A memory erasure code distribution method based on heat perception

Abstract

The invention discloses a memory erasure code distributing method based on heat perception, and belongs to the technical field of computer storage. According to the variation of data block access frequency, the method regularly executes the following steps of firstly, dividing the heat grades of data blocks in a memory, wherein the higher the access frequency is, the higher the heat grade of the data block is; secondly, backing up copies of the data blocks with the heat grades from low to high, thereby improving the access feasibility; thirdly, deleting or replacing the copies of the data blocks with the heat grades from high to low, thereby saving the memory space and increasing the utilization rate. According to the method, by means of an access frequency sensing strategy, the memory data blocks are dynamically adjusted, the erasure code storage scheme is adopted for low-access-frequency data, a copy scheme is adopted for high-access-frequency data, the memory utilization rate and access concurrency of the system are both considered, and the load balance of the system is optimized.

Description

technical field [0001] The invention belongs to the technical field of computer storage, and more specifically relates to a memory erasure code distribution method based on heat perception. Background technique [0002] In the information age where the amount of data is soaring, in-memory storage has become a key component of many data-intensive applications, such as OLTP and OLAP. Memory capacity and bandwidth roughly double every three years, while its price drops tenfold every five years. As a result, more and more commercial applications can afford the cost of DRAM products. Memory storage systems have gradually tried to store major data In-memory to support scalable and low-latency data access. [0003] Due to the volatility of DRAM, memory storage systems will temporarily lose memory data in the event of a power failure or system crash. In response to this phenomenon, redundancy strategies are usually used to improve the availability of memory data. Existing redunda...

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a memory erasure code distribution method based on heat perception, the purpose of which is to divide the data blocks in the memory into heat levels, and the data with higher access frequency The higher the heat level of the block is; secondly, copy the data block whose heat level changes from low to high to improve the parallelism of access; after that, delete or replace the copy of the data block whose heat level changes from high to low, saving Memory space, improve the utilization rate, take into account the memory utilization rate and access concurrency, achieve balance, and solve the problem of node load imbalance caused by the serious inclination of the access frequency of disk files and memory data over time

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