A Review of Evolutionary Trends in Cloud Computing and Applications to the Healthcare Ecosystem

Table 2

Obstacle and opportunities for cloud computing development.

SN	Obstacles	Opportunities
1	Availability/business continuity/interoperability/scalable storage	Use multiple cloud providers to ensure that user’s requirements are met by providing federated computational resources and storage
2	Data confidentiality and auditability	Deploy encryption, VLANs, firewalls
3	Performance unpredictability	Improve VM support, flash memory, gang schedule VMs
4	Bugs in large distributed system	Invent debugger that relies on distributed VMs
5	Scaling quickly	Invent autoscaler that relies on machine learning; snapshots for conservation
6	Reputation fate sharing	Offer reputation-guarding services like those for e-mail
7	Software licensing	Pay-for-use licenses