Slides - Bilkent University Computer Engineering Department
... – Huge range, including denial-of-service, worms, viruses, identity theft, theft of service Systems generally first distinguish among users, to determine who can do what – User identities (user IDs, security IDs) include name and associated number, one per user – User ID then associated with all fil ...
... – Huge range, including denial-of-service, worms, viruses, identity theft, theft of service Systems generally first distinguish among users, to determine who can do what – User identities (user IDs, security IDs) include name and associated number, one per user – User ID then associated with all fil ...
Operating system concepts
... What is OS? • “Software that manages the sharing of the resources of a computer”---Wikipedia – Sharing by what? • Independent executables (programs) ...
... What is OS? • “Software that manages the sharing of the resources of a computer”---Wikipedia – Sharing by what? • Independent executables (programs) ...
cs459 - Operating Systems: Introduction
... • Multiprogramming: Concurrent process execution – A set of jobs is kept in memory (or partially on disk) – The OS job scheduler module picks one to execute – A OS switch occurs when it blocks (ex: for I/O) ...
... • Multiprogramming: Concurrent process execution – A set of jobs is kept in memory (or partially on disk) – The OS job scheduler module picks one to execute – A OS switch occurs when it blocks (ex: for I/O) ...
virtual machine
... Whereas the real I/O might have taken 100 milliseconds, the virtual I/O might take less time (because it is spooled) or more time (because it is interpreted.) The CPU is being multi-programmed among many virtual machines, further slowing down the virtual machines in unpredictable ways. ...
... Whereas the real I/O might have taken 100 milliseconds, the virtual I/O might take less time (because it is spooled) or more time (because it is interpreted.) The CPU is being multi-programmed among many virtual machines, further slowing down the virtual machines in unpredictable ways. ...
ppt
... – usually has a single bus or backplane to which all processors and memories are connected – has very low communication latency – processors communicate through shared memory ...
... – usually has a single bus or backplane to which all processors and memories are connected – has very low communication latency – processors communicate through shared memory ...
Lecture Notes - UCLA Computer Science
... hardware, operating system, software) Information in use copied from slower to faster storage temporarily Faster storage (cache) checked first to determine if information is ...
... hardware, operating system, software) Information in use copied from slower to faster storage temporarily Faster storage (cache) checked first to determine if information is ...
Software systems and issues operating systems file systems and databases applications
... a Personal Computer, (ii) provides a platform for developing applications by exposing functionality to ISVs through APIs, and (iii) supplies a user interface that enables users to access functionality of the operating system and in which they can run applications. US District Court for the District ...
... a Personal Computer, (ii) provides a platform for developing applications by exposing functionality to ISVs through APIs, and (iii) supplies a user interface that enables users to access functionality of the operating system and in which they can run applications. US District Court for the District ...
Lecture 2
... • Another set of OS functions exists for ensuring the efficient operation of the system itself via resource sharing – Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them • Many types of resources - CPU cycles, main memory, file ...
... • Another set of OS functions exists for ensuring the efficient operation of the system itself via resource sharing – Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them • Many types of resources - CPU cycles, main memory, file ...
Transparency in Distributed Systems
... The implementation of the distributed system is very complex, as a number of issues have to be considered to achieve its final objective. The complexities should not worry the user of the distributed system from using it i.e., the complexities should be hidden from the user who uses the distributed ...
... The implementation of the distributed system is very complex, as a number of issues have to be considered to achieve its final objective. The complexities should not worry the user of the distributed system from using it i.e., the complexities should be hidden from the user who uses the distributed ...
CSci 530 OPERATING SYSTEMS
... COURSE OBJECTIVES: The course objectives are two-fold: • To learn general theory, concept, and techniques related to the design of operating systems, • To practice the design of an operating system by performing programming exercises of various OS components and principles. COURSE DESCRIPTION: Gener ...
... COURSE OBJECTIVES: The course objectives are two-fold: • To learn general theory, concept, and techniques related to the design of operating systems, • To practice the design of an operating system by performing programming exercises of various OS components and principles. COURSE DESCRIPTION: Gener ...
Operating Systems Overview - Physics, Computer Science and
... z Big change in computer usage: y debugging now done offline from print outs and memory dumps. y No more instant feedback. ...
... z Big change in computer usage: y debugging now done offline from print outs and memory dumps. y No more instant feedback. ...
ppt - MMLab
... 2002.6. Brent Chun and Timothy Roscoe (Intel Research), Eric Fraser (UC Berkeley), and Mike Wawrzoniak (Princeton) bring up first PlanetLab nodes at Intel Research - Berkeley, UC Berkeley, and Princeton. The initial system (dubbed Version 0.5) leverages the Ganglia monitoring service and the RootSto ...
... 2002.6. Brent Chun and Timothy Roscoe (Intel Research), Eric Fraser (UC Berkeley), and Mike Wawrzoniak (Princeton) bring up first PlanetLab nodes at Intel Research - Berkeley, UC Berkeley, and Princeton. The initial system (dubbed Version 0.5) leverages the Ganglia monitoring service and the RootSto ...
Operating Systems
... Initializes registers and power management Performs the power-on self-test (POST) Displays system settings Determines which devices are bootable Initiates the signed OS start-up sequence ...
... Initializes registers and power management Performs the power-on self-test (POST) Displays system settings Determines which devices are bootable Initiates the signed OS start-up sequence ...
Chapter 1 - OS Overview
... instruction at a time – the entire program didn’t have to reside in memory before execution – divides the programs into segments keeping them in secondary storage ...
... instruction at a time – the entire program didn’t have to reside in memory before execution – divides the programs into segments keeping them in secondary storage ...
Document
... Write, compile, debug, and execute C programs that correctly use system interfaces provided by UNIX (or a UNIXlike operating system). ...
... Write, compile, debug, and execute C programs that correctly use system interfaces provided by UNIX (or a UNIXlike operating system). ...
Chapter - 5th Semester Notes
... – Allocating resources to multiple users or multiple jobs running at the same time. ...
... – Allocating resources to multiple users or multiple jobs running at the same time. ...
Operating System Structures
... Shell executes fork() system call to create process, then calls exec() to load program into process ...
... Shell executes fork() system call to create process, then calls exec() to load program into process ...
PPT
... – usually has a single bus or backplane to which all processors and memories are connected – has very low communication latency – processors communicate through shared memory ...
... – usually has a single bus or backplane to which all processors and memories are connected – has very low communication latency – processors communicate through shared memory ...
Resume - Louis Williams
... Software Engineering Intern Summer 2016 • Develop with the core server team to implement a feature that utilizes exotic network transports for high-performance computing applications. Prox-1 Satellite Mission Georgia Tech Flight Software Lead Spring 2014 - Current • Manage a team of undergraduates t ...
... Software Engineering Intern Summer 2016 • Develop with the core server team to implement a feature that utilizes exotic network transports for high-performance computing applications. Prox-1 Satellite Mission Georgia Tech Flight Software Lead Spring 2014 - Current • Manage a team of undergraduates t ...
Top Five Current Operating System Issues
... Operating Systems these days hog enormous amounts of memory[2]. We’re supposed to blindly accept this consequence of technological success, and we’re not supposed to care with memory as cheap as it is these days. Even still, the excessive amounts of memory that operating systems alone seem to devour ...
... Operating Systems these days hog enormous amounts of memory[2]. We’re supposed to blindly accept this consequence of technological success, and we’re not supposed to care with memory as cheap as it is these days. Even still, the excessive amounts of memory that operating systems alone seem to devour ...
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.