Communication Services for Advanced Network Applications
... to the same node in a message passing system. If a startpoint is bound to multiple endpoints, communication results in a multicast operation. A startpoint can be copied between processors, causing new communication links to be created that mirror the links associated with the original startpoint. He ...
... to the same node in a message passing system. If a startpoint is bound to multiple endpoints, communication results in a multicast operation. A startpoint can be copied between processors, causing new communication links to be created that mirror the links associated with the original startpoint. He ...
Multitasking and Time Slices
... • http://en.wikipedia.org/wiki/Time-sharing • Time-sharing refers to sharing a computing resource among many users by multitasking. Its introduction in the 1960s, and emergence as the prominent model of computing in the 1970s, represents a major historical shift in the history of computing. By allow ...
... • http://en.wikipedia.org/wiki/Time-sharing • Time-sharing refers to sharing a computing resource among many users by multitasking. Its introduction in the 1960s, and emergence as the prominent model of computing in the 1970s, represents a major historical shift in the history of computing. By allow ...
Operating-System Structures
... File-system manipulation - The file system is of particular interest. Obviously, programs need to read and write files and directories, create and delete them, search them, list file Information, permission ...
... File-system manipulation - The file system is of particular interest. Obviously, programs need to read and write files and directories, create and delete them, search them, list file Information, permission ...
Processes and threads
... A sequence of instructions being executed when there is no external intervention. Sometimes we want to share data as well as code. (Could just share files or memory and not use threads.) ...
... A sequence of instructions being executed when there is no external intervention. Sometimes we want to share data as well as code. (Could just share files or memory and not use threads.) ...
面向服务概述
... Tsinghua University Short Course on ServiceOriented Computing and Architecture, 2006. Jen-Yao Chung, “Service-Oriented Architecture and ...
... Tsinghua University Short Course on ServiceOriented Computing and Architecture, 2006. Jen-Yao Chung, “Service-Oriented Architecture and ...
Dynamic Node Reconfiguration in a Parallel
... and yields finer-grained control over the distribution of work. It also serves as a basis for using application knowledge to balance the load at runtime, rather than simply to effect a static decomposition into component processes. In addition, the process-level approach will tend to perform poor] y ...
... and yields finer-grained control over the distribution of work. It also serves as a basis for using application knowledge to balance the load at runtime, rather than simply to effect a static decomposition into component processes. In addition, the process-level approach will tend to perform poor] y ...
Figure 1-3
... large computers to desktop-sized computers that have powerful operating systems • Device drivers can extend the native function of an operating system to provide access and control over different types of devices • The BIOS is a low-level program code that operates between the computer hardware and ...
... large computers to desktop-sized computers that have powerful operating systems • Device drivers can extend the native function of an operating system to provide access and control over different types of devices • The BIOS is a low-level program code that operates between the computer hardware and ...
Computer Systems
... regaining control from user programs. Timer interrupts prevent a job from monopolizing the ...
... regaining control from user programs. Timer interrupts prevent a job from monopolizing the ...
Micro-CernVM: Slashing the Cost of Building and
... Virtual machines provide a uniform and portable environment for high energy physics applications [1]. The same virtual machine can be used for both development and for deployment on cloud infrastructures so that very same operating system libraries that are used to develop physics algorithms are als ...
... Virtual machines provide a uniform and portable environment for high energy physics applications [1]. The same virtual machine can be used for both development and for deployment on cloud infrastructures so that very same operating system libraries that are used to develop physics algorithms are als ...
Slide 1
... Each process is assigned a priority and the runnable process with the highest priority is allowed to run To prevent high-priority processes from running indefinitely, the scheduler may decrease the priority of currently running process at ...
... Each process is assigned a priority and the runnable process with the highest priority is allowed to run To prevent high-priority processes from running indefinitely, the scheduler may decrease the priority of currently running process at ...
lecture3
... Although virtual memory allows processes to have separate (virtual) address spaces, there are times when you need processes to share memory. For example there could be several processes in the system running the bash command shell. Rather than have several copies of bash, one in each process's virtu ...
... Although virtual memory allows processes to have separate (virtual) address spaces, there are times when you need processes to share memory. For example there could be several processes in the system running the bash command shell. Rather than have several copies of bash, one in each process's virtu ...
slides
... Definition: A root kit is a collection of trojans to replace widely used system utility programs in order to conceal the activities of an intruder. Example: You break into a system, you upload some files and install services to create a backdoor. The system administrator can find evidence of your in ...
... Definition: A root kit is a collection of trojans to replace widely used system utility programs in order to conceal the activities of an intruder. Example: You break into a system, you upload some files and install services to create a backdoor. The system administrator can find evidence of your in ...
Network Types (Cont.)
... site that wants to transmit information must wait until the token arrives. When the site completes its round of message passing, it retransmits the token. A token-passing scheme is used by the IBM and Apollo systems. Message slots. A number of fixed-length message slots continuously circulate in the ...
... site that wants to transmit information must wait until the token arrives. When the site completes its round of message passing, it retransmits the token. A token-passing scheme is used by the IBM and Apollo systems. Message slots. A number of fixed-length message slots continuously circulate in the ...
Active Monitoring Systems - Cyber-TA
... Kaleidoscope: An address shuffling middle-box Implemented on top of Click network processor ...
... Kaleidoscope: An address shuffling middle-box Implemented on top of Click network processor ...
FTSPcypress
... syncrhonized, the nodes can miss the packets sent by other nodes. As an alternative, the slave can have a guard time added to their wakeup time to remain active longer before going into sleep mode. This however increases the power consumption. So its imperative that the nodes maintain accurate time ...
... syncrhonized, the nodes can miss the packets sent by other nodes. As an alternative, the slave can have a guard time added to their wakeup time to remain active longer before going into sleep mode. This however increases the power consumption. So its imperative that the nodes maintain accurate time ...
pentest
... processor accesses the system data structures, and is the scheduler – Symmetric multiprocessing (SMP) ...
... processor accesses the system data structures, and is the scheduler – Symmetric multiprocessing (SMP) ...
Scheduling and Resource Management for Next
... commercial workloads – Contribution 3: scheduling multiple classes of applications ...
... commercial workloads – Contribution 3: scheduling multiple classes of applications ...
intro-shifts-dec14 - Indico
... Both teams are essential for first line of support between thousands of users, millions of jobs daily and the hundreds of sites where jobs are run, data is stored ...
... Both teams are essential for first line of support between thousands of users, millions of jobs daily and the hundreds of sites where jobs are run, data is stored ...
pdf
... IP Multicast in Data Centers • Useful, but rarely used. • Various problems: – Security – Stability – Scalability ...
... IP Multicast in Data Centers • Useful, but rarely used. • Various problems: – Security – Stability – Scalability ...
The History of Amoeba
... I/O in the kernel, after authorization checks are the done the kernel then sends the information requested back to the caller. Bullet File Server: The Bullet file server is the basic file server for Amoeba. It was designed for high performance and to store files in contiguously on disk. Typically al ...
... I/O in the kernel, after authorization checks are the done the kernel then sends the information requested back to the caller. Bullet File Server: The Bullet file server is the basic file server for Amoeba. It was designed for high performance and to store files in contiguously on disk. Typically al ...
Link-state routing protocol A link-state routing protocol is one of the
... Link state algorithms are sometimes characterized by the phrase ‘Each router tells the world about its neighbors’. Distributing maps This description covers only the simplest configuration; i.e. one with no areas, so that all nodes do have a map of the entire network. The hierarchical case is somewh ...
... Link state algorithms are sometimes characterized by the phrase ‘Each router tells the world about its neighbors’. Distributing maps This description covers only the simplest configuration; i.e. one with no areas, so that all nodes do have a map of the entire network. The hierarchical case is somewh ...
Peer-to-Peer Algorithms
... FromNeighborAmount and RepliesToGet), which need to be present to have good performance – Next, we are going to boost these 6 inputs by generalizing them to give more accurate information for forwarding • Also, we need to discover: – What are the scalability factors of NeuroSearch in large graphs – ...
... FromNeighborAmount and RepliesToGet), which need to be present to have good performance – Next, we are going to boost these 6 inputs by generalizing them to give more accurate information for forwarding • Also, we need to discover: – What are the scalability factors of NeuroSearch in large graphs – ...
Abstract View of System Components
... Each processor runs and 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 processor schedules and allocated work t ...
... Each processor runs and 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 processor schedules and allocated work t ...
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.