Post on 25-Aug-2020
1
Views of Cloud Computing
Prof. Ravi SandhuExecutive Director and Endowed Chair
March 25, 2016
ravi.sandhu@utsa.eduwww.profsandhu.com
© Ravi Sandhu World-Leading Research with Real-World Impact!
CS 6393 Lecture 7 Part 1
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The Cloud
The Network is the Computer- Sun Microsystems, early 1990s
The Cloud is the Computer- IEEE Spectrum, 2008
Datacenter as a Computer- Barroso and Hölzle, 2009
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Cloudwashing
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The Cloud: Perspectives and Forces
Science
EngineeringBusiness
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NIST Cloud Computing 3-4-5 Definition
2009-201116
versions
5 Essential Characteristics
3 Service Models 4 Deployment Models
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NIST Cloud Computing 3-4-5 Definition
2009-201116
versions
5 Essential Characteristics
3 Service Models 4 Deployment Models
PublicPrivateCommunityHybrid
Software as a Service (SaaS)Platform as a Service (PaaS)Infrastructure as a Service (IaaS)
© Ravi Sandhu 7World-Leading Research with Real-World Impact!
NIST Cloud Computing 3-4-5 Definition
2009-201116
versions
5 Essential Characteristics
3 Service Models 4 Deployment Models
PublicPrivateCommunityHybrid
Software as a Service (SaaS)Platform as a Service (PaaS)Infrastructure as a Service (IaaS)
On-demand self serviceBroad network accessResource pooling (multi-tenant)Rapid elasticityMeasured service
© Ravi Sandhu 8World-Leading Research with Real-World Impact!
NIST Cloud Computing 3-4-5 Definition
2009-201116
versions
5 Essential Characteristics
3 Service Models 4 Deployment Models
PublicPrivateCommunityHybrid
Software as a Service (SaaS)Platform as a Service (PaaS)Infrastructure as a Service (IaaS)
On-demand self serviceBroad network accessResource pooling (multi-tenant)Rapid elasticityMeasured service
Geographic distributionHomogeneityResilienceMassive scaleVirtualizationSecurity
Other Common Characteristics
“We argue that Cloud Computing not only overlaps with Grid Computing, it is indeed evolved out of Grid Computing and relies on Grid Computing as its backbone and infrastructure support.”
I don’t think so
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Cloud and Grid: Foster et al 2008
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Cloud and Grid: Foster et al 2008
1. Coordinates resources that are not subject to centralized control Virtual Organization (VO)
2. Uses standard, open, general-purpose protocols and interfaces Globus toolkit
3. Delivers non-trivial qualities of service
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Grid 3 Point Checklist: Foster 2002
1. Coordinates resources that are not subject to centralized control Virtual Organization (VO)
2. Uses standard, open, general-purpose protocols and interfaces Globus toolkit
3. Delivers non-trivial qualities of service
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Grid versus Cloud
On-demand self serviceBroad network accessResource pooling (multi-tenant)Rapid elasticityMeasured service
Geographic distributionHomogeneityResilienceMassive scaleVirtualizationSecurity
No but VOs may be enabled on demand
No but standard opensourcesoftware and APIs may emerge(OpenStack is the current contender)
Yes
Grid
Cloud
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Grid versus Cloud Drivers
Cloud Commercially developed Little or no academic input Pay-per-use Payment driven Centrally owned hardware Centrally scheduled Single point of trust Simple security Interactive Commodity computing Small and medium businesses Virtualization essential Not so predictable performance
Grid DoD funded, no commercial traction Mainly academic driven Pay-per-seat (one-time payment) Project oriented, proposal driven Multiply owned hardware Distributed scheduling Multiple trust points Complex PKI based security Batch High performance computing High end organizations Virtualization often not used Predictable performance
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Cloud and Grid: Foster et al 2008
The triangle model of next-generation Internet Computing
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Berkeley View of Cloud: 2010
Not IaaS or PaaS but classes of utility computing
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Berkeley View of Cloud: 2010
AbstractionLevel
ApplicationSpecificity
AmazonEC2
MicrosoftAzure
GoogleAppEngine
SalesForceforce.com
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Berkeley View of Cloud: 2010
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Berkeley View of Cloud: 2010
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Cyber Security:What is Different in the Cloud?
Risk = f (Threats,
Vulnerabilities, Impact)
Threats
Vulnerabilities Impact
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Cyber Security:What is Different in the Cloud?
Securityand
Privacy
Multi-Tenancy
Compliance and Forensics Cloud Service Provider