Stallings - Chapter 11
... bottleneck for computation Most I/O devices are extremely slow compared ...
... bottleneck for computation Most I/O devices are extremely slow compared ...
Operating-System Structures
... Parameters stored in a block, or table, in memory, and address of block passed as a parameter in a register This approach taken by Linux and Solaris Parameters placed, or pushed, onto the stack by the program and popped off the stack by the operating system Block and stack methods do not limit the ...
... Parameters stored in a block, or table, in memory, and address of block passed as a parameter in a register This approach taken by Linux and Solaris Parameters placed, or pushed, onto the stack by the program and popped off the stack by the operating system Block and stack methods do not limit the ...
Chapter 10
... Comparison of Network and Distributed Operating Systems (cont'd.) • Distributed operating systems (DO/S) provide a unified environment designed to optimize operations for the network as a whole, not just for local sites. • The major difference between a NOS and a DO/S is how each views and manages ...
... Comparison of Network and Distributed Operating Systems (cont'd.) • Distributed operating systems (DO/S) provide a unified environment designed to optimize operations for the network as a whole, not just for local sites. • The major difference between a NOS and a DO/S is how each views and manages ...
UNIT – II – Virtualization
... the loaded classes • Run time data areas store run time data like stack. • Each class execution is done by means of a java thread. ...
... the loaded classes • Run time data areas store run time data like stack. • Each class execution is done by means of a java thread. ...
System Call
... Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them ...
... Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them ...
2.01
... Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them ...
... Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them ...
NET201_Lecture3-22
... A program becomes a job when selected by the operating system and brought to the hold state It remains in this state until it can be loaded into memory When there is memory space available to load the program totally or partially, the job moves to the ready state. It now becomes a process It remains ...
... A program becomes a job when selected by the operating system and brought to the hold state It remains in this state until it can be loaded into memory When there is memory space available to load the program totally or partially, the job moves to the ready state. It now becomes a process It remains ...
Hardware
... The unit of data exchanged between cache and main memory Larger block size more hits until probability of using newly fetched data becomes less than the probability of reusing data that have to be moved out of cache ...
... The unit of data exchanged between cache and main memory Larger block size more hits until probability of using newly fetched data becomes less than the probability of reusing data that have to be moved out of cache ...
I/O devices
... • Throughput is the number of tasks completed by server per unit time • Response time is the elapsed time between tasks entering queue and tasks completed by the server • Tradeoff between throughput and response time – Highest possible throughput is when the server is always busy and the queue is ne ...
... • Throughput is the number of tasks completed by server per unit time • Response time is the elapsed time between tasks entering queue and tasks completed by the server • Tradeoff between throughput and response time – Highest possible throughput is when the server is always busy and the queue is ne ...
I R T R ECHNICAL
... spreading of active worms through web servers, email viruses and distributed denial of service attacks. Networks of interest include communication networks as well as sensor networks. We are principally interested in developing efficient and high performance algorithms for these problems while utili ...
... spreading of active worms through web servers, email viruses and distributed denial of service attacks. Networks of interest include communication networks as well as sensor networks. We are principally interested in developing efficient and high performance algorithms for these problems while utili ...
Module 3: Processes and Process management
... processor is shared amongst many processes. In the first module we indicated that the human computer interface provided by an OS involves supporting many concurrent processes like clock, icons and one or more windows.A system like a file server may even support processes from multiple users. And yet ...
... processor is shared amongst many processes. In the first module we indicated that the human computer interface provided by an OS involves supporting many concurrent processes like clock, icons and one or more windows.A system like a file server may even support processes from multiple users. And yet ...
Elektronischer Hšrsaal
... – Can use distributed overlay network strategies (done in P2P systems!) • Multicast • P2P paradigm: “do work for others to enhance the total system“ (for your own good) - e.g. transcoding, act as a PEP, .. – Can exploit highly sophisticated network measurements! • some take a long time, some require ...
... – Can use distributed overlay network strategies (done in P2P systems!) • Multicast • P2P paradigm: “do work for others to enhance the total system“ (for your own good) - e.g. transcoding, act as a PEP, .. – Can exploit highly sophisticated network measurements! • some take a long time, some require ...
ch16-Distributed_System_Structures
... Access to remote resources similar to access to local resources ...
... Access to remote resources similar to access to local resources ...
Introduction - Adaptive Systems Lab
... subsequent packets refresh the previous associated reservations en-route outstanding reservations and states automatically time out (i.e., typically in seconds range.) ...
... subsequent packets refresh the previous associated reservations en-route outstanding reservations and states automatically time out (i.e., typically in seconds range.) ...
Operating Systems - CTAE Resource Network
... Ask the students to consider why Apple’s products are popular when Windows based computers are available generally at lower prices. This will provide the instructor with the opportunity to lead a discussion concerning customer satisfaction, loyalty, and productivity. ...
... Ask the students to consider why Apple’s products are popular when Windows based computers are available generally at lower prices. This will provide the instructor with the opportunity to lead a discussion concerning customer satisfaction, loyalty, and productivity. ...
Mac OSX Kernel(XNU)
... Traditionally user must write separate kernel code and a logging code to get the data which results in decrease of System performance. ...
... Traditionally user must write separate kernel code and a logging code to get the data which results in decrease of System performance. ...
9. Application/Kernel Interface
... Call the service function in the kernel Linux: array of function pointers indexed by system call number ...
... Call the service function in the kernel Linux: array of function pointers indexed by system call number ...
A Probabilistic Misbehavior Detection Scheme towards
... Malicious and selfish behaviors represent a serious threat against routing in Delay/Disruption Tolerant Networks (DTNs). Due to the unique network characteristics, designing a misbehavior detection scheme in DTN is regarded as a great challenge. In this paper, we propose iTrust, a probabilistic misb ...
... Malicious and selfish behaviors represent a serious threat against routing in Delay/Disruption Tolerant Networks (DTNs). Due to the unique network characteristics, designing a misbehavior detection scheme in DTN is regarded as a great challenge. In this paper, we propose iTrust, a probabilistic misb ...
ch16
... Processors variously called nodes, computers, machines, hosts Site is location of the processor Reasons for distributed systems ...
... Processors variously called nodes, computers, machines, hosts Site is location of the processor Reasons for distributed systems ...
slides - MonALISA
... client’s perspective. Measures network quality, detects faults and informs upper layer services to ...
... client’s perspective. Measures network quality, detects faults and informs upper layer services to ...
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.