Introduction to Cloud Computing

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1 Institute of Informatics - UFRGS September 2013

2 Outline Virtualization

3 References Mell, P., & Grance, T. (2011). The NIST denition of cloud computing (draft).nist special publication, 800, 145. Bojanova, I., & Samba, A. (2011, March). Analysis of Cloud Computing Delivery Architecture Models. In Advanced Information Networking and Applications (WAINA), 2011 IEEE Workshops of International Conference on (pp ). IEEE. Panorama du Cloud Computing, Didier Donsez, Noël de Palma, Alain Tchana, LIG ERODS. ICAR 2013 Cloud Computing.

4 Section 1 Virtualization

5 Section 2

6 Denitions Cloud Computing a computational model for enabling ubiquitous, convenient, on-demand network access to a shared pool of congurable computing resources that can be rapidly provisioned and released with minimal management eort or service provider interaction. 5 essential characteristics, 3 service models, and 4 deployment models.

7 Denitions Cloud Infrastructure the collection of hardware and software that enables the ve essential characteristics of cloud computing. It can be viewed as containing both a physical layer and an abstraction layer. The physical layer consists of hardware: server, storage and network components. The abstraction layer consists of software deployed across the physical layer, which manifests the essential cloud characteristics.

8 Denitions Essential Characteristics On-demand self-service. A consumer can unilaterally provision computing capabilities. Broad network access. Capabilities are available over the network and accessed through standard mechanisms. Resource pooling. Resources are pooled to serve multiple consumers using a multi-tenant model. Rapid elasticity. Capabilities can be elastically provisioned and released, in some cases automatically. Measured service. Cloud systems automatically control and optimize resource use by leveraging a metering capability.

9 Denitions Economic Models Free Free-tier period. On-demand Duration and quantity of used resources (bandwidth, I/O, CPU time, RAM). Year/Month Subscription Levels of SLA, QoS. Auction Spot instances. Re-sellers 3rd party sellers.

10 Denitions Benets Quick allocation/des-allocation (on-demand) of resources. 24/7 access from a browser. Ease of use. Smaller TCO. lesser personnel pay for what you use Ease of payment. not need for a big budget using vs. payment

11 Denitions Challenges Security and Trust. Warranty of service (SLA). Energetic eciency/impact. Detailed monitoring for billing. Standardization. to ease interoperability and portability For applications and customized hardware.

12 Section 3

13 Service Models Software as a Service (SaaS). The capability provided to the consumer is to use the provider's applications running on a cloud infrastructure. The applications are accessible from various client devices through either a thin client interface, or a program interface. The consumer does not manage or control the underlying cloud infrastructure: network, servers, operating systems, storage, or even individual application capabilities

14 Service Models Platform as a Service (PaaS). The capability provided to the consumer is to deploy applications onto the cloud infrastructure using programming languages, libraries, services, and tools supported by the provider. The consumer does not manage or control the underlying cloud infrastructure: network, servers, operating systems, storage, or even individual application capabilities

15 Service Models Infrastructure as a Service (IaaS). The capability provided to the consumer is to provision processing, storage, networks, and other fundamental computing resources where the consumer is able to deploy and run arbitrary software, including operating systems and applications. The consumer does not manage or control the underlying cloud infrastructure: but has control over operating systems, storage, and deployed applications

16 Service Models

17 Service Models

18 Deployment Models Private cloud. provisioned for exclusive use by a single organization It may be owned, managed, and operated by the organization, or a third party, and it may exist on or o premises. Community cloud. provisioned for exclusive use by a specic community of consumers from organizations that have shared concerns It may be owned, managed, and operated by one or more of the organizations in the community, a third party, or some combination of them, and it may exist on or o premises.

19 Deployment Models Public cloud. provisioned for open use by the general public. It may be owned, managed, and operated by a business, academic, or government organization, or some combination of them. It exists on the premises of the cloud provider. Hybrid cloud. a composition of two or more distinct cloud infrastructures that remain unique entities, but are bound together by standardized or proprietary technology that enables data and application portability.

20 Service Models Actors in a Cloud Provider Owner of the hardware. Re-seller Gives users services, but doesn't own the hardware. User Developer Produces tools for cloud.

21 Section 4

22 Azure Platform

23 Elastic Compute Cloud

24 Section 5

25 References ARC202 Architecting for High Availability - AWS re: Invent 2012 by Amazon Web Services on Nov 29, 2012 Weygant, P. S. (2001). Clusters for High Availability: A Primer of HP Solutions. Prentice Hall.

26 Denitions Amazon Web Services (AWS) Cloud provider Platform for highly available systems Reliable, costable, failure-tolerant, with minimun human interaction.

27 Denitions High Availability

28 Denitions High Availability Availability Period of time when services are available, or time required for a system response any loss is considered an interruption Highly available A system designed to avoid service losses, reducing and managing failures It is required for important services (life, health, wealth) Any loss is not acceptable

29 Denitions IT High Availability As important as electric energy Is not the same as unlimited availability and always will relate to the service

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47 So, can your grid do that?

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