Distr.syst.dhbw at Duale Hochschule Baden-Württemberg

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Exemplary flashcards for Distr.syst.dhbw at the Duale Hochschule Baden-Württemberg on StudySmarter:

What is middleware?

Exemplary flashcards for Distr.syst.dhbw at the Duale Hochschule Baden-Württemberg on StudySmarter:

What are design goals for distributed systems?

Exemplary flashcards for Distr.syst.dhbw at the Duale Hochschule Baden-Württemberg on StudySmarter:

What are types of distribution transparency?
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Exemplary flashcards for Distr.syst.dhbw at the Duale Hochschule Baden-Württemberg on StudySmarter:

What is openness for distributed systems?

Exemplary flashcards for Distr.syst.dhbw at the Duale Hochschule Baden-Württemberg on StudySmarter:

What is "separating policy from mechanism"?

Exemplary flashcards for Distr.syst.dhbw at the Duale Hochschule Baden-Württemberg on StudySmarter:

What are types of scalability?

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What are some false design principles?
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Exemplary flashcards for Distr.syst.dhbw at the Duale Hochschule Baden-Württemberg on StudySmarter:

What is cluster computing?

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What is grid computing?

Exemplary flashcards for Distr.syst.dhbw at the Duale Hochschule Baden-Württemberg on StudySmarter:

What are the layers in grid architecture?

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What are the three main cloud computing services offered?    
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What are some cloud computing issues?

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Exemplary flashcards for Distr.syst.dhbw at the Duale Hochschule Baden-Württemberg on StudySmarter:

Distr.syst.dhbw

What is middleware?
Separate level of software logically placed on top of the respective operating systems of the computers

Distr.syst.dhbw

What are design goals for distributed systems?
  • Sharing of resources
  • Distribution transparency
  • Openness
  • Scalability

Distr.syst.dhbw

What are types of distribution transparency?
  • Access
Hiding differences in data representations
  • Location
Hiding exact location of the object
  • Relocation
Hiding the fact that some objects have to be moved during the usage
  • Migration
Hiding the change of the location for an object
  • Replication
Hiding that an object may be on many different locations
  • Conncurency
Hiding that an object is used by many users
  • Failure
Hiding that failure and recovery happened 

Distr.syst.dhbw

What is openness for distributed systems?
Offering components that can be used by, or integrated into other systems

Distr.syst.dhbw

What is "separating policy from mechanism"?
System should be organized as a collection of relatively small and easily replaceable or adaptable components

Distr.syst.dhbw

What are types of scalability?
  • Size scalability
  • Geographical scalability
  • Administrative scalability
  • Counterexample - peer-to-peer applicaions

Distr.syst.dhbw

What are some false design principles?
  • The network is reliable
  • The network is secure
  • The network is homogeneous
  • The topology does not change
  • Latency is zero
  • Bandwidth is infinite
  • Transport cost is zero
  • There is one administrator

Distr.syst.dhbw

What is cluster computing?
  • Cluster is a set of computers which work together and can be viewed as a single system
  • hardware consists mostly of a collection of similar stations (compute nodes are mostly identical) and the management is centralized

Distr.syst.dhbw

What is grid computing?
  • federation of different computer systems
  • computers more heterogeneous and more physiclly dispersed than cluster computers
  • Frequently :
    • different administrative domains
    • different hardware
    • different software
    • different deployed network topology

Distr.syst.dhbw

What are the layers in grid architecture?
  1. Fabric layer
  2. Connectivity layer
  3. Resource layer
  4. Collective layer
  5. Application layer(highest level)

Distr.syst.dhbw

What are the three main cloud computing services offered?    
  • Infrastructure-as-a-Service (IaaS)
  • covering hardware and infrastructure layer
  • deploys virtualisation techniques to provide customers an infrastructure consisting of virtual storage and computing resources
  • Platform-as-a-Service (PaaS)
  • covering the platform layer
  • providing vendor-specific API to a cloud computing user such as operating system do in the case of application developers
  • example higher-level abstraction of storage in Amazon S3
  • Software-as-a-Service (Saas)
  • covering application layer
  • spreadsheet applications, presentation applications, etc..

Distr.syst.dhbw

What are some cloud computing issues?
  • Security and privacy issues
  • Different performance profiles
  • Provider lock-in - being dependant on provider's products and services, switch to another provider requires substantial costs
  • Dependency on the network infrastructure
  • Is it cost effective?

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Systematik

Systematik

Systematik

Multi Channel Distribution Systems

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