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Oracle Exadata Database Machine X3 Administration

Question No: 31

Which two are true about Exadata storage server alerts?

  1. Metric alerts are never stateful.

  2. Metrics have no thresholds set on them by default.

  3. SNMP alert notifications can be sent to only one destination.

  4. Metric threshold; if set, will persist across storage server reboots.

  5. SMTP alert notifications must be sent to both ASR manager and Enterprise Manager Agents

Answer: D,E Explanation: Incorrect:

Not A: there are both stateful and stateless alerts. Not B: Metrics have defaults.

Not C: An SNMP alert can have multiple destinations.

Question No: 32

You are planning the physical installation of two full rack Database Machines and two full- rack expansion racks. The four racks will be combined into one multi rack system.

Which are the two guidelines for installing this configuration in your data Center?

  1. All Database Machines must be placed side by side with no space between them.

  2. All Expansion Racks must be placed side by side with no space between them.

  3. All racks must be placed in such a way that the exhaust air of one rack does not enter the air inlet of another

  4. All racks must be placed side by side with no space between them.

  5. All racks must be isolated from each other with at least one meter between them.

  6. Racks may be placed as required in the machine room.

  7. Expansion Racks must be placed side by side at least one meter apart.

Answer: A,C

Explanation: A: Group related racks together – for example, racks that run a common database or are part of a common cluster

C: Inadequate cold air flow could result in higher air inlet temperatures in the servers due to exhaust air recirculation

Question No: 33

You have used setupem.sh to deploy a plug in for Grid Control.

In which two ways do all the targets supported by the plug-in get configured?

  1. The targets must be configured by an Enterprise Manager administrator manually using Grid Control.

  2. Setupem.sh is used again to configure the targets.

  3. The targets must be configured by an O/S administrator manually.

  4. The targets must be configured by a database administrator manually.

  5. There may be more than one target for each plug-in.

Answer: A,E

Question No: 34

Which four statements are true about Exadata Smart Flash Cache?

  1. Smart Scan will always be done for I/Os to flash based griddisks.

  2. Flash based ASM diskgroups may share space with the Flash Cache on the flashdisks.

  3. Single block reads can benefit from Smart Flash Cache.

  4. Smart Scan will never be done for I/Os to flash based griddisks.

  5. Multiblock reads can benefit from Smart Flash Cache.

  6. Smart Flash Logs reduce the size of Smart Flash Cache.

Answer: B,C,E,F

Explanation: B: * Grid disks (the logical disks

that reside on physical cell disks) are created on these flash-based cell disks and the grid disks are assigned to an Automatic Storage Management (ASM) diskgroup. The best practice would be to reserve the same amount of flash on each Exadata cell for flash disks and have the ASM

diskgroup spread evenly across the Exadata cells in the configuration just as you would do for

regular Exadata grid disks. This will evenly distribute the flash I/O load across the Exadata cells

and flash.

Note:

  • The Exadata

    Storage Server comes with a substantial amount of flash storage. A small amount is allocated for

    database logging and the remainder will be used for caching user data

    Question No: 35

    Which two communication methods are used by which components in the Enterprise manager Architecture for the Database Machine?

    1. SNMP traps for alerts are sent by the storage server ILOM to the storage server MS process

    2. SNMP traps for alerts are sent by the storage server MS process to the storage server ILOM

    3. SNMP traps for alerts are sent by the storage server ILOM to the Enterprise Manager agent.

    4. SNMP traps for alerts are sent by the storage server MS process to the enterprise Manager agent

    5. SNMP traps for alerts are sent by the storage server ILOM to the storage server RS process.

    Answer: A,D

    Explanation: There are two types of server alerts that come from Oracle Exadata Storage Server:

  • (A) For Integrated Lights Out Manager (ILOM)-monitored hardware components, ILOM reports a failure or threshold exceeded condition as an SNMP trap, which is received by MS.

    MS processes the trap, creates an alert for the storage server, and delivers the alert via SNMP

    to Oracle Enterprise Manager 12c.

  • (D) For MS-monitored hardware and software components, MS processes a failure or threshold

    exceeded condition for these components, creates an alert, and delivers the alert via SNMP to

    Oracle Enterprise Manager Cloud Control 12c.

    Reference: Managing Oracle Exadata with Oracle Enterprise Manager 12c, Oracle White Paper

    Question No: 36

    Your Database Machine has a large database with some very large tables supporting OLTP workloads.

    High volume Insert applications and high volume update workloads access the same tables.

    You decide to compress these tables without causing unacceptable performance overheads to the OLTP application.

    Which three are true regarding this requirement?

    1. Using #39;compress for oltp#39; will compress the data less than if using Hybrid Columnar Compression when specified with compress for query low.

    2. The compression is performed on the storage servers when using compress for oltp in an Exadata environment.

    3. The compression method compress for archive high is the worst fit for this requirement.

    4. Using #39;compress for oltp#39; will compress the data more than if using Hybrid Columnar Compression when specified with compress for archive low.

    5. The compression is performed on the database servers when using #39;compress for oltp#39; in an Exadata environment.

    Answer: A,C,E Explanation: Note:

    (E not B):

  • Types of compression

Basic compression OLTP compression Warehouse compression

Online archival compressio

*

/ OLTP compression allows compression during DML operations.

/ Basic compression works at the data block level.

  • When you enable table compression by specifying COMPRESS FOR OLTP, you enable OLTP table compression. Oracle Database compresses data during all DML operations on the table. This form of compression is recommended for OLTP environments.

  • When you specify COMPRESS FOR QUERY or COMPRESS FOR ARCHIVE, you enable hybrid columnar compression. With hybrid columnar compression, data can be compressed during bulk load operations. During the load process, data is transformed into a column-oriented format and then compressed. Oracle Database uses a compression algorithm appropriate for the level you specify. In general, the higher the level, the greater

    the compression ratio.

    Hybrid columnar compression can result in higher compression ratios, at a greater CPU cost. Therefore, this form of compression is recommended for data that is not frequently updated.

    Question No: 37

    Which three are among the software components that constitute the QoS Management framework?

    1. Cluster Health Monitor (CHM)

    2. Cluster Verification Utility (CLUVFY)

    3. O/S Resource Manager

    4. Grid Infrastructure for a standalone server

    5. Grid Infrastructure for a cluster

    6. OC4J cluster resource

    Answer: A,E,F

    Explanation: A: In conjunction with Cluster Health Monitor, QoS Management’s Memory Guard detects nodes that are at risk of failure due to

    memory over-commitment. It responds by automatically preventing new connections thus preserving existing workloads and restores connectivity once the sufficient memory is again available.

    F: The ora.oc4j is for the QoS (Quality of Service Management), which is only available on Exadata.

    Incorrect:

    Not B: The Cluster Verification Utility (CVU) performs system checks in preparation for installation, patch updates, or other system changes. Using CVU ensures that you have completed the required system configuration and preinstallation steps so that your Oracle grid infrastructure or Oracle Real Application Clusters (Oracle RAC) installation, update, or patch operation completes successfully.

    Question No: 38

    You have two very large databases supporting OLTP workloads which run on multiple small-blade style servers in a cluster and which require optimal latency for I/O.

    You plan to migrate them to a Database Machine once a capacity planning exercise is finished.

    The database backup strategy requires that backups are written directly to media.

    High availability requirements state that you must be able to survive node failures at any time.

    Which three Database Machine components or features would you recommend to support these requirements?

    1. Use of write back flash cache

    2. Use of smart flash logs

    3. High capacity disks in the Database Machine

    4. High performance disks in the Database Machine

    5. A high capacity expansion full rack

    6. A high performance expansion full rack

    Answer: A,B,C

    Question No: 39

    Which two are true about the use of the Integrated Lights Out Manager (ILOM) on the Database Machine?

    1. ILOM can be used to power-on the Cisco switch.

    2. ILOM can be used to power on the InfiniBand switches.

    3. ILOM can be used to power-on the database servers.

    4. ILOM generates hardware alerts for the power distribution units.

    5. ILOM provides a remote console for the storage servers.

    Answer: C,E Explanation:

  • The Oracle ILOM Remote Console is supported on all Oracle Sun x86 processor-based servers. It is also supported on some SPARC processor-based servers. The Oracle ILOM Remote Console is a Java application that you can launch from the Oracle ILOM web interface

  • Remote Management: Integrated Lights Out Manager (ILOM) Ethernet port

Question No: 40

Identify two valid reasons for creating multiple griddisks on a Single celldisk.

  1. To segregate storage into multiple pools with different performance characteristics

  2. To facilitate normal or high redundancy ASM diskgroups

  3. To enable disk mirroring for the system area

  4. To segregate storage into multiple pools that can be assigned to different databases

  5. To segregate storage into multiple pools that can be assigned to different resource consumer groups in the same database.

Answer: A,D

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