CN1862479A - Magnetic disk array data configuration structure and data acces method thereof - Google Patents
Magnetic disk array data configuration structure and data acces method thereof Download PDFInfo
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Abstract
The present invention relates to a data layout structure of magnetic disk array and its data access method. Its magnetic disk array includes at least three magnetic disks, every magnetic disk respectively at least contains a storage zone block, every storage zone block respectively has several substorage zone blocks; in which a storage zone block selected from storage zone blocks whose positions are correspondent in every magnetic disk can be used as a check zone block, and every substorage zone block in said check zone block can be respectively used as sub check zone block which is respectively used for storing check data. The check zone blocks can be formed into a circulation layout between magnetic disks. Besides, said invention also provides the concrete steps of its data access method.
Description
Technical field
The present invention is relevant for a kind of data configuration structure and data access method thereof of disk array, but refer to a kind of expedited data access especially and have the data configuration structure and the data access method thereof of the disk array of data validation function, each disk planning there is at least one memory block, and each memory block is subdivided into a plurality of subpool pieces, cooperate the setting check block, and each corresponding subpool piece of parallel access and effectively promote the efficient of disk array simultaneously.
Background technology
Along with making rapid progress of electronic technology, the execution speed of main elements such as the CPU (central processing unit) of computing machine, north bridge chips, South Bridge chip or storer is other elements in the system.Wherein, hard disk is because of constructional congenital restriction, and when read-write, the mechanical displacement operation of its read/write head and speed of rotation of data disc or the like problem need expend many quality time, so often become the bottleneck place of computer system operation efficient; Because of the relation of mechanical realization and disc surface magnetisable material, make and be subjected to certain restriction its serviceable life again.Therefore, data of how effectively to save the user from damage and being stored and promote the speed that its access is handled have become one of dealer institute focus now.
General existing disk array (Redundant Arrays ofIndependent Drives with fault tolerance; RAID) 11, as shown in Figure 1.It mainly is that a disk array controller 13 is electrically connected a redundant array of inexpensive disks 11, and redundant array of inexpensive disks 11 includes three disks, and the attached respectively primary importance numbering of giving, i.e. disk number, for example: disk A, disk B and disk C etc.Data space in each disk is divided a plurality of memory block (block), and the attached respectively second place numbering of giving, for example: 0 to 2 memory block etc.So, just can be with each primary importance numbering A, B and C and each second place numbering 0 to 2 etc., be combined in this redundant array of inexpensive disks 11 one respectively in order to discern the Position Number of each memory block, for example: memory block A0 to A2, memory block B0 to B2 and memory block C0 to C2 etc.
Wherein, the corresponding parity data of being stored in memory block A0 and the memory block B0 of block data is stored in the memory block C0.The corresponding parity data of being stored in memory block A1 and the memory block C1 of block data is stored in the memory block B1.And the corresponding parity data of being stored in memory block B2 and the memory block C2 of block data is stored in the memory block A2.
Above-mentioned existing redundant array of inexpensive disks 11 with fault tolerance though its overall efficiency is higher than general disk, when reality is carried out read operation, still has the idle situation generation of disk and can't give full play to its maximum efficiency.For example: during memory block B0 in memory block A0 in the operation system wants reading disk A and the disk B, disk array controller 13 can read memory block A0 and memory block C0 simultaneously, but can't read memory block B0 simultaneously, promptly this disk B is in idle situation at this moment.This is because memory block A0 and both parity datas of memory block B0 are stored among this memory block C0, when disk array controller 13 when reading memory block A0, the parity data that must read simultaneously in the memory block C0 carries out checking of data.And disk array controller 13 also need read memory block C0 simultaneously to carry out data validation when desiring to read memory block B0.Yet under this situation, disk C cooperates disk A operation earlier, can't cooperate disk B operation certainly again.So disk B just is in idle situation naturally at this moment, make existing redundant array of inexpensive disks 11 can't effectively promote its reading efficiency with fault tolerance.
Summary of the invention
For this reason, how at the existing shortcoming of above-mentioned existing disk array, with data configuration structure and the collocation method thereof of designing a kind of disk array, can make a disk array controller each line storage of concurrent reading and concurrent writing simultaneously, and then effectively promoting the efficient of disk array integrated operation, this is invention emphasis of the present invention.
Fundamental purpose of the present invention is to provide a kind of data configuration structure and collocation method thereof of disk array, have one to check block the memory block planning of correspondence position in each disk, and each memory block is subdivided into a plurality of subpool pieces, each disk of concurrent reading and concurrent writing and effectively promote the efficient of disk array simultaneously.
Another purpose of the present invention is to provide a kind of data configuration structure and collocation method thereof of disk array, by reading while write the data configuration of each disk, not only help to promote its read-write efficiency, more can prevent the excessive for a long time execution read-write operation of a certain disk and cause damage.
For reaching above-mentioned purpose, the invention provides a kind of data configuration structure of disk array, disk array includes at least three disks, and each disk includes respectively: at least one memory block, and each memory block has a plurality of subpool pieces respectively; Wherein, the corresponding memory block in position selects wherein that a memory block checks block as one in each disk, and remaining described memory block is then as an actual data storage unit; Checking in the block each subpool piece becomes a son respectively and checks block, and described son checks block respectively in order to store in this actual data storage unit the data that check of data in the corresponding described subpool piece in position; And this checks the selected of block is to form a loop configuration between each disk.
The data configuration structure of disk array of the present invention, the access with data in the described actual data storage unit of opposite position are the mode accesses according to disk array grade 0.
The data configuration structure of disk array of the present invention, the size of each subpool piece are the size of the data striping in this disk array grade 0.
The data configuration structure of disk array of the present invention, this disk array connects an information main frame by a disk array controller.
The present invention also provides a kind of data access method of disk array, and its key step includes: provide one to write instruction and one write data; This is write data cut into a plurality of data stripings; Produce corresponding one minute band respectively by described data striping in regular turn and check data corresponding to an actual data storage number of disks that the unit includes; And in regular turn each group is with corresponding to the described data striping of this actual data storage number of disks that the unit includes and pairing this branch thereof and is checked this subpool piece and pairing this son thereof that data parallel writes each disk correspondence position in the actual data storage unit and check block.
The data access method of disk array of the present invention, the size of each data striping equates with the amount of capacity of this subpool piece.
The data access method of disk array of the present invention, each minute is with the size that checks data to equate with the amount of capacity that this son checks block.
The data access method of disk array of the present invention also includes the following step: a reading command is provided; Check this branchs in the block and be with and check data according to parallel respectively described data striping in the corresponding described subpool piece and pairing this son thereof of reading of this reading command; Carrying out this data striping and this branch is with the checking that checks data to check; And integrate the described data striping that is read and be back to an information main frame.
The present invention provides a kind of data access method of disk array in addition, be applicable to that the wheel with at least three disks changes the parity disk array, comprise the following steps: in described disk, to provide respectively at least one memory block, have at least one memory block between different disk respectively and have opposite position, and wherein this memory block with opposite position of a disk checks block as one; Make the described memory block of opposite position have a plurality of subpool pieces respectively, and make opposite position this check block and have a plurality of sons and check block; Writing data with one cuts into a plurality of data stripings and checks the outer described subpool piece of block to deposit the described son with opposite position respectively in; And the described data striping of being stored in the described subpool piece according to opposite position produces one and checks data and check block with this son that deposits opposite position in.
The data access method of disk array of the present invention, the size of this data striping equates with the amount of capacity of this subpool piece.
The data access method of disk array of the present invention, this size that checks data equates with the amount of capacity that son checks block.
The data configuration structure of disk array provided by the invention and data access method thereof, simultaneously each corresponding subpool piece of parallel access and effectively promote the efficient of disk array.
Description of drawings
Fig. 1 is existing synoptic diagram with disk array of fault tolerance.
Fig. 2 A is the data configuration structure synoptic diagram of a preferred embodiment of the present invention disk array.
Fig. 2 B is the local enlarged diagram of the row memory block shown in Fig. 2 A.
Fig. 3 is the synoptic diagram that the present invention cuts data.
Fig. 4 is the synoptic diagram that the present invention one checks data operation.
Fig. 5 is the schematic flow sheet that writes of a preferred embodiment of the present invention data access method.
Fig. 6 is the schematic flow sheet that reads of a preferred embodiment of the present invention data access method.
Embodiment
Effect for enabling further to understand feature of the present invention, structure and reached is elaborated with preferred embodiment.
At first, see also Fig. 2 A, i.e. the data configuration structure of a preferred embodiment of the present invention disk array and collocation method synoptic diagram thereof.As shown in the figure, data configuration of the present invention mainly applies to include at least the disk array 21 of three disks, can connect an information main frame 25 by a disk array controller 23, and receive data that transmitted by this information main frame 25.With three disks is example, and each disk can define a disk number in regular turn, for example: disk A, disk B and disk C.
Each disk planning has n memory block, and each memory block has been defined a sequence numbering in regular turn, and for example: 0,1 to n.Each disk number A, B and C and each sequence numbering 0 to n are combined respectively, can make each memory block in each disk have its exclusive Position Number alone.For example: include memory block A0 among the disk A and include memory block B0 to memory block An, the disk B and to memory block Bn and disk C, include memory block C0 to memory block Cn.
For the convenient behavior of describing disk array, can respectively the memory block that each disk sequence numbering is identical in the disk array 21 be given in regular turn the column number of a memory block, for example memory block row 30 are to memory block row 3n.Wherein, select a memory block respectively in each memory block row 30 to 3n and check block, respectively in order to store in each memory block row 30 to 3n the data that check of the data of storing in other memory block as one.The selection that checks block in each memory block row 30 to 3n is that to be evenly distributed with each disk A to C be principle, also can make checking the distribution of determining in the district and forming one and take turns the sample attitude of changeing parity checking array (Rotating ParityArray).For example in memory block row 30 with memory block C0 for checking block; In the memory block row 31 with memory block B1 for checking block; In the memory block row 32 with memory block A2 for checking block; Again in memory block row 33 with memory block C3 for checking block or the like, change in regular turn and form one and take turns and change circulation.
Secondly, see also Fig. 2 B, promptly as the partial enlarged drawing of Fig. 2 A illustrated embodiment.As shown in the figure, be example with memory block row 30, wherein memory block C0 one checks block 41 and checks data in order to storage; Other two memory block A0 and B0 then can be considered an actual data storage unit 42, in order to the storage general data.And each memory block A0 to An, B0 to Bn and C0 to Cn plan respectively and are cut into a plurality of subpool pieces.Subpool piece in each memory block can be given a sub-serial number 0 respectively in regular turn to m, can clearly indicate the position at each subpool piece place in conjunction with the Position Number of the memory block under it.Memory block A0 includes subpool piece A00 to A0m; Memory block B0 includes subpool piece B00 to B0m; And memory block C0 includes subpool piece C00 to C0m etc.
Data configuration of the present invention is with disk array grade 0 (Redundant Arrays of IndependentDrives level 0 with the memory block A0 in this actual data storage unit 42 and B0; RAID 0) mode carry out the access of data.Wherein, each subpool piece A00 to A0m and B00 to B0m promptly correspond respectively to each data striping (data stripe) of data, and each son checks the branch band that block C00, C01 to C0m then store respectively corresponding to the data of storing among subpool piece A00 and B00, A01 and B01 to A0m and the B0m and checks data.
See also Fig. 5, it is the Stored Procedure synoptic diagram of a preferred embodiment of the present invention data access method.As shown in the figure, its main implementation step includes: write instruction and write data 510 by what the information main frame was transmitted by the disk array controller reception; Again data are cut into a plurality of data stripings 520; And the branch band that produces a correspondence respectively by the data striping corresponding to an actual data storage number of disks that the unit includes in regular turn checks data 530; In regular turn each group is checked subpool piece and the pairing son thereof that data parallel writes each disk correspondence position in the actual data storage unit corresponding to the data striping of actual data storage number of disks that the unit includes and pairing branch band thereof again and check block 540.
See also Fig. 3 and Fig. 4, the synoptic diagram that it is respectively the synoptic diagram of cutting data of the present invention and checks data operation.Above-mentioned steps 520 is this to be write data d cut into a plurality of data striping d0 to dx with the amount of capacity of single subpool piece.And in the step 530,, check data t0 so in regular turn two data stripings (as d0, d1) in these data d are obtained a corresponding branch band by a logical circuit 43 actuating logic computings because actual data storage unit (42) has included two disks.When holding step 540, then simultaneously this data striping d0, d1 and corresponding branch band thereof are checked data t0 and be written in parallel to actual data storage unit 42 respectively and check corresponding subdata memory block A00, B00 and C00 in the data storage cell 41.Repeat above-mentioned steps 530 to step 540, till data d is write disk array (21) fully.
In other words, utilize data configuration of the present invention, when this information main frame 25 (as computing machine) utilizes this disk array controller 23 when carrying out the data write activity, it is that the amount of capacity with a subpool piece is that the foundation of data striping is cut apart data, and inserts in regular turn in each actual data storage unit 42 with the principle of RAID0.Also promptly earlier insert A00, B00 in regular turn, be A01, B01 then, moreover be A02, B02 ... or the like.And when inserting general data, then in regular turn the data striping of desiring to insert A00 is carried out logical operation with the data striping of desiring to insert B00 and draws a corresponding branch band checking data, and this branch band is checked data insert corresponding son and check among the block C00, remaining generation that checks data with go into to fill out that the position can the rest may be inferred.
In addition, see also Fig. 6, it is the schematic flow sheet that reads of a preferred embodiment of the present invention data access method.As shown in the figure, its main implementation step includes: receive the reading command 610 that the information main frame is transmitted by disk array controller; Read the branch band that branch band data in the corresponding subpool piece and pairing son thereof check in the block and check data 620 according to this reading command is parallel respectively; Carry out data striping and check action 630 with the checking that divides band to check data; And integrate the data striping that is read and be back to information main frame 630.
Also promptly, when this information main frame 25 is carried out when reading action by disk array controller 23, data acess method that then can RADI0 makes each disk read simultaneously including the data striping in the subpool piece of desiring reading of data.And when reading each data striping, corresponding son checks branch band in the block and checks data and also can be read by affiliated disk, and the data of reading are verified checks.
From the above, utilize data configuration of the present invention, then each disk in the disk array is stored section data or storage and is checked section data and all can operate simultaneously when access data.So, can significantly promote the data access efficiency of disk array 21.And each disk is because of all can operating simultaneously, so do not have that excessive access takes place a certain disk and the situation of damaging.
In sum, when knowing data configuration structure and the data access method thereof of the present invention relevant for a kind of disk array, but refer to a kind of expedited data access especially and have the data configuration structure and the data access method thereof of the disk array of data validation function, each disk planning there is at least one memory block, and each memory block is subdivided into a plurality of subpool pieces, cooperate the setting check block, and each corresponding subpool piece of parallel access and effectively promote the efficient of disk array simultaneously.
The above only is a preferred embodiment of the present invention, be not to be used for limiting scope of the invention process, promptly, variation that is equal to and modification that the described shape of all scopes according to claims of the present invention, structure, feature and spirit are made all should be included in the scope of claims of the present invention.
Being simply described as follows of symbol in the accompanying drawing:
11: disk array
13: disk array controller
21: disk array
23: disk array controller
25: the information main frame
30～3n: memory block row
41: check block
42: the actual data storage unit
43: logical circuit
A0～An: each memory block of disk A
B0～Bn: each memory block of disk B
C0～Cn: each memory block of disk C.
Claims (11)
1. the data configuration structure of a disk array, this disk array includes at least three disks, it is characterized in that, and each disk includes respectively:
At least one memory block, and each memory block has a plurality of subpool pieces respectively; Wherein, the corresponding memory block in position selects wherein that a memory block checks block as one in each disk, and remaining described memory block is then as an actual data storage unit; Respectively checking in the block each subpool piece becomes a son respectively and checks block, and described son checks block respectively in order to store in this actual data storage unit the data that check of data in the corresponding described subpool piece in position; And this checks the selected of block is to form a loop configuration between each disk.
2. the data configuration structure of disk array according to claim 1 is characterized in that, the access with data in the described actual data storage unit of opposite position is the mode access according to disk array grade 0.
3. the data configuration structure of disk array according to claim 2 is characterized in that, the size of each subpool piece is the size of the data striping in this disk array grade 0.
4. the data configuration structure of disk array according to claim 1 is characterized in that, this disk array connects an information main frame by a disk array controller.
5. the data access method of a disk array according to claim 2 is characterized in that, this method key step includes:
Provide one to write instruction and one write data;
This is write data cut into a plurality of data stripings;
Produce corresponding one minute band respectively by described data striping in regular turn and check data corresponding to an actual data storage number of disks that the unit includes; And
In regular turn each group is with corresponding to the described data striping of this actual data storage number of disks that the unit includes and pairing this branch thereof and is checked this subpool piece and pairing this son thereof that data parallel writes each disk correspondence position in the actual data storage unit and check block.
6. the data access method of disk array according to claim 5 is characterized in that, the size of each data striping equates with the amount of capacity of this subpool piece.
7. the data access method of disk array according to claim 5 is characterized in that, each minute is with the size that checks data to equate with the amount of capacity that this son checks block.
8. the data access method of disk array according to claim 5 is characterized in that, also includes the following step:
One reading command is provided;
Check this branchs in the block and be with and check data according to parallel respectively described data striping in the corresponding described subpool piece and pairing this son thereof of reading of this reading command;
Carrying out this data striping and this branch is with the checking that checks data to check; And
Integrate the described data striping that is read and be back to an information main frame.
9. the data access method of a disk array is applicable to that the wheel with at least three disks changes the parity disk array, is characterized in that described method comprises the following steps:
At least one memory block is provided respectively in described disk, has at least one memory block between different disk respectively and have opposite position, and wherein this memory block with opposite position of a disk checks block as one;
Make the described memory block of opposite position have a plurality of subpool pieces respectively, and make opposite position this check block and have a plurality of sons and check block;
Writing data with one cuts into a plurality of data stripings and checks the outer described subpool piece of block to deposit the described son with opposite position respectively in; And
The described data striping generation one of being stored in the described subpool piece according to opposite position checks data and checks block with this son that deposits opposite position in.
10. the data access method of disk array according to claim 9 is characterized in that, the size of this data striping equates with the amount of capacity of this subpool piece.
11. the data access method of disk array according to claim 9 is characterized in that, this size that checks data equates with the amount of capacity that son checks block.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101825992A (en) * | 2010-04-08 | 2010-09-08 | 杭州华三通信技术有限公司 | Saving method of data and device thereof |
| CN103019880A (en) * | 2012-12-14 | 2013-04-03 | 华为技术有限公司 | Data verification method, storage device and storage system |
| CN103500076A (en) * | 2013-10-13 | 2014-01-08 | 张维加 | Novel USB protocol computer accelerating device based on multi-channel SLC NAND and DRAM cache memory |
| CN110457720A (en) * | 2018-05-07 | 2019-11-15 | 技嘉科技股份有限公司 | The execution method that plate member checks device, checks device and checks system |
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| US6704837B2 (en) * | 1998-06-29 | 2004-03-09 | International Business Machines Corporation | Method and apparatus for increasing RAID write performance by maintaining a full track write counter |
| US6718435B2 (en) * | 2001-08-14 | 2004-04-06 | International Business Machines Corporation | Method and system for migrating data in a raid logical drive migration |
| CN1553345A (en) * | 2003-06-06 | 2004-12-08 | 英业达股份有限公司 | Multireel disc array managing method and system |
| CN100419700C (en) * | 2004-02-11 | 2008-09-17 | 鸿富锦精密工业（深圳）有限公司 | Disk faulttolerant system and method |
| US20060123312A1 (en) * | 2004-11-19 | 2006-06-08 | International Business Machines Corporation | Method and system for increasing parallelism of disk accesses when restoring data in a disk array system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825992A (en) * | 2010-04-08 | 2010-09-08 | 杭州华三通信技术有限公司 | Saving method of data and device thereof |
| CN101825992B (en) * | 2010-04-08 | 2012-07-11 | 杭州华三通信技术有限公司 | Saving method of data and device thereof |
| CN103019880A (en) * | 2012-12-14 | 2013-04-03 | 华为技术有限公司 | Data verification method, storage device and storage system |
| CN103019880B (en) * | 2012-12-14 | 2016-06-29 | 华为技术有限公司 | A kind of data verification method and storage device, storage system |
| CN103500076A (en) * | 2013-10-13 | 2014-01-08 | 张维加 | Novel USB protocol computer accelerating device based on multi-channel SLC NAND and DRAM cache memory |
| CN110457720A (en) * | 2018-05-07 | 2019-11-15 | 技嘉科技股份有限公司 | The execution method that plate member checks device, checks device and checks system |
| CN110457720B (en) * | 2018-05-07 | 2023-01-24 | 技嘉科技股份有限公司 | Plate element checking device, checking device and execution method of checking system |
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