PCEP-P2MP-MIB
... across MPLS networks is increasing. • There is a clear need to protect these real-time applications and to provide the shortest switching times in the event of failure. • The scope of this document • outlines the requirements, • describes the protection mechanisms available, • Propose the necessary ...
... across MPLS networks is increasing. • There is a clear need to protect these real-time applications and to provide the shortest switching times in the event of failure. • The scope of this document • outlines the requirements, • describes the protection mechanisms available, • Propose the necessary ...
powerpoint 97 - Computer Science Division
... less need today to centralize vs. bus oriented systems ...
... less need today to centralize vs. bus oriented systems ...
slides
... The following are important for availability, but not in scope: Techniques that ISPs use. Techniques to enhance availability of individual components of the system. ...
... The following are important for availability, but not in scope: Techniques that ISPs use. Techniques to enhance availability of individual components of the system. ...
Introduction to Computer Science
... ◘ Hardware and operating systems may be dissimilar Object-Oriented Analysis and Design with the Unified Process ...
... ◘ Hardware and operating systems may be dissimilar Object-Oriented Analysis and Design with the Unified Process ...
Chapter 6: Process/thread Synchronization
... consumer-producer problem that fills all the buffers. We can do so by having an integer count that keeps track of the number of full buffers. Initially, count is set to 0. It is incremented by the producer after it produces a new buffer and is decremented by the consumer after it consumes a buffer." ...
... consumer-producer problem that fills all the buffers. We can do so by having an integer count that keeps track of the number of full buffers. Initially, count is set to 0. It is incremented by the producer after it produces a new buffer and is decremented by the consumer after it consumes a buffer." ...
Threads
... It takes up memory resource: entire process is replicated Communication and synchronization is expensive Requiring calling into the OS kernel ...
... It takes up memory resource: entire process is replicated Communication and synchronization is expensive Requiring calling into the OS kernel ...
PPT_ch01_PPT_ch01 - CCRI Faculty Web
... A Short History of Operating Systems • In 1984, Apple Macintosh developed a GUI and mouse pointing device, which allowed users to interact with the OS on a graphical screen. • The mouse allowed users to point at or click icons or to select items from menus to accomplish tasks. • When the Macintosh ...
... A Short History of Operating Systems • In 1984, Apple Macintosh developed a GUI and mouse pointing device, which allowed users to interact with the OS on a graphical screen. • The mouse allowed users to point at or click icons or to select items from menus to accomplish tasks. • When the Macintosh ...
Processes
... Processes must name each other explicitly: send (P, message) – send a message to process P receive(Q, message) – receive a message from process Q Properties of communication link Links are established automatically. A link is associated with exactly one pair of communicating ...
... Processes must name each other explicitly: send (P, message) – send a message to process P receive(Q, message) – receive a message from process Q Properties of communication link Links are established automatically. A link is associated with exactly one pair of communicating ...
Operating System Services
... 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 storage, I/O ...
... 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 storage, I/O ...
Leveraging Identity-based Cryptography for Node ID Assignment in
... Key expiry can be incorporated in an ID-based system by including the current date or time as part of the public key, along with the node ID [2]. However, the validity period affects the security of the system; if the time period is too short, updating the corresponding private key may introduce unn ...
... Key expiry can be incorporated in an ID-based system by including the current date or time as part of the public key, along with the node ID [2]. However, the validity period affects the security of the system; if the time period is too short, updating the corresponding private key may introduce unn ...
Set 13
... Kernel I/O Subsystem Transforming I/O Requests to Hardware Operations Streams Performance ...
... Kernel I/O Subsystem Transforming I/O Requests to Hardware Operations Streams Performance ...
Power Consumption and Maximizing Network Lifetime during
... optimizing the distribution the power consumption between source node and sink node. Given any number of randomly deployed nodes over an area, we illustrate that a simple local optimization scheme executed at each node guarantees strong connectivity of the entire network and attains the global minim ...
... optimizing the distribution the power consumption between source node and sink node. Given any number of randomly deployed nodes over an area, we illustrate that a simple local optimization scheme executed at each node guarantees strong connectivity of the entire network and attains the global minim ...
Operating System
... Normally the operating system has a number of key elements: (i) a technical layer of software for driving the hardware of the computer, like disk drives, the keyboard and the screen; (ii) a filesystem which provides a way of organizing files logically, and (iii) a simple command language which enabl ...
... Normally the operating system has a number of key elements: (i) a technical layer of software for driving the hardware of the computer, like disk drives, the keyboard and the screen; (ii) a filesystem which provides a way of organizing files logically, and (iii) a simple command language which enabl ...
process
... • The Operating System must – Interleave the execution of multiple processes – Allocate resources to processes, and protect the resources of each process from other processes, – Enable processes to share and exchange information, – Enable synchronization among processes. ...
... • The Operating System must – Interleave the execution of multiple processes – Allocate resources to processes, and protect the resources of each process from other processes, – Enable processes to share and exchange information, – Enable synchronization among processes. ...
Processes and Resources Operating System Control Structures
... – Scheduling-related information: This will depend on the scheduling algorithm used. Examples are the amount of time that the process has been waiting and the amount of time that the process executed the last time it was running. – Event: Identity of event the process is awaiting before it can be ...
... – Scheduling-related information: This will depend on the scheduling algorithm used. Examples are the amount of time that the process has been waiting and the amount of time that the process executed the last time it was running. – Event: Identity of event the process is awaiting before it can be ...
HD3312521256
... protocol performs well in some cases while have drawbacks in other cases. We also use the concept of path ranking in DSR and shown that it has very good effect on the performance of existing DSR. Simulation results demonstrated in terms of throughput, end-to-end delay and packet delivery fraction ag ...
... protocol performs well in some cases while have drawbacks in other cases. We also use the concept of path ranking in DSR and shown that it has very good effect on the performance of existing DSR. Simulation results demonstrated in terms of throughput, end-to-end delay and packet delivery fraction ag ...
- Free Documents
... G V. E where V is the set of vertices nodes and E the set of edges links.e. Indeed. attacks and so on. We model our problem in Section . the work presented in this paper gives a new approach for monitoring connectivity in wireless sensors networks. The source of failures in this classification is di ...
... G V. E where V is the set of vertices nodes and E the set of edges links.e. Indeed. attacks and so on. We model our problem in Section . the work presented in this paper gives a new approach for monitoring connectivity in wireless sensors networks. The source of failures in this classification is di ...
Silberschatz, Galvin and Gagne ©2013 Operating System Concepts
... Silberschatz, Galvin and Gagne ©2013 ...
... Silberschatz, Galvin and Gagne ©2013 ...
tasks, threads and processes, confused?
... SVR4 enabled multiple processes to share a single processor. This feature, at that time, was referred to as multiprogramming or multitasking [BAC86]. Sitting at the heart of UNIX is the kernel. The ...
... SVR4 enabled multiple processes to share a single processor. This feature, at that time, was referred to as multiprogramming or multitasking [BAC86]. Sitting at the heart of UNIX is the kernel. The ...
EECC722 - Shaaban
... – Kernel threads also cause more conflicts in those resources, both with other kernel threads and with user threads; on the other hand, there is an positive interthread sharing effect as well. ...
... – Kernel threads also cause more conflicts in those resources, both with other kernel threads and with user threads; on the other hand, there is an positive interthread sharing effect as well. ...
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.