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Which three statements are true about services when used with transparent application failover (TAF) for an administrator-managed RAC database?
A: SESSION failover. When the connection to an instance is lost, SESSION failover results only in the establishment of a new connection to another Oracle RAC node; any work in progress is lost. SESSION failover is ideal for online transaction processing (OLTP) systems, where transactions are small.
C: SELECT failover. With SELECT failover, Oracle Net keeps track of all SELECT statements issued during the transaction, tracking how many rows have been fetched back to the client for each cursor associated with a SELECT statement. If the connection to the instance is lost, Oracle Net establishes a connection to another Oracle RAC node and re-executes the SELECT statements, repositioning the cursors so the client can continue fetching rows as if nothing has happened. The SELECT failover approach is best for data warehouse systems that perform complex and time-consuming transactions.
D: Oracle's answer to application failover is a new Oracle Net mechanism dubbed Transparent Application Failover. TAF allows the DBA to configure the type and method of failover for each Oracle Net client.
Which two types of IP address details are administered using the srvctl command for Oracle Clusterware 12c? (Choose two.)
A: To convert a cluster that is not running GNS to a GNS server cluster, run the following command as root, providing a valid IP address and a domain:
# srvctl add gns -vip IP_address -domain domain
D: Example:
Which three statements are true about ASM Cloud File System (ACFS) auditing?
C: The acfsutil audit init command must be run by the system administrator before enabling auditing for any of the audit sources on a file system.
D: Only an audit manager can run the acfsutil audit purge command.
E: acfsutil audit read marks the audit trail to indicate to the audit manager that the log archive file for the current node has been reviewed, backed up as necessary, and is safe to purge.
You support a three-instance, policy-managed, multitenant RAC database CDB1 with two PDBs PDB_1 and PDB_2.
It runs on an eight-node cluster and a serverpool prod_pool has three servers.
Examine these commands executed on HOST01:
$ srvctl add service --db CDB1 --pdb PDB_1 --service HR --serverpool prod_pool
$ srvctl start service --db CDB1 --service HR
$ srvctl stop service --db CDB1 --service HR
Which two statements are true?
Which two statements are true about initialization parameters for Clustered ASM instances?
C: The default value of the ASM_DISKGROUPS parameter is a NULL string. If the parameter value is NULL or is not specified, then ASM does not mount any disk groups.
E: The ASM_POWER_LIMIT initialization parameter specifies the default power for disk rebalancing in a disk group. The range of values is 0 to 1024.
