182 results about "Copying Processes" patented technology

High availability (HA) protection is provided for an executing virtual machine. At a checkpoint in the HA process, the active server suspends the virtual machine; and the active server copies dirty memory pages to a buffer. During the suspension of the virtual machine on the active host server, dirty memory pages are copied to a ring buffer. A copy process copies the dirty pages to a first location in the buffer. At a predetermined benchmark or threshold, a transmission process can begin. The transmission process can read data out of the buffer at a second location to send to the standby host. Both the copy and transmission processes can operate substantially simultaneously on the ring buffer. As such, the ring buffer cannot overflow because the transmission process continues to empty the ring buffer as the copy process continues. This arrangement allows for smaller buffers and prevents buffer overflows.

This invention is a system and method for managing replication of data in a data storage environment by grouping logical devices. The system is enabled for configuring, monitoring, and controlling replication processes in accordance with a replication policy that is particularly useful when combined with grouping of logical devices used in replication. The invention is useful for replicating essentially an entire copy of a production-level database such that the copy may be used essentially as the production-level database itself.

The on-chip copy process is extended so that the data may be copied between two blocks that may be on different chips, different planes on the same chip, or the same plane of the same chip. More specifically, the methods described here provide a single data copying mechanism that allows data to be copied between any two locations in a memory system. An exemplary embodiment uses an EDO-type timing. According to another aspect, selected portions of the relocated data, such as chosen words in a transferred page, can be updated in the controller on the fly. In addition to transferring a data set directly from a read buffer of a source array to a write buffer of a destination array, the data set can concurrently be copied, if desired, into the controller where an error detection and correction operation can be performed on it.

A disaster recovery system and a method therefor, having: a function for receiving write requests from a host computer to write log information indicating the contents of a database process executed for a database buffer on a main site, database data updated on the database buffer and status information indicating the position of log information used for disaster recovery; a function for transferring the received write request for log information to a recovery site by a synchronous remote copy process; and a function for transferring the received write request for database data to the recovery site by an asynchronous remote copy process. While remote copy can be executed at a long distance without data loss, the deterioration of the performance of a database process on a main site can be suppressed.

Methods and apparatuses for protecting against copying of content recorded on optical recording media are provided. An area of an optical recording medium is designated to be ignored by a standards-compliant optical media player reproducing content recorded on the optical recording medium. Unreadable data is written to the designated area which is ignored by the standard-compliant optical media player. When an optical medium drive attempts to read the unreadable data in order to perform a one-to-one copy process on data recorded on the recording medium, the optical medium drive is unable to complete the one-to-one copy process.

A method, system, and medium for replicating data stored on a storage array is provided. Source data, which may change during the copy process, is copied to a target device. The source data is checked to determine whether any changes were made to the data. If so, the respective data bin is copied to the target component.

The invention provides a long-distance duplicating system and a long-distance duplicating method. The method comprises the following steps that: when sending backup data to a long-distance duplicating receiving end, a long-distance duplicating sending end only sends log data, which are changed at the current duplicating transmission time point relative to the previous duplicating transmission time point, of the long-distance duplicating sending end to the long-distance duplicating receiving end; and the long-distance duplicating receiving end calculates the log data at the current duplicating transmission time point of the long-distance duplicating sending end according to the changed log data as well as the log data, calculated by the long-distance duplicating receiving end last time, of the long-distance duplicating sending end, and reconstructs metadata according to the calculated log data. By the method, the data transmitted by network in the long-distance duplicating process can be reduced substantially to realize the precision and high efficiency of the transmission.

The invention discloses a flash memory storage system and a reading, writing and deleting method thereof. The flash memory storage system comprises a cache, a main control module, a cache metadata record sheet, a read mapping table and a write mapping table. The write mapping table is used for being stored in the cache and writing in the correspondence of a logical storage block and a physical storage block. The read mapping table is used for being stored in the cache and reading out the correspondence of the logical storage block and the physical storage block. The cache metadata record sheet is used for storing correspondences of metadata sheet addresses, the physical storage blocks and rear end flash memory addresses. By means of the flash memory storage system, the unnecessary write-in or read-out of a rear end flash memory can be reduced, the zero copy on a read-write data channel is achieved, the unnecessary intermediate copy process is omitted, and therefore the read-write efficiency is improved; the size of the read-write access of a front end application can be matched with the size of the rear end flash memory.

The invention discloses an online data migration method, which is used for solving the technical problems of low efficiency and low universality of the conventional data migration method. The technical scheme comprises the following steps of: copying data in a logic unit number (LUN) of a source logic unit into the LUN of a target logic unit, and continuously running a system and a service in a data migration process; simultaneously copying the data updated into the LUN of the source logic unit into the LUN of the target logic unit in the migration process; simultaneously reflecting updating and copying processes by using a single bitmap mapping table; and after the data migration process is finished, using and updating used equipment at any time, and deleting the used equipment. The system and the service are continuously run in the data migration process, so the data migration efficiency and the data migration universality are improved.

A computer system implements hot mirroring for main system memory. That is, the computer system permits a user to hot plug a new memory board into the system and the system will respond by switching to a mirrored memory mode in which write cycles are performed to both memory boards (new and old). Once a new board is hot plugged into the system, the contents of the old board are copied over, in a background mode, to the new board so that both boards will have the same data. Because this background copying process may take a non-trivial amount of time and may detrimentally interfere with other system traffic, the system a user to exert control over the relative speed of the background copying so as to trade-off the time it takes to switch over to the mirroring mode versus the impact on on-going system behavior.

In general, techniques are described for performing an intra block copying process to code video data. A video decoding device that includes a memory and one or more processors may perform the techniques. The memory may be configured to store a current block of a picture. The processors may be configured to perform an intra block copying process to decode the current block using a prediction block that is from a same slice or a same tile as that in which the coded current block resides, the prediction block restricted to be within a search region that only includes the same slice or the same tile as that in which the coded current block resides.

A data collection program collects data from a user's workstation and captures the user environment data, including user settings and program application data. The user environment data is stored on a removable nonvolatile storage media for duplication processing. The stored user environment data is processed by a duplication process to duplicate the user environment data from the old workstation onto a new workstation or for recovery from a catastrophic system failure. A variety of user environment settings, not traditionally captured and restored by traditional backup software, are captured and restored. For example, licensing information and application personality data is identified, stored, and recovered along with other user-specific information such as hostnames, IP addresses, and the like.

The invention relates to the computer technology, in particular to a DNS (domain name system) service system and method based on a Linux operation system. In the embodiment of the invention, a DNS service processing module is placed in the data link layer of a kernel; a data frame processing module is used for receiving a DNS request message forwarded by a network card driving module, storing theDNS request message in a memory, and calling a DNS service processing module of the kernel to process the DNS request message; and the DNS service processing module is used for generating a DNS response message, storing the DNS response message into another memory, and calling the data frame processing module to read the DNS response message to the memory from the another memory, add the DNS response message to the transmission queue and transmit the DNS response message to a client. The data frame processing module and the DNS service processing module are located in the data link layer of the kernel so as to obviate the processing of other kernel modules and obviate the two copy processes from the kernel to the application layer and from the application layer to the kernel layer, thereby improving the DNS service processing efficiency.

A data storage control unit is coupled to one or more host devices and to one or more physical storage units. Data is stored in one of the storage units and, for data integrity, copied to another storage unit. An updated state of the copy process (metadata) is maintained and updated in metadata tracks in a memory of the storage controller and periodically destaged to corresponding metadata tracks of a storage unit. If the copy process is interrupted, such as by a power failure, an error handling routine commences. Track state fields associated with each in-memory metadata track are initialized to an ‘invalid’ state and background staging of metadata tracks from the storage unit to the memory. After a track is staged, the associated track state field is changed to a ‘valid’ state. If a request is received to access a track of copy state data and the track has been staged (as indicated by the state of the associated track state field), the track is accessed. If the requested track has not been staged, requester waits while the requested track is staged; then the requested track is accessed. Once the error handling routine is completed, normal I/O operations with customer data may resume. Preferably, completion of the error handling routine is independent of the completion of the staging of copy state data tracks.

A method for servicing a redundant array of independent storage drives (i.e., RAID) includes performing a service call on the RAID by performing the following steps: (1) determining whether the RAID includes one or more consumed spare storage drives; (2) in the event the RAID includes one or more consumed spare storage drives, physically replacing the one or more consumed spare storage drive with one or more non-consumed spare storage drives; and (3) initiating a copy process that copies data from a storage drive that is predicted to fail to a non-consumed spare storage drive associated with the RAID. The service call may then be terminated. After the service call is terminated, the method waits for an indication that a number of non-consumed spare storage drives in the RAID has fallen below a selected threshold. A corresponding apparatus and computer program product are also disclosed.

The invention describes a process to prevent counterfeiting or alteration of a printed or engraved surface, characterized by the incorporation of a signature of the form of a digital mark into parts or the entire document, and in particular a digital mark technology to hide information in an invisible way through over-printing by using a method called asymmetric amplitude modulation. This method can be applied to any type of printed material such paper, packaging, or any other surface. Visible information can also be printed over the digital mark. As an application example, applied to a paper document the digital mark can be used to guarantee the document authenticity, as it would be destroyed by a copy process.

The invention discloses a caching system capable of supporting zero copy on the basis of a flash memory array, and a method. The system comprises a main control module, a physical caching module, a read address and write address conversion module, an idle block management module, a metadata recording table and a rear side flash memory module. The method comprises the following the following steps that: receiving a command request sent from a front side, converting a logic block number in the command request into a corresponding physical block number, carrying out a Hash operation on a rear-side address in the command request to obtain a corresponding metadata address index; according to the metadata address index, inquiring a metadata state table and a metadata record chart, processing the data of a corresponding table item in the metadata record chart according to the state information of the corresponding table item of the state table, and updating the corresponding table item of the metadata state table, and updating a mapping table in the read address and write address conversion module; and returning a completion command to the front side. By use of the system, a contradiction that the read-write access size of a traditional cache and a flash memory page size are not matched is solved, meanwhile, the zero copy on a caching read-write data path is realized, an unnecessary middle copy process is eliminated, cache read-write efficiency is improved, meanwhile, erasing for Flash can be reduced, and the service life of the Flash is prolonged.

The invention discloses a method and a device for copying information after table structure modification. The method comprises the following steps: extracting source-end DDL (Data Definition Language) statements corresponding to structure modification of a source table when the structure of the source table in a source-end database varies; and modifying the structure of a target table in a target-end database to be the same as the structure of the source table according to the source-end DDL statements. Thus, the table structure modification can be copied automatically without pausing or interrupting a data copying process, so that artificial participation is reduced, and project implementation and maintenance cost is lowered.

A system and method for detecting whether a video signal is modified by a video-tape-recorder-design based anti-copying process. A proper portion of the video signal is identified and filtered, and potential anti-copying artifacts in the filtered signal are counted by comparing the filtered output against a threshold derived from the video-tape-recorder-design based anti-copying process. By cross-correlating the number of potential anti-copying artifacts, found on multiple scan lines across multiple frames, with an expected minimum range and/or number of anti-copying artifacts derived from the video-tape-recorder-design based anti-copying process, anti-copying modifications of the video signal are detected. In this fashion, traditional video-tape-recorder-design based anti-copying processes are applied to modem digital video recording systems.

A system and method for lun migration between data containers, such as aggregates of a storage system is provided. A new destination lun is created on a destination aggregate. A background copy process is then started that copies all data from a source lun on a source aggregate to the destination lun. The storage system continues to process client-originated data access requests directed to the source lun while the background copying continues. Once all the data of the source lun has been copied to the destination lun, processing of data access requests to the lun(s) is quiesced by the storage system. Lun maps of the storage system are then updated and processing of the client-originated data access requests is resumed with those requests now being directed to the destination lun.