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Modeling and Analysis of State-of-the-art VM-based Cloud Management Platforms Saif U. K. Malik, Samee U. Khan, Senior Member, IEEE, Surdarshan K. Srinivansan, Member, IEEE IEEE TRANSACTIONS ON CLOUD COMPUTING (2013) 報告者 : 計財 15 100071018 韋自鴻 計財 15 100071020 楊佑濬 1
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Introduction 2
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What is Cloud Computing? 3
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Cloud Computing structure 4 Application Social Computing, Enterprise, ISV, … Programming language Web 2.0 介面, Mashups, Workflows, … Control Qos Neqotiation, Ddmission Control, Pricing, SLA Management, Metering … Virtualization VM, VM management and Deployment User Level User-Level Middleware Core Middleware System Level
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現有的雲端運算服務 Windows Google Amazon Yahoo ...... 5
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Type of Cloud Computing Industry 6
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Features of cloud computing 7 Large scale Virtualization High reliability High versatility High Scalability pay-as-you-go Low Cost
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Cloud Computing Industry 8 Infrastructure as a Service Delivers computer infrastructure such as virtualization, storage, and networking that offers incremental scalability. infrastructure stack: Full OS access Firewalls Routers Load balancing IaaS
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Cloud Computing Industry 9 Examples Flexiscale AWS: EC2 (Amazon Elastic Compute Cloud) IaaS
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Cloud Computing Industry 10 Platform as a Service Provide a platform for system administrators and developers to build, test and deploy custom applications Expensive cost management system Popular services Storage Database Scalability IaaS PaaS
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Cloud Computing Industry 11 Examples Google App Engine AWS: S3 (Simple Storage Service) Microsoft Azure IaaS PaaS
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Cloud Computing Industry 12 Software as a Service Do not manage hardware and software Simple operation (browser) Pay per use Instant Scalability Security Reliability IaaS PaaS SaaS
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Cloud Computing Industry 13 Examples Google Docs CRM Financial Planning Human Resources Word processing Salesforce.com IaaS PaaS SaaS
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Comparison table 14 Service Property Amazon EC2 Google App Engine Microsoft Azure Yahoo Hadoop 架構 Iaas/PaasPaas Software 服務型態 Compute/ Storage Web application Web and non- web Software 管理技術 OS on Xen hypervisor Application container OS through Fabric controller Map / Reduce Architecture 使用者介面 EC2 Command-line tools Web-based Administration console Windows Azure portal Command line and web APIsyes 收費 yesmaybeyesno 程式語言 AMI (Amazon Machine Image) Python.NET framework Java,
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Open Source IaaS the most widely used open source hypervisors in the recent IaaS providers: (a) Xen (b) KVM three open source state-of-the-art VM-based cloud management platforms : (a) Eucalyptus (b) Open Nebula (c) Nimbus 15
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Eucalyptus The less level of customization that makes it appropriate for a private company, where one needs a cloud for own use and wants to avoid mistakes from the users. The best feature is compatible with Amazon EC2. 16
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Open Nebula the highest level of customizability that allow users to switch almost every component from the underlying Virtual Machine Monitor (VMM) to the frontend. Open Nebula is suitable in an experimental environment, where one wants to explore every component and crack new results from the computational perspective. 17
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Nimbus Nimbus also provides a high level of customization. However, the major portion of customization in Nimbus is available to the administrator. Nimbus is more suitable for an environment, where one is less interested in technical details of the systems, but requires a broad level of customization, such as cooperative scientific communities. 18
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Modeling and Analysis of the systems In this study, we made an effort to diminish the level of abstraction through detailed modeling and formal analysis of the platforms being discussed. We have used High Level Petri Nets (HLPN) and Z language for the modeling and analysis of the systems. 19
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High Level Petri Nets (HLPN) HLPN is used to: (a) simulate the systems and (b) provide mathematical representation, to analyze the behavior and structural properties of the system. The model of the systems will help analyze: (1) the interconnection of the components and processes. (2) the fine-grain details of the flow of information amongst the processes. (3) how the information is processed. 20
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Z3 solver First, we performed the automated verification of the models by Checking technique using Satisfiability Modulo Theories Library (SMTLib) and Z3 solver. Then, Z3 solver is used to check either the model satisfies the properties or not. Second, to verify the feasibility of the models as the number of VMs scales and verify the correctness. The results generated reveals that the models are working correctly. 21
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Modeling and Analysis of VM-based Cloud Management Platforms 22
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Eucalyptus Architecture 23
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HLPN of Eucalyptus 24
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Conclusion for Eucalyptus Supports corporate enterprise computing setting The administration space is separated from the user space. Easy to deploy on top of the existing resource. Suitable for experimentation because of having modular design open source in nature. Users are only allowed to use the system through web interface 25
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Open Nebula Architecture 26
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HLPN of Open Nebula 27
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Conclusion for Open Nebula The level of customization available of Open Nebula is suitable for researchers who wish to combine cloud system with other technologies. The centralized nature makes administration easier Higher level of customization makes it ideal for research Users need to have some technical expertise Users can make a mistake while providing config for a VM 28
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Nimbus Architecture 29
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HLPN of Nimbus 30
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Conclusion for Nimbus Provides different resources leases to different users as a mean of scheduling The flexibility and customization available to perform experiment Workspace tools can operate with Xen hypervisor and as well as KVM. 31
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Verification of Models Using SMT-Lib and Z3 Solver 32
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Kripke structure and Computational Tree 33
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CONCLUSIONS AND FUTURE WORK 39
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CONCLUSIONS AND FUTURE WORK In future, we will analyze, model, and verify some other cloud management platforms, such as OpenStack, oVirt, and ECP. Moreover, we will also perform a detailed feasibility analysis of the aforesaid platforms under different SLA constraints. 40
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