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

The invention is applicable to the field of data security, and provides a solid state hard disk data encryption and decryption method and a solid state hard disk system. The data encryption and decryption method comprises the following steps that a host computer generates a public key and private key pair (k1, k2) based on the asymmetrical encryption algorithm; the private key k2 is stored into a solid state hard disk, and the public key k1 is stored into the host computer; a secret key k3 based on the symmetrical encryption algorithm is generated at the host computer, and the secret key k3 is stored into the solid state hard disk after being signed and encrypted through the private key k2; during the system initialization, the host computer decrypts the secret key k3 encrypted by the private key k2 in the solid state hard disk through the public key k1, a plaintext secret key k3 is obtained, and the solid state hard disk realizes the encryption / decryption on data in the solid state disk through the plaintext secret key k3; when the system is powered off or the computer is powered off, the plaintext secret key k3 is deleted, and in addition, the plaintext secret key k3 cannot be accessed by other programs during the system operation. Therefore, the solid state hard disk data encryption and decryption method and the solid state hard disk system have the advantages that the data encryption intensity and the data security of the solid state hard disk can be improved, and in addition, the reading and writing performance of the solid state hard disk is ensured.

A test method for radio frequency tags, which modulates the determined coding instructions on the carrier wave of the radio frequency signal generator to ensure that under the rated output power, scanning is performed according to the frequency range where the radio frequency tag is located, and at the same time the carrier signal is scanned according The protocol of the radio frequency tag is modulated, and the oscilloscope sends the peak value of the signal in the time domain received by its sensing antenna to the PC, and the PC converts the frequency of the time domain signal into a frequency domain signal, so that the dynamic resonance peak value and bandwidth of the radio frequency tag can be measured. Guaranteed the read and write performance of tags after mass production.

The embodiments of the present application provide a video pre-recording method and a cloud storage system. The method includes: receiving video stream data collected by a target monitoring device; determining a pre-recording storage area in a designated disk corresponding to the target monitoring device according to an identifier of the target monitoring device , obtain the target pre-recording storage area; store the currently received video stream data of the target monitoring device in the target pre-recording storage area in a periodic overwrite manner; store the data in the target pre-recording storage area to the cloud storage system in the long-term storage area of ​​the recording pool. Use the pre-recording storage area corresponding to the monitoring device in the designated disk to cache the video recording of the monitoring device. The storage space of the disk is much larger than the ring memory. The video pre-recording can be performed according to the actual time required, which greatly increases the pre-recording. The data volume of the video, thereby increasing the duration of the pre-recorded video.

The invention discloses a data storage method, device, system, computer equipment and storage medium, wherein the method includes: processing a write request of data to be stored in memory, and caching the data to be stored in memory; When the data reaches the first preset threshold, the data to be stored in the memory is converted into a multi-layer matrix array with indexes, and stored in the storage layer of the matrix storage structure preset in the non-volatile storage device; when the non-volatile When the data in the volatile storage device reaches the second preset threshold, the data stored in the non-volatile storage device is merged and written into the next layer of the merged tree structure. The invention can ensure the read and write performance of the system, increase the space size of each layer, and thereby solve the write amplification performance overhead brought by the multi-layer log structure tree structure to the system, thereby reducing system fluctuations and pause delays.