History of operating systems
... These operations require in general a functional OS on both platforms involved. In general, it can be said that videogame consoles and arcade coin operated machines used at most a built-in BIOS during the 1970s, 1980s and most of the 1990s, while from the PlayStation era and beyond they started gett ...
... These operations require in general a functional OS on both platforms involved. In general, it can be said that videogame consoles and arcade coin operated machines used at most a built-in BIOS during the 1970s, 1980s and most of the 1990s, while from the PlayStation era and beyond they started gett ...
Self-Organizing Subsets: From Each According to His Abilities, To
... Peer-to-peer principles are fundamental to the concept of survivable, massive-scale Internet services incorporating large numbers—potentially billions— of heterogeneous hosts. Most recent peer-to-peer research systems distribute service functions (such as storage or indexing) evenly across all parti ...
... Peer-to-peer principles are fundamental to the concept of survivable, massive-scale Internet services incorporating large numbers—potentially billions— of heterogeneous hosts. Most recent peer-to-peer research systems distribute service functions (such as storage or indexing) evenly across all parti ...
L13_PeerToPeerV1.2
... Design must insure each user contributes resources to the system All nodes need the same functional capabilities and responsibilities Correct operation does not depend on the existence of any centrally administered system The system offers a degree of anonymity Workload must be balanced and ava ...
... Design must insure each user contributes resources to the system All nodes need the same functional capabilities and responsibilities Correct operation does not depend on the existence of any centrally administered system The system offers a degree of anonymity Workload must be balanced and ava ...
Introduction
... • In UNIX the mounted file system is used to deal with removable media (mount). • Two kinds of special files exist in UNIX under the /dev directory: block special files (disks) and character special files (printers, modems). • A pipe is a sort of pseudo file that can be used to connect two processes ...
... • In UNIX the mounted file system is used to deal with removable media (mount). • Two kinds of special files exist in UNIX under the /dev directory: block special files (disks) and character special files (printers, modems). • A pipe is a sort of pseudo file that can be used to connect two processes ...
lecture 1 - Course Website Directory
... – Failure recovery (check-point and rollback recovery) – Redundancy (multi-path routing, replicated database, replicated DNS) ...
... – Failure recovery (check-point and rollback recovery) – Redundancy (multi-path routing, replicated database, replicated DNS) ...
The Architecture of a Reliable Operating System,
... caused by bugs in such code. However, our system explores an extreme in the design space of UNIX-like operating systems where the entire operating system is run as a collection of independent, tightly restricted, user-mode processes. This structure, combined with several explicit mechanisms for tran ...
... caused by bugs in such code. However, our system explores an extreme in the design space of UNIX-like operating systems where the entire operating system is run as a collection of independent, tightly restricted, user-mode processes. This structure, combined with several explicit mechanisms for tran ...
PPT - Duke Database Devils
... Similarly, each thread has a separate stack. The OS switches between threads at its whim. One thread is active per CPU core at any given time. ...
... Similarly, each thread has a separate stack. The OS switches between threads at its whim. One thread is active per CPU core at any given time. ...
Revision Lecture Distributed Computing systems
... What is Distributed Computin Systems • Distributed system is one in which components located at networked computers communicated and coordinate their actions only by passing message –G. Coulouris • A collection of independent computers that appears to its users as a single coherent system. - S. Tan ...
... What is Distributed Computin Systems • Distributed system is one in which components located at networked computers communicated and coordinate their actions only by passing message –G. Coulouris • A collection of independent computers that appears to its users as a single coherent system. - S. Tan ...
ppt - NUS School of Computing
... STB user and the service provider. • Cable operators approach for DVN. – Need to extend unidirectional coaxial networking with a communication path from subscriber home to cable service gateways that can control the content being sent to subscriber. ...
... STB user and the service provider. • Cable operators approach for DVN. – Need to extend unidirectional coaxial networking with a communication path from subscriber home to cable service gateways that can control the content being sent to subscriber. ...
ch1_OS
... Symmetric multiprocessing (SMP) Each processor runs an identical copy of the operating system. Many processes can run at once without performance deterioration. Most modern operating systems support SMP Asymmetric multiprocessing Each processor is assigned a specific task; master process ...
... Symmetric multiprocessing (SMP) Each processor runs an identical copy of the operating system. Many processes can run at once without performance deterioration. Most modern operating systems support SMP Asymmetric multiprocessing Each processor is assigned a specific task; master process ...
Example Sheet for Operating Systems I (Part IA)
... (b) A context switch can be implemented by a flip-flop stored in the translation lookaside buffer (TLB). (c) Non-blocking I/O is possible even when using a block device. (d) Shortest job first (SJF) is an optimal scheduling algorithm. (e) Round-robin scheduling can suffer from the so-called ‘convoy eff ...
... (b) A context switch can be implemented by a flip-flop stored in the translation lookaside buffer (TLB). (c) Non-blocking I/O is possible even when using a block device. (d) Shortest job first (SJF) is an optimal scheduling algorithm. (e) Round-robin scheduling can suffer from the so-called ‘convoy eff ...
ch16distributed_systems
... Users are aware of multiplicity of machines. Access to resources of various machines is done explicitly by: Remote logging into the appropriate remote ...
... Users are aware of multiplicity of machines. Access to resources of various machines is done explicitly by: Remote logging into the appropriate remote ...
Sensor Networks
... Global addresses require long addresses to address individual nodes – Amount of data communicated is small, but addressing overhead is high – Power limitations impose local communication (but, sensing task is distributed) – Locally unique identifiers require far fewer bits => Address Scalability ...
... Global addresses require long addresses to address individual nodes – Amount of data communicated is small, but addressing overhead is high – Power limitations impose local communication (but, sensing task is distributed) – Locally unique identifiers require far fewer bits => Address Scalability ...
Nodes` Credit based Directed Diffusion for wireless sensor
... Unlike location centric algorithm each sensor node in Directed Diffusion needs not to know its position information, all its decisions about data transmission are based on its knowledge about the neighbor nodes. The main reason of limitations mentioned, is that this knowledge of nodes about their ne ...
... Unlike location centric algorithm each sensor node in Directed Diffusion needs not to know its position information, all its decisions about data transmission are based on its knowledge about the neighbor nodes. The main reason of limitations mentioned, is that this knowledge of nodes about their ne ...
Kernel designs explained
... type in the world of personal computers 2 today. What is a kernel? Every operating system has a kernel. The task of an operating system’s kernel is to take care of the most basic of tasks a computer operating system must perform: assign hardware resources to software applications in order for them t ...
... type in the world of personal computers 2 today. What is a kernel? Every operating system has a kernel. The task of an operating system’s kernel is to take care of the most basic of tasks a computer operating system must perform: assign hardware resources to software applications in order for them t ...
Chapter 12
... point-to-point configuration to a central hub • Hub can route messages from one node to another or a subset of nodes ...
... point-to-point configuration to a central hub • Hub can route messages from one node to another or a subset of nodes ...
Are Virtual Machine Monitors Microkernels Done Right? Evangelos Kotsovinos, Dan Magenheimer
... While the resulting kernel is smaller, this functional reduction relaxes the dependability boundaries within the system: applications must depend on other user-level components in order to run. More importantly, the microkernel itself depends on application level components, such as pagers, to make ...
... While the resulting kernel is smaller, this functional reduction relaxes the dependability boundaries within the system: applications must depend on other user-level components in order to run. More importantly, the microkernel itself depends on application level components, such as pagers, to make ...
What is an Operating System?
... Or by a request from a user program for operating system service System call Other process problems include infinite loop, processes modifying each other or the operating system Dual-mode operation allows OS to protect itself and other system ...
... Or by a request from a user program for operating system service System call Other process problems include infinite loop, processes modifying each other or the operating system Dual-mode operation allows OS to protect itself and other system ...
Chapter 1: OS overview
... Or by a request from a user program for operating system service System call Other process problems include infinite loop, processes modifying each other or the operating system Dual-mode operation allows OS to protect itself and other system ...
... Or by a request from a user program for operating system service System call Other process problems include infinite loop, processes modifying each other or the operating system Dual-mode operation allows OS to protect itself and other system ...
Distributed operating system
A distributed operating system is a software over a collection of independent, networked, communicating, and physically separate computational nodes. Each individual node holds a specific software subset of the global aggregate operating system. Each subset is a composite of two distinct service provisioners. The first is a ubiquitous minimal kernel, or microkernel, that directly controls that node’s hardware. Second is a higher-level collection of system management components that coordinate the node's individual and collaborative activities. These components abstract microkernel functions and support user applications.The microkernel and the management components collection work together. They support the system’s goal of integrating multiple resources and processing functionality into an efficient and stable system. This seamless integration of individual nodes into a global system is referred to as transparency, or single system image; describing the illusion provided to users of the global system’s appearance as a single computational entity.