US 2017/0286306 A1 · DATA ACCESSING METHOD AND APPARATUS

Abstract

A data accessing method includes: determining whether a preset cache area has cached data that a read target address points to when receiving a read instruction that includes the read target address; and finding a cache address corresponding to the read target address according to a first mapping relationship if the preset cache area has cached the data that the read target address points to, and reading data that the cache address points to from the preset cache area, where the first mapping relationship is used to record a correspondence between the target address and the cache address; orreading, from non-volatile storage space, the data that the read target address points to if the preset cache area has not cached the data that the read target address points to. By means of the method, data read errors caused by write interference can be reduced.

Claims15

Dependent claims

A data accessing method, comprising:

receiving a read instruction that comprises a target address of read data;
determining whether a preset cache area has cached the read data that the target address points to;
and
if the preset cached area has cached the read data, finding a cache address corresponding to the target address of the read data according to a first mapping relationship, and reading the read data from the preset cache area using the cache address, wherein the first mapping relationship specifies a correspondence between a storage address and a cache address, wherein the storage address is an address of the data stored in the non-volatile storage space and the cache address is an address of the data stored in the preset cache area;
and
if the present cache area has not cached the read data, reading the read data from the non-volatile storage space.

3 more elements

A data accessing apparatus comprising:

a memory comprising instructions;
and
one or more processors in communication with the memory that execute the instructions to:
receiving a read instruction that comprises a target address of read data;
determine whether a preset cache area has cached the read data that the target address points to;
and
if the preset cached area has cached the read data, find a cache address corresponding to the target address of the read data according to a first mapping relationship, and read the read data from the preset cache area using the cache address, wherein the first mapping relationship specifies a correspondence between a storage address and a cache address, wherein the storage address is an address of the data stored in the non-volatile storage space and the cache address is an address of the data stored in the preset cache area;
and
if the present cache area has not cached the read data, read the read data from the non-volatile storage space.

6 more elements

A non-transitory computer-readable medium storing computer instructions that when executed by one or more processors cause the one or more processors to perform the steps of:

determine whether a preset cache area has cached the read data that the target address points to;
and
if the preset cached area has cached the read data, find a cache address corresponding to the target address of the read data according to a first mapping relationship, and read the read data from the preset cache area using the cache address, wherein the first mapping relationship specifies a correspondence between a storage address and a cache address, wherein the storage address is an address of the data stored in the non-volatile storage space and the cache address is an address of the data stored in the preset cache area;
and
if the present cache area has not cached the read data, read the read data from the non-volatile storage space.

2 more elements

Dependencies are inferred from the claim text.

Data accessing method and apparatus

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Data accessing method and apparatus

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Abstract

Claims15