146results about How to "Reduce the number of writes" patented technology

The invention provides a high-performance reliable solid-state disk realizing method. The method includes: (1), dividing all flash memory chips in a solid-state disk into groups and forming an RAID (redundant array of independent disks) 4-level flash array in each group by N successive flash chips; (2), receiving and storing data through a cache; (3), judging whether the cache is filled up or not, if yes, entering the step (4), and if not, returning to the step (2); (4), extracting N-1 data blocks from the cache and computing check values of the N-1 data blocks; making up the N-1 data blocks and the check values into filled stripe data and writing back the flash array; returning to the step (2). The flash chips in the solid-state disk are used for establishing the RAID4-level physical array to assure data reliability. Faults at different levels including page level, block level, or even chip level can be processed. Besides, writing-in performance is improved by writing of filled stripes and sequence, and spatial and performance loss resulted from data errors can be reduced to the utmost.

The invention discloses a caching method and a caching device. The caching method comprises the steps of determining a to-be-deleted data block needing to be deleted from an NV (Non-volatile) storage medium in a caching space according to the access situation of data blocks; selecting and deleting the to-be-deleted data block from the NV storage medium according to a preset data recovery condition. According to the caching method and the caching device, which are disclosed by the invention, the writing times of an NV storage device which is unbalanced in writing and poorer in duration can be reduced, and the service life of the NV storage device can be prolonged.

The invention relates to the technical field of electronics, in particular to a method, device and system for data storage. The method, device and system for data storage are used for solving the problems that a storage device is low in writing performance and short in service life. The data storage method provided by the embodiment includes the steps that a storage controller receives data to be stored and is internally provided with a first cache and a second cache, the first cache is used for caching the first type of data, the second cache is used for caching the second type of data, and the updating frequency of the first type of data is larger than that of the second type of data; the storage controller recognizes the first type of data in the data to be stored and writes the recognized first type of data into the first cache; if the first type of data written in comprise updated data, the data, which correspond to the updated data and are not updated yet, in the first cache are set to be invalid; when the storage controller determines that the writing-in triggering condition of the first type of data is met currently, the valid data in the first cache are written into a storage medium.

The invention discloses a shared storage message queue-based implementation method for high availability of virtual machines and relates to the field of cloud computing. The shared storage message queue-based implementation method for the high availability of the virtual machines comprises the following steps: initializing a piece of contiguous space on shared storage by a server program to serve as a logical volume; distributing a plurality of contiguous sectors from the logical volume to serve as a sector pool of a client program; acquiring the configuration information of the sector pool and the number of a virtual machine, of which the high availability is enabled, by the client program; sending a heartbeat message by the client program, and updating the timestamp of a virtual machine control block maintained by the client program; receiving the heartbeat message by the server program, and updating the timestamp of the virtual machine control block maintained by the server program by utilizing the timestamp carried in the heartbeat message. According to the shared storage message queue-based implementation method disclosed by the invention, the unnecessary stop time of the virtual machines is avoided; system resource consumption is low by adopting a heartbeat detection mechanism; the performance is high; the service life of the disk of the shared storage is prolonged.

The invention discloses a disk array caching method for a virtual SSD and an SSD isomerous mirror image. The disk array caching method comprises the steps that a disk is logically divided into two parts, wherein the upper half part forms an RAID0 or RAID5 structure to serve as the virtual SSD so as to back up dirty data in a real SSD, the virtual SSD is in a log writing mode, a ram writing cache is set, and the lower half portion is assembled to be of different RAID structures according to needs of users, and is used as a data array so as to store cold data; an address mapping Hash locating table between a data disk and the cache of the real SSD is built; a timer is set so as to regularly write data cached in the ram writing cache of the virtual SSD into the virtual SSD; a request from an upper layer file system is received; for a reading request, when the reading request is not hit in the real SSD, data are read from the data array. The disk array caching method gives consideration to performance, reliability and cost.

The invention discloses an I/O (input/output) scheduling method based on internal parallelism of a solid state disk (SSD). The method comprises the steps of dividing a logical address space of the SSD into N areas in the same size, conducting serial numbering on the areas, assigning a subqueue used for managing each area for each area, setting an area counter i=1, judging whether a read request FIFO (First Input First Output) queue of the ith area contains a read request or a write request FIFO queue contains a write request, if so, judging whether the last service request in the ith area is the write request, and if so, judging whether the read request FIFO queue and a read request red-black tree contains the read request, wherein each subqueue comprises the read request FIFO queue, the write request FIFO queue, the read request red-black tree and a write request red-black tree. The method can reasonably and moderately utilize the internal parallelism of the solid state disk and avoid mutual interference between the read request and the write request, so that the I/O performance of a whole solid state disk system can be improved, and the service life of the whole solid state disk system can be prolonged.

The invention provides a data updating method and device, a storage medium and equipment. The method comprises the steps: acquring at least one data updating request sent by front-end equipment; Storing the data updating requests with the same data identifiers into a queue; processing data updating requests in the queue sequentially, wherein the processing comprises the steps: reading to-be-updated data corresponding to the data updating requests are read according to data identifiers; In response to the data updating request, processing to-be-updated data; Storing the processed to-be-updateddata to a cache; Judging whether the processing time reaches a preset time period or not; And if yes, updating the to-be-updated data in the cache to the database, and pausing processing until the operation of updating the to-be-updated data to the database is completed.

The invention discloses a method and a device for writing data in a non-volatile memory. The method comprises the following steps of: backing up all data of a memory cell at an address of data to be written-in in a data region to a data buffer region in a random access memory (RAM) when determining that data is to be written in the data region of the non-volatile memory during execution of an operating instruction; backing up original data at the address of the data to be written-in in the data region to a backup buffer region in the RAM and recording address information of the original data, which is backed up, in the data region in the backup buffer region; writing the data to be written in at a corresponding position of the data buffer region according to the address of the data to be written-in in the data region; and writing the data in the data buffer region back to the data region and clearing the backup buffer region when determining that the execution of the operating instruction is finished. By the method and the device, the data is quickly written in the non-volatile memory, write-in frequency of the non-volatile memory is reduced, program running speed is increased and service life of the non-volatile memory is prolonged.

An embodiment of the invention provides a cache writing method, a caching device and a storing system. The method includes that at least one metadata in an internal storage is updated; at least one metadata set where the metadata belongs is obtained; if a writing state of a first metadata set in the metadata set is a non-writing state, and a plurality of writing input/output (IO) request commands waiting for executing metadata writing operation exist under the first metadata set, the plurality of writing IO request commands are moved to a combination writing metadata queue of the first metadata set; the metadata in the first metadata set is written into a metadata block corresponding to the first metadata set in Flash; according to the plurality of writing IO request commands under the combination writing metadata queue of the first metadata set, the state showing whether the first metadata set is written successfully is returned. By means of the cache writing method, the caching device and the storing system, writing times of metadata of the Flash can be reduced to some extent.

The invention provides a storage system with a second-level cache structure. The storage system comprises a host internal memory and a solid state hard disk, wherein the solid state hard disk comprises a main control chip, an NAND chip and an MRAM; the host internal memory comprises a read cache; and the MRAM comprises a write cache. The invention furthermore provides a reading/writing method which adopts the storage system with the second-level cache structure. According to the second-level cache structure and the reading/writing method which adopts the second-level cache structure, the reading operability is better; the MARM is used as the write cache, so that the data writing speed is greatly improved while the security of the data under the condition of unexpected outage is ensured; by using the read cache in the host internal memory, the limited MRAM space can be used as the write cache as much as possible, so that the cost is optimum and an expensive outage protection system is saved; and by using the MRAM as the write cache, the write frequency of the NAND is decreased, so that the NAND is protected and the service life of the NAND is prolonged. According to the storage system and the reading/writing method, a scheme with good cost-benefit ratio is provided.

This invention relates to a large volume nonvolatile alarm data storage device including a microcontroller, a nonvolatile RAM storage, a FLASH storage, a CMOS low power loss linear regulator and an interface, in which, the FLASH storage and the nonvolatile RAM storage are combined to store the alarm data, the microcontroller controls the read and write of the two storages and receives the alarm data via the serial interface or receives instructions to output the alarm historical records advantaged that the FLASH is taken as the primary storage to store large volumes of historical data and the nonvolatile RAM storage is used to buffer alarm data without limit of writing times to reduce the writing times of the FLASH storage and increase the life time of the device.

The invention relates to data storage method and equipment. The method comprises the following steps of: receiving a write request; determining an itemization unit SU of the write request in the layout of a virtual logical unit number LUN which is generated in advance; if judging that the SU already writes data and the write times of a hard disk unit DU which belongs to the SU and has a given size exceed the preset write times, redistributing at least one new DU for the SU from a DU resource pool; and writing the data in the write request and the original data on the SU into at least one new DU which is distributed for the SU. By abrading and balancing the DUs of all hard disks in a storage system, the embodiment of the invention enhances the service life of a solid-state hard disk greatly.

The invention provides a server cluster which comprises a login server, a database server and a game server, wherein the login server is used for carrying out login authentication on users, the database server is used for storing game data, and the game server is used for carrying out synchronous control on game data and carrying out logic control on the game play, the server cluster also comprises multiple gateway servers and a message routing server, the multiple gateway servers access the game server by users, and the message routing server is used for carrying out message routing between each gateway server and the game server, the gateway servers are connected with the game server through the message routing server, and the login server is connected with the game server through the database server. Accordingly, the invention also provides a server system. According to the technical scheme of the invention, under the premise of not affecting the stability and smoothness of games, the system load is improved and the online number of people playing games is increased.

The invention discloses a method of optimizing a page-level flash memory transformation layer and belongs to the field of data storage. By means of the characteristic that an SLC flash memory supports part of writing, a mechanism of writing an in-situ log is adopted to reduce expenditure of access of a flash memory mapping page. The method comprises the following steps of: reserving a small part of the flash memory mapping page as a log region; when the flash memory mapping page is updated, establishing a log unit by all mapping items belonging to the mapping page in cache and adding the log region written to the mapping page by employing a part of writing mechanism; when the log region is written fully or the writing number of times exceeds a certain threshold value, combining and operating the mapping items in the flash memory mapping page and the items of the log page, and writing the same to a new flash memory mapping page; and at the moment, the log region in the new mapping page is empty, receiving an updating operation of the new mapping page and employing an in-situ log writing mechanism again. By reducing the expenditure of access of the flash memory mapping page, purposes of improving the performances of a flash memory solid disc and prolonging the service life are achieved.

The invention discloses a design method of a page-level flash memory conversion layer of a solid-state hard disk. The invention divides the NAND flash memory into two parts of a data block area and atranslation block area, wherein the data block area is used for storing conventional user data, the translation block area only stores mapping information, and the whole flash memory adopts the page-based mapping. The RAM is divided into W-CMT, R-CMT and GTD three parts. The W-CMT is used for storing write data mapping information with high access frequency. The R-CMT is used to store the read data mapping information with high access frequency, and the GTD is used to record the address mapping entries in the mapping block. The method of the invention realizes the high-flexibility page-level mapping, and at the same time, greatly reduces the frequent updating of translated pages caused by data updating, thereby improving the overall system performance and prolonging the service life of thesolid-state hard disk.

Embodiments of the invention disclose a method and a device for data storage. The method and the device are applied in a mobile terminal device. The method comprises: obtaining log data which is generated by a mobile terminal device currently and is used to update log files; according to a preset rule, determining the grade of the obtained log data; according to the determined grade of the log data, determining the storage position of the obtained log data; and storing the obtained log data in the determined storage position. Since the log data is stored according to the grade of the log data, and the log data is stored in the determined storage position, generated log data is not stored in an external storage of the mobile terminal device every time. Therefore, number of writing-in times of the external storage of the mobile terminal device is reduced, and service life of the external storage is improved.

The invention is applicable to the technical field of solid state disks, and provides a solid state disk and a method for optimizing a write request of the solid state disk. The method includes the steps: A, detecting the small-range write request of the solid state disk; B, caching the write request in a memory; C, issuing the write request when a preset condition is met or the write request is finished. Therefore, the write frequency of the solid state disk is effectively decreased, and the service life of the solid state disk is prolonged.