DISTRIBUTED SYSTEMS Principles and Paradigms Second Edition ANDREW S. TANENBAUM MAARTEN VAN STEEN Chapter 2 ARCHITECTURES
DISTRIBUTED SYSTEMS Principles and Paradigms Second Edition ANDREW S. TANENBAUM MAARTEN VAN STEEN Chapter 2 ARCHITECTURES
Architectural Styles (1)
Important styles of architecture for distributed systems
Layered architectures
Object-based architectures
Data-centered architectures
Event-based architectures
Architectural Styles (2)
Figure 2-1. The (a) layered architectural style and …
Architectural Styles (3)
Figure 2-1. (b) The object-based architectural style.
Architectural Styles (4)
Figure 2-2. (a) The event-based architectural style and …
Architectural Styles (5)
Figure 2-2. (b) The shared data-space architectural style.
Centralized Architectures
Figure 2-3. General interaction between a client and a server.
Application Layering (1)
Recall previously mentioned layers of architectural style
The user-interface level
The processing level
The data level
Application Layering (2)
Figure 2-4. The simplified organization of an Internet search engine into three different layers.
Multitiered Architectures (1)
The simplest organization is to have only two types of machines:
A client machine containing only the programs implementing (part of) the user-interface level
A server machine containing the rest,
the programs implementing the processing and data level
Multitiered Architectures (2)
Figure 2-5. Alternative client-server organizations (a)–(e).
Multitiered Architectures (3)
Figure 2-6. An example of a server acting as client.
Structured Peer-to-Peer Architectures (1)
Figure 2-7. The mapping of data items onto nodes in Chord.
Structured Peer-to-Peer Architectures (2)
Figure 2-8. (a) The mapping of data items onto nodes in CAN.
Structured Peer-to-Peer Architectures (3)
Figure 2-8. (b) Splitting a region when a node joins.
Unstructured networks
Random Graphs
Partial views
Unstructured Peer-to-Peer Architectures (1)
Figure 2-9. (a) The steps taken by the active thread.
Unstructured Peer-to-Peer Architectures (2)
Figure 2-9. (b) The steps take by the passive thread
Topology Management of Overlay Networks (1)
Figure 2-10. A two-layered approach for constructing and maintaining specific overlay topologies using techniques from unstructured peer-to-peer systems.
Topology Management of Overlay Networks (2)
Figure 2-11. Generating a specific overlay network using a two-layered unstructured peer-to-peer system [adapted with permission from Jelasity and Babaoglu (2005)].
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