Single-copy Routing
... (Kleinberg) When r=2, an algorithm that uses only local information at each node (not 4) can reach the destination in expected time ...
... (Kleinberg) When r=2, an algorithm that uses only local information at each node (not 4) can reach the destination in expected time ...
lecture4
... several copies of bash, one in each process's virtual address space, it is better to have only one copy in physical memory and all of the processes running bash share it. Dynamic libraries are another common example of executing code shared between several processes. ...
... several copies of bash, one in each process's virtual address space, it is better to have only one copy in physical memory and all of the processes running bash share it. Dynamic libraries are another common example of executing code shared between several processes. ...
Document
... Reserving seats in trains or airlines Analyzing mathematical models Computing person income tax ...
... Reserving seats in trains or airlines Analyzing mathematical models Computing person income tax ...
Advances in Peer-to-peer Content Search
... peer and transfer the target content in a P2P fashion. At this point the Napster server is no longer required [2]. Although Napster proved successful and is said to be the grandfather of modern P2P computing models it suffered from a number of limitations. The major limitation was the fact that it c ...
... peer and transfer the target content in a P2P fashion. At this point the Napster server is no longer required [2]. Although Napster proved successful and is said to be the grandfather of modern P2P computing models it suffered from a number of limitations. The major limitation was the fact that it c ...
Reading Report 4 Yin Chen 26 Feb 2004
... Performance and scalability (aggregate storage size, response time, availability, query throughput) Reliability Anonymity ...
... Performance and scalability (aggregate storage size, response time, availability, query throughput) Reliability Anonymity ...
Biologically inspired robotics
... Provide inspiration for further robotics architectures More complex and accurate than ethology systems ...
... Provide inspiration for further robotics architectures More complex and accurate than ethology systems ...
A Hardware Independent Real-time Ethernet for Motion Control
... for the master node in time critical applications. For example, PROFINET IRT is achieved with a special switch ASIC (see [12]); dedicated NICs are mandatory for SERCOS III and Ethernet Powerlink’s master/management node in time-critical applications (see [13]); EtherCAT does not require a dedicated ...
... for the master node in time critical applications. For example, PROFINET IRT is achieved with a special switch ASIC (see [12]); dedicated NICs are mandatory for SERCOS III and Ethernet Powerlink’s master/management node in time-critical applications (see [13]); EtherCAT does not require a dedicated ...
Course: Operating Systems Instructor: M Umair
... Distribute the computation among several physical processors. Loosely coupled system – each processor has its own local memory; processors communicate with one another through various communications lines, such as high-speed buses or telephone lines. Advantages of distributed systems. Resources ...
... Distribute the computation among several physical processors. Loosely coupled system – each processor has its own local memory; processors communicate with one another through various communications lines, such as high-speed buses or telephone lines. Advantages of distributed systems. Resources ...
What is an Operating System? - E
... After I/O starts, control returns to user program without waiting for I/O completion z System call – request to the operating system to allow user to wait for I/O completion z Device-status table contains entry for each I/O device indicating its type, address, and state z Operating ...
... After I/O starts, control returns to user program without waiting for I/O completion z System call – request to the operating system to allow user to wait for I/O completion z Device-status table contains entry for each I/O device indicating its type, address, and state z Operating ...
FireWxNet: A Multi-Tiered Portable Wireless for Monitoring Weather
... reach base stations even in the varying presence of interference and asynchronous links. Rather than implement a protocol with guaranteed delivery, a best-effort converge-cast protocol was developed . In this protocol, messages are sent multiple times for reliability. Therefore every packet need not ...
... reach base stations even in the varying presence of interference and asynchronous links. Rather than implement a protocol with guaranteed delivery, a best-effort converge-cast protocol was developed . In this protocol, messages are sent multiple times for reliability. Therefore every packet need not ...
ppt
... Data: min 64 bytes (why?), max 1500 bytes CRC: checked at receiver, if error is detected, the frame is simply dropped ...
... Data: min 64 bytes (why?), max 1500 bytes CRC: checked at receiver, if error is detected, the frame is simply dropped ...
EL736 Communications Networks II: Design and Algorithms
... Add Heuristic Local Search Algorithm Start with a random location all sources connect to that location ...
... Add Heuristic Local Search Algorithm Start with a random location all sources connect to that location ...
P2P - School of ICT, SIIT, Thammasat University
... – No distinction between clients and servers; a peer may act as either depending on current objective – Individual peers must cooperate with each other – Advantages: • No longer depend on a single server (no single point of failure) • Addition of new users, leads to new server and clients (scales we ...
... – No distinction between clients and servers; a peer may act as either depending on current objective – Individual peers must cooperate with each other – Advantages: • No longer depend on a single server (no single point of failure) • Addition of new users, leads to new server and clients (scales we ...
Processes
... executing in parallel. This speed up can be achieved only if the computer has multiple processing elements (such as CPUs or I/O channels). – Modularity – construct a system in a modular function (i.e., dividing the system functions into separate processes). – Convenience – one user may have many tas ...
... executing in parallel. This speed up can be achieved only if the computer has multiple processing elements (such as CPUs or I/O channels). – Modularity – construct a system in a modular function (i.e., dividing the system functions into separate processes). – Convenience – one user may have many tas ...
Lecture 2 Processes and Threads
... Problem: users often wish to perform more than one activity at a time (load a remote file while editing a program, for example), and uniprogramming does not allow this. So DOS and other uniprogrammed systems put in things like memory-resident programs that invoked asynchronously, but still have ...
... Problem: users often wish to perform more than one activity at a time (load a remote file while editing a program, for example), and uniprogramming does not allow this. So DOS and other uniprogrammed systems put in things like memory-resident programs that invoked asynchronously, but still have ...
What is an Operating System?
... ■ Important principle, performed at many levels in a computer (in ...
... ■ Important principle, performed at many levels in a computer (in ...
memory is
... Adapted from the slides prepared by Alan Feuer Some material from Operating System Concepts by Silberschatz et. al. and Modern Operating Systems by Tanenbaum ...
... Adapted from the slides prepared by Alan Feuer Some material from Operating System Concepts by Silberschatz et. al. and Modern Operating Systems by Tanenbaum ...
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.