Page 114 - Binder2
P. 114
2030
✓ Applications can be accessed ✓ Security Issue:
over the network.
Control on physical security is lost in cloud computing
✓ The application can be because resources are shared with many users and no
configured or manipulated at one knows where the resources are run.
any time.
There is storage incompatibility between different
✓ To access or manipulate cloud services vendors, there is no common standard
software there is no need to to ensure data integrity until now.
install software on the
inhouse computers. ✓ Costing Issue: Some of the cloudcomputing resource is
free, meanwhile, the other is chargeable.
✓ Platform as a Service Model
in cloud computing offers ✓ Service Level Agreements (SLAs) Issue: While shifting the
online core business from one cloud model to another consumer
developmental/deployment need to make sure the quality, availability, reliability and
tools and programming performance of the underlying resources. The consumer
runtime environment. needs to get a guarantee from the service provider on
service delivery.
✓ Every type of client has
independent access over the ✓ Migration Issue: When data of organizations is shifted from
cloud resources over the one cloud to another there are some security or privacy
network. issues. IT system like IT management and personal
applications are most easily moved. But organizations are
✓ Ondemand selfservice is less reluctant in moving from IAAS to SaaS cloud, because
offered in the cloud marginal functions are outsourced to the cloud and core
computing. The client uses activities are kept in the house.
the resources without
interacting with the cloud ✓ Predictable and unpredictable workloads
service provider. ✓ scalability and flexibility: The scalability and flexibility are
✓ Cloud computing operates at the most important features that drive the emergence of
higher efficiencies with Cloud Computing. Cloud services and computing platforms
greater utilization, offered by computing Clouds could be scaled across various
concerns, such as geographical locations, hardware
✓ Cloud computing is more performance, and software configurations. The computing
economical. It only requires platforms should be flexible to adapt to various
an Internet connection. requirements of a potentially large number of users.
✓ Handling LongRunning Jobs: In the cloud, some types of
✓ Cloud computing is jobs run for long hours. For these types of jobs, resources
more reliable as it is based on should be available without any interruption or failure.
load balancing technology Automatic techniques should be adopted to detect
unavailability or failure and then automatically transfer the
workload to the available resources. This process must be
carried out in much less time so that the user can not notice
the uninterruption or failure.
DeLone and McLean Models of Information Systems Success
(D&M IS)
D&M originally developed by DeLone and McLeanin andrefined later in
furtherworkin , and , , Figure illustratestheupdatedD&Mmodel
397
