CN102141896A - Disk array system - Google Patents
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- CN102141896A CN102141896A CN2010101054975A CN201010105497A CN102141896A CN 102141896 A CN102141896 A CN 102141896A CN 2010101054975 A CN2010101054975 A CN 2010101054975A CN 201010105497 A CN201010105497 A CN 201010105497A CN 102141896 A CN102141896 A CN 102141896A
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Abstract
The invention discloses a disk array system. The disk array system comprises a plurality of data storage units and a parity storage medium, wherein the parity storage medium can be single storage hardware or a logic storage module consisting of a plurality of storage units; a disk array is formed by matching the parity storage medium and the data storage units; the parity storage medium is used for storing parity check code information of the disk array; and a first writing speed of the parity storage medium is higher than a second writing speed of each data storage unit. The disk array system with high random writing speed can be constructed with lower setting cost.
Description
Technical field
The present invention relates to a kind of disc array system, and particularly relevant a kind of disc array system of random writing speed faster that has.
Background technology
Along with the universal development of numeral science and technology, with closely bound up various files, archives, letter even personal information or the various multimedia video information common numbersization of living.Storage and transmission that various important personal data, corporate facility archives or even governments file and all rely on electronic system.Yet the digital memeory device that general PC is used is generally single hardware (Hard drive).The finite capacity of single hardware, and it writes the restriction that also is subjected to its hardware structure (as read/write head, the rotation speed of hard disk, bus bandwidth) with reading speed, and certain speed bottle-neck is arranged.In addition, in case can't provide enough degree of stability and reliability mostly when single hardware meets with outage or suffers virus, assault, wherein Cun Chu important information may be difficult to fetch.
At present on the market; as seen cross the threshold or the various memory storages of senior application at various; disk array (the Redundant Array oI IndependentDisks that for example has mirrored storage and file reparation and defencive function; RAID) system; it can cooperate independently disk array controller; with specific algorithm important archive files is properly stored, enlarged global storage space, the quickening read or write speed of disc array system whereby or file rescue function is provided when file is damaged.
Present this disk array memory storage is widely used in government bodies, financial industry even individual's application scenario, yet be in response to various application scenario, and producing different demand (as space size, speed, utilization ratio and data security), present existing disk array has been developed multiple different algorithm and disk array framework.
Early stage first kind disk array (RAID 1) is directly to adopt mirror image (mirror) mode, all data are copied in the mirror image hard disk fully, though security is high like this, the equivalent service efficiency of storage space is on the low side, only be 50% in this example, and write lifting.Wherein, if reach the function of file reparation and keep higher space efficiency, usually utilize particular storage to preserve wrong identifying code (errordetecting code), wherein the wrong identifying code of the 3rd class disk array (RAID 3) and the 4th class disk array (RAID 4) mainly adopts the same bit authorization information (parityinformation) that is verified as the basis with odd even, for example: with bit checking bit (parity bit) or with bit checking piece (parity block).
If with the 3rd class disk array (RAID 3) or the 4th class disk array (RAID4) that four group hard discs are formed, in general, its an appointment wherein group hard disc is with the bit hard disk, and utilizes three group hard discs as the data hard disk.The 3rd class disk array and the 4th class disk array can utilize the same bit identifying code that needs with the rescue of bit hard-disc storage data, when any one group of data hard disk corruptions wherein, can by other the data hard disk with the bit hard disk its content is reduced again, and the equivalent service efficiency of storage space is higher.
The disk array framework of the 3rd class disk array and the 4th this type of class disk array, though good performance is all arranged in order read-write with reading at random, the bottleneck of its random writing speed just mainly is subject to the writing speed with the bit hard disk.
In comparison, another kind of disk array framework, the 5th class disk array (RAID 5) adopts the same bit identifying code of cycle type to distribute, that is to say, broken up mean allocation in the middle of each hard disk with the bit identifying code, manage by the suitable scheduling that writes, the 5th class disk array can reach preferable random writing speed.Yet it distributes the 5th class disk array because of disperseing not manageability with the bit identifying code, and also complexity comparatively of the algorithm of its data management during with wrong reduction, and is relative higher on the difficulty in the system maintenance and acquisition cost.
Summary of the invention
At problems of the prior art, the present invention proposes a kind of disc array system, it adopts entity hard disk conduct fast with the bit storage unit, or set up a sub-disk array with as the high speed of logical formula with the bit memory module so that can be lower the disc array system that cost structure goes out to have high random writing speed is set.
A category of the present invention is to provide a kind of disc array system.
According to a specific embodiment, disc array system comprises a plurality of data storage cells and bit storage unit together.Wherein, should cooperate described data storage cell to form a disk array with the bit storage unit, should be with the bit storage unit in order to store the together bit verification code information of this disk array, wherein should be with one first writing speed of bit storage unit one second writing speed greater than each data storage cell.
According to another specific embodiment, disc array system comprises a plurality of data storage cells and bit memory module together.Wherein, should cooperate described data storage cell to form one first disk array with the bit memory module, should be with the bit memory module in order to store the together bit verification code information of this first disk array, should comprise a plurality of with the bit memory module with the bit storage unit, should form a second disk array with the bit storage unit with described in the bit memory module, this is with one first writing speed of its integral body of bit memory module, one second writing speed greater than each data storage cell.
Compared to prior art, disc array system of the present invention, its the entity stores medium conduct that can adopt single high speed is with the bit storage unit, or also can adopt sub-disk array that a plurality of mediums form same bit memory module as logicality, make whereby with the writing speed of bit storage writing speed greater than other data storage, thus, just can be lower the disc array system that cost structure goes out to have high random writing speed is set.
Can be further understood by following detailed Description Of The Invention and appended accompanying drawing about the advantages and spirit of the present invention.
Description of drawings
Fig. 1 illustrates the synoptic diagram according to disc array system in first specific embodiment of the present invention.
Fig. 2 illustrates the synoptic diagram according to disc array system in second specific embodiment of the present invention.
Wherein, description of reference numerals is as follows:
1,3: disc array system 10: with the bit storage unit
30: with the bit memory module
18,38,306: disk array controller
12,14,16,32,34,36: data storage cell
P0～Pn: with bit identifying code D01～Dn3: file data
Embodiment
See also Fig. 1, Fig. 1 illustrates the synoptic diagram according to disc array system 1 in first specific embodiment of the present invention.As shown in Figure 1, disc array system 1 comprises together bit storage unit 10, a plurality of data storage cell and disk array controller 18, in this embodiment, disc array system 1 comprises three groups of data storage cells 12,14 and 16 altogether, but the present invention is not as limit, in the practical application, the size requirement of the visual storage space of quantity of the data storage cell of disc array system 1, various individual factor adjustment such as funds, application purpose are set, it is well known to those skilled in the art.Disk array controller 18 can couple respectively with bit storage unit 10 and described data storage cell 12,14 and 16, and disk array controller 18 reads or write the instruction of said storing medium in order to execution.
In the example shown in Fig. 1, can be respectively a hard disk, cooperate described data storage cell to form a disk array with bit storage unit 10 with bit storage unit 10 and data storage cell (12,14 and 16).In this embodiment, with bit storage unit 10 and described data storage cell 12,14,16 its frameworks of formed disk array can be the 3rd class disk array (RAID 3) that adopts bit stored interleaved (Bit-interleaving) technology or the 4th class disk array (RAID 4) that adopts piece stored interleaved (Block-interleaving) technology.
Under the framework of the 3rd class disk array and the 4th class disk array, it mainly is stored to various file datas three data storage unit (12,14 and 16), and can utilize the same bit verification code information that needs with the rescue of bit storage unit 10 storage data (as the same bit identifying code P0 among Fig. 1～Pn), in the practical application, can be with bit checking bit (parity bit) or with bit checking piece (parity block) with bit verification code information (parity information).For example in Fig. 1, with in the bit storage unit 10 one of them with bit identifying code P0, promptly in order to the file data D01 in the corresponding data storage unit 12, file data D02 in the data storage cell 14 and the file data D03 in the data storage cell 16.
In like manner, with bit identifying code Px, can distinguish file data Dx1, Dx2 and Dx3 in the corresponding described data storage cell, wherein 0≤x≤n with in the bit storage unit 10 each.
When the hard disk corruptions of any one group of data storage cell wherein, can by other data storage cell with bit storage unit 10 content of its damage is reduced again, and the equivalent service efficiency of storage space is higher.On the other hand, when with the hard disk corruptions of bit storage unit 10, also can directly replace and produce again with the bit identifying code with bit storage unit 10.
The general existing disc array system that adopts RAID 3 or RAID 4 frameworks, when carrying out random writing, its writing speed performance is comparatively low.This is because the disc array system of RAID 3 or RAID 4 frameworks in the program that each file data writes, all needs making amendment with the bit identifying code with corresponding in the bit storage unit 10.
For example, desire to write the file data D11 in the data storage cell 12, just must revise in the lump with the same bit identifying code P1 in the bit storage unit 10; Then, the file data D32 as if desiring to write in the data storage cell 14 also must revise in the lump with the same bit identifying code P3 in the bit storage unit 10.Because of above-mentioned each other random writing program all needs to making amendment with bit storage unit 10, so single time point only can be carried out single random writing flow process.
That is to say that in above-mentioned random writing flow process, same time point only has two group hard disc reality carrying out write operation (with bit storage unit 10 and one group of data storage cell wherein), the hard disk of other two groups of data storage cells then is an idle state.
The disk array framework of the 3rd class disk array and the 4th this type of class disk array, its whole writing speed are influenced by this writing speed with bit storage unit 10 mainly.
What need special instruction is, disc array system 1 in the present invention is in order to address the above problem, select the medium of relative high speed for use with bit storage unit 10, for example in this embodiment, can adopt solid state hard disc (Solid State Drive with bit storage unit 10, SSD), present SSD hard disk is because of read or write speed and higher against shock performance are attracted attention faster.Yet, in general capacity is less because of present SSD hard disk, and cost is higher, if adopt the SSD hard disk to come framework whole magnetic disk array comprehensively, may not meet best cost benefit, in this embodiment, the same bit storage unit 10 of disc array system 1 can adopt the SSD hard disk, improves the random access speed of whole disc array system 1.
Wherein, at present common its random writing speed roughly of various mediums is as shown in table 1 below.
Table 1
| The medium title | Random writing speed (MB/ second) |
| The SSD hard disk | 100 |
| SAS hard disk (rotating speed 15000rpm) | 80 |
| SAS hard disk (rotating speed 10000rpm) | 50 |
| SATA hard disk (rotating speed 10000rpm) | 40 |
| SATA hard disk (rotating speed 7200rpm) | 30 |
| SATA hard disk (rotating speed 5400rpm) | 20 |
As shown in table 1, if adopt the SSD hard disk of high speed relatively, compare general jumbo SATA hard disk with bit storage unit 10, can reach its writing speed of three times to five times.
Yet of the present inventionly do not exceed with the SSD hard disk with bit storage unit 10, in the practical application, it also can adopt system for serial small computer interface (the Serial Attached SCSI of higher rotation speed, be called for short SAS) hard disk or Serial Advanced Technology Attachment (Serial Advanced Technology Attachment, abbreviate SAT A) hard disk, that is to say, when with first writing speed of bit storage unit 10 greater than other second writing speed of data storage cell (as jumbo SATA hard disk) of disc array system 1, just can reach the effect that improves random writing speed, and do not need mediums all in the disc array system 1 is replaced to expensive SSD hard disk or high rotating speed hard disk comprehensively, can avoid the cost that is provided with of disc array system 1 significantly to improve.
In the above-described embodiments, the same bit storage unit 10 in the disc array system 1 is to adopt single entity hard disk as medium at a high speed, yet the present invention is not as limit.In another specific embodiment, disc array system of the present invention can adopt also that a plurality of hard disks are common to form a sub-disk array, utilize this sub-disk array as the high speed of logicality with the bit memory module.
Fig. 2 illustrates the synoptic diagram according to disc array system 3 in second specific embodiment of the present invention.In disc array system shown in Figure 23, comprise in the disc array system 3 with bit memory module 30, data storage cell 32, data storage cell 34, data storage cell 36 and disk array controller 38.Wherein, form one first disk array with bit memory module 30, data storage cell 32, data storage cell 34 with data storage cell 36, first disk array can be the 3rd class disk array that adopts bit stored interleaved technology or the 4th class disk array that adopts piece stored interleaved technology, the framework of first disk array roughly to first specific embodiment of the present invention in similar, so do not give unnecessary details in addition at this.
Be that in the first specific embodiment difference the same bit memory module 30 in second specific embodiment comprises a plurality of with the bit storage unit, in the example of Fig. 2, comprise three altogether with bit storage unit 300,302,304 with bit memory module 30.And can further comprise respectively and the described disk array controller 306 that couples with bit storage unit (300,302,304) with bit memory module 30, wherein, describedly can form a second disk array with bit storage unit (300,302,304).
In the foregoing description, have the independent disk array controller 306 that is provided with bit memory module 30, but the present invention is not as limit.In another embodiment, disk array controller 306 can be integrated in the single process chip with disk array controller 38, or, disk array controller 306 and disk array controller 38 also can utilize specific software control procedure or firmware control program to add realization, the control method and the software and hardware architecture of disk array controller are well known to those skilled in the art, and do not give unnecessary details in addition at this.
What need special instruction is that the together bit verification code information of this first disk array just is stored in by in the middle of the second disk array that forms with bit storage unit 300,302,304.That is to say that first disk array of the present invention is convenient for the same bit memory module 30 of this second disk array (comprising with bit storage unit 300,302,304) as logicality.
Wherein, the second disk array can be the null class disk array (RAID 0) of data itemize (Data Stripping) technology, in the framework of null class disk array, do not have the redundancy backup function, but with the information of desiring to write, cutting N equal portions (being trisection in this example), and write described respectively with bit storage unit 300, in the middle of 302,304, make an appointment with whereby to reach single relatively its writing speed of three times of storage hardware.
For example in this embodiment, when comprising 3 altogether with bit memory module 30 during, be roughly 3 times with indivedual writing speeds of bit storage unit with bit memory module 30 its whole writing speeds with the bit storage unit.That is to say,, can be single N with its indivedual writing speeds of bit storage unit doubly, treat as the storage unit sum that comprises in the bit memory module 30 and decide with the whole writing speed of bit memory module 30 by the disk array framework of RAID 0.Thus, just can make second writing speed of first writing speed of same bit memory module 30 its integral body that constitute by the second disk array, and then can improve the random writing efficient of disc array system 3 much larger than data storage cell (32,34,36).
Among the present invention, with the same bit Number of Storage Units that bit memory module 30 is comprised, be not limited to 3, the whole writing speed of its visual actual needs is adjusted.
In this embodiment, above-mentioned with being respectively solid state hard disc, SAS hard disk, SATA hard disk or ide (Integrated DeviceElectronics, be called for short IDE) interface hard disk with the bit storage unit individually in the bit memory module 30.
In addition, the second disk array null class disk array (RAID 0) that also is not limited to can be with the data disk-striping strategy is formed.In another embodiment, the second disk array also can be combined (JBOD) disk array that forms with the logical combination technology.
In present practical application, less because of the solid state hard disc capacity if adopt solid state hard disc though writing speed is very fast as with the bit storage unit, storing the problem that off-capacity takes place with bit easily.If the second disk array that adopts the JBOD framework to form, a plurality of solid state hard discs are made up as with bit memory module 30 in the JBOD mode, just can make the memory capacity with bit memory module 30, equivalence is enlarged into the memory capacity summation of a plurality of solid state hard discs in the second disk array.Thus, it is too small just can to solve its capacity of solid state hard disc, is not suitable as the problem with the bit storage unit.
In sum, disc array system of the present invention, its the entity stores medium conduct that can adopt single high speed is with the bit storage unit, or also can adopt sub-disk array that a plurality of mediums form same bit memory module as logicality, make whereby with the writing speed of bit storage writing speed greater than other data storage, thus, just can be lower the disc array system that cost structure goes out to have high random writing speed is set.
By the above detailed description of preferred embodiments, hope can be known description feature of the present invention and spirit more, and is not to come protection scope of the present invention is limited with the above-mentioned preferred embodiment that is disclosed.On the contrary, its objective is that hope can contain various changes and have in the category of claim of being implemented on of identity property institute of the present invention desire application.
Claims (12)
1. disc array system comprises:
A plurality of data storage cells; And
Bit storage unit together, should cooperate described data storage cell to form a disk array with the bit storage unit, should be with the bit storage unit in order to store the together bit verification code information of this disk array, wherein should be with one first writing speed of bit storage unit one second writing speed greater than each data storage cell.
2. disc array system as claimed in claim 1 is characterized in that, this is a solid state hard disc, a SAS hard disk or a SATA hard disk with the bit storage unit.
3. disc array system as claimed in claim 1 is characterized in that, this disk array is the 3rd a class disk array of an employing bit stored interleaved technology.
4. disc array system as claimed in claim 1 is characterized in that, this disk array is the 4th a class disk array of an employing piece stored interleaved technology.
5. disc array system comprises:
A plurality of data storage cells; And
Bit memory module together, should cooperate described data storage cell to form one first disk array with the bit memory module, should be with the bit memory module in order to store the together bit verification code information of this first disk array, should comprise a plurality of with the bit memory module with the bit storage unit, should form a second disk array with the bit storage unit with described in the bit memory module, this is with one first writing speed of its integral body of bit memory module, one second writing speed greater than each data storage cell.
6. disc array system as claimed in claim 5 is characterized in that, this first disk array is the 3rd a class disk array of an employing bit stored interleaved technology.
7. disc array system as claimed in claim 5 is characterized in that, this first disk array is the 4th a class disk array of an employing piece stored interleaved technology.
8. disc array system as claimed in claim 5 is characterized in that, this second disk array is the null class disk array of a data disk-striping strategy.
9. disc array system as claimed in claim 8, it is characterized in that, should comprise N altogether with the bit storage unit with the bit memory module, the N that this this first writing speed with its integral body of bit memory module is roughly a described other writing speed with the bit storage unit doubly.
10. disc array system as claimed in claim 8 is characterized in that, the described of this second disk array is not a solid state hard disc, a SAS hard disk, a SATA hard disk or an ide interface hard disk with the bit sub memory cell.
11. disc array system as claimed in claim 5 is characterized in that, this second disk array is the combined disk array of an employing logical combination technology.
12. disc array system as claimed in claim 11 is characterized in that, the described of this second disk array is not a solid state hard disc with the bit sub memory cell.
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| CN2010101054975A CN102141896A (en) | 2010-01-28 | 2010-01-28 | Disk array system |
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| CN2010101054975A CN102141896A (en) | 2010-01-28 | 2010-01-28 | Disk array system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103294412A (en) * | 2012-03-01 | 2013-09-11 | Hgst荷兰公司 | Implementing large block random write hot spare SSD for SMR RAID |
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| US5889795A (en) * | 1995-04-21 | 1999-03-30 | International Business Machines Corporation | Disk array system and method for storing data |
| JP2004021811A (en) * | 2002-06-19 | 2004-01-22 | Hitachi Ltd | Disk controller using nonvolatile memory |
| US20070233944A1 (en) * | 2006-03-28 | 2007-10-04 | Hitachi, Ltd. | Storage control device, and control method for storage control device |
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2010
- 2010-01-28 CN CN2010101054975A patent/CN102141896A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5889795A (en) * | 1995-04-21 | 1999-03-30 | International Business Machines Corporation | Disk array system and method for storing data |
| JP2004021811A (en) * | 2002-06-19 | 2004-01-22 | Hitachi Ltd | Disk controller using nonvolatile memory |
| US20070233944A1 (en) * | 2006-03-28 | 2007-10-04 | Hitachi, Ltd. | Storage control device, and control method for storage control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103294412A (en) * | 2012-03-01 | 2013-09-11 | Hgst荷兰公司 | Implementing large block random write hot spare SSD for SMR RAID |
| CN103294412B (en) * | 2012-03-01 | 2018-02-16 | Hgst荷兰公司 | Realize the bulk random writing Hot Spare solid-state drive for tiles magnet record |
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Application publication date: 20110803 |