Oracle Exadata X3 and X4資格は、大量のメモリーと低コストのディスクを組み合わせて、最高性能を最低コストで提供します。Oracle Exadata X3 and X4認定資格を認めて、共同、標準的な作業方法は国際認証のもう一つ価値です。Oracle Exadataを使用すると、統合によるITコストの削減、最大10倍までのデータの保存、あらゆるアプリケーションのパフォーマンスの向上、システム統合の試行錯誤をなくすことによる市場投入時間の短縮、およびリアルタイムのビジネス決定の向上が可能になります。
Oracle Exadata X3 and X4資格
1Z0-027試験情報：
試験コード：1Z0-027
試験名称：Oracle Exadata X3 and X4 Administration
対応資格：Oracle Certified Expert, Oracle Exadata X3 and X4 Administrator
試験製品バージョン：Exadata
受験時間：150分
問題数：90
合格率：60％
試験形式：多肢選択
Oracle Exadata Database Machine X3 and X4 Administration 1Z0-027認定試験の範囲は、Exadata Database Machineの機能と設定、Exadataストレージ?サーバー、Database Machineへの移行、初期設定後のDatabase Machineのメンテナンス、監視および最適化です。
1Z0-027認定試験は、実証された専門知識による優位を提供することにより市場において受験者を差別化します。
Oracle Exadata X3 and X4 Administration 1Z0-027試験資料：
TestpassportのOracle Exadata X3 and X4 Administration 1Z0-027問題集は実際の試験問題に対して役に立ちます。弊社の1Z0-027問題集は単項の選択問題、多肢選択問題、ドラッグ＆ドロップ、実験問題及び穴埋め問題などの試験フォームを含んでいます。
弊社の1Z0-027過去の問題は独学可能です。
弊社のOracle Exadata X3 and X4 Administration 1Z0-027練習問題は問題と答えを暗記しただけで、100％試験合格率です。弊社のOracle Exadata X3 and X4 Administration 1Z0-027試験対策を使って、Exadataのデータベースマシンの概要、Exadata Database Machineをアーキテクチャ、Exadata Database Machineをの主な機能、Exadata Database Machineを初期構成、Exadataのストレージサーバーを構成、I/ Oリソース管理、データベース?パフォーマンスを最適化するための推奨事項スマートスキャンを使用、統合オプションと推奨事項、Exadata Database Machineをへのデータベースの移行などの試験内容を習得でき、経験や知識は初心者としても独学では取得できます。
下記は1Z0-027問題、答えと解説です。1Z0-027無料サンプルを使って、お客様がもっと自信があります。
1.To troubleshoot a possible hardware problem, you consider moving all disk drives from one Exadata
storage server to a replacement chassis. You must contain storage availability while performing task. The
Exadata storage server is an X3-8 Database Machine and storage grid is not partitioned.
Which two factors would prevent you from moving the disks from one Exadata storage server to another
one?
A. The existence of an external redundancy ASM diskgroup
B. The existence of a normal redundancy ASM diskgroup
C. The existence of an ASM diskgroup with the repair_time attribute set to 0.
D. The existence of an ASM diskgroup with its compatible.asm attribute set to 10.2.0.0.0
E. Offline or inactive celldisks in another Exadata server
Answer: A,D
Explanation:
A:If you want Oracle ASM to mirror files, specify the redundancy level as NORMAL REDUNDANCY
(2-way mirroring by default for most file types) or HIGH REDUNDANCY (3-way mirroring for all files).You
specify EXTERNAL REDUNDANCY if you do not want mirroring by Oracle ASM.For example, you might
choose EXTERNAL REDUNDANCY if you want to use storage array protection features.
D:Restoring the redundancy of an Oracle ASM disk group after a transient disk path failure can be time
consuming.This is especially true if the recovery process requires rebuilding an entire Oracle ASM failure
group.Oracle ASM fast mirror resync significantly reduces the time to resynchronize a failed disk in such
situations.When you replace the failed disk, Oracle ASM can quickly resynchronize the Oracle ASM disk
extents.
To use this feature, the disk group compatibility attributes must be set to 11.1 or higher.
Incorrect: Not C:You can set the DISK_REPAIR_TIME disk group attribute to delay the drop operation by
specifying a time interval to repair the disk and bring it back online.
Note: *The redundancy levels are:
/External redundancy
Oracle ASM does not provide mirroring redundancy and relies on the storage system to provide RAID
functionality.Any write error cause a forced dismount of the disk group.All disks must be located to
successfully mount the disk group.
/Normal redundancy
Oracle ASM provides two-way mirroring by default, which means that all files are mirrored so that there
are two copies of every extent.A loss of one Oracle ASM disk is tolerated.You can optionally choose
three-way or unprotected mirroring.
/High redundancy
Oracle ASM provides triple mirroring by default.A loss of two Oracle ASM disks in different failure groups
is tolerated.
Reference:Administering Oracle ASM Disk Groups
2.Which two are regarding the case of storage indexes?
A. To increase the chance of using the a storage index, you can make table indexes invisible.
B. To maximize the benefit of storage Indexes, load your data stored on the filtered columns.
C. The cell physical 10 bytes saved by storage index statistic returns multiple rows, one for each storage
server.
D. Storage indexes are retained after a cell is rebooted.
E. Avoid the use of bind variables because Storage Indexes do not work with bind variables.
Answer: B,E
Explanation:
B:* To use storage indexes, Oracle Exadata queries must use smart scans, so not all types of applications
can benefit from storage indexes.*With Exadata storage, database operations are handled much more
efficiently.Queries that perform table scans can be processed within Exadata storage with only the
required subset of data returned to the database server.Row filtering, column filtering and some join
processing (among other functions) are performed within the Exadata storage cells.When this takes place
only the relevant and required data is returned to the database server.
Incorrect:
Not D:Storage indexes reside in the memory of the storage servers.If a storage cell is shutdown or
rebooted the storage index will be lost from memory and will be recreated on subsequent accesses to the
data after the cell has been brought back online.
3.Identity the resource bottleneck for which QoS Management can generate recommendation?
A. CPU resource bottlenecks
B. Global Cache resource bottlenecks
C. I/O resource bottlenecks
D. Network resource bottlenecks
Answer: B
Explanation:
Note: *Oracle Exadata QoS Management provides the following benefits:
Reduces the time and expertise requirements for system administrators who manage Oracle Real
Application Clusters (Oracle RAC) resources
Helps reduce the number of performance outages
Reduces the time needed to resolve problems that limit or decrease the performance of your
applications
Provides stability to the system as the workloads change
Makes the addition or removal of servers transparent to applications
Reduces the impact on the system caused by server failures
Helps ensure that service-level agreements (SLAs) are met
Enables more effective sharing of hardware resources
Protects existing workloads from over committed memory-induced server failures
Exadata Storage Virtualization
Exadata provides a rich set of sophisticated and powerful storage management virtualization capabilities
that leverage the strengths of the Oracle Database, the Exadata software, and Exadata hardware.
*When QoS Management is enabled, individual Exadata nodes are protected from memory related
failures.The Memory Guard features tracks real-time memory use and should it detect a node has
over-committed memory, will prevent new database requests from being sent until the current load is
relieved
