CN102520888A - Data processing method for RAID5 band and RAID5 processing system - Google Patents
Data processing method for RAID5 band and RAID5 processing system Download PDFInfo
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- CN102520888A CN102520888A CN2011104374626A CN201110437462A CN102520888A CN 102520888 A CN102520888 A CN 102520888A CN 2011104374626 A CN2011104374626 A CN 2011104374626A CN 201110437462 A CN201110437462 A CN 201110437462A CN 102520888 A CN102520888 A CN 102520888A
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Abstract
The invention provides a data processing method for an RAID5 band and an RAID5 processing system. The method includes: setting high priority for data to be written when the data to be written cannot fill the RAID5 band and if the data to be written are required to be written to an RAID5 magnetic disk in real time; and judging whether the high priority is set for the received data or not when the RAID5 processing system receives the data to be written, and timely writing the received data to the corresponding RAID5 band if the high priority is set for the received data.
Description
Technical field
The present invention relates to data processing technique, particularly the data processing method and the RAID5 disposal system of raid-array (RAID:Redundant Array of Independent Disk) 5 bands.
Background technology
In data processing technique, RAID is combined into a logic hard disk by different way with a plurality of independent physical hard disks, thereby improves the readwrite performance and the data security of hard disk.At present, according to the various combination mode, can be divided into different RAID ranks, RAID rank commonly used is: 0,1,2,3,4,5,6,01,10 etc.Describe the RAID rank below emphatically and be 5 RAID, be called for short RAID5.
The I/O of RAID5 handles, and particularly writes request, is that unit carries out with band (strip), and RAID5 guarantees the data security on this band depositing check bit on each band.But RAID5 do not require an independent hard disk and deposits checking data, but the verification data interaction is deposited on each different hard disk, and Fig. 1 shows the structured data repository of RAID5.In Fig. 1, P (Parity) representes checking data, when the data of writing to RAID5 can be filled up whole band fully, goes out the checking data of this band according to the RAID5 algorithm computation.With band 1 is example; When band 1 is write full data; According to the RAID5 algorithm such as XOR (xor; The expression with
) calculation check data; Be specially:
still; When the data that will write can not completely be filled up whole band; Just need read earlier on other disks that this band takies data then verification go out checking data P, just can on this this band, continue to write the above-mentioned data that will write.
That is to say; When the data that will write can not completely be filled up whole band, need read the data on other hard disks that this band takies earlier and calculate checking data P, and then write the data that this will write; This way can write by delayed data; And when the data that will write were some crucial metadata, this crucial metadata data write latency was handled and can be influenced service feature.
Summary of the invention
The invention provides the data processing method and the RAID5 disposal system of RAID5 band, in time write the disk of RAID5 with the data that realize writing will be realistic the time RAID5 disk.
Technical scheme provided by the invention comprises:
A kind of data processing method of RAID5 band comprises:
When the data that will write can not be filled up the RAID5 band,, then high priority is set for these data that will write if these data that will write are asked to write in real time the disk of RAID5;
When the RAID5 disposal system receives the data that will write, judge whether the data of this reception have been set up high priority, if the data that then in time will receive write corresponding RAID5 band.
A kind of RAID5 disposal system comprises:
Receiving element is used to receive the data that the user will write;
Judging unit is used to judge whether the data that said receiving element receives have been set up high priority; Wherein, when the data that will write can not be filled up the RAID5 band,, then high priority is set for these data that will write if these data that will write are asked to write in real time the disk of RAID5;
Writing unit is used in the judged result of said judging unit when being, the data that in time said receiving element received write corresponding RAID5 band.
Can find out by above technical scheme, among the present invention, when the data that will write can not be filled up the RAID5 band,, then high priority is set for these data that will write if these data that will write are asked to write in real time the disk of RAID5; When the RAID5 disposal system receives the data that will write; Whether the data of judging this reception have been set up high priority; If; The data that then in time will receive write corresponding RAID5 band, and the data that promptly realized writing will be realistic the time RAID5 disk in time write the purpose of RAID5 disk.
Description of drawings
Fig. 1 shows the structured data repository of RAID5;
The process flow diagram that Fig. 2 provides for the embodiment of the invention;
The RAID5 disposal system structural drawing that Fig. 3 provides for the embodiment of the invention.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer, describe the present invention below in conjunction with accompanying drawing and specific embodiment.
Method provided by the invention comprises flow process shown in Figure 2:
Referring to Fig. 2, the process flow diagram that Fig. 2 provides for the embodiment of the invention.As shown in Figure 2, this flow process can may further comprise the steps:
Here, high priority can be according to the actual conditions setting, such as, greater than certain certain threshold value etc., the present invention does not specifically limit.
In addition, in this step 201, the said data that are asked to write in real time the disk of RAID5 comprise at least: crucial metadata, and some other needs of confirming according to actual conditions in time write the data of disk.
That is to say; When being provided with high priority for the data that will write; This high priority will pass to the RAID5 disposal system; When the RAID5 disposal system identifies the data of high priority, in time this high-priority data is write in the shared disk of corresponding RAID5 band, promptly reached the purpose of real-time processing high-priority data.
Preferably; Among the present invention; When the data of judging reception when the RAID5 disposal system are not set up high priority, then can handle the data on other hard disks that the RAID5 band that will write such as the data that read this reception takies according to existing mode; And utilize the data computation checking data that reads, and the said data that will write at said RAID5 band based on this checking data.
So far, accomplishing method provided by the invention describes.
More than method provided by the invention is described, describe down in the face of RAID5 disposal system provided by the invention.
Referring to Fig. 3, the RAID5 disposal system structural drawing that Fig. 3 provides for the embodiment of the invention.As shown in Figure 3, this RAID5 disposal system comprises:
Receiving element is used to receive the data that the user will write;
Judging unit is used to judge whether the data that said receiving element receives have been set up high priority; Wherein, when the data that will write can not be filled up the RAID5 band,, then high priority is set for these data that will write if these data that will write are asked to write in real time the disk of RAID5;
Writing unit is used in the judged result of said judging unit when being, the data that in time said receiving element received write corresponding RAID5 band.
Preferably, among the present invention, the said data that are asked to write in real time the disk of RAID5 comprise at least: crucial metadata.
In addition; Among the present invention; The said write unit, further in the judged result of said judging unit for not the time, read the data on other hard disks that RAID5 band that the data of this reception will write takies; And utilize the data computation checking data that reads, and the said data that will write at said RAID5 band based on this checking data.
So far, accomplish RAID5 disposal system structrual description provided by the invention.
Can find out by above technical scheme, among the present invention, when the data that will write can not be filled up the RAID5 band,, then high priority is set for these data that will write if these data that will write are asked to write in real time the disk of RAID5; When the RAID5 disposal system receives the data that will write; Whether the data of judging this reception have been set up high priority; If; The data that then in time will receive write corresponding RAID5 band, and the data that promptly realized writing will be realistic the time RAID5 disk in time write the purpose of RAID5 disk.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope that the present invention protects.
Claims (6)
1. the data processing method of a RAID5 band is characterized in that, this method comprises:
When the data that will write can not be filled up the RAID5 band,, then high priority is set for these data that will write if these data that will write are asked to write in real time the disk of RAID5;
When the RAID5 disposal system receives the data that will write, judge whether the data of this reception have been set up high priority, if the data that then in time will receive write corresponding RAID5 band.
2. method according to claim 1 is characterized in that, the said data that are asked to write in real time the disk of RAID5 comprise at least: crucial metadata.
3. method according to claim 1 is characterized in that, this method further comprises:
When the RAID5 disposal system is not set up high priority in the data of judging reception; Read the data on other hard disks that RAID5 band that the data of this reception will write takies; And utilize the data computation checking data that reads, and the said data that will write at said RAID5 band based on this checking data.
4. a RAID5 disposal system is characterized in that, said RAID5 disposal system comprises:
Receiving element is used to receive the data that the user will write;
Judging unit is used to judge whether the data that said receiving element receives have been set up high priority; Wherein, when the data that will write can not be filled up the RAID5 band,, then high priority is set for these data that will write if these data that will write are asked to write in real time the disk of RAID5;
Writing unit is used in the judged result of said judging unit when being, the data that in time said receiving element received write corresponding RAID5 band.
5. RAID5 disposal system according to claim 4 is characterized in that, the said data that are asked to write in real time the disk of RAID5 comprise at least: crucial metadata.
6. RAID5 disposal system according to claim 4; It is characterized in that; The said write unit, further in the judged result of said judging unit for not the time, read the data on other hard disks that RAID5 band that the data of this reception will write takies; And utilize the data computation checking data that reads, and the said data that will write at said RAID5 band based on this checking data.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110413203A (en) * | 2018-04-28 | 2019-11-05 | 伊姆西Ip控股有限责任公司 | For managing the method, equipment and computer program product of storage system |
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|---|---|---|---|---|
| CN101650675A (en) * | 2009-08-28 | 2010-02-17 | 中兴通讯股份有限公司 | Method and device for writing data by utilizing exclusive or check disk array |
| CN101763220B (en) * | 2008-12-25 | 2011-06-08 | 成都市华为赛门铁克科技有限公司 | Data updating method, controller and storage system |
| CN102096558A (en) * | 2011-01-20 | 2011-06-15 | 杭州华三通信技术有限公司 | Data storage method and device |
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| CN101763220B (en) * | 2008-12-25 | 2011-06-08 | 成都市华为赛门铁克科技有限公司 | Data updating method, controller and storage system |
| CN101650675A (en) * | 2009-08-28 | 2010-02-17 | 中兴通讯股份有限公司 | Method and device for writing data by utilizing exclusive or check disk array |
| CN102096558A (en) * | 2011-01-20 | 2011-06-15 | 杭州华三通信技术有限公司 | Data storage method and device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110413203A (en) * | 2018-04-28 | 2019-11-05 | 伊姆西Ip控股有限责任公司 | For managing the method, equipment and computer program product of storage system |
| CN110413203B (en) * | 2018-04-28 | 2023-07-18 | 伊姆西Ip控股有限责任公司 | Method, apparatus and computer readable medium for managing a storage system |
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