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NEW QUESTION: 1
Refer to the exhibit.
A customer needs to provision storage to a host on Cluster 1, but there is no additional local array capacity to allocate. How could the customer facilitate assigning storage to the Cluster 1 host from an array locally connected to Cluster 2?
A. Add a virtual volume from Cluster 2 to a distributed consistency group.
B. Enable remote access for a Cluster 2 virtual volume.
C. Add a remote mirror to a Cluster 2 virtual volume.
D. Create a distributed device from a virtual volume on Cluster
Answer: B
NEW QUESTION: 2
You are configuring a Windows Server 2008R2 Hyper-V failover cluster.
You configure five iSCSI logical unit numbers (LUNs) on shared storage, and you present them to the first
server.
Each LUN appears twice in the Disk Management console.
You need to ensure that each LUN appears only once in the Disk Management console.
What should you do?
A. In the Disk Management console, configure shadow copies.
B. Reset the iSCSI initiator name to the default name.
C. In the Disk Management console, rescan the disks.
D. Install and configure Microsoft Multipath I/O (MPIO).
Answer: D
Explanation:
Consider using multipath I/O software: In a highly available storage fabric, you can deploy failover
clusters with multiple host bus adapters by using multipath I/O software.
This provides the highest level of redundancy and availability. For Windows Server 2008 R2, your multipath
solution must be based on Microsoft Multipath I/O (MPIO).
Your hardware vendor will usually supply an MPIO device-specific module (DSM) for your hardware,
although Windows Server 2008 R2 includes one or more DSMs as part of the operating system.
Multipath I/O Overview
Applies To: Windows Server 2008 R2
Multipathing Support for High Availability
WindowsServer@2008 includes many enhancements for the connectivity of a computer running a Windows server-class operating system to storage area networking (SAN) devices. Among the enhancements enabling high availability for connecting Windows-based servers to SANs is integrated Multipath I/O (MPIO) support. Microsoft MPIO architecture supports iSCSI, Fibre Channel and serial attached storage (SAS) SAN connectivity by establishing multiple sessions or connections to the storage array.
Multipathing solutions use redundant physical path components - adapters, cables, and switches - to create logical paths between the server and the storage device. In the event that one or more of these components fails, causing the path to fail, multipathing logic uses an alternate path for I/O so that applications can still access their data. Each network interface card (in the iSCSI case) or HBA should be connected by using redundant switch infrastructures to provide continued access to storage in the event of a failure in a storage fabric component.
Failover times vary by storage vendor, and can be configured by using timers in the Microsoft iSCSI Software Initiator driver, or modifying the Fibre Channel host bus adapter driver parameter settings.
New MPIO features in Windows Server2008 include a Device Specific Module (DSM) designed to work with storage arrays that support the asymmetric logical unit access (ALUA) controller model (as defined in SPC3), as well as storage arrays that follow the Active/Active controller model.
Features of the included DSM
The Microsoft DSM provides the following load balancing policies. Note that load balance policies are generally dependent on the controller model (ALUA or true Active/Active) of the storage array attached to Windows-based computers.
Failover No load balancing is performed. The application specifies a primary path and a set of standby paths. The primary path is used for processing device requests. If the primary path fails, one of the standby paths is used. Standby paths must be listed in decreasing order of preference (the most preferred path first). Failback Failback is the ability to dedicate I/O to a preferred path whenever it is functioning. If the preferred path fails, I/O is directed to an alternate path until function is restored to the preferred path, but I/O automatically switches back to the preferred path when function is restored. Round-robin The DSM uses all available paths for I/O in a balanced, round-robin fashion. Round-robin with a subset of paths The application specifies a set of paths to be used in a round-robin fashion, and a set of standby paths. The DSM uses paths from primary pool of paths for processing requests, as long as at least one of the paths is available. The DSM uses a standby path only when all primary paths fail. Standby paths must be listed in decreasing order of preference (most preferred path first). If one or more of the primary paths become available, DSM uses the standby paths in their order of preference. For example, given 4 paths - A, B, C, and D - A, B, and C are listed as primary paths, and D is standby path. The DSM chooses a path from A, B, and C in round-robin fashion as long as at least one of them is available.
If all three fail, the DSM uses D, the standby path. If A, B, or C become available, DSM stops using D and switches to available paths among A, B, and C.
Dynamic Least Queue DepthThe DSM routes I/O to the path with the least number of outstanding requests. Weighted PathThe application assigns weights to each path; the weight indicates the relative priority of a given path. The larger the number, the lower the priority. The DSM chooses the path that has the least weight from among the available paths. The Microsoft DSM preserves load balance settings even after the computer is restarted. When no policy has been set by a management application, the default policy that is used by the DSM is either Round Robin, when the storage controller follows the true Active/Active model, or simple failover in the case of storage controllers that support the SPC-3 ALUA model. With simple Failover, any one of the available paths can be used as the primary path, and remaining paths are used as standby paths.
NEW QUESTION: 3
회사에 온 프레미스, 다 계층 PHP 웹 응용 프로그램이 있으며, 최근 회사 발표로 인해 웹 트래픽이 급증하여 가동 중지 시간이 발생했습니다. 앞으로는 예측할 수없는 버스트를 유발할 유사한 발표가있을 것으로 예상되며 예상치 못한 트래픽 증가를 처리 할 수 있는 인프라 기능을 신속하게 개선 할 수 있는 방법을 찾고 있습니다. 응용 프로그램은 현재 2 개의 계층으로 구성됩니다. 웹 계층 (로드 밸런서 및 여러 Linux Apache 웹 서버로 구성됨)과 데이터베이스 계층은 MySQL 데이터베이스를 호스팅하는 Linux 서버를 호스팅합니다.
다음 중 짧은 시간 내에 응용 프로그램의 가용성을 향상시키는 동시에 전체 사이트 기능을 제공하는 시나리오는 무엇입니까?
A. 장애 조치 환경 :
S3 버킷을 생성하고 웹 사이트 호스팅을 위해 구성하십시오.
영역 파일 가져 오기를 사용하여 DNS를 Route53으로 마이그레이션하고 Route53 DNS 장애 조치를 활용하여 S3 호스팅 웹 사이트로 장애 조치합니다.
B. 온-프레미스 환경에서 트래픽을 오프로드합니다.
CIoudFront 배포를 설정하고 사용자 지정 오리진에서 객체를 캐시하도록 CloudFront를 구성하십시오.
오브젝트 캐시 동작을 사용자 정의하고 오브젝트가 캐시에 있어야하는 TTL을 선택하십시오.
C. 하이브리드 환경 :
EC2에서 웹 서버를 시작하는 데 사용할 수있는 AMI를 생성하십시오.
AMI를 사용하여 들어오는 트래픽을 기반으로 웹 계층을 확장하는 Auto Scaling 그룹을 생성합니다.
온 프레미스 웹 서버와 AWS에서 호스팅되는 서버 간의 트래픽 균형을 유지하려면 Elastic Load Balancing을 활용하십시오.
D. AWS로 마이그레이션 :
온 프레미스 웹 서버를 AMI로 신속하게 변환하려면 VM Import / Export를 사용하십시오.
가져온 AMI를 사용하여 들어오는 트래픽을 기반으로 웹 계층을 확장하는 Auto Scaling 그룹을 생성합니다.
RDS 인스턴스와 온 프레미스 MySQL 서버간에 RDS 읽기 전용 복제본을 만들고 복제를 설정하여 데이터베이스를 마이그레이션합니다.
Answer: B
Explanation:
설명:
사용자 지정 오리진을 통해 온 프레미스 웹 환경 앞에 CloudFront를 배치 할 수 있습니다 (오리진은 AWS에있을 필요는 없음). 이는 CloudFront가 캐시에서 벗어날 수있는 트래픽을 처리 할 수 있도록 하여 예기치 않은 트래픽 버스트를 방지하여 온 프레미스 웹 서버에서 일부로드를 제거합니다.
NEW QUESTION: 4
You noticed that CPU cores on the Security Gateway are usually 100% utilized and many packets were dropped. You don't have a budget to perform a hardware upgrade at this time. To optimize drops you decide to use Priorities Queues and fully enable Dynamic Dispatcher. How can you enable them?
A. fw ctl multik dynamic_dispatching set_mode 9
B. fw ctl multik set_mode 9
C. fw ctl multik pq enable
D. fw ctl multik dynamic_dispatching on
Answer: B
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