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NEW QUESTION: 1
A. Option C
B. Option A
C. Option E
D. Option B
E. Option D
Answer: E
Explanation:
Explanation
* Oracle Database provides a mechanism to make table structure modifications without significantly affecting the availability of the table. The mechanism is called online table redefinition. Redefining tables online provides a substantial increase in availability compared to traditional methods of redefining tables.
* To redefine a table online:
Choose the redefinition method: by key or by rowid
* By key-Select a primary key or pseudo-primary key to use for the redefinition. Pseudo-primary keys are unique keys with all component columns having NOT NULL constraints. For this method, the versions of the tables before and after redefinition should have the same primary key columns. This is the preferred and default method of redefinition.
* By rowid-Use this method if no key is available. In this method, a hidden column named M_ROW$$ is added to the post-redefined version of the table. It is recommended that this column be dropped or marked as unused after the redefinition is complete. If COMPATIBLE is set to 10.2.0 or higher, the final phase of redefinition automatically sets this column unused. You can then use the ALTER TABLE ... DROP UNUSED COLUMNS statement to drop it.
You cannot use this method on index-organized tables.
Note:
* When you rebuild an index, you use an existing index as the data source. Creating an index in this manner enables you to change storage characteristics or move to a new tablespace. Rebuilding an index based on an existing data source removes intra-block fragmentation. Compared to dropping the index and using the CREATE INDEX statement, re-creating an existing index offers better performance.
Incorrect:
Not E: Edition-based redefinition enables you to upgrade the database component of an application while it is in use, thereby minimizing or eliminating down time.
NEW QUESTION: 2
Which of the following does the PA1 key denote in TSO/E?
A. Attention
B. Cancel
C. Exit
D. Terminate
Answer: A
NEW QUESTION: 3
A. Option B
B. Option A
Answer: A
Explanation:
https://docs.microsoft.com/en-us/azure/virtual-machines/windows/sql/virtual-machines-windows-sql-performanc
NEW QUESTION: 4
AWS에서 웹 사이트를 운영하는 회사는 높은 수준의 확장성, 가용성 및 성능이 필요합니다. 회사는 Amazon EC2에서 Ruby on Rails 응용 프로그램을 실행 중입니다. 16TB의 Amazon EBS 스토리지를 사용하는 Amazon EC2의 MySQL 5.6에서 데이터 계층을 제공합니다. Amazon CloudFront는 애플리케이션 컨텐트를 캐시하는데 사용됩니다. 운영 팀은 MySQL 데이터베이스에 할당된 EBS 볼륨의 예기치 않은 증가를 계속 보고합니다. Solutions Architect는 확장 성이 높고 가용성이 높으며 성능이 우수한 솔루션을 설계해야 합니다.
어느 솔루션이 규모면에서 가장 경제적인 솔루션입니까?
A. Amazon ECS를 사용하여 애플리케이션 용 Docker 기반 컨테이너 솔루션을 설계하고 구현합니다.
Amazon Aurora MySQL Multi-AZ 클러스터로 마이그레이션하십시오. 필요에 따라 Aurora MySQL 스토리지 활용 및 AWS Lambda 기능에 대한 스토리지 검사를 구현하여 Aurora MySQL 스토리지를 확장하십시오.
Multi-AZ 아키텍처가 구현되었는지 확인하십시오.
B. EC2 인스턴스가 올바른 크기이고 Elastic Load Balancing 부하 분산 장치 뒤에 있어야 합니다.
EC2 인스턴스로 자동 스케일링을 구현하십시오. 고정 된 용량을 위해 예약 된 인스턴스를 구입하고 Auto Scaling 인스턴스가 필요할 때 실행되는지 확인하십시오. Amazon Aurora MySQL Multi-AZ 클러스터로 마이그레이션하십시오. Multi-AZ 아키텍처가 구현되었는지 확인하십시오.
C. EC2 인스턴스가 올바른 크기이고 Elastic Load Balancer 뒤에 있는지 확인하십시오. EC2 인스턴스로 자동 스케일링을 구현하십시오. 예약 인스턴스가 고정 용량으로 구매되고 자동 확장 인스턴스가 필요할 때 실행되는지 확인하십시오. Amazon Aurora MySQL Multi-AZ 클러스터로 마이그레이션 하십시오. 필요한 경우 Aurora MySQL 스토리지 활용 및 AWS Lambda 기능에 대한 스토리지 검사를 구현하여 필요에 따라 Aurora MySQL 스토리지를 확장하십시오. 다중 AZ 아키텍처가 구현되었는지 확인하십시오.
D. 현재 구성의 모든 EC2 인스턴스에 대해 다중 AZ 및 자동 확장을 구현합니다. 모든 EC2 인스턴스가 예약 인스턴스로 구입되었는지 확인하십시오. 데이터 계층에 새로운 Amazon EBS 볼륨을 구현하십시오.
Answer: B