Arcitura C90.06
Cloud Service A is hosted by Virtual Server A. Cloud Storage Device A contains LUN A. Cloud Storage Device A is a multi-tiered cloud storage device with different types of disk groups that perform at different levels. LUN A is located in the disk group with the highest performance level. Cloud Service B is hosted by Virtual Server B. Virtual Servers A and B are hosted by HypervisorA, which is installed on a physical server (not shown) that resides in Cloud A. A redundant implementation of LUN A is replicated synchronously to Cloud Storage Device C. Cloud Storage Device C does not support multiple types of disk groups and resides in Cloud B, which is located in a different geographic region than Cloud A. Requests that cloud service consumers send to Cloud Services A and B are intercepted by an automated scaling listener responsible for initiating scaling activities. 
Cloud Service Consumer A issues a request to Cloud Service A (1). To process the request, Cloud Service A accesses LUN Aon Cloud Storage Device A (2). Cloud Service Consumer B issues a request to Cloud Service B (3). To process the request, Cloud Service B accesses LUN B on Cloud Storage Device B (4). When Cloud Service Consumer A accesses Cloud Service A, there is usually no noticeable performance fluctuation, even during peak usage periods. However, recently, Cloud Storage Device A became unexpectedly unavailable, requiring that Cloud Service A access LUN A on Cloud Storage Device C instead. During the following outage period for Cloud Storage Device A, Cloud Service Consumer A encounters inconsistent performance from Cloud Service A, including unusual delays that occur whenever the data requested by Cloud Consumer A isn't cached and Cloud Service A is required to retrieve the data from LUN A. Which of the following statements describes a solution that can address this problem?
Cloud Service A is a SaaS product offered by the cloud provider to the general public, and is therefore
used by numerous cloud consumers from different organizations at different times. Cloud Service B is
also a SaaS product as part of the same overall solution as Cloud Service A.
However, because a given cloud service consumer only needs to access Cloud Service B when the
data it receives from Cloud Service A meets certain criteria, it is not used nearly as much as Cloud
Service A. Cloud Service A currently has a hard threshold allowing no more than 10 concurrent
instances of it to exist at once. One day, Cloud Service Consumer A attempts to access Cloud Service
A as the eleventh cloud service consumer, and is predictably rejected.
Cloud Service Consumer A belongs to Organization A, one of the cloud provider's most important
customers. Therefore, when Organization A complains about not being able to access Cloud Service A
during peak usage times, the cloud provider agrees to provide a solution.
As a result of a natural disaster, the cloud provider's data center that houses Physical Server A
becomes unexpectedly unavailable. Physical Server A subsequently becomes unavailable for nearly
two days. This outage exceeds what the cloud provider guaranteed in its original SLA and the cloud
provider agrees to not charge Organization for usage fees for an entire month as compensation.
However, the unavailability of Physical Server A had a significant impact on Organization As business,
resulting in financial loss and loss of confidence of its clients.
Organization A informs the cloud provider that it cannot continue working with this cloud unless the
cloud provider can guarantee that the availability of Physical Server A will no longer be dependent on
a single data center or a single geographic region.
Organization B receives its latest monthly invoice from the cloud provider and discovers that the
charges are identical to the invoice it received last month, even though the usage and administration
portal shows that its data usage is a third less. They bring this issue to the attention of the cloud
provider and are informed that they are currently subscribed to a fixed-allocation plan.
The cloud provider explains that in order to get them on a plan whereby they are charged only for
actual data usage, Cloud Storage Device B would need to be upgraded and a system capable of
tracking runtime usage would need to be established. Organization B asks the cloud provider to make
these changes.
Which of the following statements provides a solution that can address Organization A's and
Organization B's issues?
An unexpected outage occurs in Cloud A, making Cloud Service A unavailable. Organization A notices
that its cloud resource administrator can continue accessing data in Cloud Storage Device A via a
usage and administration portal. Cloud Service Consumer A is unable to access data in Cloud Storage
Device A via Cloud Service A during the outage. The cloud resource administrator manually restarts
Cloud Service A and it continues to function normally.
Organization A needs to change the cloud architecture so that when Cloud Service A fails, three
automated attempts are made to recover it before a manual restart is required.
Due to data storage regulations, Organization A is prohibited from storing some types of data across
more than one cloud storage device. A large amount of the data in Cloud Storage Device A is subject
to these regulations. Because of an increase in usage, the capacity of Cloud Storage Device A has
reached its limit, resulting in regular delays and lag time when processing data access requests
during peak usage times.
A management change by another cloud consumer organization inadvertently reconfigures settings
in the failover system used in Cloud A for Cloud Storage Device A. Organization A complains to the
cloud provider who promises to take the steps required to prevent management tasks performed by
other cloud consumer organizations from affecting IT resources being used by Organization A.
Which of the following statements describes a solution that can resolve all of these issues?
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?
Cloud Service Consumers A, B and C simultaneously access Cloud Service A. Cloud Service Consumer
C receives a runtime exception and its request for access is rejected. It is determined that Cloud
Service Consumer C attempted to upload a large amount of input data for Cloud Service A, which
exceeded the bandwidth threshold of the virtual network. The cloud architecture needs to be
improved to avoid this from happening again.
Cloud Service Consumer C's repeated access of Cloud Service B imposes workloads that are large and
highly unpredictable. After some time, Cloud Service B begins to delay its responses and sometimes
times out entirely. The cloud resource administrator discovers that Virtual Server B is unstable and
close to failure primarily because its CPU and memory resources are being used to their maximum
capacity.
Cloud Services C and D are being positioned as SaaS products for use by a range of cloud consumer
organizations. After their initial release, they begin to quickly use up the available memory in Virtual
Server C, primarily because of the large amounts of state and session data they need to place into
memory for extended periods.
Which of the following statements lists the patterns that can be applied to solve these three
requirements and problems?
Developers access Ready-Made Environment A to work on the development of a new solution (1).
During this usage. Ready-Made Environment A regularly reads and writes data to Cloud Storage
Device A (2). Cloud Service Consumer B accesses Cloud Service A (3). Cloud Service A queries data
residing in Cloud Storage Device A in response to processing requests from Cloud Service Consumer
B (4).
Hypervisor A is made part of a cluster of hypetvisors. Ready-Made Environment A, which is still
hosted by Virtual Server Aon Hypervisor A, subsequently becomes unexpectedly unavailable. It then
takes twenty minutes to pass before Virtual Server A and Ready-Made Environment A become
available again on Hypervisor B (a hypervisor that is also part of the hypervisor cluster). This delay is
considered unacceptable by Cloud Consumer A. Furthermore, after being relocated
to Hypervisor B, Virtual Server A is unable to connect to the network. By the time the cloud provider
rectifies this second problem, Cloud Consumer A experiences a total of two hours of downtime.
Which of the following statements describes a solution that can minimize or entirely avoid a delay for
the runtime relocation of Ready-Made Environment A?Cloud Service A is installed on Virtual Server A and the database it accesses is located on Cloud Storage Device A. Both Virtual Servers A and B are hosted by Hypervisor A. Requests from cloud service consumers are intercepted by an automated scaling listener that automatically routes subsequent requests to additional instances of Cloud Service A whenever the given usage of an instance exceeds two concurrent requests. 
Cloud Service Consumer A accesses Cloud Service A (1), which either sends a query or a read/write request to a database on Cloud Storage Device A (2). A usage and administration portal is available, enabling Cloud Consumer A to view the billing and usage history of Virtual Servers A and B (3). Cloud Service Consumer A and Cloud Consumer A are owned by Organization A. which performs several tests on the cloud architecture that produce the following results: A stress test is performed to generate workloads on Virtual Servers A and B to gauge their load capacity. This test reveals that both virtual servers have firm workload thresholds. If the workload capacity on either virtual server reaches its threshold, further processing requests are rejected. An availability test shows that Cloud Service A becomes unavailable whenever Hypervisor A crashes. A security test is carried out during which the cloud architecture is accessed by a malicious cloud consumer that disables the path used by Cloud Service A to access Cloud Storage Device A, thereby causing all subsequent cloud service consumer requests to be replied to with data access errors. Which of the following statements describes a solution that addresses the concerns raised by the three tests?
Virtual Server A and Virtual Server B are hosted by Hypervisor A, which resides on Physical Server A. Virtual Server A hosts Cloud Service A. Virtual Server C. Virtual Server D, Virtual Server E and Virtual Server F are hosted by Hypervisor B on Physical Server B. Physical Server C, which hosts Hypervisor C, is currently not being used. Cloud Service Consumer A accesses Cloud Service A (1), which accesses files stored in a folder on Virtual Server A (2). Cloud Consumer B uses Proprietary User Portal A to administer legacy software (not shown) installed on Virtual Server D (3). Proprietary User Portal B and Proprietary User Portal C are also available for accessing additional legacy systems located on Virtual Server F; however, they are not often used. 
The cloud shown in the figure is a private cloud. Department A and Department B share IT resources within the private cloud and are part of the same organization. Cloud Service Consumer A belongs to Department A and Cloud Consumer B belongs to Department B. During routine access of Cloud Service A by Cloud Service Consumer A, the Department A cloud resource administrator is notified that a hardware fault is occurring within Physical Server A that will soon cause it to fail. The cloud resource administrator scrambles to arrange for Cloud Service A to be relocated but is unable to do so before Physical Server A does fail. It takes several more hours of downtime until, with the cooperation of the cloud provider, the Cloud Service A implementation is successfully moved to Physical Server C and made live again. Managers at Department A demand that a system be put in place to avoid this scenario in the future. Cloud Service A was initially developed specifically for Department A's Cloud Service Consumer A. However, recently Department B has indicated that it will be developing its own cloud service consumer that will also need to regularly access Cloud Service A. After this new cloud service consumer is deployed, both Department A and Department B experience occasional runtime errors when their cloud service consumers attempt to access Cloud Service A at the same time. Cloud Service A accesses a legacy system on Virtual Server A that requires regular updates and patches to stay current. Each time the legacy system is updated, Cloud Service A needs to undergo an update as well, during which it needs to be temporarily unavailable. Department A managers ask the cloud provider to extend the cloud architecture so that a duplicate, secondary implementation of Cloud Service A can be made available while the primary implementation undergoes a maintenance update. Which of the following statements provide a solution that can adequately resolve all of Departments A and B's issues?
Virtual Server A is hosted by Hypervisor A, which resides on Physical Server A. Virtual Server A hosts Cloud Services A and B. Virtual Server B is hosted by Hypervisor B on Physical Server B. Physical Server C is currently not being used. Cloud Service Consumer A sends a request to Cloud Service A that is intercepted by Pay-Per-Use Monitor A (1), which collects billing-related usage data that is later forwarded to the billing management system (2). Cloud Service A receives and processes the request (3). Cloud Consumer B accesses the usage and administration portal (4) to access data on Cloud Storage Device B. Pay-Per-Use Monitor B intercepts the data access to collect and forward billing-related usage data to the billing management system (5). Cloud Storage Device B processes the data access request from Cloud Consumer B (6). 
Cloud Service Consumer A and Cloud Consumer B belong to Organization A Cloud Storage Device B is accessed on a regular basis by Cloud Consumer B. However, managers at Organization A receive reports from their cloud resource administrator that Cloud Storage Device B is unavailable for longer periods and more frequently than what they expected, based on the SLA availability guarantee they were provided by the cloud provider. This results in wasted time when the cloud resource administrator attempts to upload or access data and then discovers that Cloud Storage Device B is unavailable. The cloud resource administrator requires a means of checking for the availability of Cloud Storage Device B prior to attempting access. As the workload increases on Physical Server B, Cloud Consumer B begins to receive runtime exceptions and degraded data access performance from Cloud Storage Device B. It is determined that the cause of the deteriorating performance is a network bottleneck that has formed on Physical Server B due to its bandwidth capacity being reached, primarily because of other cloud consumer organizations also sharing its hosted IT resources. Organization A receives a monthly billing statement that shows the charges for the total usage of Cloud Service A during that period. However, Organization A requires a more detailed breakdown of the types of usage and their associated costs. For example, Cloud Service Consumer A can issue requests for information by employees within Organization A and on behalf of clients of Organization A. Organization A requires a breakdown of the usage costs incurred on behalf of clients so that it can bill the clients for this usage accordingly. The cloud provider informs Organization A that it has no existing monitor that can collect and log this detailed usage information and suggests that Organization A customize its own monitor. Which of the following statements lists the patterns that can be applied to solve these three problems?
Each service instance of Cloud Service A requires a virtual server with 2 virtual CPUs and 4 GBs of
RAM at a package price of $2.00 for each initial invocation and an additional $0.50 for each
consecutive 60 seconds of usage. Cloud Service Consumer A accesses Cloud Service A twice in one
day. The two exchanges with Cloud Service A last 60 seconds and 120 seconds. For that one day, the
organization that owns Cloud Service Consumer A is billed $6.50, which it determines is incorrect.
After complaining to the cloud provider, it is discovered that the rapid provisioning system
responsible for provisioning instances of Cloud Service A is not de-provisioning Cloud Service A when
Cloud Service Consumer A indicates it has completed an exchange. Instead, Cloud Service A is de-
provisioned after a 60 second timeout that occurs after Cloud Service Consumer A is completed with
an exchange.
Storage space on Cloud Storage Device A can only be purchased in units of terabytes (TBs), with each
TB costing $1 per day. Cloud Consumer B purchases 5 TBs of storage space on day 1 and stores 5 TBs
of data on days 6 and 7. Cloud Consumer B was expecting to be billed $10.00, but is billed $35. After
raising a complaint, Cloud Consumer B is informed by the cloud provider that cloud consumers are
billed based on the allocation of storage space, regardless of how much storage space they actually
use.
Which of the following statements describes a solution that can update the cloud architecture to
avoid these billing-related problems and discrepancies?