15 results about "System virtualization" patented technology

A method and system for replicating data change operations in a virtualized environment are provided. A data change filter in a hypervisor of a virtualization host intercepts data change operations from a virtual machine. A network connection is established between the data change filter and a replication processing service running on a separate replication host. The replication processing service receives the data change operations from the data change filter via the network connection and replicates them to a backup location.

A method of accessing content in a virtualized file system is disclosed. A virtualization API is called to enumerate a list of files within a target directory. The calling of the virtualization API includes bypassing a calling of an operating system API included on a device. The enumeration includes reading from a local data structure on the device. A content data item within a file of the enumerated list of files is determined to be required for an application to perform an operation. A content identifier is determined for the content data item. The content identifier is stored in the local data structure for subsequent access to the content data item.

Methods and systems for managing virtual machines are described herein. A virtualization computing platform may host a plurality of virtual machines comprising. The platform may detect that the first user device is disconnected from the first virtual machine and determine, using a machine learning model, that the first virtual machine, during a time period while the user device is disconnected, is in an idle state. The platform may obtain, based on the determination that the first virtual machine is in the idle state, a snapshot of the first virtual machine and cease hosting the first virtual machine. If the platform receives a request from a second user device associated with the same user account to continuing using the virtual application executed previously by the first virtual machine, the platform may establish a second virtual machine and load, to memory of the second virtual machine, information associated with the snapshot.

A system for operating system virtualization using codebook encoding to improve entropy encoding methods. Training data sets are analyzed to determine occurrence frequency of each sourceblock in the data sets. A mismatch probability estimate is calculated at which any given data sourceblock received will not have a codeword in the codebook. Entropy encoding is used to generate codebooks comprising codewords for sourceblocks based on the frequency of occurrence of each. A “mismatch codeword” is inserted into the codebook to represent those cases when a block of data does not have a codeword.

A system on chip includes an input output (IO) device configured to perform a direct memory access operation on a memory; an access control device configured to search for mapping information between a plurality of virtual identifiers corresponding to the plurality of virtual machines, respectively, and block a direct memory access operation based on a search result; and a host processor configured to provide a target address accessed by the direct memory access operation and a target virtual identifier corresponding to a driving virtual machine driving the IO device to the access control device.

The application provides a server mainboard virtualization capability verification method, system and device and a storage medium. The method comprises the following steps: creating a virtual machine on a system virtualization module of a server host; configuring a test scene; binding physical cores and HT cores of the same CPU core in the same virtual machine; performing CPU stability testing on the bound cores in the virtual machine through test software; identifying the number of CPU cores and performing CPU stability testing on all the CPU cores; collecting test logs; and verifying whether the mainboard supports virtualization capability according to the test logs. The application can effectively verify whether the physical machine mainboard of the server supports virtualization and is stable, and can also verify that the normally tested virtual machine is not affected by the operation of other virtual machines.

The invention provides an interactive drilling system and method for a shipping network security simulation environment, and relates to the field of network security. The simulation environment layer is used for constructing a high-fidelity shipping network simulation environment, integrating a ship communication protocol simulation module and a key service system virtualization module, generating a standardized data stream and simulating a real shipping network operation state; the cooperative control layer is used for supporting parallel operation of multiple roles in a unified virtual environment and executing a preset task based on a task-driven multi-user cooperative platform; attack behaviors and system responses are dynamically generated through a real-time event triggering mechanism, and interactive drilling is achieved; the multiple roles comprise commanders, technicians and red and blue confrontation teams; the interaction feedback layer is used for realizing a real-time event triggering and dynamic feedback mechanism, and dynamically adjusting attack intensity, a response strategy and drilling difficulty according to behavior performance in a drilling process; a drill evaluation report is generated through behavior data analysis, and key indexes are quantified.

A method and system for replicating data change operations in a virtualized environment is provided. A data change filter in a hypervisor of a virtualization host intercepts data change operations from a virtual machine. A network connection is established between the data change filter and a replication processing service executing on a separate replication host. The replication processing service receives the data change operations from the data change filter over the network connection and replicates the data change operations to a backup site.

The invention discloses a three-channel self-adaption and concurrent file transmission method and system of a virtual machine, and belongs to the field of operating system virtualization. Analyzing the characteristics of the file, and selecting one or more transmission channels from a pre-established virtual serial port channel, a network file sharing channel and a TCP / IP network channel based on the characteristics of the file; transmitting the file to the virtual machine based on the selected transmission channels, and when the number of the selected transmission channels is multiple, concurrently executing file transmission; and monitoring a transmission state in a transmission process, and switching to a standby channel when a transmission fault occurs. Through a three-channel adaptive concurrent transmission mechanism, the transmission channel is dynamically selected based on the file characteristics, efficient transmission of the file is realized, and the contradiction between efficiency and reliability in a mixed file transmission scene is solved.

The invention provides a virtual machine replication based on a network. A method and system for replicating data change operations in a virtualized environment is provided. A data change filter in the hypervisor of the virtualized host intercepts data change operations from the virtual machine. A network connection is established between the data change filter and a copy processing service executing on a separate copy host. The replication processing service receives a data change operation from the data change filter over the network connection and replicates the data change operation to a backup site.

Embodiments of the present disclosure include techniques for simulating a circuit, such as a system on a chip (SoC). In various embodiments, the simulated circuit may include one or more processors. However, using a hardware description language (HDL) to emulate circuitry may execute firmware instructions using a virtualized processor, rather than using an HDL to emulate the processor. Certain instructions from the virtualized processor may be sent to the HDL simulation for execution during the simulation.

System and method for creating and managing trusted execution environments (TEEs) using different underlying hardware TEE mechanisms use a virtual secure enclave device which runs in a virtualized environment in a computer system. The device enables an enclave command transmitted to the virtual secure enclave device to be retrieved and parsed to extract an enclave operation to be executed. A TEE backend module is used to interact with a particular hardware TEE mechanism among those available in the computer system. The module ensures the enclave operation for the software process is executed by the particular hardware TEE mechanism, or the TEE scheme based on a particular hardware TEE mechanism.

The present application relates to the technical field of computer system virtualization, in particular to a virtual machine memory virtualization method and system for a Sunway processor. The method manages the reserved continuous physical memory through a virtual memory device, and provides a standard interface to the user state; the virtual machine obtains continuous memory as the guest physical memory through the interface; and then the direct mapping of the guest physical address to the host physical address is established by using the segment mapping of the virtual mode of the Sunway processor. The system comprises corresponding memory pools, driving modules and other components. The scheme realizes near-zero overhead address conversion on the Sunway platform without hardware assistance, and solves the flexible management and efficient sharing of the guest memory across processes through the device interface for the first time.

The application provides a log implementation method in a Hypervisor / virtualization environment, and relates to the technical field of operating system virtualization, and comprises the following steps: outputting a log by operating physical debugging hardware in a starting stage by the Hypervisor, and closing a driver before starting an SOS, and temporarily storing the log in a kernel buffer area of the driver; after transferring all the ownership of the hardware to the SOS, reading and outputting the temporarily-stored log of the Hypervisor by the kernel of the SOS through shared memory; in an early console stage of a UOS, intercepting and converting a hardware access operation of the UOS by the Hypervisor through full virtualization technology, and storing the log in a buffer area; after the early console stage of the UOS, switching to a semi-virtualization channel, and sending the log to a user space back-end process of the SOS. The application solves the problems of log output interruption in a starting process of a virtualization system, early log loss and difficulty in unified collection of multi-source logs, and realizes reliable, real-time and centralized management of the log.

A system-on-chip includes an input output (IO) device configured to perform a direct memory access operation on a memory, an access control device configured to search for mapping information between a plurality of virtual identifiers respectively corresponding to a plurality of virtual machines, and block the direct memory access operation based on the search result, and a host processor configured to provide, to the access control device, a target address accessed by the direct memory access operation and a target virtual identifier corresponding to a driving virtual machine driving the IO device.