摘要:
Provided are a method and a system for processing an access to a disk block. The system receives a disk block access request from an OS domain, determines whether the OS domain is permitted to access a disk block with reference to a predetermined block table and processes disk block access of the OS domain according to the determination result. Accordingly, OS domains can share caches without having data copy through memory access control in a virtual machine monitor environment. Furthermore, a device domain controls access to a disk drive so that data corruption can be prevented.
摘要:
A data transmission method and apparatus encodes data to be transmitted over a wireless network on a unit basis, and provides the transmission data with information for allowing the transmission data to recover from an error being added thereto, transmits the transmission data to the wireless network, calculates a transfer success ratio depending on whether the transmission data have been successfully transmitted, and controls the transmission of the transmission data depending on whether the transfer success ratio is higher than a threshold value.
摘要:
A virtualization apparatus is provided. The virtualization apparatus includes a plurality of virtual machines configured to have priority levels, a memory pool configured to be shared between the plurality of virtual machines and store part of data stored in a system memory of each of the plurality of virtual machines, and a memory pool manager configured to process a memory allocation request or a data storage request regarding the memory pool in consideration of the priority levels of the plurality of virtual machines, a guaranteed memory size for each of the plurality of virtual machines, and a size of memory that can be allocated to each of the plurality of virtual machines.
摘要:
A virtualization apparatus is provided. The virtualization apparatus includes a plurality of virtual machines (VMs), a process scheduler configured to schedule processes to be executed on the respective virtual machines, a virtual machine monitor (VMM) configured to provide each of the virtual machine with a virtualized execution environment, a virtual machine scheduler configured to schedule the virtual machines to run in the virtual machine monitor, and a synchronization unit configured to synchronize a process schedule time which is scheduled by the process scheduler and a virtual machine schedule time which is scheduled by the virtual machine scheduler, or to change the virtual machine schedule time in consideration of the process schedule time.
摘要:
An apparatus and method for controlling a resource utilization policy in a virtual environment are provided. The apparatus may increase network throughput by dynamically adjusting the resource utilization policies of a driver domain that can directly access a shared device, and a guest driver that cannot directly access the shared device. In addition, the apparatus may improve the efficiency of the use of CPU resources by appropriately adjusting the CPU occupancy rates of the driver and guest domains.
摘要:
A fault restoration technique for use in a virtual environment is provided. The fault restoration technique includes monitoring fault state values of a plurality of domains, detecting a faulty domain, if any, from the plurality of, and restoring the faulty domain by reloading the OS of the faulty domain.
摘要:
A virtualization apparatus and method for providing a transactional input/output interface to prevent input/output performance from deteriorating are provided. The virtualization apparatus includes hardware, a virtual machine monitor to support a plurality of operating systems to use the hardware, and a transaction device driver that executes transactions for hardware I/O operation and to provide an interface for executing a transaction for input/output operations to/from the hardware.
摘要:
A method and apparatus for controlling parameters of a wireless data streaming system are provided. The method of controlling parameters of a wireless data streaming system includes controlling first parameters, which can be controlled in units of individual packets, according to a current packet transmission state in a data stream; transmitting a predefined number of packets using the first parameters and obtaining statistical information regarding use of the first parameters in the transmission of the predefined number of packets; and controlling second parameters, which can be controlled in units of packet groups, with reference to the statistical information and a desired quality of service (QoS).
摘要:
An apparatus and method for transmitting a multimedia data stream are provided. The apparatus includes a data source unit to output the data stream; a frame dividing unit to divide the data stream according to a type of a video frame included in the data stream and to output the divided data stream; a parameter control unit to select a parameter set for separate transmission control of the divided data stream using parameters for controlling a transmission layer; and a network interface unit to control transmission of the divided data stream using the parameter set. The method includes dividing the data stream according to a type of a video frame; selecting a parameter set for separate transmission control of the divided data stream; and controlling transmission of the divided data stream using the selected parameter set.
摘要:
An apparatus and method for managing process migration are provided. When a process of a source virtual machine is to be migrated to a target virtual machine based on a process migration request, and the source virtual machine and the target virtual machine are on the same operating system (OS), logical migration is performed by updating information included in a virtual machine information database and a namespace router table.