Moving beyond traditional heavy virtual machines, microservices are packaged inside lightweight, portable containers, with orchestrators like Kubernetes managing deployment at massive scale. 6. Challenges and Future Research Directions
Focus slides: Salesforce, Office 365, Zoom. The paradigm shift here is single-instance, multi-tenant software. The PPT offers a case study on how Salesforce customizes "metadata" rather than code for each tenant.
Five essential characteristics of cloud computing are identified: The latter half of the presentation typically shifts
: Delivering computing as a metered service, similar to a public utility.
The latter half of the presentation typically shifts from theory to practice. Instance Families (Compute vs.
Service Level Agreements (SLAs) are binding, enforceable contracts between a cloud vendor and a consumer. They define explicit performance boundaries, including minimum uptime guarantees (e.g., 99.99%), maximum latency thresholds, and financial penalties for service outages. Green Cloud Computing
Organizations choose distinct deployment models based on security, compliance, scalability, and cost requirements. Public Cloud including minimum uptime guarantees (e.g.
Users can provision computing capabilities (like server time and network storage) automatically without requiring human interaction with the service provider.
Dr. Buyya’s research heavily emphasizes a market-oriented approach where resource allocation is driven by supply, demand, and economic principles. Service Level Agreements (SLAs)
: Cloud systems automatically control and optimize resource use by leveraging a metering capability. Foundational Paradigms
Focus slides: Virtualization, Hypervisors (KVM, Xen, ESXi), Instance Families (Compute vs. Memory vs. Storage optimized). The 2021 update adds a comparison table of , acknowledging that IaaS now includes "Metal as a Service" for legacy or high-compliance workloads.
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