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111results about How to "Efficient scanning" patented technology

System and method for determining changes in two snapshots and for transmitting changes to destination snapshot

A system and method for remote asynchronous replication or mirroring of changes in a source file system snapshot in a destination replica file system using a scan (via a scanner) of the blocks that make up two versions of a snapshot of the source file system, which identifies changed blocks in the respective snapshot files based upon differences in volume block numbers identified in a scan of the logical file block index of each snapshot. Trees of blocks associated with the files are traversed, bypassing unchanged pointers between versions and walking down to identify the changes in the hierarchy of the tree. These changes are transmitted to the destination mirror or replicated snapshot. This technique allows regular files, directories, inodes and any other hierarchical structure to be efficiently scanned to determine differences between versions thereof. The changes in the files and directories are transmitted over the network for update of the replicated destination snapshot in an asynchronous (lazy write) manner. The changes are described in an extensible, system-independent data stream format layered under a network transport protocol. At the destination, source changes are used to update the destination snapshot. Any deleted or modified inodes already on the destination are moved to a temporary or “purgatory” directory and, if reused, are relinked to the rebuilt replicated snapshot directory. The source file system snapshots can be representative of a volume sub-organization, such as a qtree.
Owner:NETWORK APPLIANCE INC

Apparatus and method for processing magnetic particles

An apparatus and method for carrying out the affinity separation of a target substance from a liquid test medium by mixing magnetic particles having surface immobilized ligand or receptor within the test medium to promote an affinity binding reaction between the ligand and the target substance. The test medium with the magnetic particles in a suitable container is removably mounted in an apparatus that creates a magnetic field gradient in the test medium. This magnetic gradient is used to induce the magnetic particles to move, thereby effecting mixing. The mixing is achieved either by movement of a magnet relative to a stationary container or movement of the container relative to a stationary magnet. In either case, the magnetic particles experience a continuous angular position change with the magnet. Concurrently with the relative angular movement between the magnet and the magnetic particles, the magnet is also moved along the length of the container causing the magnetic field gradient to sweep the entire length of the container. After the desired time, sufficient for the affinity reaction to occur, movement of the magnetic gradient is ended, whereby the magnetic particles are immobilized on the inside wall of the container nearest to the magnetic source. The remaining test medium is removed while the magnetic particles are retained on the wall of the container. The test medium or the particles may then be subjected to further processing.
Owner:SIGRIS RES

System and method for determining changes in two snapshots and for transmitting changes to a destination snapshot

A system and method for remote asynchronous replication or mirroring of changes in a source file system snapshot in a destination replica file system using a scan (via a scanner) of the blocks that make up two versions of a snapshot of the source file system, which identifies changed blocks in the respective snapshot files based upon differences in volume block numbers identified in a scan of the logical file block index of each snapshot. Trees of blocks associated with the files are traversed, bypassing unchanged pointers between versions and walking down to identify the changes in the hierarchy of the tree. These changes are transmitted to the destination mirror or replicated snapshot. This technique allows regular files, directories, inodes and any other hierarchical structure to be efficiently scanned to determine differences between versions thereof. The changes in the files and directories are transmitted over the network for update of the replicated destination snapshot in an asynchronous (lazy write) manner. The changes are described in an extensible, system-independent data stream format layered under a network transport protocol. At the destination, source changes are used to update the destination snapshot. Any deleted or modified inodes already on the destination are moved to a temporary or “purgatory” directory and, if reused, are relinked to the rebuilt replicated snapshot directory. The source file system snapshots can be representative of a volume sub-organization, such as a qtree.
Owner:NETWORK APPLIANCE INC

Liquid crystal light beam deflection and scanning device as well as method

The invention discloses a liquid crystal light beam deflection and scanning device. The device comprises a wedged liquid crystal box, a liquid crystal polymer polarization grating and adjustable liquid crystal half-wavelength plate combination and a quarter-wave plate, wherein a liquid crystal layer is arranged between two oppositely arranged base plates of the wedged liquid crystal box; light-alignment films with molecules pointing to the vector direction and uniformly distributed are arranged on the sides, adjacent to the liquid crystal layer, of the two base plates, and molecules on the liquid crystal layer are uniformly distributed and in parallel with the first base plate; the liquid crystal polymer polarization grating and adjustable liquid crystal half-wavelength plate combination is provided with two parallel base plates, a liquid crystal layer and liquid crystal polymers, the light-alignment films with molecules pointing to the vector direction and uniformly distributed are arranged on the sides, adjacent to the liquid crystal layer, of the two base plates, and light-alignment films with molecules pointing to the vector direction and gradually changing periodically are arranged on the sides, adjacent to the liquid crystal polymer layer of the two base plates; the quarter-wave plate is used for converting linearly polarized light into circularly polarized light. Continuous light beam deflection and scanning in a large angle range can be realized by means of the liquid crystal light beam deflection and scanning device.
Owner:南京晶萃光学科技有限公司
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