138results about How to "Reduce visit frequency" patented technology

A control apparatus provides a transfer instruction to one of storage apparatus and a cache apparatus, in which relevant data is stored, when receiving an access request from a client apparatus for the data for which the storage location is managed; and the one of the storage apparatus and the cache apparatus receiving the transfer instruction directly returns a reply message, to the client apparatus, having information of the storage location of the data added thereto, which data the access request requests.

A system and computer system for improving data integrity and memory performance using non-volatile media. A system includes a non-volatile mass storage unit, e.g., a flash memory device and/or a hard drive unit for instance. A memory device is used as a high speed data buffer and/or cache for the non-volatile storage unit. The memory device may be non-volatile, e.g., magnetic random access memory (MRAM) or volatile memory, e.g., synchronous dynamic random access memory (SDRAM). By buffering and/or caching the write data, fewer accesses are required to the mass storage device thereby increasing system performance. Additionally, mechanical and electrical degradation of the mass storage device is reduced. Certain trigger events can be programmed to cause data from the memory device to be written to the mass storage device. In one embodiment, the write buffer contents are preserved across reset or power loss events. In one embodiment, the mass storage unit may be a data transport layer, e.g., Ethernet, USB, Bluetooth, etc.

The invention provides a data online hierarchical storage method in a cluster storage system. Data has a life cycle, and particularly has different meanings in different periods; a cluster storage system stores mass data; however, only 20% of the mass data is key data at high access frequency, and 80% of the mass data is non-key data at low access frequency that the non-key data is generally not accessed in one month or even one year; and the mass data stored in the cluster storage system is classified for storage according to the data access frequency and the characteristic that data has a life cycle so as to save the storage cost. According to the invention, different storage pools are established in the cluster storage system based on the life cycle of data, online hierarchical storage in the cluster storage system is realized by use of scanning software and migration software, thereby saving the storage cost and improving the overall performance of the system.

The invention relates to a cache method for a file system with changeable data block length, belonging to the technical field of computer data storage. The method of the invention comprises the following steps: intercepting operating commands from a computer application program by a driving module of a user state file system, wherein the operating commands comprises opening the existing files, reading data from the opened files, writing data into the opened files, modifying the file attributes and closing the opened files; operating a cache management module in a daemon process mode; and temporarily saving partial data which is read and written recently in each currently opened file into data blocks with random length in the internal storage of a computer, thereby reducing the frequency of access of the file system to external storage devices, and improving the efficiency and throughput of accessing data in the file system. The method of the invention can enable the data reconstruction and data segmenting processes to be transparent to the user and computer application programs, thereby enabling the file system to support a repeating data deleting function under the condition that the compatibility is not affected, and effectively improving the utilization efficiency of the physical storage space.

A Z culling method, a three-dimensional graphics processing method using Z-culling, and an apparatus thereof are provided. The Z-culling method includes the following steps. A Z cache memory is provided to buffer a cover mask and a dynamic maximum depth value corresponding to each tile. A draw mask, a draw maximum depth value, and a draw minimum depth value calculated according to the tile and a drawn part are obtained. Moreover, whether the drawn part is completely included in a known part of the cover mask is judged, and coordinated with a comparison of the draw minimum depth value and the dynamic maximum depth value, so as to determine whether to discard the drawn part and whether to update the cover mask and the dynamic maximum depth value in the Z cache memory. Accordingly, the bandwidth taken up in the system memory is reduced efficiently.

The invention discloses an indexing method applied to time sequence historical database, which is used for realizing the high-efficiency storage and retrieval of the time sequence historical database. According to the indexing method, the time point is taken as a keyword to establish multi-tree indexes, and the indexes can be orderly stored in an index file in a disc according to the time sequence, and the time sequence historical database can be orderly stored in the data file in a disc according to the time sequence. During data access, the access frequency of files can be reduced through batching memory mapping file mechanisms, so that the data storage and retrieval efficiency of the time sequence historical database can be ensured, and moreover, the consumption on memory resources is small.

In a method, system and apparatus for management of dynamic memory in battery-powered devices, information is stored in dynamic memory, such as SDRAM chips. Chip partitioning minimizes the number of chips requiring power, minimum refresh rates reduce the power needed to maintain information, and a threshold for determining when to power down a battery powered device are used to maximize battery life.

The invention provides a data storage method and apparatus. The method comprises the steps of obtaining a to-be-stored first data file and a first LUN identifier corresponding to the first data file;according to first cluster view information, determining multiple first OSDs corresponding to the first LUN identifier, wherein the first cluster view information comprises a corresponding relationship between the first LUN identifier and the first OSDs; splitting the first data file into multiple data blocks, determining the first OSDs corresponding to the data blocks, and sending the data blocksto the corresponding first OSDs, thereby enabling the first OSDs to store the data blocks; and storing metadata corresponding to the first data file in a monitoring server. Through the technical scheme, the metadata quantity is greatly reduced; the metadata access frequency and quantity are reduced; the cluster access performance is improved; and storage resources occupied by the metadata are saved. Meanwhile, an expansion scheme based on zero data migration of a cluster view version is provided, so that the influence of the cluster expansion process on the system performance is reduced.

The invention provides a storage and retrieval method and system for large-scale geographic space data. The method comprises the following steps: mapping geographic space data to a tile pyramid model,filling a tile pyramid by using a space filling curve, and carrying out coded expression on tile nodes on the space filling curve to construct a space continuous index coding structure; constructinga multi-dimensional structured storage model which comprises a tile data table and a secondary index table, storing geographic space tile data, basic information of the geographic space tile data andtile data keys into the tile data table, and storing tile index keys and tile index values into the secondary index table; and generating a data query filter for data set retrieval according to the retrieval conditions of the data and the correlation between each dimension and the data storage structure. The multi-dimensional retrieval method and the quick query process of the geographic space data are realized, the access frequency of the database is reduced, and the access speed of the data is increased.

The invention provides an online charging method, an online charging device and an online charging system. The online charging method comprises the following steps of: rating according to a request amount of a user and reserves the rating on an intermediate account; deducting fee from the intermediate account according to the using amount of the user; and initiating a balance change request to a balance management center according to the fee deduction condition of the intermediate account after a user activates the account. Due to the adoption of the online charging method, all dynamic information of related account of the user is imaged to the intermediate account of a CBS by creating the intermediate account in the CBS, and the service under the activation of the user is subjected to reservation and fee deduction processing on the intermediate account, so access frequency of an ABM is reduced, interaction with the ABM during each charging process is avoided, communication links are shortened, and the terminal-to-terminal charging performance is improved.

In order to reduce a period of time required for a database operation and maintenance job, provided is a database management method in a database management apparatus that manages a database stored in a storage apparatus including: executing load processing of storing data which is read from the storage apparatus in a memory; executing job processing by reading and writing the data which is stored in the memory; executing unload processing of writing the data which is stored in the memory in the storage apparatus; and executing maintenance processing for the database using the data which is stored in the memory at timing for executing at least one of the load processing and the unload processing.

The invention is suitable for the technical field of optical disc storage and provides a repeating data deleting system based on optical disc storage as well as a data operating method and a data operating device. The system comprises high-speed storage equipment, an internal memory, a processor and an optical disc cabinet. The data operating method comprises a data backup method and a data reducing method, wherein in the data backup method, caching a data block into a buffer region, storing the data block into the optical disc in batch while the data block buffer amount reaches the capacity of an optical disc; in the data restoration method, through a file directory stored in the buffer region, caching the optical disc into the buffer region in total, obtaining and integrating the file data block. By sufficiently utilizing the optical disc storage characteristics, optical disc reading-writing times can be reduced to a very great extent, so that the repeating data deleting system based on optical disc storage is realized.

The invention discloses a kernel code soft fault tolerance method for hardware unrecoverable memory faults. The method comprises the following implementation steps of: 1) when an operating system loads the kernel codes to a physical memory, marking the kernel codes as main codes, setting multiple code copies for each segment of kernel codes, and loading the copies into the physical memory; 2) when the operating system runs, if the memory of the kernel codes is in memory exceptions, locating an error kernel page of the current main codes, comparing the error kernel page codes with the code copies, if errors of the codes of the error kernel page is determined, suspending the running of a computer, modifying a kernel code page table of the error kernel page, selecting a regular code copy from the code copies corresponding to the current main codes to substitute the current main codes, and then, keeping on running the computer. The method can improve the running stability of the operating system, enhance the reliability of a kernel module, reducing the possibility of error in the memory and reducing the interference of memory fault on the running of the operating system.

The invention discloses an all-purpose asynchronous serial communication controller. The controller comprises a bidirectional IO processing module, a PCI secondary controller, an interior bus interface, interrupt management, and 1 to 8 channels UART control module, wherein the bidirectional IO processing module is used for connecting an exterior bus signal with a signal of the PCI secondary controller and merging the corresponding input output signals of the PCI secondary controller into a bidirectional signal of the PCI bus. The application coverage of the invention is wider than the controller of four channels. The depth for transceiving FIFO of each UART channel is 512 bytes and the processor access frequency is at least reduced by 4 times of the industrial controller. The controller supports sharing the 485 bus communication and receiving the enable control and is flexible to use. The processor interface is PCI bus, the integrated level is high which is beneficial to integrate a system, and the data throughput rate is high, and the highest data throughput rate reaches to 132MB/s.

The invention discloses a method and a system for reducing garbage collection and write amplification of a key-value separation storage system, and belongs to the field of computer storage, the systemcomprises a memory, an NVM and an SSD; and a first storage area and a second storage area in the NVM manage data according to an LSM-tree and a memory pool respectively; the method comprises the steps of judging whether the size of a to-be-inserted key value pair is greater than or equal to a first threshold value or not, if so, inserting the key value pair into the second storage area, and theninserting a key and a key value address into LSM-tree; otherwise, directly inserting the key value pair into LSM-tree; when the key value pair in the memory pool is deleted, marking the correspondingstorage unit as an idle memory unit; when the data volume in the second storage area is higher than a second threshold value, brushing down the key value pair with the least frequent access to the SSD, and updating the storage address of the key value pair; and setting a flag bit segment on the NVM, and identifying the validity of the key value pair of the data segment on the SSD. Garbage collection and write amplification of the key value storage system can be reduced, and the overall performance of the key value separation storage system is improved.

The invention discloses a system for browser interface data refreshing controlled by a server. The system is characterized by comprising a message push management module adopting the COMET technology, a long connection processing module and a long polling processing module, wherein the message push management module is used for storing attributes and control modes of long connection and long polling related with browser interface data requests, the long connection processing module is used for operations of closing and restoring of the long connection according to states of the server and grades of the long connection, and the long polling processing module is used for regularly sending polling requests to the server to detect response time of the server and judge running states of the server. The system can randomly adjust the grades of the long connection, retain connection of important data and lower access frequency of low-grade links.

An electronic device and a method for starting up the same, wherein the electronic device includes a firmware control unit, a power supply state storage unit, a basic input output unit, and an Ethernet interface coupled to power supply apparatus to a Power over Ethernet to receive a power supply via a network cable. The firmware control unit determines whether the power supply state of the power supply is in a first power mode, by checking a power supply state signal. When the power supply state is not in the first power mode, the basic input output unit executes a second power booting program. The firmware control unit communicates with the power supply apparatus via a network, increases the rated power of the power supply, sets the power supply state signal for controlling the power supply state to be in the first power mode, and restarts the electronic device.

At an upload time, each of multiple printers connecting with a network identifies storage or non-storage of any unsent monitor information file, which has not yet been sent to a management server. In the case of storage of any unsent monitor information file, the printer collects from the other printers unsent monitor information files, which are stored in the other printers and have not yet been sent to the management server, and uploads the collected monitor information files and the unsent monitor information file stored in the self printer to the management server. This arrangement effectively reduces the access frequency from the respective printers to the management server for transmission of monitor information files from the printers to the management server.

The invention provides a distributed file system metadata management method. By separating the read-only operation and the modification operation of a metadata server, disc access frequency caused by read-only operation I/O of metadata at an MOS (management operating system) end is reduced, and the performance of data modification operation at the MOS end is improved; by mapping the metadata hash on different MPSs (microprocessor system), the cache hit ratio of the MPSs is improved, and the performances of the metadata server is further improved. Moreover, access of a client and the MPSs to the metadata is shielded when the metadata are modified by theMOSs, and the isolation of the modification operation on the metadata is guaranteed.