CN103136215A - Data read-write method and device of storage system - Google Patents
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Abstract
The invention provides a data read-write method and a device of a storage system. The data read-write method of the storage system comprises that A, a request sent by a client is identified to a reading request or a writing request, if the request is the writing request, a step B is executed, and if the request is a reading request, a step C is executed; according to a sequential writing mode, data to be written of the writing request is written into a current data file, and writing places of key characters and data carried by the writing request correspond to a written index table; C, the built index table is judged whether key characters carried by the reading request are contained or not, if the key characters are contained, according to the corresponding data places of the key characters in the index table, data of the data places are read on the storage system.
Description
Technical field
The present invention relates to data communication field, particularly the data read-write method of storage system and device.
Background technology
In data communication field, the readwrite performance of storage system is most important.The reading/writing method of existing storage system is described as example take storage system as solid state hard disc:
So-called solid state hard disc, the hard disk of its essence for making with solid-state electronic storage chip array is comprised of control module and storage unit (this storage unit can realize by dynamic RAM DRAM or FLASH chip) two parts.Wherein, storage unit is responsible for storing data, and control module is responsible for from the data of cell stores reading out data or to the storage unit data writing.At present, solid state hard disc due to have fast, durable shockproof, the noiselessness of speed, the advantage such as lightweight is used widely.
At present, solid state hard disc adopts with mode machine-readable and that write at random.Wherein, have greater advantage with machine-readable with respect to other common hard discs, still, writing at random is a bottleneck of solid state hard disc, can cause the solid state hard disc overall performance sharply to descend such as writing at random frequently.For fear of this problem, a kind of better mode reduces write operation exactly, and regular batch processing write operation is such as, every day or only process weekly write operation one time.Although what this mode had been evaded solid state hard disc writes the problem of bringing at random,, can cause the data of solid state hard disc can not real-time update, and then solid state hard disc provide the real-time of data relatively poor.
Summary of the invention
The invention provides data read-write method and the device of storage system, with the sequential write that realizes storage system, with machine-readable, avoid owing to storage system being write at random the problem of bringing.
Technical scheme provided by the invention comprises:
A kind of data read-write method of storage system comprises:
The request that A, identify customer end send is read request or write request, if write request, execution in step B is if read request, execution in step C;
B, the mode of writing in order writes to current data file with the data that described write request will write, and the position correspondence that the key word that described write request is carried and described data write writes concordance list;
Whether C comprises the key word that this read request is carried in the concordance list that judgement has been set up, and if so, in the described concordance list of foundation, Data Position corresponding to this key word reads the data on this Data Position in storage system.
A kind of data write method of storage system comprises:
A receives the write request that client sends;
B, the mode of writing in order writes to current data file with the data that described write request will write, and the position correspondence that the key word that described write request is carried and described data write writes concordance list.
A kind of data read-write equipment of storage system comprises:
Recognition unit, the request that is used for the identify customer end transmission is read request or write request;
R/w cell, be used for when described recognition unit identifies write request, the mode of writing in order writes to current data file with the data that described write request will write, and the position correspondence that the key word that described write request is carried and described data write writes concordance list;
Read the unit, be used for when described recognition unit identifies read request, whether comprise the key word that this read request is carried in the concordance list that judgement has been set up, if so, in the described concordance list of foundation, Data Position corresponding to this key word reads the data on this Data Position in storage system.
A kind of data read/write device of storage system comprises:
Receiving element is used for receiving the write request that client sends;
R/w cell, the mode that is used for writing in order writes to current data file with the data that described write request will write, and the position correspondence that the key word that described write request is carried and described data write writes concordance list.
As can be seen from the above technical solutions, in the present invention, when receiving read request, the Data Position that the key word that carries according to this read request in concordance list is corresponding reads the data on this Data Position in storage system, namely realized with machine-readable, and when receiving write request, the mode of writing in order writes to current data file with the data that described write request will write, and the key word that described write request is carried and the position correspondence of described data write concordance list, namely realized sequential write, this is avoided owing to storage system being write at random the problem of bringing.
Description of drawings
The reading and writing data process flow diagram that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 writes process flow diagram for the data that the embodiment of the present invention provides;
Fig. 3 is that storage system provided by the invention is upgraded process flow diagram;
The read-write equipment structural drawing that Fig. 4 provides for the embodiment of the present invention;
The write device structural drawing that Fig. 5 provides for the embodiment of the present invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.
Storage system in the present invention can be solid state hard disc or other have the system of memory function, its according to universal document system such as ext3 file system storage data.The below is described data reading and writing method in storage system provided by the invention:
Referring to Fig. 1, the reading and writing data process flow diagram that Fig. 1 provides for the embodiment of the present invention.As shown in Figure 1, this flow process can comprise the following steps:
This step 101 can receive the request that client sends by corresponding communication interface, and this communication interface can adopt present network communication mode, and such as TCP mode, UDP mode etc., the present invention does not specifically limit.
Step 102, the mode of writing in order writes to current data file with the data that described write request will write, and the position correspondence that the key word (Key) that described write request is carried and described data write writes concordance list.Finish current flow process.
Whether step 103 comprises the key word that this read request is carried in the concordance list that judgement has been set up, and if so, in the described concordance list of foundation, Data Position corresponding to this key word reads the data on this Data Position in storage system.Finish current flow process.
What need the explanation explanation is, in flow process shown in Figure 1, the key word that read request or write request are carried can be the sign of client, and such as the instant messaging account etc., the present invention does not specifically limit.
In addition, in flow process shown in Figure 1, the Data Position in concordance list can comprise file identification, the data positional information in the file with this document sign such as reference position etc., and the present invention does not specifically limit.Take Data Position comprise file identification, the data positional information in the file with this document sign such as reference position etc. as example, in above-mentioned steps 103, obtain Data Position corresponding to key word that this read request is carried in concordance list.This Data Position comprises that the file identification at data places is such as data-filename, and data are at the reference position data-position of this data-filename file, usually, a data head is arranged in data, the length L that comprises these data in this data head, based on this, in step 103, just need to first open the data-filename file and from this data-filename file data-position begin to read the data that length is L.
So far, completing reading and writing data flow process shown in Figure 1 describes.
The below writes flow process to data provided by the invention and is described:
At first by Fig. 2, data provided by the invention being write flow process simply describes.
Referring to Fig. 2, Fig. 2 writes process flow diagram for the data that the embodiment of the present invention provides.As shown in Figure 2, this flow process can comprise:
This step 201 can receive the write request that client sends by corresponding communication interface, and this communication interface can adopt present network communication mode, and such as TCP mode, UDP mode etc., the present invention does not specifically limit.
Wherein, the key word that write request is carried can be the sign of client, and such as instant messaging account etc., it is corresponding with the data that this write request will write.
wherein, can comprise during step 202 specific implementation: judge whether described concordance list comprises the key word that described write request is carried, if not, it (is the covering of write request that the mode of writing in order writes in current data file the data that described write request will write, revise also referred to as full dose), and described the write request key word that carries and the position correspondence that these data write are write the concordance list of having set up, if, read the data on Data Position corresponding to described key word, and the mode of writing in order is with these data that read, and the data that described write request will write write current data file (being called increment revises), upgrading the Data Position that described in described concordance list, key word is corresponding is the described data that read, and the described write request current position that writes of data that will write.
In addition, in flow process shown in Figure 2, the mode of writing in order writes current data file with data and comprises: the mode of writing in order is to the current data file data writing; If the data in data writing process in current data file reach the setting capacity, switching current data file is history data file, and creating new file as current data file, the mode of writing in order writes this current data file with remaining data.Can set up a write pointer during specific implementation, each this write pointer all points to the next position of the position of last data in current data file, so, when data were write in execution, the mode of writing in order began to the current data file data writing from the position of this write pointers point; If the data in data writing process in current data file reach the setting capacity, switching current data file is history data file, and create new file as current data file, the mode of writing in order writes this current data file with remaining data, with the next position of the position of last data in the write pointers point current data file.
So far, complete flow process shown in Figure 2.
Can find out from flow process illustrated in figures 1 and 2, in the present invention, the method for reading of storage system is that write method is sequential write, has avoided like this writing at random, can give full play to storage system such as the advantage of solid state hard disc with machine-readable, improves the efficient of writing of storage system.
In addition, can find out from flow process shown in Figure 2, in the present invention, storage system is by organizing a plurality of data files to preserve all data that client writes.For making the utilization of resources of storage system, just need to regularly to the data file update in storage system, specifically comprise flow process shown in Figure 3.
Referring to Fig. 3, Fig. 3 is that storage system provided by the invention is upgraded process flow diagram.As shown in Figure 3, this flow process can comprise:
Wherein, can comprise during step 301 specific implementation: travel through each data block in described history data file, described data block is that described history data file allows the data unit to its data writing, utilize that key word corresponding to this data block is counter looks into described concordance list, if the Data Position that in described concordance list, this key word is corresponding is not the position of this data block in described history data file, determine that this data block is gibberish.
Can comprise when wherein, reclaiming the history data file specific implementation: with the data except gibberish in described history data file as valid data; Described valid data are refreshed by write order: the mode of writing in order writes current data file, and to upgrade the corresponding Data Position of key word that described in described concordance list, valid data are corresponding be the position that current data file writes; Reclaim described history data file.Here, reclaim history data file and also namely delete this history data file, the shared space of this deleted history data file can be re-used afterwards.
So far, complete flow process shown in Figure 3.
Above method provided by the invention is analyzed, the below analyzes device provided by the invention.
Referring to Fig. 4, the read-write equipment structural drawing that Fig. 4 provides for the embodiment of the present invention.As shown in Figure 4, this device comprises:
Recognition unit, the request that is used for the identify customer end transmission is read request or write request;
R/w cell, be used for when described recognition unit identifies write request, the mode of writing in order writes to current data file with the data that described write request will write, and the position correspondence that the key word that described write request is carried and described data write writes concordance list;
Read the unit, be used for when described recognition unit identifies read request, whether comprise the key word that this read request is carried in the concordance list that judgement has been set up, if so, in the described concordance list of foundation, Data Position corresponding to this key word reads the data on this Data Position in storage system.
Correspondingly, the present invention also provides the data read/write device of storage system, specifically as shown in Figure 5.Referring to Fig. 5, the write device structural drawing that Fig. 5 provides for the embodiment of the present invention.As shown in Figure 5, this device can comprise:
Receiving element is used for receiving the write request that client sends;
R/w cell, the mode that is used for writing in order writes to current data file with the data that described write request will write, and the key word that described write request is carried and the position correspondence of described data write concordance list.
The mode that r/w cell in Fig. 4 or Fig. 5 is write in order writes current data file with data and comprises:
The mode of writing in order is to the current data file data writing;
If the data in data writing process in current data file reach the setting capacity, switching current data file is history data file, and creating new file as current data file, the mode of writing in order writes this current data file with remaining data.
In addition, the r/w cell in Fig. 4 or Fig. 5 can comprise during specific implementation:
Judgment sub-unit is used for judging whether described concordance list comprises the key word that described write request is carried;
First writes subelement, be used in described judgment sub-unit when the determination result is NO, the mode of writing in order writes in current data file the data that described write request will write, and the position correspondence of the key word that described write request is carried and these data writes the concordance list of having set up;
Second writes subelement, be used for when judgment result is that of described judgment sub-unit is, read the data on Data Position corresponding to described key word, and the mode of writing in order writes current data file with the data that these data that read and described write request will write, and upgrading the Data Position that described in described concordance list, key word is corresponding is the current position that writes of data that the described data that read and described write request will write.
Preferably, in the present invention, for improving the space availability ratio of storage system, Fig. 4 or device shown in Figure 5 further comprise:
Reclaim judging unit, be used for for each history data file, determine gibberish from this history data file, judge whether the ratio that this gibberish of determining is occupied reaches setting value in all data of this history data file;
Recovery unit is used for reclaiming this history data file when judgment result is that of described recovery judging unit is.
Wherein, each data block in the described history data file of described recovery judging unit traversal, described data block is that described history data file allows the data unit to its data writing, utilize that key word corresponding to this data block is counter looks into described concordance list, if the Data Position that in described concordance list, this key word is corresponding is not the position of this data block in described history data file, determine that this data block is gibberish.
Described recovery unit with the data except gibberish in described history data file as valid data, the mode that described valid data are write in order writes current data file, and to upgrade the corresponding Data Position of key word that described in described concordance list, valid data are corresponding be the position that current data file writes, and reclaims described history data file.
So far, completing apparatus structure provided by the invention describes.
As can be seen from the above technical solutions, in the present invention, when receiving read request, the Data Position that the key word that carries according to this read request in concordance list is corresponding reads the data on this Data Position in storage system, namely realized with machine-readable, and when receiving write request, the mode of writing in order writes to current data file with the data that described write request will write, and the key word that described write request is carried and the position correspondence of described data write concordance list, namely realized sequential write, this is avoided owing to storage system being write at random the problem of bringing.
Further, in the present invention, by regularly adopting above-mentioned flow process shown in Figure 3 to reclaim to the data file in storage system, can improve the space availability ratio of storage system.
The above is only preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (15)
1. the data read-write method of a storage system, is characterized in that, the method comprises:
The request that A, identify customer end send is read request or write request, if write request, execution in step B is if read request, execution in step C;
B, the mode of writing in order writes to current data file with the data that described write request will write, and the position correspondence that the key word that described write request is carried and described data write writes concordance list;
Whether C comprises the key word that this read request is carried in the concordance list that judgement has been set up, and if so, in the described concordance list of foundation, Data Position corresponding to this key word reads the data on this Data Position in storage system.
2. method according to claim 1, is characterized in that, the Data Position that described key word is corresponding comprises: file identification, the positional information of data in the file with this document sign.
3. the data write method of a storage system, is characterized in that, the method comprises:
A receives the write request that client sends;
B, the mode of writing in order writes to current data file with the data that described write request will write, and the position correspondence that the key word that described write request is carried and described data write writes concordance list.
4. according to claim 1 or 3 described methods, is characterized in that, step B comprises:
judge whether described concordance list comprises the key word that described write request is carried, if not, the mode of writing in order writes in current data file the data that described write request will write, and described the write request key word that carries and the position correspondence that these data write are write the concordance list of having set up, if, read the data on Data Position corresponding to described key word, and the mode of writing in order is with these data that read, and the data that described write request will write write current data file, upgrading the Data Position that described in described concordance list, key word is corresponding is the described data that read, and the described write request current position that writes of data that will write.
5. method according to claim 4, is characterized in that, the mode of writing in order writes current data file with data and comprises:
The mode of writing in order is to the current data file data writing;
If the data in data writing process in current data file reach the setting capacity, switching current data file is history data file, and creating new file as current data file, the mode of writing in order writes this current data file with remaining data.
6. method according to claim 5, is characterized in that, the method further comprises:
For each history data file, determine gibberish from this history data file;
Judge that whether the ratio that this gibberish of determining is occupied reaches setting value, if so, reclaims this history data file in all data of this history data file.
7. method according to claim 6, is characterized in that, the described gibberish of determining from history data file comprises:
Travel through each data block in described history data file, described data block is that described history data file allows the data unit to its data writing, utilize that key word corresponding to this data block is counter looks into described concordance list, if the Data Position that in described concordance list, this key word is corresponding is not the position of this data block in described history data file, determine that this data block is gibberish.
8. method according to claim 6, is characterized in that, described recovery history data file comprises:
With the data except gibberish in described history data file as valid data;
The mode that described valid data are write in order writes current data file, and to upgrade the corresponding Data Position of key word that described in described concordance list, valid data are corresponding be the position that current data file writes;
Reclaim described history data file.
9. the data read-write equipment of a storage system, is characterized in that, this device comprises:
Recognition unit, the request that is used for the identify customer end transmission is read request or write request;
R/w cell, be used for when described recognition unit identifies write request, the mode of writing in order writes to current data file with the data that described write request will write, and the position correspondence that the key word that described write request is carried and described data write writes concordance list;
Read the unit, be used for when described recognition unit identifies read request, whether comprise the key word that this read request is carried in the concordance list that judgement has been set up, if so, in the described concordance list of foundation, Data Position corresponding to this key word reads the data on this Data Position in storage system.
10. the data read/write device of a storage system, is characterized in that, this device comprises:
Receiving element is used for receiving the write request that client sends;
R/w cell, the mode that is used for writing in order writes to current data file with the data that described write request will write, and the position correspondence that the key word that described write request is carried and described data write writes concordance list.
11. according to claim 9 or 10 described devices is characterized in that, described r/w cell comprises:
Judgment sub-unit is used for judging whether described concordance list comprises the key word that described write request is carried;
First writes subelement, be used in described judgment sub-unit when the determination result is NO, the mode of writing in order writes in current data file the data that described write request will write, and the position correspondence of the key word that described write request is carried and these data writes the concordance list of having set up;
Second writes subelement, be used for when judgment result is that of described judgment sub-unit is, read the data on Data Position corresponding to described key word, and the mode of writing in order writes current data file with the data that these data that read and described write request will write, and upgrading the Data Position that described in described concordance list, key word is corresponding is the current position that writes of data that the described data that read and described write request will write.
12. according to claim 9 or 10 described devices is characterized in that, the mode that described r/w cell is write in order writes current data file with data and comprises:
The mode of writing in order is to the current data file data writing;
If the data in data writing process in current data file reach the setting capacity, switching current data file is history data file, and creating new file as current data file, the mode of writing in order writes this current data file with remaining data.
13. device according to claim 12 is characterized in that, this device further comprises:
Reclaim judging unit, be used for for each history data file, determine gibberish from this history data file, judge whether the ratio that this gibberish of determining is occupied reaches setting value in all data of this history data file;
Recovery unit is used for reclaiming this history data file when judgment result is that of described recovery judging unit is.
14. device according to claim 13, it is characterized in that, each data block in the described history data file of described recovery judging unit traversal, described data block is that described history data file allows the data unit to its data writing, utilize that key word corresponding to this data block is counter looks into described concordance list, if the Data Position that in described concordance list, this key word is corresponding is not the position of this data block in described history data file, determine that this data block is gibberish.
15. device according to claim 13, it is characterized in that, described recovery unit with the data except gibberish in described history data file as valid data, the mode that described valid data are write in order writes current data file, and to upgrade the corresponding Data Position of key word that described in described concordance list, valid data are corresponding be the position that current data file writes, and reclaims described history data file.
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| CN111581212A (en) * | 2020-05-06 | 2020-08-25 | 深圳市朱墨科技有限公司 | Data storage method, system, server and storage medium of relational database |
| CN111581212B (en) * | 2020-05-06 | 2024-05-17 | 深圳市朱墨科技有限公司 | Data storage method, system, server and storage medium of relational database |
| CN112882659A (en) * | 2021-02-26 | 2021-06-01 | 杭州海康威视数字技术股份有限公司 | Information obtaining method and device, electronic equipment and storage medium |
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