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471 results about "Virtual target" patented technology

Online initial mirror synchronization and mirror synchronization verification in storage area networks

Systems and methods in accordance with various disclosed embodiments can manage a mirrored virtual target to synchronize the members of the virtual target and/or to verify that the members of the virtual target are synchronized. In one embodiment, a mirrored virtual target is synchronized by first provisioning at least one first internal virtual logical unit (IVLU) corresponding to at least one destination target of the mirrored target and a second IVLU corresponding to a source target of the mirrored target. A write command is first issued, via one or more internal virtual logical units, to each of the destination target members of the mirrored target. When each destination target is available to receive data, as evidenced by a returned transfer ready signal, a read command is provided to the source target via the second internal virtual logical unit. In this manner, a data path between the source and destination targets is established prior to reading data from the source target. Accordingly, the data can be read from the source target, converted to write data, and routed to the destination targets at line speed without buffering of the data. A similar process is provided to verify that the members of a mirrored target are synchronized. In one embodiment, a system and method is provided to manage incoming commands for the mirrored target while synchronizing or verifying synchronization of the mirrored target. Incoming commands can be queued as they are received and provided to the mirrored target when pending synchronization or verification commands are completed.
Owner:EMC IP HLDG CO LLC

Method for assessing and managing security risk for systems

A method, programmed digital computer and computer program product for assessing and managing security risks in an iterative fashion is provided. The invention is adaptable for use with any system with security targets that are accessible to a security threat. The invention is applicable to all systems with physical, electronic and virtual targets that can be accessed by a threat, thus creating a risk to the system, e.g., systems surrounding hospitals, blood banks, mass transit operations, power production and transmission facilities, communication systems, internet service providers, email and web hosting service providers, electronic commerce, financial institutions and school district lunch programs. Under the invention, if a security threat can access a security target within a system then a risk to the system is present. The invention provides an iterative process by which the system may be analyzed as an undivided whole or may, alternatively, be divided into discrete sections where all known security targets are identified within each section. All threats to each individual target are then identified and it is determined whether each threat has access to the associated target. If access is present, a qualitative or quantitative risk level is assigned. Then, appropriate countermeasures are considered and, where appropriate, implemented if the risk level is unacceptably high. A second inquiry is made regarding whether the particular threat has access to its identified target, considering the implemented countermeasure(s), and a second risk level assignment performed. If the risk level remains high, the process is repeated until the risk level for the subject target is acceptably low. All remaining targets are secured in this manner.
Owner:TRAP IT SECURITY

Remote network attack and defense virtual simulation system based on virtualization and cloud technology

ActiveCN103701777ARealize remote sharingAvoid duplication of investment in constructionTransmissionPrivate networkNetwork connection
The invention provides to a remote network attack and defense virtual simulation system based on virtualization and cloud technology, relates to the field of information safety and experimental system remote sharing, solves the problems of incapability of remotely sharing and building a network topology as well as a onefold attack and defense scene in the conventional network attack and defense virtual simulation system, and provides the remote network attack and defense virtual simulation system. According to the invention, virtualization and cloud technology are used to establish a virtual attacker and a virtual target airplane on cloud storage, network connection equipment and network guard equipment are configured for the virtual attacker and the virtual target airplane, and diversified network topologies and attack and defense scenes are established for users to carry out attack and defense experiment; the system comprises a remote access control module, an experimental configuration module, a virtual attacker cloud module, a virtual target drone cloud module, a monitoring center module, an expansion equipment configuration module and a management center module; users are allowed to use the virtual simulation system remotely through a VPN (Virtual Private Network), repeated investment and construction to the attack and defense virtual simulation system are avoided, and the use ratio of experimental facilities is improved.
Owner:CHANGCHUN UNIV OF SCI & TECH

Adaptative cruise control

An adaptive cruise control system for a motor vehicle includes a forward looking object detecting arrangement for simultaneously detecting several target objects moving in the predicted path and adjacent paths of the equipped vehicle. The detecting arrangement is arranged to continuously monitor velocity and distance to each of the target objects, and a processing arrangement processes signals from the detecting means to provide information of distance to and relative speed of vehicles travelling in front of the equipped vehicle. The processing arrangement repeatedly generates velocity control signals based on the information of distance to and relative speed of vehicles travelling in front of the equipped vehicle. An arrangement controls velocity of the vehicle in response to the control signals from the processing arrangement. The processing arrangement calculates a distance in time from the equipped vehicle to a virtual target vehicle, the distance to and velocity of the virtual target vehicle being calculated on basis of the number of vehicles in the group, the spread in distance of the group, and thus the vehicle density of the group, and the variability of positions in the group, such that the algorithm of the processing means decides from the above parameters on the allowed deviations in time distance, wherein the processing arrangement is arranged to produce a signal to the velocity control arrangement based on the calculated distance in time between the equipped vehicle and the virtual vehicle.
Owner:VOLVO LASTVAGNAR AB

Reactive deadlock management in storage area networks

Systems and methods in accordance with various embodiments can detect and alleviate potential or actual deadlock of a storage switch or storage area network when attempting to write data to a mirrored virtual target. In accordance with one embodiment, a timer is started when a storage switch routes a write command to the physical targets corresponding to a virtual target of the write command. If each physical target does not return a transfer ready resource within a predetermined timeout period, the switch determines that a potential or actual deadlock has occurred. An abort command is sent to each of the physical devices. The abort command can clear the command from the targets and also free any allocated transfer ready resources. After receiving an acceptance response from each physical target, the state of the write command at the switch can be cleared. The write command can then be re-issued to the physical devices. In one embodiment, a queue depth for the virtual target can be lowered after failing to receive transfer ready resources from each target. By decreasing the queue depth, the maximum number of commands the switch will process for a virtual target is decreased to decrease the probability of future deadlock. In one embodiment, the queue depth is increased after no deadlock is detected for a period of time.
Owner:EMC IP HLDG CO LLC
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