A distributed system is a collection of computational and storage devices connected through a communications network. In this type of system, data, software, and users are distributed.
Architectural Engineering - Brief Introduction and Case StudiesHitech CADD Services
Check out brief introduction and case studies for architectural engineering services. Hi-Tech CADD Services is a leader in outsourcing architectural engineering industry.
A distributed system is a collection of computational and storage devices connected through a communications network. In this type of system, data, software, and users are distributed.
Architectural Engineering - Brief Introduction and Case StudiesHitech CADD Services
Check out brief introduction and case studies for architectural engineering services. Hi-Tech CADD Services is a leader in outsourcing architectural engineering industry.
Architectural Patterns and Software Architectures: Client-Server, Multi-Tier,...Svetlin Nakov
Few days ago I gave a talk about software architectures. My goal was to explain as easy as possible the main ideas behind the most popular software architectures like the client-server model, the 3-tier and multi-tier layered models, the idea behind SOA architecture and cloud computing, and few widely used architectural patterns like MVC (Model-View-Controller), MVP (Model-View-Presenter), PAC (Presentation Abstraction Control), MVVM (Model-View-ViewModel). In my talk I explain that MVC, MVP and MVVM are not necessary bound to any particular architectural model like client-server, 3-tier of SOA. MVC, MVP and MVVM are architectural principles applicable when we need to separate the presentation (UI), the data model and the presentation logic.
Additionally I made an overview of the popular architectural principals IoC (Inversion of Control) and DI (Dependency Injection) and give examples how to build your own Inversion of Control (IoC) container.
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Software Architecture: Principles, Patterns and PracticesGanesh Samarthyam
Are you a developer or designer aspiring to become an architect? Do you want to learn about the architecture of open source applications? Do you want to learn software architecture through case studies and examples? If you have answered “yes” to any of these questions, this presentation is certainly for you. This presentation will introduce you to key topics in software architecture including architectural principles, constraints, non-functional requirements (NFRs), architectural styles and design patterns, viewpoints and perspectives, and architecture tools. A special feature of this workshop: it covers examples and case studies from open source applications. What’s more, you’ll also get exposed to some free or open source tools used by practicing software architects.
Contents overview:
* Introduction to SA
* Overview of design principles, patterns and architectural styles
* Realising quality requirements (NFRs)
* Case studies: Architecture of well-known open source applications
* Tools: Free or open source tools for software architects
* Must to read books on software architecture
(Presented in OSI Days workshop in Bangalore on 19th Nov 2015).
This presentation is about a lecture I gave within the "Software systems and services" immigration course at the Gran Sasso Science Institute, L'Aquila (Italy): http://cs.gssi.infn.it/.
http://www.ivanomalavolta.com
[2015/2016] Introduction to software architectureIvano Malavolta
This presentation is about a lecture I gave within the "Software systems and services" immigration course at the Gran Sasso Science Institute, L'Aquila (Italy): http://cs.gssi.infn.it/.
http://www.ivanomalavolta.com
Slides from Oracle's ADF Architecture TV series covering the Design phase of ADF projects, considering the different ADF architectural patterns.
Like to know more? Check out:
- Subscribe to the YouTube channel - http://bit.ly/adftvsub
- Design Playlist - http://www.youtube.com/playlist?list=PLJz3HAsCPVaSemIjFk4lfokNynzp5Euet
- Read the episode index on the ADF Architecture Square - http://bit.ly/adfarchsquare
A brief report on Client Server Model and Distributed Computing. Problems and Applications are also discussed and Client Server Model in Distributed Systems is also discussed.
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Nwe Embodiment (Naba Kalebara) of Lord Jagannath of PURI - The Greatest and B...assinha
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This presentation describes about UMTS major components Key features, NodeB, RNC, GGSN,MSC, SGSN,VLR,HLR, Charging function, UMTS base stations and info about UMTS number allocated for MS.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
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Introduction to AI for Nonprofits with Tapp NetworkTechSoup
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Odoo provides an option for creating a module by using a single line command. By using this command the user can make a whole structure of a module. It is very easy for a beginner to make a module. There is no need to make each file manually. This slide will show how to create a module using the scaffold method.
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Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...Dr. Vinod Kumar Kanvaria
Exploiting Artificial Intelligence for Empowering Researchers and Faculty,
International FDP on Fundamentals of Research in Social Sciences
at Integral University, Lucknow, 06.06.2024
By Dr. Vinod Kumar Kanvaria
it describes the bony anatomy including the femoral head , acetabulum, labrum . also discusses the capsule , ligaments . muscle that act on the hip joint and the range of motion are outlined. factors affecting hip joint stability and weight transmission through the joint are summarized.
2. Introduction
Architecture is the system design at the highest
level. All Architectural decisions are made at this
level. For Example decisions about technology to use,
product(s) to use, interfaces, number of modules,
behavior, relationships and interactions of the
modules, scalability and performance.
Changing the architectural decisions will have
significant ripple effects.
Architectural patterns can be an useful aid to
find most suitable architecture for the system.
3. Architectural Patterns
Architectural Patterns • Patterns provide a set of predefined
subsystems, specify their responsibilities and
relationships between them.
• Patterns are reusable and bring well defined
constraints
• Pattern alone or combined can provide
solution for creating architecture for a system
4. Architectural Patterns
Following common patterns will be described in the
subsequent slides.
• Pipe and Filter
• Layers
• Shared-data
• Client-Server
• Publish-subscribe
• Peer-to-peer
• Call and return
• Black Board
5. Pipe and Filter
This pattern can be used to divide system’s task to
different steps. These steps are connected by
dataflow within the system. Output data of one step
can be input data of another step. Each processing
step is implemented by a filter component. Each pipe
implements the data flow between adjacent
processing steps. Filters can be Asynchronous.
Example –
Input
Noise
Detection
(Filter)
Pipe
Noise
Verification
(Filter)
Pipe
Noise
Rectification
(Filter)
output
6. Layers
This pattern can be used for a system that requires
decomposition. System can be decomposed to various
hierarchical level of abstraction. Several operations are on the
same level of abstraction but are largely independent of each
other. Layers communicate between each other using APIs. Each
layer acts as a service provider to above layer.
Example – OSI 7-Layer Model
Each layer is independent of other.
Each lower layer acts as a service
provider to above layer.
Application
Presentation
Session
Transport
Network
Datalink
Physical
7. Shared Data
This pattern can be used for sharing data between components of a
system.
Components are define by two types – Data repositories and Data
accessors.
• Data repositories are permanent storage devices e.g. databases,
files where system stores data. They also take care of
synchronization issues due to concurrent access and provide access
support to data.
• Data accessor components can read and write modified data to it.
Shared data resource can be active agent or passive agent.
Active Agent – any modification to data is informed to all components
Passive Agent – components need to read the data (modified)
whenever they require.
Example – Database oriented systems
8. Client Server
This pattern can be used for communication between two
components Client and Server.
Client - It can only communicate with server and not with other
clients. it can only request to Server and receives reply.
Communication is initiated by a client which sends request and
server responds
Server – It receives the service request from client at a define
port, performs computation and returns the result back to Client
who requested for the service
Connector type is – request/reply, which is asymmetric
Often the client and the server reside on different machines
Example – Distributed systems
9. Peer to Peer
• Peers acts as either clients or servers.
• State and behavior are distributed among peers.
• Peers are independent components, having their own state
and control thread.
• They communicate among themselves using Network
protocols (protocol messages)
• Supports decentralized computing with flow of control and
resources distributed among peers.
• Components use services from each other through methods
• Highly robust in the face of failure of any given node.
• Scalable in terms of access to resources and computing
power.
10. Publish-Subscribe
This pattern can be used in systems where an only send messages to the applications that are
interested in receiving the messages without knowing the identities of the receivers.
The are three variation of the Publish-Subscribe pattern
• List-Based Publish/Subscribe Publish component will maintain a list of subscribers for a subject. When events occur for that subject,
each subscriber on the subscription list is notified.
All interested Subscribe components will register with Publish component for the subject
• Broadcast-Based Publish/Subscribe When an event occurs, Publisher creates a message and broadcasts it to the local area network (LAN).
All Subscriber matches the subject line to a subject that it subscribes to. If the subject does not match, it
ignores the message.
To identify subscribers topic, Publisher sends a broadcast message that asks Subscribers to reply if they
subscribe to a particular topic. Responses are then returned by Subscribers to the Publisher to identify
the Subscribers.
It is an effective method for decoupling producers from consumers.
• Content-Based Publish/Subscribe –
In this case subscriptions are related to specific information content.
Messages are intelligently routed to their final destination based on the content of the message. This
approach overcomes the limitation of a broadcast-based system, where distribution is coupled to a
multicast tree that is based on Transmission Control Protocol (TCP).
11. Call and Return
• Consumer components invoke functionality in Provider
components.
• Consumer components waits until an invoked service
completes and returns results before continuing
• components depend on invoked functionality to get their own
work done
• The correctness of each component may depend on the
correctness of the functionality it invokes
• Inter-process calls or Remote procedure calls in a distributed
set of processes or a network of computers
.
12. Blackboard
This pattern is useful for problems for which no deterministic solution
strategies are known.
Several specialized subsystems assemble their knowledge to build a possibly
partial or approximate solution.
System is divided into 1. Blackboard, 2. A collection of knowledge sources, 3.
Control Component
Blackboard - It is the central data store for solution space and control data. It
provides interface that enables all knowledge sources to read from and write
to it
Knowledge Sources - They are separate, independent subsystems that solve
specific aspects of the overall problem. A solution can only be built by
integrating the results of several knowledge sources
Control Components : It runs a loop to monitor the changes on the
blackboard. It will pick a knowledge source and decide what action to take
next according to a knowledge application strategy
Example - HEARSAY-I1 speech recognition system
13. Thank You
Your suggestions and comments are always welcome.
Please send me your feedback at
a_s_sinha@yahoo.com