39results about How to "Guaranteed read and write performance" patented technology

The invention discloses a hybrid main storage architecture based efficient dynamic page scheduling method applied to a memory controller of a horizontal storage architecture which comprises a first storage medium and a second storage medium. The hybrid main storage architecture based efficient dynamic page scheduling method comprises the steps of configuring an access list respectively in each storage medium; configuring a stack respectively for each storage medium in the memory controller; carrying out dynamic management fore recently accessed pages in the storage medium based on the page state records recorded in the stack and the reading-writing access time recorded in the access list, placing the pages with high writing hot-degree in the first storage medium, storing the frequently read pages in the second storage medium, wherein the first storage medium is a DRAM, and the second storage medium is NVM. The hybrid main storage architecture based efficient dynamic page scheduling method can master the historical access information more precisely to adapt to the application scenes with relatively weak locality, can greatly reduce frequent and ineffective page migration quantity between the hybrid memory mediums, and can improve the utilization rate and the access hit rate of a main memory.

The invention discloses a secure storage platform for data. The secure storage platform for data comprises an authentication server, a secure key management server, an application server and a distributed cluster, wherein the authentication server is connected to a client and used for performing security verification on an access request after the access request is sent to the distributed cluster by the client; the secure key management server is connected to the authentication server and used for managing a file key so as to assign a private key of the file key to the designated client; the application server is connected between the distributed cluster and the client and is taken as an access agent of the client to access the distributed cluster; the distributed cluster is connected to the application server and is used for storing cloud data, and the application server is allowed to access the distributed cluster after the authentication server judges that the client is the designated server according to the private key and the access request. According to the technical scheme, the security of the storage platform is improved on the premise that expansibility, economic efficiency and effectiveness of the platform are guaranteed.

The invention discloses a data storage method, device and system, computer equipment and a storage medium, and the method comprises the steps: processing a write-in request of to-be-stored data in a memory, and caching the to-be-stored data in the memory; when the data cached in the memory reaches a first preset threshold value, converting the to-be-stored data in the memory into a multi-layer matrix array with an index, and storing the multi-layer matrix array in a storage layer of a matrix storage structure preset in the nonvolatile storage equipment; and when the data in the nonvolatile storage device reaches a second preset threshold value, performing merging processing on the data stored in the nonvolatile storage device, and writing the data into the next layer of the merging tree structure. According to the inventionmethod, the read-write performance of the system can be ensured, and the space size of each layer is increased, so that the write-amplification performance cost of the system caused by the multilayer log structure tree structure is solved, and the system fluctuation and the pause delay are reduced.

It is an RFID testing method, using the determined coding instructions to modulate the RF signal generator carrier, assuring that under the rated output power, in accordance with RFID working frequency range to scan, and meanwhile modulating the carrier signal according to the RFID protocol, the oscillograph sends the time-domain signal peak received by its sensing antenna to PC, and PC converts the time-domain signal frequency into the frequency-domain signal, and thus it can detect RFID dynamic resonance peak and bandwidth, ensuring the reading and writing performance after RFID mass-production.

The present invention provides a data storage apparatus. The data storage apparatus comprises a host interface, a main control chip, one or more NAND chip used for storing data and an MRAM. The NAND chip and the MRAM are separately connected to the main control chip. The MRAM comprises a write cache or a read/write cache, and the MRAM further comprises an erasure time table and an unavailable page table, wherein the erasure time table is used for storing the number of times of erasing each block in the NAND chip, and the unavailable page table comprises a page in a bad block that appears when the NAND chip leaves a factory, a page in a bad block that appears in a subsequent read/write usage process and alternative pages of the foregoing pages. According to the data storage apparatus and the read/write method using the unavailable page table/unavailable block table, which is provided by the present invention, the MRAM comprises the write cache or the read/write cache, which not only ensures read/write performance, but also reduces the number of times of erasing the NAND and prolonging the service life of the data storage apparatus; the erasure time table and unavailable page table/unavailable block table of each block are maintained, and an NAND management technology of remote writing will not be adopted any more, and a logic address and physical address contrast table that occupies a large amount of space does not need to be stored, so that not only storage space is saved, but also complex processing is not required, thereby further improving read/write performance.

An embodiment of the invention provides a magnetic disk remapping method, a magnetic disk remapping device and electronic equipment. The magnetic disk remapping method includes: when a bad track exists in a hot data area of a magnetic disk, adopting a redundancy mechanism of RAID (redundant array of independent disk) to recover data of the area with the bad track to a reserved area of the magnetic disk by means of remapping, and then determining a cold data area as a target area; exchanging stored data in the reserved area and the target area to enable the hot data to be accessed through a physical address of the target area. Hot data access is realized by directly accessing to the original cold data area, so that read-write performances of the magnetic disk are guaranteed; further, possibility of bad track diffusion is lowered, and reliability of a storage system is improved.

Embodiments of the present application provide a data processing method and apparatus, and relates to the field of communication technology, which can solve the problem of poor service quality of important services due to insufficient memory resources of OSD used for reading and writing important service data. The method includes: receiving a write request message sent by the terminal, wherein thewrite request message carries a service priority and data to be written; mapping The data to be written to the target PG matched with the service priority, mapping the target PG to the target OSD matched with the priority of the target PG, and writing the data to be written to the target OSD by using the memory resources corresponding to the target OSD, wherein the priority of the OSD is directlyproportional to the amount of memory resources corresponding to the OSD.

The invention discloses a construction method and an operation method of a DRAM-NVM hybrid index structure. The constructed index structure comprises an index layer, a middle layer and a data layer; the index layer is stored in the DRAM; the middle layer comprises metadata nodes which are stored in the DRAM, and backup exists in the NVM; the data layer comprises LogTree, the LogTree is of a tree structure, the number of the LogTree is the same as that of the metadata nodes, and the LogTree is in one-to-one correspondence with the metadata nodes; in an initial state, the LogTree is stored in an NVM (Non-Volatile Memory) and is recorded as NvmTree; in the read-write process, backing up the LogTree with the access heat greater than a preset access heat threshold and caching the LogTree in a DRAM to create a Cache Tree; at the moment, the LogTree comprises an NvmTree initially stored in an NVM, a Cache Tree cached in a DRAM and a log stored in the NVM; the log is used for storing a record for carrying out write operation on the Cache; and a LogTree in the data layer is used for storing a target keyword key in a key value pair written by a user and a pointer pointing to a value. The fault recovery process can be greatly accelerated on the premise of ensuring the read-write performance.

The invention discloses an SAS (Serial Attached SCSI)/SATA (Serial Advanced Technology Attachment) expander information self-adaption method and system. A self-adaptive SASSATA3.0 Expander system converts the uplink PCIE (Peripheral Component Interconnect Express) signal into into a downlink SAS/SATA signal, is connected with a plurality of paths of SAS/SATA Receivers; and the oscilloscope scanning period is adjusted at an output terminal of the downlink, the horizontal scanning period of the oscilloscope is synchronized with the period of receiving the code element; an eye pattern is formedby utilizing the afterglow function of the oscilloscope; indexes of the eye pattern template are determined through an SAS/SATA _ Tx protocol; de-emphasis and pre-emphasis of the output end of the expander chip are dynamically adjusted through a UART link to balance a high-frequency component and a low-frequency component; the influence of the transmission link on the final eye pattern result whenthe high-frequency component attenuation is greater than the low-frequency component attenuation is reduced; the weighted value is written into the FW of the Expander chip through the UART signal link to form a feedback loop, and the inter-symbol interference is reduced; and the transmission performance of the system is improved. The invention provides a self-adaptive circuit design, and by dynamically adjusting pre-emphasis and de-emphasis of a sending end and compensating a telling signal, the read-write performance and the data security of the hard disk are ensured.