5results about How to "Reduce write amplification" patented technology

The application relates to the technical field of hybrid solid state disks, and discloses a hybrid solid state disk dynamic optimization method and device based on a large language model, which systematically classifies the parameter space of a hybrid solid state disk, constructs a parameter sensitivity matrix based on the classified parameters, determines the influence difference parameters of the parameters on performance under different workloads, collects system state information of the hybrid solid state disk in real time, generates an optimized parameter configuration scheme based on a large language model according to the system state information, the influence difference parameters and historical configuration information. The application can realize real-time perception of work load changes and dynamic focusing on the most sensitive parameter combination under the current load, realize collaborative reasoning and adaptive adjustment among multiple parameters, significantly reduce the write amplification rate and operation delay, and solve the problem that the response efficiency, system stability and energy consumption performance of the hybrid SSD are poor under a dynamic work load in the prior art.

The application discloses a data management method and system suitable for IMR, wherein when a bottom track is updated, data of an effective top track is actively migrated to other free tracks; in the MFML data update strategy, a zigzag four-stage data management scheme is adopted, in the first stage, data of the bottom track is updated; in the second stage, the MFML strategy is adopted to update data of the bottom track; in the third stage and the fourth stage, data distribution and bottom track data update are continuously performed according to the mode of the second stage, and data management is realized. The application can make the MFML update strategy better play the performance in the four-stage data management scheme, and can also relieve the performance decline problem caused by the too high top track occupation amount of the multi-stage distribution scheme.

This invention discloses a key-value storage system, electronic device, and medium based on an LSM-Tree, comprising: volatile memory for caching newly written data and retrieving newly written data; persistent memory including multiple cuckoo filters for indexing global data; the multiple cuckoo filters include several cuckoo filters, each containing a hash table with several hash buckets, each hash bucket containing four hash slots, each hash slot being 64 bytes in size, where the high 32 bytes are used to store the fingerprint of the key in the key-value pair, and the low 32 bytes are used to store the file number of the corresponding key-value pair; and a disk using a single-level file structure to persist key-value pair data and store data logs and system logs; wherein, the single-level file structure merges the files with the highest degree of overlap in the next round of merging operations based on the degree of overlap between files.

The application relates to the field of storage devices, in particular to a metadata storage method, a metadata recovery method, a metadata large block recovery method and a storage device, which comprises the following steps: dividing metadata into a plurality of metadata data streams, taking the metadata data stream as a storage unit, and storing the metadata in a metadata large block. The application can solve the problems of quick recovery of a quick start technology and introduction of additional write amplification.

The present application relates to a solid state disk write balancing optimization method, applied to a solid state disk containing a controller and a flash memory medium, the controller maintaining a logical address to physical page mapping table and erase count information; comprising: calculating the difference between the maximum and minimum erase counts of each erase block in a predetermined statistical range as a wear difference indicator; dividing the logical address into logical intervals, if a certain logical interval does not occur in the mapping failure update event within the time window, it is determined as a candidate cold logical interval; selecting a first candidate cold logical interval mapped to a high wear block and a second candidate cold logical interval mapped to a low wear block; without moving existing valid user data pages, only by updating the physical page set identifier or interval descriptor used for subsequent writing of the first and second candidate cold logical intervals in the mapping table, exchanging the physical page sets corresponding to the first and second candidate cold logical intervals; the mapping table update record and related block state are written in a log mode.