance to execute on another node.
srvctl modify instance -d ORACLE -n my