Distributed Operating Systems




Distributed Operating Systems

Distributed Operating System is a recent advancement in the world of computer technology and are being widely accepted all-over the world and, that too, with a great pace.

It is a collection of various autonomous but interconnected computers which communicate with each other using a shared communication network.

All the systems are independent and possess their own memory unit and CPU. However, they all are connected via a single network. The greatest benefit of distributed systems is that it is always possible that one user can access the files or software which are not actually present on his system but on some other system connected within this network i.e., remote access is enabled within the devices connected in that network.

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Distributed Operating Systems

The most important thing here is that no user knows about the location or specifications of any files or programs and this is the reason why distributed systems are also known as loosely coupled systems.

All the systems are independent but act as one whenever required. So, it is something like being many but look like one.

Advantages:

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  1. Since all systems are independent, failure of any one will not affect the networking communication.
  2. Since resources are being shared, computation is highly fast and durable.
  3. Distributed systems are easily scalable as many systems can be easily added to the network.
  4. Data exchange process within the system in that network is very fast and reliable.

Disadvantages:

  1. Since entire communication relies on a single network; failure of this network will stop the entire communication.
  2. Language used to establish distributed systems are not well defined yet.
  3. This is an expensive and not readily available system. Moreover, the underlying software is highly complex and not understood well yet.

 

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Frequently Asked Questions

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Ans: Time Sharing Systems or multi-tasking systems are the major advancement in the batch processing systems. They are the one which support simultaneous execution of multiple tasks using a single processor. The time-sharing operating system assures that all the tasks get to access the CPU one by one and for a fixed small interval of time. This interval is known as the time quantum. view more..
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Ans: The main function of a batch processing system is to automatically keep executing the jobs in a batch. This is the important task of a batch processing system i.e. performed by the 'Batch Monitor' resided in the low end of main memory. This technique was possible due to the invention of hard-disk drives and card readers. Now the jobs could be stored on the disk to create the pool of jobs for its execution as a batch. view more..
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Ans: There are many types of operating systems that can be listed to study the types the operating systems. These types of operating systems are important as they explain us the evolution of the operating system with time. This evolution took place due to the customer’s demands and due to the enhancement in technology. There are 5 types of operating System- Batch Operating Systems, Time Sharing Systems, Distributed Operating Systems, Network Operating Systems, Real Time Operating Systems view more..
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Ans: Distributed Operating System is a recent advancement in the world of computer technology and are being widely accepted all-over the world and, that too, with a great pace view more..
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Ans: Network Operating System is a collection of various computers which are all connected to a single host computer. It can be compared to a client – server architecture where the host computer acts as a server and rest of the systems act as clients which take services from the common server and access its resources also. view more..
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Ans: Real time operating System (RTOS) is an operating system that serves the real-time systems. Before understanding the term “Real Time Operating System” we need to understand the two terms it comprises of i.e., Real Time Systems and Operating System. view more..
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Ans: We can broadly classify these services into following five categories: Process management Device management Inter-process Communication File management Error detection view more..
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Ans: there are 4 types of architectures of operating system: 1. Monolithic architecture 2. Layered architecture 3. Microkernel architecture 4. Hybrid architecture view more..
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Ans: It is the oldest architecture of the operating system. We know that all the core software components of the operating system are collectively known as the kernel. view more..
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Ans: This is an important architecture of operating system which is meant to overcome the disadvantages of early monolithic systems. view more..
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Ans: The basic ideology in this architecture is to keep the kernel as small as possible. We know that kernel is the core part of the operating system and hence it should be meant for handling the most important services only. view more..
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Ans: the idea was to combine the best functionalities of all old approaches and hence this design is termed as the hybrid structured operating system. view more..
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Ans: System Calls and Programs All the present-day operating systems support the following two modes of operation for the CPU: User mode Kernel mode view more..
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Ans: A batch system executes jobs, whereas a time-shared system has user programs, or tasks. Even on a single-user system such as Microsoft Windows, a user may be able to run several programs at one time: a word processor, a web browser, and an e-mail package. Even if the user can execute only one program at a time, the operating system may need to suppoft its own internal programmed activities, such as memory management. view more..
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Ans: Multiprocessing is the use of two or more central processing units (CPUs) within a single computer system. The term also refers to the ability of a system to support more than one processor or the ability to allocate tasks between them. view more..
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Ans: Process scheduling selects processes from the queue and loads them into memory for execution. Process loads into the memory for CPU scheduling. The primary objective of the job scheduler is to provide a balanced mix of jobs, such as I/O bound and processor bound. ... Time-sharing operating systems have no long term scheduler. view more..
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Ans: Inter process communication (IPC) is a mechanism which allows processes to communicate each other and synchronize their actions. The communication between these processes can be seen as a method of co-operation between them. Processes can communicate with each other using these two ways: Shared Memory. Message passing. view more..
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Ans: Direct memory access (DMA) is a method that allows an input/output (I/O) device to send or receive data directly to or from the main memory, bypassing the CPU to speed up memory operations. The process is managed by a chip known as a DMA controller (DMAC) view more..




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