Client/Server Systems

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A Client/Server is a distributed system whereby the application is divided into at least two parts:

1

one or more servers perform one part

2

the other part is performed by one or more clients.

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Modern programming languages provide constructs for building client/server-based distributed applications.

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These applications are divided into clients and servers, which are allocated to different computers in a network.

• A client sends a request to the server and waits for a response.
• At the other end, when the server receives a request, it processes it and sends the results back to the client.

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In a database system, several clients send queries to the server that has access to the database.

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The server executes the queries on behalf of the clients and sends each client its respective result.

• A multithreaded process is considered an efficient way to provide server applications.
• A server process can service a number of clients as shown in Fig. 7.2.

  Figure 7.2: A multithreaded server in a client server system.

  
• Each client request triggers the creation of a new thread in the server.