Cours - Systèmes d'exploitation et cloud
66 documents à télécharger gratuitement
Cours de systèmes d'exploitation et cloud partagés par des étudiants et des enseignants. Thèmes couverts : Linux, Unix, Windows Server, Docker, Kubernetes, virtualisation.
This document provides an in-depth discussion of scheduling problems in single-machine environments. It introduces the objective of optimizing specific criteria (e.g., makespan minimization) under given constraints. Mathematical models and theorems like FIFO, SPT, and EDD are utilized to achieve optimal scheduling. Additionally, the document explores computational solutions using tools like CPLEX and Lekin, as well as NP-hard scenario analysis supported by heuristic approaches.
The document introduces multi-machine scheduling problems aiming to optimize chosen criteria while respecting constraints. It elaborates on parallel machine scenarios and discusses flow shop and job shop setups, detailing rules and algorithms for optimal task sequencing and allocation, including LPT, SPT, Johnson's algorithm, and heuristics like CDS. Examples illustrate these methodologies, highlighting their application and outcomes, with software tools like Lekin and Cplex mentioned for resolution practices.
The document introduces scheduling problems for single-resource systems, aiming to optimize criteria like makespan and tardiness while respecting constraints. Methodologies include modeling and solving with tools like Lekin and CPLEX, focusing on NP-hard cases. Common scheduling problems analyzed range from minimizing processing times to handling precedence constraints. Optimization theories and heuristics, such as EDD and MDD, are discussed with examples.
This document comprehensively introduces scheduling problems in various contexts, including production systems, projects, and administration. It elaborates on classification schemas, key parameters, and methodologies to optimize resource allocation while balancing constraints such as precedence and resource availability. Practical examples in fields such as aeronautics, IT, and construction are covered alongside an exploration of decision-making processes across strategic, tactical, and operational levels. Core scheduling typologies like single-machine, flow shop, and job shop are explained...
This document details the application of Lean Six Sigma methodologies to improve production processes within Electronic Manufacturing Services (EMS). Core methods include Value Stream Mapping, statistical analysis, and the DMAIC workflow (Define, Measure, Analyze, Improve, Control). Key findings include the identification of inefficiencies via non-conformity analysis and process redesign, resulting in enhanced productivity and quality metrics. Implemented improvements directly impacted the satisfactory achievement of defined project objectives.
This document provides a detailed overview of Kubernetes, a powerful open-source container orchestration platform. It covers the essential features such as resource scheduling, self-healing, service discovery, and scalability. Methodologies include the usage of API-driven declarative configurations, YAML manifests for object specifications, and diverse worker/control plane architectures. Extensions and integrations for storage, monitoring, and automation emphasize its flexibility and utility in modern cloud environments.
This document provides an in-depth exposition of the GNU/Linux file management system. It elaborates on the structure and types of files, such as regular, directories, special files, symbolic links, and interprocess communication objects like pipes and sockets. Key aspects covered include the file metadata stored in inodes, file permissions and access control using chmod and umask, and the distinct hierarchical file system structure adhering to FHS standards. It also explores task scheduling mechanisms like cron and at, emphasizing system administration utilities and best practices for user...
This document provides an overview of virtualization and cloud computing principles. It covers different types of virtualization and practical workshops. The document also includes historical context and product comparisons related to virtualization technologies.
This document provides an in-depth overview of fault tolerance in distributed systems. It defines essential concepts such as reliability, availability, and safety, while elaborating on different types of faults and failure modes. The methodology includes fault prevention, tolerance, detection, localization, and recovery methods using redundancy, error masking, and error correction techniques. The findings underscore the importance of implementing robust error handling mechanisms to ensure system reliability and functionality under adverse conditions.
This course prepares participants for the AWS Certified Cloud Practitioner exam (CLF-C01). It encompasses both theoretical knowledge and hands-on learning, covering over 40 AWS services. The course is suitable for AWS/IT beginners and aims to ensure participants are well-prepared for the exam.
This document explores the management of processes in Unix/Linux operating systems, starting with an introduction to system calls and the POSIX standards. It details the structure and management of processes, covering concepts such as process creation using `fork()`, process control using system calls like `exec` and `wait`, and communication through shared resources. It also analyzes process termination, signaling mechanisms, and the use of the standard C library for executing commands. Examples and exercises are provided for hands-on understanding.
This course covers the fundamentals of operating systems with a focus on Linux. Students will learn shell scripting, text manipulation, and command line operations. The course includes theoretical knowledge and practical sessions.
Ce document introduit les concepts fondamentaux des systèmes d'exploitation (OS), définissant leurs rôles entre le matériel et l'utilisateur. Il couvre les différents types de systèmes d'exploitation en fonction des équipements, ainsi que les interactions entre le matériel, les applicatifs et les utilisateurs. De plus, il aborde l'importance de l'optimisation des ressources et la loi de Moore dans le développement des OS.
ISTIC 2018-2019 Communication entre processus par tubes anonymes Amira BELHEDI belhedi. amira@yahoo. fr R f rence livre Programmation syst me en C sous Linux Signaux, processus, threads, IPC et sockets Communication par les tubes (pipes) Tube de communication: canal ou tuyau (en anglais pipe) dans lequel un processus peut crire des donn es (producteur, crivain ou r dacteur) et un autre processus peut les lire (consommateur).
This document focuses on fault tolerance within distributed systems. It introduces basic definitions and concepts such as reliability, availability, and safety, and classifies different types of system failures (e.g., omission, timing, Byzantine). It emphasizes fault tolerance techniques including detection, localization, isolation, and repair, as well as recovery methods like backward and forward recovery. Statistical models like Mean Time To Failure (MTTF) and Mean Time To Repair (MTTR) are highlighted to measure reliability and availability.
This document covers the principles of virtualization and its various forms, including application, network, and storage virtualization. It highlights the importance of virtualization in cloud computing and provides practical workshops for hands-on experience. Additionally, it examines the advantages and disadvantages of virtualization techniques.
This document focuses on software process methodologies applicable to small and large projects. It outlines the software lifecycle, including definition, development, verification, and maintenance. It emphasizes the importance of foundational understanding in avoiding myths and mismanagement, introducing multiple process models like Waterfall, Agile, and reuse-oriented models. Through examples such as the V-model and comparative analysis, it underscores the importance of adaptability to client needs and rigorous quality management.
This document explores software processes, including their definitions, life cycle activities, and project management techniques. It discusses the myths and realities of software engineering, emphasizing the importance of clear software requirements and maintenance in the development cycle. Various software development models are presented, such as the waterfall model, V-model, and agile methodologies, highlighting their advantages and disadvantages. The material underscores quality assurance, validation, verification, and the role of maintenance and configuration management throughout a so...
Ce mémoire explore l'application de la méthode Six Sigma pour l'amélioration des processus organisationnels. Il aborde le contexte, les enjeux, et les méthodes employées, tout en présentant les résultats obtenus. Enfin, une conclusion et une bibliographie exhaustive sont fournies.
Ce document traite des principes fondamentaux de l'ordonnancement des processus dans les systèmes d'exploitation. Il aborde les définitions, motivations et défis liés à l'efficacité de l'utilisation du processeur. Il explore également les interruptions et les différentes catégories d'algorithmes d'ordonnancement.
Ce document aborde la synchronisation et la communication entre processus dans les systèmes d'exploitation. Il explique les concepts de concurrence, compétition et coopération entre processus, ainsi que les mécanismes de synchronisation nécessaires pour gérer les conflits d'accès aux ressources partagées. Des exemples tels que le spool d'impression illustrent les méthodes de communication inter-processus.
Ce document explique les concepts de processus et de threads dans le cadre des systèmes d'exploitation. Il décrit la structure d'un processus, les différences avec un programme, et présente l'appel système fork() pour créer des processus. Des exemples illustrent la création et la gestion des processus, ainsi que leur terminaison.
This course provides an introduction to operating systems, discussing their definitions, functionalities, and the various types of hardware they manage. It emphasizes the importance of the OS in both single-user and multi-user environments and outlines the optimization goals for usability and resource sharing. The course also touches on historical figures and concepts related to the evolution of operating systems.
This document presents the Stream Editor (SED), an important tool for manipulating text files in Unix systems. It discusses the relevance of using SED and AWK in modern computing environments and explains the principles of how SED operates and its commands. Additionally, the document highlights the evolution of documentation formats and the critical role these tools play for system administrators.