ppt - Calit2
... Essentially, the OptIPuter is a "virtual metacomputer" in which the individual "processors" are widely distributed Linux PC clusters; the "backplane" is provided by Internet Protocol (IP) delivered over multiple dedicated 1-10 Gbps optical wavelengths; and, the "mass storage systems" are large distr ...
... Essentially, the OptIPuter is a "virtual metacomputer" in which the individual "processors" are widely distributed Linux PC clusters; the "backplane" is provided by Internet Protocol (IP) delivered over multiple dedicated 1-10 Gbps optical wavelengths; and, the "mass storage systems" are large distr ...
A Scalable Location Service for Geographic Ad Hoc Routing
... Nodes forward each others’ packets. No infrastructure; easy to deploy; fault tolerant. Short hops are good for power and spectrum. Can it be made to work? ...
... Nodes forward each others’ packets. No infrastructure; easy to deploy; fault tolerant. Short hops are good for power and spectrum. Can it be made to work? ...
Operating System Implications of Fast, Cheap, Non-Volatile Memory
... • Data corruption. If a hardware or software fault corrupts application state, then that corruption is non-volatile, particularly if the system has a singlelevel store. A benefit of having a two-level store is that data is (implicitly or explicitly) scrubbed as it is transferred between the levels. ...
... • Data corruption. If a hardware or software fault corrupts application state, then that corruption is non-volatile, particularly if the system has a singlelevel store. A benefit of having a two-level store is that data is (implicitly or explicitly) scrubbed as it is transferred between the levels. ...
Operating System Implications of Fast, Cheap, Non
... • Data corruption. If a hardware or software fault corrupts application state, then that corruption is non-volatile, particularly if the system has a singlelevel store. A benefit of having a two-level store is that data is (implicitly or explicitly) scrubbed as it is transferred between the levels. ...
... • Data corruption. If a hardware or software fault corrupts application state, then that corruption is non-volatile, particularly if the system has a singlelevel store. A benefit of having a two-level store is that data is (implicitly or explicitly) scrubbed as it is transferred between the levels. ...
Architectural Support for Protection Rings
... Modern operating systems treat a segment as one of a number of general objects, each with its Access Control List (ACL) that specifies which processes can access it. ...
... Modern operating systems treat a segment as one of a number of general objects, each with its Access Control List (ACL) that specifies which processes can access it. ...
ISA 562 - GMU Computer Science
... Logical: requires translation to a physical address Relative: location relative to known point ( ex: array) Physical: absolute address or actual location ...
... Logical: requires translation to a physical address Relative: location relative to known point ( ex: array) Physical: absolute address or actual location ...
I/O Systems - McMaster Computing and Software
... such as disk controllers ), it is wasteful to tie up the CPU, transferring data in and out of registers one byte at a time. n Instead a special processor called (Direct Memory ...
... such as disk controllers ), it is wasteful to tie up the CPU, transferring data in and out of registers one byte at a time. n Instead a special processor called (Direct Memory ...
ch04
... Chapter 4: Processes Process Concept Process Scheduling Operations on Processes Cooperating Processes ...
... Chapter 4: Processes Process Concept Process Scheduling Operations on Processes Cooperating Processes ...
DIGITAL SYSTEM FOR TELECOMMUNICATIONS II (Verizon)
... f. Demonstrate a basic understanding of networks ...
... f. Demonstrate a basic understanding of networks ...
CS 291 – Dynamic Web Prog. With PHP
... ◦ main memory can be viewed as a last cache for secondary storage. ...
... ◦ main memory can be viewed as a last cache for secondary storage. ...
Overview of OS/2
... OS/2 is a multitasking operating system. The existence of multiple processes and asynchronous concurrent threads implies the need for mechanisms to allow processes to exchange data and to synchronize the execution of their threads. Interprocess communication primitives provide these basic features f ...
... OS/2 is a multitasking operating system. The existence of multiple processes and asynchronous concurrent threads implies the need for mechanisms to allow processes to exchange data and to synchronize the execution of their threads. Interprocess communication primitives provide these basic features f ...
... numbers, letters, images, movies, sounds, documents, and programs, to name a few. A byte is 8 bits, and on most computers it is the smallest convenient chunk of storage. For example, most computers don’t have an instruction to move a bit but do have one to move a byte. A less common term is word, wh ...
On-Line & Real-Time Modes of Use Presentation
... Process control is extensively used in industry and enables mass production of continuous processes such as oil refining, paper manufacturing, chemicals, power plants and many other industries. Process control enables automation, with which a small staff of operating personnel can operate a complex ...
... Process control is extensively used in industry and enables mass production of continuous processes such as oil refining, paper manufacturing, chemicals, power plants and many other industries. Process control enables automation, with which a small staff of operating personnel can operate a complex ...
Implementing Processes, Threads, and Resources
... Operating Systems: A Modern Perspective, Chapter 3 ...
... Operating Systems: A Modern Perspective, Chapter 3 ...
Microkernels
... • (Like all other programs) they contain bugs • How to organize them so that bugs do not • … bring down systems • … impede normal operation • … etc. CS-502 (EMC) Fall 2009 ...
... • (Like all other programs) they contain bugs • How to organize them so that bugs do not • … bring down systems • … impede normal operation • … etc. CS-502 (EMC) Fall 2009 ...
Figure 5.01
... counter, and one sequence of instructions that can be carried out at any given time. ...
... counter, and one sequence of instructions that can be carried out at any given time. ...
topology discovery in sensor networks
... The models described above could be used for many network management functions like : ...
... The models described above could be used for many network management functions like : ...
Workshop 6 Slides - dhdurso.org index to available resources
... Users not aware of multiplicity of machines. Access to remote resources similar to access to local resources. Data Migration – transfer data by transferring entire file, or transferring only those portions of the file necessary for the immediate task. Computation Migration – transfer the computation ...
... Users not aware of multiplicity of machines. Access to remote resources similar to access to local resources. Data Migration – transfer data by transferring entire file, or transferring only those portions of the file necessary for the immediate task. Computation Migration – transfer the computation ...
Threads and Virtualization - Computer Science Department
... User-level Threads • User-level threads are created by calling functions in a user-level library. • The process that uses user-level threads appears (to the OS) to be a single threaded process so there is no way to distribute the threads in a multiprocessor or block only part of the process. • The ...
... User-level Threads • User-level threads are created by calling functions in a user-level library. • The process that uses user-level threads appears (to the OS) to be a single threaded process so there is no way to distribute the threads in a multiprocessor or block only part of the process. • The ...
CHAP10
... – control over task priorities and rights – user should be able to distinguish between hard and soft tasks and to specify relative priorities within each class – May allow user to specify such characteristics as: ...
... – control over task priorities and rights – user should be able to distinguish between hard and soft tasks and to specify relative priorities within each class – May allow user to specify such characteristics as: ...
Introduction to Operating Systems (continued)
... • Processes & threads • Multiplexing of processor(s) to create the illusion of many of them ...
... • Processes & threads • Multiplexing of processor(s) to create the illusion of many of them ...
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.