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Latest and Most Accurate Oracle 1z0-068 Dumps Exam Q&As:
You are developing a user callout procedure to send an email to the helpdesk whenever a RAC database instance fails to restart after node failure.
Examine these tasks (see exhibit):
Identify the minimum steps required, in the correct sequence, to implement this.
A. 1,3, 7
B. 1, 4, 6
C. 2, 5, 8
D. 2, 4, 7, 8
E. 2, 4, 7
F. 1, 4, 7, 8
FAN callouts are server-side executables that Oracle Restart executes immediately when high availability events occur.
You can use FAN callouts to automate thefollowing activities when events occur, such as:
To use FAN callouts, place an executable in the directory grid_home/racg/usrco on both the primary and the standby database servers. If you are using scripts, then set the shell as the first line of the executable. The following is an example file for the grid_home/racg/usrco/callout.sh callout:
FAN_LOGFILE= [your path name]/admin/log/`hostname`_uptime.log
echo $* “reported=”`date` >> $FAN_LOGFILE &
Note: Oracle has proved options where a script or utility or application (called server side callout), if placedin $GRID_HOME/racg/usrco directory, will be executed automatically.
References: Expert Oracle RAC Performance Diagnostics and Tuning (2014), page 506
Which three options have a RAC-specific tuning component?
A. contention on index leaf blocks
B. sequence definitions
C. the size of the online redo log buffers
D. contention for online redo log files
E. contention for archived redo log files
F. the load on the Cluster Interconnect
A: Contention for data and index blocks in a single instance database will probably magnify in a RAC environment.
C: A typical cause of high latencies is when the LMS process must flush uncommitted changes to the redo log prior to sending the block to the requesting instance. If the application design is such that uncommitted blocks are often in demand across instances in the cluster then these redo log flushes might become common.
F: Examining the interconnect
When Global Cache waits are high, we should first determine if the latency is primarily the result of interconnect network waits.
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Examine this command to create a volume in the DATA disk group:
SQL>ALTER DISKGROUP DATA ADD VOLUME vo11 SIZE 10g HIGH
The DATA disk group has 50GB free space.
Which two are prerequisites for successful execution of this command?
A. COMAPTIBLE.ASM and COMPATIBLE.ADVM must be set to 11.2 or higher for the DATA disk group.
B. The DATA disk group must not be created with external redundancy.
C. The DATA disk group must not contain any other volume.
D. The DATA disk group must have at least three failure groups.
E. The DATA disk group must have an AU size of 1MB.
The compatibility parameters COMPATIBLE.ASM and COMPATIBLE.ADVM must be set to 11.2 or higher for the disk group. A high redundancy disk group must contain at least three failure groups.
Which two statements are true about v$asm – views in clustered environment?
A. They exist both in ASM and RDBMS instances, and display the same output.
B. Their names can be seen in dict when connected to an ASM instance.
C. Their names can be seen in v$fixed_table when connected to an instance of any type that is started.
D. They exist in both in ASM and RDBSM instances, but they can display different outputs depending on the instance type.
E. gv$asm_attribute can be used to display the ASM_POWER_LIMIT attribute of all ASM instances in the cluster.
You can use the views to obtain information about Oracle Automatic Storage Management Cluster File System (OracleACFS). These views are accessible from the Oracle ASM instance.
Which two statements are true about ASM default templates?
A. Default data file templates are only created by ASM when a normal redundancy disk group is created.
B. Default template settings for redundancy depends on the disk group redundancy.
C. Default templates for a disk group can be modified.
D. Default template setting for striping depends on disk group redundancy.
E. Templates may be shared across disk groups.
Default template settings depend on the diskgroup type. The default template for data files for a normal redundancy.
Which three statements are true regarding Flex ASM on a four-node cluster consisting of three-hub nodes and a leaf node?
A. An ASM instance and database instances can coexist on the same hub node.
B. A database instance on a hub node canbe a client of an ASM instance running on any leaf node.
C. A database instance on a hub node can be a client of an ASM instance running on any hub node.
D. A database instance on a leaf node can be a client of an ASM instance running on any hub node.
E. A database instance on a hub node uses an ASM instance as an I/O server when requesting I/O to diskgroups.
F. ASM Cluster File System (ASFS) can only be deployed on hub nodes.
Architecturally Oracle Flex Cluster comprises of a Hub and Leafarchitecture where in only the Hub nodes will only have direct access to Oracle Cluster Registry (OCR) and Voting Disk (VD). However application can access the database via Leaf nodes without ASM instance NOT running on Leaf nodes. The connection to the database is through Hub making it transparent for the application.
Hub Nodes are connected among them via private network and have direct access to the shared storage just like previous versions. These nodes are the ones that access the Oracle Cluster Registry (OCR) and Voting Disk (VD) directly.
Leaf Nodes are lighter and are not connected among them, neither accesses the shared storage like the Hub Nodes. Each Leaf Node communicates with the Hub Node that is attached to, and it is connected to the cluster via the Hub Node that is linked to.