Distributed File System

Duration: 5 min

This video lesson is available to enrolled students.

Return to /learn/ISRO/operating-system/distributed-systems/distributed-system-basics/asset-distributed-file-system after enrolling

Inside: a video lesson and guided study material.

Module outline

  1. About Course: About the Course
  2. General Aptitude & Reasoning: Number System, Percentage, Ratio and Proportion (Ratios), Average, Profit and Loss, Simple Interest and Compound Interest, Time and Work, Speed Time and Distance, Mixture and Alligation, Data Interpretation, Algebra, Probability, Permutation and Combination, Venn Diagram, HCF LCM, Divisibility Rules, Age Problems, Pipe and Cistern, Partnership, Linear Algebra, Sequence and Series (Series), Statistics, Powers and Exponents (Surds and Indices), Arithmetic, Mensuration and Geometry, Calculus, Trigonometry, Vectors, Speed Mathematics and Basic Mathematics, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Analogy, Series (Number and Letter Series) (Numerical Relations and Reasoning), Puzzle Solving (Puzzles), Syllogisms, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Calendar, Seating Arrangements, Coding Decoding, Blood Relations, Directions (Direction Test), Clock, Analytical Reasoning (Counting Figures Reasoning), Ranking, Order and Sequence, Logical Sequence Of Words, Inequality, Data Sufficiency, Cubes & Dices
  3. Computer Networks & Cybersecurity: Introduction to CN, Data Communication, DLL: Access Control, DLL: Flow Control, DLL: Error Control, DLL: Framing, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Net Layer:Routing Protocol, Transport Layer Services, TL: Congestion & UDP, Application Layer, Hardware Basics, Network Security
  4. Programming, Data Structures & Algorithms: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling, OOPS with C++, Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Greedy Algorithms, Dynamic Programming, Minimum Spanning Trees, Shortest Path Algos, Advanced Algorithms
  5. AI, Machine Learning, Big Data & Cloud: Emerging Tech Trends, Artificial Intelligence, Big Data Systems, Approaches to AI, Search Algorithms, Knowledge Representation, Cloud Computing
  6. Digital Logic & Computer Organization: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Number System, Number Representation, Basics of COA, Floating Point Rep, Cache Memory Organization, Input Output Organisation, Pipelining, Instr Formats & Modes, Register Transfer and Microoperations, Control Unit Design, Programming the Basic Computer
  7. TOC & Compiler: Introduction to TOC, Deterministic FA (DFA), Non-Deterministic FA, Regular Expressions, Grammar, Regular Language Properties, Moore & Mealy Machines, Pushdown Automata & CFG, Turing Machines, Complexity Theory, Intro to Compilers, Lexical Analysis, Grammar & CFG, Syntax Analysis: Top-Down, Syntax Analysis: Bottom-Up, Semantic Analysis & SDT, Intermediate Code Gen, Code Optimization, Run Time Environment
  8. Discrete Mathematics: Set Theory, Relations, Functions, Graph Theory, Group Theory, Propositional and Predicate Logic
  9. Operating System: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Threads & Process Creation, Deadlock, Memory Management, Virtual Memory, Disc Scheduling, File Management, Unix OS, Linux OS, Distributed Systems
  10. Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management, Object Oriented Technology, HTML Basics, JavaScript-Basics, Java, XML
  11. Database Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, File Organization & Indexing, Relational Algebra, SQL, Relational Calculus, Transaction Management, Concurrency Control, Database Recovery, Data Warehousing & Mining, Enhanced Data Models, NoSQL
  12. Other Recurring CS Topics: Basics of Computer Graphics, 2-D Geometrical Transforms and Viewing, Multimedia
  13. Live Classes: ISRO Live classes
  14. Full Mock Test:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This lecture introduces the concept of a Distributed File System (DFS), focusing on its definition, core features, and the principle of location transparency. The instructor uses a single slide throughout the clip to explain how users can access files stored on different computers through a common file-system interface. The presentation emphasizes that physical file locations can be hidden from users, allowing remote files to be accessed as if they were local. A recurring diagram illustrates the architecture: a User/Client connects to a DFS Interface, which then links to multiple servers (Server 1, Server 2, and Server 3). The instructor uses a specific example, Student.pdf, to demonstrate how the system maps a single file name to different physical storage locations without requiring user knowledge of where the file is actually stored. The lesson remains focused on these foundational concepts, with no transition to advanced topics or additional slides.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor introduces the Distributed File System (DFS) and its primary purpose: allowing users to access files stored on different computers through a common file-system interface. The slide displays a list of features, including that files can be stored on different computers and that users can access remote files like local ones. The instructor highlights the concept of location transparency, explaining that the physical location of a file can be hidden from users. A diagram is shown with a User/Client at the top, connected to a DFS Interface, which branches out to Server 1, Server 2, and Server 3. The instructor points to the DFS Interface in the diagram and uses a pink marker to highlight Server 2 and Server 3, emphasizing how the system manages multiple storage locations.

  2. 2:00 – 4:43 02:00-04:43

    The lecture continues to focus on the same DFS slide, with the instructor elaborating on location transparency using the example of Student.pdf. The diagram shows an 'Access: Student.pdf' flow from the User/Client, branching to each server where the file is labeled 'Student.pdf'. The instructor gestures towards the text explaining that users access files by name without needing to know their physical storage location. The presenter, wearing a white shirt and headset, alternates between facing the camera and pointing at the right-hand diagram. The Features panel remains visible on the slide, listing green-check bullets such as 'Files can be stored on different computers' and 'It provides distributed storage'. The instructor uses a stylus to point at specific parts of the diagram, including pink underlines and circled numbers, reinforcing how a single file name maps to multiple servers.

The central idea of this lecture is that a Distributed File System provides a unified interface for accessing files across multiple computers, abstracting away the complexity of physical storage locations. The key concept taught is location transparency, where users interact with files by name (e.g., Student.pdf) without needing to know which server stores them. The architecture is consistently illustrated through a diagram showing the User/Client, DFS Interface, and multiple servers. The instructor's use of visual aids, such as pink markers and specific examples, helps clarify how the DFS hides physical locations while supporting file sharing and distributed storage. The lesson remains focused on these foundational definitions and features, with no evidence of progression to more complex topics or additional examples beyond the Student.pdf scenario.

Loading lesson…