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Articles by Arnab Chakraborty
Page 5 of 377
Fair-share CPU scheduling
Fair-share CPU scheduling is a scheduling algorithm used in operating systems that aims to allocate CPU resources fairly among different user or process groups. Unlike traditional priority-based schedulers, fair-share scheduling assigns a weight to each process group based on its historical usage and allocates CPU time to ensure no group is starved of resources for extended periods. This scheduling approach is particularly valuable in multi-user systems and virtualized environments where multiple users or virtual machines share a single physical CPU. It provides better resource utilization and ensures equal opportunities for all groups to access CPU time. How Fair-Share ...
Read MoreDisk Management in Operating System
As a computer user, you might have noticed that your computer's hard drive can become cluttered and slow over time. This is where disk management comes into play. Disk management is a process used by your computer's operating system to manage the storage of your data on your hard drive. In this article, we will explore the different tasks involved in managing your hard drive, the tools available to help you manage your hard drive, and some tips to keep your hard drive running smoothly. Definition of Disk Management Disk management is the process of organizing and maintaining ...
Read MoreFeedback Structure of a Real-time System
A feedback structure in real-time systems is a systematic approach for continuously monitoring, analyzing, and improving system performance to meet time-critical requirements. It involves collecting input from various sources, processing that data, generating outputs, and using feedback loops to optimize system behavior. This structure enables real-time systems to adapt dynamically, maintain reliability, and ensure they meet stringent timing constraints while delivering consistent performance. Components of Feedback Structure Real-time System Feedback Structure Input ...
Read MoreFile Access Method
File access methods define how data is accessed and modified within a file. There are different file access methods, each with its own set of strengths and limitations. The four primary file access methods are sequential access, random access, direct access, and indexed access. Understanding the differences between each method is important for effective data management and choosing the right approach for specific applications. What is File Access Method A file access method is a way of accessing and manipulating data stored in a file. It determines how data is read from and written to computer storage devices. ...
Read MoreFile Allocation Table(FAT)
The File Allocation Table (FAT) is a file system used by operating systems to organize and manage files on storage devices. It maintains a table that maps each file to its physical location on the disk, tracking which clusters (groups of sectors) are allocated to files and which are available for use. Structure of FAT FAT consists of a sequence of entries, where each entry represents a cluster on the disk. A cluster is the smallest unit of disk space that can be allocated to a file. Each FAT entry contains information about the cluster's status and pointers ...
Read MoreFile Caching in Distributed File Systems
File caching is a technique that stores frequently accessed data in fast-access memory (cache) to reduce retrieval time from slower storage devices. In distributed file systems, where data spans multiple servers, file caching is essential for minimizing network latency and improving overall system performance by keeping copies of popular files closer to users. How File Caching Works When an application requests a file, the distributed file system first checks the local cache. If the file exists in cache (cache hit), it's returned immediately. If not (cache miss), the system retrieves the file from remote storage and stores a ...
Read MoreFile Model in Distributed Operating System
A distributed operating system manages resources across multiple networked computers. The file model in such systems defines how files are created, stored, accessed, and managed across the network. This involves complex considerations including file systems, data consistency, fault tolerance, and security. Understanding distributed file models is crucial for building scalable, reliable systems that can handle large amounts of data across multiple machines. Basic Concepts of File Model in Distributed Operating System File A file is a named collection of related data stored on storage devices such as hard drives, flash drives, or network storage. Files have characteristics ...
Read MoreFile Protection
File protection in an operating system is the process of securing files from unauthorized access, alteration, or deletion. It is critical for data security and ensures that sensitive information remains confidential and secure. Operating systems provide various mechanisms such as file permissions, encryption, access control lists, and auditing to protect files from both internal and external threats. What is File Protection? File protection refers to the various mechanisms and techniques used to secure files from unauthorized access, modification, or deletion. It involves controlling access to files, ensuring their security and confidentiality, and preventing data breaches. These protection mechanisms ...
Read MoreFile Sharing and Protection
File sharing is the practice of distributing or providing access to digital files between two or more users or devices. While it is a convenient way to share information and collaborate on projects, it also comes with risks such as malware and viruses, data breaches, legal consequences, and identity theft. Protecting files during sharing is essential to ensure confidentiality, integrity, and availability. File sharing refers to the process of sharing or distributing electronic files such as documents, music, videos, images, and software between two or more users or computers. It plays a vital role in facilitating collaboration and communication ...
Read MoreWhat is PID manager in Linux?
In Linux, when an executable stored on disk is called a program, and a program loaded into memory and running is called a process. A process is given a unique number called process ID (PID) that identifies that process to the system when it is started. If we ever need to kill a process, for example, we can refer to it by its PID. As each PID is unique, there is no ambiguity or risk of accidentally killing the wrong process (unless you enter the wrong PID). The PID manager is a kernel subsystem responsible for allocating, managing, and ...
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