Start point: October/November 2007 ibm blue Cloud

"A Cloud is a type of parallel and distributed system consisting of a collection of interconnected and virtualized computers that are dynamically provisioned and presented as one or more unified computing resources based on service-level agreements established through negotiation between the service provider and consumers” (Buyya et al.)

• "A Cloud is a type of parallel and distributed system consisting of a collection of interconnected and virtualized computers that are dynamically provisioned and presented as one or more unified computing resources based on service-level agreements established through negotiation between the service provider and consumers” (Buyya et al.)

• “A large-scale distributed computing paradigm that is driven by economies of scale, in which a pool of abstracted, virtualized, dynamically-scalable, managed computing power, storage, platforms, and services are delivered on demand to external customers over the Internet” (Foster et al.)

• Start point: October/November 2007 - IBM Blue Cloud

http://www.ibm.com/ibm/cloud/

• http://www.ibm.com/ibm/cloud/

• « Values to customers include:

• Reducing IT management complexity and skill requirements
• Sharing resources among multiple applications
• Accelerating application launches
• Supporting both existing and emerging, data-intensive workloads

• »

Compute Cloud EC2 (Elastic Cloud Computing)

• Compute Cloud EC2 (Elastic Cloud Computing)

• « Private » virtualized servers (« instances ») of different types
• Example: High-CPU Extra Large Instance
• 7 GB of memory
• 20 EC2 Compute Units
• 1690 GB Storage
• Pricing on a per hour basis for each instance type: from $0.084/hour for the smallest "On-Demand" virtual machine running Linux to 12x more for the largest one running Windows (Nov. 2009). The data transfer charge ranges from $0.08 to $0.15 per gigabyte, depending volume

• Data Cloud S3 (Simple Storage Service)

• from $0.55 to $0.15 per GB-month, + bandwidth usage (from $0.08 to 0.15 per GB) + requests (from $0.01 to $0.1 per 1000 requests)
• 102 billion objects stored files (March 2010)
• data transfer is charged by TB / month data transfer, depending on the source and target of such transfer.

Infrastructure as a Service (IaaS)

• Infrastructure as a Service (IaaS)

• provides computing environments/infrastructure i.e., hardware, software
• the provisioned infrastructure can dynamically scale up and down depending on the actual needs
• Amazon EC2 and S3

• Platform as a Service (PaaS)

• high-level integrated environment to build and deploy applications
• restrictions on the type of applications
• but scalable platform
• Google’s App Engine for deploying Web applications

• Software as a Service (SaaS)

• delivers software to consumers through the Internet
• Salesforce: online CRM (Customer Relationship Management) Services ; Live Mesh from Microsoft: files and folders synchronization

From the customer point of view:

• From the customer point of view:

• Scalability
• Reliability
• Security and Privacy
• Ubiquitous and fast access
• Quality of Service
• Service Level Agreement
• Pricing system
• Simple to use

• From the internal point of view

• Virtualization
• « Grid » management