Introduction to Cloud Computing Zsolt Németh MTA SZTAKI

As it started

Gartner’s Hype Cycle on Emerging Technologies 2011

Current trends Cloud computing Grid Computing Distributed Computing

Gartner’s Hype Cycle on Emerging Technologies 2012

Concepts and definitions

Dreams and Concepts Cost-effective Utility computing Easy access to resources Self-service Pay-as-you-go Cut administration & maintenance Power efficiency Improve resource utilisation Use available resources Software as a service Reduced HW investments Reduced personnel cost

Driving forces: commerce Strong industrial needs and driving forces – Improve resource utilisation – Use available resources efficiently – Save energy – Decrease cost Consumer needs – Cost effectiveness – Easy access to resources – Pay-as-you-go – No initial investments – Self-service

Why Cloud?

Provides services – Resources, applications, tools – Large-scale, heterogeneous, economic, mobile, green Unaware where it is Unaware what it is actually Unaware how it is realized Unaware of its size The cloud is „something”

Misconcepts Always available Infinite resources High performance Minimal costs Green infrastructure Scalability, elasticity Accessible These must be relatively assessed

Real characteristics An economic model for resource – Provisioning – Management Realizes utility computing Elastic Increased availability and reliability Improved accessibility – ease of use Reduced cost

Cloud characteristics TechnologyBusinessSocial / LegalOther Elasticity / Scalability OutsourcingSecurityMulti-tenancy VirtualisationPay per useProvenanceEase of Use Agility & adaptability Resource utilisationPrivacy AvailabilityEnergy efficiency Data ManagementCost efficiency ReliabilityAccounting Programmability K. Jeffery and B. Neidecker-Lutz: „Advances in Clouds – Research in Future Cloud Computing”. Expert Group Report, 2012.

Relation to other areas K. Jeffery and B. Neidecker-Lutz: „Advances in Clouds – Research in Future Cloud Computing”. Expert Group Report, 2012.

An “official” definition A 'cloud' is an elastic execution environment of resources involving multiple stakeholders and providing a metered service at multiple granularities for a specified level of quality (of service). L. Schubert, K. Jeffery and B. Neidecker-Lutz: „The Future of Cloud Computing, Opportunities for European Cloud Computing beyond 2010”. Expert Group Report, 2010.

Another “official” definition Cloud computing is a model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction. This cloud model is composed of five essential characteristics, three service models, and four deployment models. P. Mell, T. Grance: “The NIST Definition of Cloud Computing”. National Institute of Standards and Technology, Special Publication , 2011

Essential characterisitcs

Essential chracteristics On-demand self-service A consumer can unilaterally provision – computing capabilities – server time – network storage as needed, automatically without human interaction

Essential chracteristics Broad network access Capabilities are available over the network – accessed through standard mechanisms – by heterogeneous client platforms mobile phones Tablets Laptops workstations

Essential chracteristics Resource pooling The provider’s resources (storage, processing, memory, and network bandwidth) are pooled serve multiple consumers – multi-tenant model physical and virtual resources – dynamically assigned and reassigned according to consumer demand location independence – but may specify location at a higher level of abstraction

Essential chracteristics Rapid elasticity Capabilities can be elastically provisioned and released – in some cases automatically – scale rapidly with demand appear to be unlimited

Essential chracteristics Measured service control and optimize resource use by leveraging a metering capability Resource usage – Monitored – Controlled – Reported providing transparency for both the provider and consumer.

Service models

Service models: SaaS Software as a Service (SaaS) The provider’s applications running on a cloud infrastructure. Accessible from various client devices – thin client interface, such as a web browser – program interface The consumer does not manage or control the underlying cloud or even individual application capabilities

Software as a Service L. Badger, T. Grance, R. Patt-Corner, J. Voas: “Cloud Computing Synopsis and Recommendations”. National Institute of Standards and Technology, Special Publication , 2012

Service models: PaaS Platform as a Service (PaaS). Deploy onto the cloud infrastructure consumer-created or acquired applications – created using programming languages, libraries, services, and tools supported by the provider. The consumer does not manage or control the underlying cloud infrastructure but – has control over the deployed applications

Platform as a Service L. Badger, T. Grance, R. Patt-Corner, J. Voas: “Cloud Computing Synopsis and Recommendations”. National Institute of Standards and Technology, Special Publication , 2012

Service models: IaaS Infrastructure as a Service (IaaS) Provision processing, storage, networks, and other fundamental computing resources – the consumer is able to deploy and run arbitrary software, 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

Infrastructure as a Service L. Badger, T. Grance, R. Patt-Corner, J. Voas: “Cloud Computing Synopsis and Recommendations”. National Institute of Standards and Technology, Special Publication , 2012

Infrastructure as a Service L. Badger, T. Grance, R. Patt-Corner, J. Voas: “Cloud Computing Synopsis and Recommendations”. National Institute of Standards and Technology, Special Publication , 2012 PaaS IaaS

Virtualisation Simulation of the hardware and software environment in which other software runs Simulated environment = virtual machine (VM) Coupling between the physical layer and the guest OS = hypervisor, virtual machine monitor – Controls flow of instructions – Partitions resources – Isolates guest OSs – Provides the interface of a real physical hardware machine Guest OS + applications encapsulated = image

Virtualisation Darryl Chantry: Mapping Applications to the Cloud. Microsoft Corporation, 2009

Deployment models

Private cloud The cloud infrastructure is provisioned for exclusive use by a single organization – comprising multiple consumers (e.g., business units)

Private cloud L. Badger, T. Grance, R. Patt-Corner, J. Voas: “Cloud Computing Synopsis and Recommendations”. National Institute of Standards and Technology, Special Publication , 2012

Deployment models Community cloud The cloud infrastructure is provisioned for exclusive use by a specific community of consumers from organizations that have shared concerns (e.g., mission, security requirements, policy, and compliance considerations)

Community cloud L. Badger, T. Grance, R. Patt-Corner, J. Voas: “Cloud Computing Synopsis and Recommendations”. National Institute of Standards and Technology, Special Publication , 2012

Deployment models Public cloud The cloud infrastructure is provisioned for open use by the general public

Public cloud L. Badger, T. Grance, R. Patt-Corner, J. Voas: “Cloud Computing Synopsis and Recommendations”. National Institute of Standards and Technology, Special Publication , 2012

Deployment models Hybrid cloud The cloud infrastructure is a composition of two or more distinct cloud infrastructures (private, community, or public) – remain unique entities – bound together by standardized or proprietary technology that enables data and application portability

What next…

You will learn IaaS middleware in-depth: OpenNebula OpenNebula hands-on Cooperation of multiple clouds – Cloud bursting – Cloud federations – Multi-clouds – Cloud and grid interoperation CloudBroker hands-on

References L. Schubert, K. Jeffery and B. Neidecker-Lutz: „The Future of Cloud Computing, Opportunities for European Cloud Computing beyond 2010”. Expert Group Report, K. Jeffery and B. Neidecker-Lutz: „Advances in Clouds – Research in Future Cloud Computing”. Expert Group Report, M. Armburst, A. Fox, R. Griffith, A.D. Joseph, R. Katz, A. Kowinski, G. Lee, D. Patterson, A. Rabkin, I. Stoica, M. Zaharia: “Above the Clouds: A Berkeley View of Cloud Computing”. White paper, 2009 L. Badger, T. Grance, R. Patt-Corner, J. Voas: “Cloud Computing Synopsis and Recommendations”. National Institute of Standards and Technology, Special Publication , 2012 P. Mell, T. Grance: “The NIST Definition of Cloud Computing”. National Institute of Standards and Technology, Special Publication , 2011