Ready-Made Environment A is hosted by Virtual Server A and Ready-Made Environments is hosted by Virtual Server B.
Virtual Servers A and B are hosted by Hypervisor A, which is part of a hypervisor cluster. An automated scaling listener intercepts cloud consumer requests and automatically invokes the on-demand generation of additional instances of ready-made environments, as required.
A self-service portal and a usage and administration portal are also available to cloud consumers. The self-service portal can be used to request the provisioning of a new ready- made environment. Any cloud consumer that has already had a ready-made environment provisioned can configure and view information about that ready-made environment via the usage and administration portal.
Cloud Consumer A accesses Ready-Made Environment A to work on the development of a new cloud service (1). Cloud Consumer B accesses Ready-Made Environment B to test a recently completed application comprised of three cloud services (2). Cloud Consumer C accesses the self-service portal to request the creation of a new ready-made environment (3).

The cloud provider is required to perform an emergency maintenance outage on a cloud storage device used by all ready-made environments. The unplanned outage takes two hours. During this period, Cloud Consumers A and B are unable to access Ready-Made Environments A and B and Cloud Consumer C receives an error when submitting a request to create a new ready-made environment.
After the maintenance outage is over, Cloud Consumers A and B encounter the following problems:
* Cloud Consumer A is unable to recover session data that was kept in memory for an extended period, prior to the time of the outage.
* Cloud Consumer B has no access to Virtual Server B, which was moved to Hypervisor B during the maintenance outage. When Cloud Consumer B attempts to ping Virtual Server B, the request times out.
Even though Cloud Consumer C is able to log into the usage and administration portal to confirm that its ready-made environment was successfully provisioned, the unexpected outage has raised concerns about the stability of the ready-made environment's underlying infrastructure. Cloud Consumer C informs the cloud provider that it cannot proceed with its lease of the ready-made environment if there are future occurrences of this type of maintenance outage.
Which of the following statements can help address the problems and concerns of the three cloud consumers?

• A. The Service State Management pattern can be applied to establish a system that can persist session data in a database. The Persistent Virtual Network Configuration pattern can be applied to centralize the configuration data necessary for virtual servers to remain accessible after they have been relocated to different hypervisors. The Storage Maintenance Window pattern can be applied to establish a system that allows cloud storage devices to be maintained without causing outages.
• B. The Elastic Disk Provisioning and Cross-Storage Device Vertical Tiering patterns can be applied to establish a cloud architecture that supports a set of cloud storage devices, each with different tiers that cloud consumers can choose to scale to The Synchronized Operating State pattern can be applied in combination with the Hypervisor Clustering pattern to avoid further virtual server and ready-made environment connectivity problems.
  The Redundant Storage pattern can be applied so that if a cloud storage device fails, a secondary implementation of the cloud storage device automatically takes over processing tasks, thereby avoiding outages.
• C. None of the above.
• D. A combination of the Load Balanced Virtual Server Instances and Synchronized Operating State patterns can be applied to establish a system capable of deferring state across multiple cloud storage devices, each located on a different virtual server. The Elastic Disk Provisioning pattern can be applied to persist virtual server configuration data across hypervisors so that connectivity is preserved whenever a virtual server is relocated to a different hypervisor. The Zero Downtime pattern can be applied to ensure that none of the ready-made environments or virtual servers are subject to a maintenance outage in the future.

Cloud Service A requires access to Cloud Storage Device A and Cloud Storage Device B.
Cloud Service A is hosted by Virtual Server A.
Virtual Server A and Virtual Server B are hosted by Hypervisor A, which resides on Physical Server A.
Cloud Service Consumer A sends a request to access Cloud Service A (1). Cloud Service A retrieves data from Cloud Storage Device A and Cloud Storage Device B (2). Cloud Consumer A uses the usage and administration portal to access resource usage reports for Cloud Service A (3).

Cloud Service Consumer A and Cloud Consumer A belong to Organization A, which is leasing an laaS environment from the cloud provider.
The cloud provider makes Cloud Service A available to several new cloud service consumers. Additionally, new LUNs are created on Cloud Storage Devices A and B for new cloud consumers to perform regular data access functions. This increase in workload causes Virtual Server A to fail during peak usage periods. Organization A and the new cloud consumer organizations request that the cloud provider find a way to dynamically support the higher usage workloads.
Organization A keeps its master files and data in LUN B in Cloud Storage Device B.
One day, a cloud resource administrator accidentally changes the path used to access LUN B.
The original path cannot be retrieved. The cloud resource administrator informs Organization A's IT department that it must change any systems or tools it uses to access LUN B to the new path. This causes significant challenges, as well as a costly period of disruption. Organization A asks the cloud provider to create a system that would help avoid disruption in access to LUN B, if this was to ever happen again.
The cloud provider has made Cloud Storage Device A part of a resource pool of synchronized cloud storage devices. Organization A is sharing Cloud Storage Device A with another cloud consumer organization. When cloud consumers from both organizations access Cloud Storage Device A at the same time, they encounter a resource constraint condition that causes Cloud Storage Device A to fail. Organization A requests that the cloud provider extend the existing cloud architecture to prevent this situation from happening again.
Which of the following statements provides a solution that can address all of these problems?

• A. The Elastic Resource Capacity pattern can be applied to establish a system that can dynamically allocate resources to Virtual Server A.
  The Multipath Resource Access pattern can be applied to establish a multipathing system that can provide an alternative path to LUN B in Cloud Storage Device B.
  The Resource Reservation pattern can be applied to establish a system that enables Organization A to have exclusive access to pre-defined resources on Cloud Storage Device A for a given period of time.
• B. The Elastic Network Capacity pattern can be applied to implement a system that dynamically assigns network ports to Virtual Server A before its processing capacity thresholds are reached. The Redundant Physical Connection for Virtual Servers pattern can be applied to create an alternative path to LUN B in Cloud Storage Device B.
  The Resource Pooling pattern can be applied to synchronize Cloud Storage Device A with other cloud storage devices.
• C. The Resource Reservation pattern can be applied to dynamically provision resources to Virtual Server A whenever its processing thresholds are being reached. The Persistent Virtual Network Configuration pattern can be applied to establish a persistent hyperlink to LUN B over the virtual network that cannot be lost. The Elastic Resource Capacity pattern can be applied to prevent Cloud Storage Device A from encountering resource constraints.
• D. None of the above.