performance analysis of wdm optical shuffle – exchange
... wavelengths required in our case is 5194 whereas for former case the required number is 9900. This also results in reduction of sizes of optical switches, which is also a prime factor for cost effective implementation [3].We show in the later part of the section that our algorithm is better than BFS ...
... wavelengths required in our case is 5194 whereas for former case the required number is 9900. This also results in reduction of sizes of optical switches, which is also a prime factor for cost effective implementation [3].We show in the later part of the section that our algorithm is better than BFS ...
Chapter 4 Multi-PON architecture 4.1 State-of-the-art
... each node in each time slot. The control slot is further partitioned into M mini-slots. As a consequence of this scheme, the nodes see the network as a set of dynamic TDMA sub-networks (one per wavelength) in a way that a MAC protocol is required to avoid transmission collisions (multiple transmissi ...
... each node in each time slot. The control slot is further partitioned into M mini-slots. As a consequence of this scheme, the nodes see the network as a set of dynamic TDMA sub-networks (one per wavelength) in a way that a MAC protocol is required to avoid transmission collisions (multiple transmissi ...
Chapter 5
... Strategies for Handling Deadlocks (continued) • Avoidance: even if one of the 4 conditions to prevent deadlock cannot be removed, the OS can avoid deadlock if the OS knows ahead of time the sequence of requests associated with each active process. • Dijkstra’s Bankers Algorithm – Algorithm to regul ...
... Strategies for Handling Deadlocks (continued) • Avoidance: even if one of the 4 conditions to prevent deadlock cannot be removed, the OS can avoid deadlock if the OS knows ahead of time the sequence of requests associated with each active process. • Dijkstra’s Bankers Algorithm – Algorithm to regul ...
Modeling and predicting end-to-end response times in multi-tier Internet applications
... applications. Modern Web sites such as amazon.com, yahoo.com, and ebay.com do not simply deliver static pages but generate content on the fly using multitiered applications, so that the pages can be customized for each user. For example, a single request to amazon.com’s home page is served by hundred ...
... applications. Modern Web sites such as amazon.com, yahoo.com, and ebay.com do not simply deliver static pages but generate content on the fly using multitiered applications, so that the pages can be customized for each user. For example, a single request to amazon.com’s home page is served by hundred ...
File
... 5. What are the goals of operating systems? Operating systems must 1. Provide for efficient use of computer hardware. 2. Provide a reliable environment for the running of programs. 3. Handle errors reasonably and with sufficient feedback. 4. Provide services (tools, languages) for users. 5. Hide the ...
... 5. What are the goals of operating systems? Operating systems must 1. Provide for efficient use of computer hardware. 2. Provide a reliable environment for the running of programs. 3. Handle errors reasonably and with sufficient feedback. 4. Provide services (tools, languages) for users. 5. Hide the ...
Non-Transitive Connectivity and DHTs
... For example, assume that a node A learns about a potential neighbor B through a third node C, but A and B cannot directly communicate. We say that from A’s perspective B is an invisible node. In early versions of both Bamboo and i3-Chord, A would blindly add B as a neighbor. Later, A would notice th ...
... For example, assume that a node A learns about a potential neighbor B through a third node C, but A and B cannot directly communicate. We say that from A’s perspective B is an invisible node. In early versions of both Bamboo and i3-Chord, A would blindly add B as a neighbor. Later, A would notice th ...
The Announcement Layer: Beacon Coordination for
... – Nodes primarily use structured overlay network (SON) IDs as network endpoints. ...
... – Nodes primarily use structured overlay network (SON) IDs as network endpoints. ...
Chapter 3 - reduced
... Process Concept (Cont.) Program is passive entity stored on disk (executable file), ...
... Process Concept (Cont.) Program is passive entity stored on disk (executable file), ...
Steps of porting (cont
... of system resources and could not control hardware directly user programs are working in user-space ...
... of system resources and could not control hardware directly user programs are working in user-space ...
A Quantitative Analysis of the Gnutella Network Traffic”
... 4. Although Gnutella is a truly international phenomenon its largest segment is contributed by only a few countries. 5. The clients started conforming to the specifications of the protocol and that they thwart excessive network resources consumption. We are interested in examining more carefully oth ...
... 4. Although Gnutella is a truly international phenomenon its largest segment is contributed by only a few countries. 5. The clients started conforming to the specifications of the protocol and that they thwart excessive network resources consumption. We are interested in examining more carefully oth ...
Operating Systems II
... Hardware Support for Operating Systems Recall that OS should securely multiplex resources. ⇒ we need to ensure that an application cannot: • compromise the operating system. • compromise other applications. • deny others service (e.g. abuse resources) To achieve this efficiently and flexibly, we ne ...
... Hardware Support for Operating Systems Recall that OS should securely multiplex resources. ⇒ we need to ensure that an application cannot: • compromise the operating system. • compromise other applications. • deny others service (e.g. abuse resources) To achieve this efficiently and flexibly, we ne ...
Synchronize Your Watches Synchronize Your Watches Part I
... number of distinct cooperating processes, often with quite different complexities, that run on physically disjointed machines. but not least, using the very same network for both communication and synchronization reduces implementation costs. It is worth remarking that clock synchronization is adopt ...
... number of distinct cooperating processes, often with quite different complexities, that run on physically disjointed machines. but not least, using the very same network for both communication and synchronization reduces implementation costs. It is worth remarking that clock synchronization is adopt ...
Chapter 3 Process Description and Control Major
... exception of any shared memory; – Increments counters for any files owned by the parent, to reflect that an additional process now also owns those files; – Assigns the child process to the Ready to Run state; – Returns the ID number of the child to the parent process, and a 0 value to the child proc ...
... exception of any shared memory; – Increments counters for any files owned by the parent, to reflect that an additional process now also owns those files; – Assigns the child process to the Ready to Run state; – Returns the ID number of the child to the parent process, and a 0 value to the child proc ...
Lecture 1 - inst.eecs.berkeley.edu
... – Make hardware limitations go away – Provide illusion of dedicated machine with infinite memory and infinite processors ...
... – Make hardware limitations go away – Provide illusion of dedicated machine with infinite memory and infinite processors ...
IS231461465
... Since MANET is highly dynamic in nature, we need a way to control this system through mobile or wired terminals connected to the mobile node. The system needs integrated management software that supports FCAPS i.e. Fault, Configuration, Accounting, Performance and Security to all system components. ...
... Since MANET is highly dynamic in nature, we need a way to control this system through mobile or wired terminals connected to the mobile node. The system needs integrated management software that supports FCAPS i.e. Fault, Configuration, Accounting, Performance and Security to all system components. ...
Virtual machines - cs.rochester.edu
... • Performs memory management and scheduling required to coordinate multiple operating systems. ...
... • Performs memory management and scheduling required to coordinate multiple operating systems. ...
EN7278
... Rooftop networks are mobile network that are placed on rooftop of building. They are not mobile in nature , which are wirelessly fixed in densely in metropolitan areas. The rooftop networks replaced the older telecommunication wired networks. GPSR consits of greedy forwarding and perimeter forwardin ...
... Rooftop networks are mobile network that are placed on rooftop of building. They are not mobile in nature , which are wirelessly fixed in densely in metropolitan areas. The rooftop networks replaced the older telecommunication wired networks. GPSR consits of greedy forwarding and perimeter forwardin ...
Open Source
... Key factors: features and performance It runs on a wider range of hardware platforms and run on less expensive and powerful systems. Linux exceeds other operating systems in its multiprocessing capabilities and its support of advanced TCP/IP networking facilities ...
... Key factors: features and performance It runs on a wider range of hardware platforms and run on less expensive and powerful systems. Linux exceeds other operating systems in its multiprocessing capabilities and its support of advanced TCP/IP networking facilities ...
UNIX Operating System
... understand naming patterns for devices on Linux. Special device files are used by kernel drivers to control a device. There can be more than one special device file that maps to the same physical device. For example, in a multipath environment with four paths to the same device, four different dev ...
... understand naming patterns for devices on Linux. Special device files are used by kernel drivers to control a device. There can be more than one special device file that maps to the same physical device. For example, in a multipath environment with four paths to the same device, four different dev ...
CHEP2009_poster_jorge - Indico
... facilities with approximately 106 kSI2K of computing power and 200TBs of disk storage. The facilities are centrally managed; each with dedicated computing resources and manpower. Tier3 sites on the other hand range in size from a single interactive analysis computer or small cluster to large facilit ...
... facilities with approximately 106 kSI2K of computing power and 200TBs of disk storage. The facilities are centrally managed; each with dedicated computing resources and manpower. Tier3 sites on the other hand range in size from a single interactive analysis computer or small cluster to large facilit ...
Circumventing Picture Archiving and Communication Systems
... Pieces of data can be tagged with key names. They in turn can inform Hadoop, on how to send related bits of information to a common destination node. Individual node failures can be handled successfully by restarting tasks on other machines. User-level tasks do not communicate explicitly with one an ...
... Pieces of data can be tagged with key names. They in turn can inform Hadoop, on how to send related bits of information to a common destination node. Individual node failures can be handled successfully by restarting tasks on other machines. User-level tasks do not communicate explicitly with one an ...
Kernel I/O Subsystem
... Objectives Explore the structure of an operating system’s I/O subsystem Discuss the principles of I/O hardware and its complexity Provide details of the performance aspects of I/O hardware and software ...
... Objectives Explore the structure of an operating system’s I/O subsystem Discuss the principles of I/O hardware and its complexity Provide details of the performance aspects of I/O hardware and software ...
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.