CN102135862B - Disk storage system and data access method thereof - Google Patents
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Abstract
The invention discloses a disk storage system and a data access method thereof; the system comprises a management scheduler module, a copy layer control module, an RAIDA (Redundant Array of Independent Disk) layer control module and a physical layer control module, wherein the management scheduler module establishes the RAID of the RAID layer according to the disk in a physical layer, divides RAID partitions and establishes a logical volume of a copy layer according to the RAID partitions; the copy layer control module submits a command for accessing data on corresponding RAID partitions to the RAID layer control module by using the data access operation of equipment on the logical volume of the copy layer; the RAID layer control module submits a command for accessing data on corresponding physical disk to the physical layer control module when receiving the command for accessing the data by the copy layer control module; and the physical layer control module carries out the operation of accessing data to the corresponding physical disk when receiving the command for accessing the data by the RAID layer control module. In the invention, the reliability of data storage through multi-layer data redundancy frameworks is improved.
Description
Technical field
The present invention relates to computing machine and network information memory technology, relate in particular to disk storage system and data access method thereof in computing machine or the network equipment.
Background technology
Raid-array (RAID, Redundant Array of Independent Disks) technology, N platform hard disk to be formed the jumbo hard disk of virtual separate unit by RAID controller (being realized by hardware or software) use, be characterized in quickening to N platform hard disk while reading speed and fault-tolerance is provided, mainly comprise several type standards of RAID0～RAID6.
In all kinds of storage mediums, disk unit is owing to having adopted motor-driven, so failure rate is the highest, and mean time between failures (MTBF, Mean Time Between Failure) index is also minimum, therefore uses the disk protect technology most important.Using the RAID technology is for the protected data in the situation that disk breaks down.When fault occured, according to the employed RAID type of user, the data on the failed disk can regenerate by the mode that proof test value calculates or copies from mirror drive.
Just produced and adopted period in the RAID technology, single disk size generally only has several GB, therefore the RAID reconstruction time only needed to finish in tens of minutes to one hour usually.But constantly increase the unit storage density of disk unit along with disk unit manufacturer, SATA (the Serial Advanced Technology Attachment that 2TB (1TB=1024GB) arranged at present, the hard-disk interface standard) disk, and the high-capacity disk of 4TB also can occur in the end of the year 2010; Even if high performance SAS (Serial Attached SCSI, SCSI are Small Computer System Interface) disk and optical-fibre channel disk are also developing to single disk high power capacity (600GB).When these high-capacity disks were carried out data reconstruction, reconstruction time may reach a few hours even a couple of days; And, read and write continually for a long time that data cause the situation of disk failure also more and more common on the disk.This shows, common high-capacity disk adopts the weakness of traditional RAID technology particularly evident.
At present, most high-end storage systems nowadays that are comprised of high-end disk array stride forward to PB level (1PB=1024TB) memory capacity, and its number of disks has also arrived hundreds of; And most high-end disk arrays are still taked traditional RAID technology, and it is more outstanding that its intrinsic reliability defective shows in face of hundreds of number of disks and PB level memory capacity.
Therefore, no matter be for growing common high-capacity disk system, or for the high-end storage systems nowadays situation very high to the data reliability requirement, all need existing data storage technology is improved, effectively to improve the disk storage the reliability of the data.
Summary of the invention
Technical matters to be solved by this invention provides a kind of disk storage system and data access method thereof, can improve the reliability of data storage.
In order to solve the problems of the technologies described above, the invention provides a kind of disk storage system, comprise management and dispatching module and the copy layer control module that is connected respectively with this management and dispatching module, raid-array RAID layer control module, Physical layer control module, wherein:
The management and dispatching module is used for scheduling copy layer control module, RAID layer control module and Physical layer control module; By providing management interface in the RAID that creates the RAID layer, to set corresponding RAID grade, and divide the RAID subregion; Be that corresponding application apparatus is set the copy redundancy strategy in the logical volume of layer that creates a Copy;
Copy layer control module is used for according to the data access operation of application apparatus to copy layer logical volume, submits the instruction of visit data on corresponding RAID subregion to RAID layer control module;
RAID layer control module is used for when receiving the instruction of copy layer control module visit data, submits the instruction of visit data on corresponding physical hard disk to the Physical layer control module;
The Physical layer control module is used for when receiving the instruction of RAID layer control module visit data, to the conduct interviews operation of data of corresponding physical hard disk.
Further,
The copy redundancy strategy of setting by management interface comprises single replication policy and/or many replication policies, wherein:
Single replication policy, the RAID number of partitions that logical volume comprises is at least two, and any data all will be written in two RAID subregions when writing logical volume simultaneously;
It is individual that the RAID number of partitions that many replication policies, logical volume comprise is at least (n+1), and any data all will be written in (n+1) individual RAID subregion when writing logical volume simultaneously; N 〉=2 wherein.
Further,
The RAID grade that copy layer control module set according to the user for the data writing operation of application apparatus to corresponding logical volume, is submitted the instruction of writing data at corresponding RAID subregion to RAID layer control module;
RAID layer control module write the instruction of data and submitted the instruction of writing data at corresponding disk to the Physical layer control module to according to the copy redundancy strategy that the user sets for copy layer control module;
The Physical layer control module is write the instruction of data corresponding one or more physical hard disks is carried out data writing operation according to RAID layer control module.
Further,
The RAID grade that copy layer control module set according to the user, for the read data operation of application apparatus to corresponding logical volume, submit the instruction of read data on corresponding RAID subregion to RAID layer control module, and the data that this RAID layer control module is returned return to application apparatus;
The copy redundancy strategy that RAID layer control module set according to the user, submit the instruction of read data on corresponding disk for the instruction of copy layer control module read data to the Physical layer control module to, and the data that this Physical layer control module reads are returned to copy layer control module;
The Physical layer control module is carried out the read data operation according to the instruction of RAID layer control module read data to corresponding one or more physical hard disks, and the data that read are returned to this RAID layer control module.
In order to solve the problems of the technologies described above, the invention provides the method that a kind of foregoing disk storage system carries out data access, comprising:
Create the RAID of raid-array RAID layer for the physical disk of Physical layer by management interface, set simultaneously corresponding RAID grade, and division RAID subregion, for RAID partition creating logical volume, and distribute to corresponding application apparatus, set the copy redundancy strategy for application apparatus simultaneously;
The data access of corresponding logical volume is converted application apparatus to corresponding RAID subregion data access; And will convert to the data access of RAID subregion data access to corresponding physical disk to.
Further, the copy redundancy strategy of setting for application apparatus comprises single replication policy and/or many replication policies, wherein:
Single replication policy, the RAID number of partitions that logical volume comprises is at least two, and any data all will be written in two RAID subregions when writing logical volume simultaneously;
It is individual that the RAID number of partitions that many replication policies, logical volume comprise is at least (n+1), and any data all will be written in (n+1) individual RAID subregion when writing logical volume simultaneously; N 〉=2 wherein.
Further, the data access of corresponding logical volume is converted application apparatus to corresponding RAID subregion data access, specifically comprises:
Set the RAID grade with the data writing operation of application apparatus to copy layer respective logic volume according to the user, convert the data writing operation to the corresponding RAID subregion of RAID layer to; Perhaps, with the read data operation of application apparatus to the corresponding logical volume of copy layer, convert the read data operation to the corresponding RAID subregion of RAID layer to.
Further, will convert to the data access of RAID subregion the data access to corresponding physical disk to, specifically comprise:
Copy redundancy strategy according to the user sets will convert to the data writing operation of the corresponding RAID subregion of RAID layer the data writing operation to the corresponding one or more disks of described Physical layer to; The read data that perhaps, will convert to the corresponding one or more disks of Physical layer the read data operation of the corresponding RAID subregion of RAID layer operates.
Further, the method also comprises:
To return to application apparatus from the data that read of the corresponding one or more disks of Physical layer.
The present invention is directed to the high-end storage systems nowadays situation high to the data reliability requirement, RAID technology and copy technology are combined, disk storage system with multi-level data redundancy framework is provided, and by the copy redundancy strategy data are stored on each level all can to realize redundancy, improve thus the reliability of data storage.
Description of drawings
Fig. 1 is the multi-level data redundancy configuration diagram that the present invention is divided into disk storage system:
Fig. 2 is the structured flowchart of disk storage system embodiment of the present invention;
Fig. 3 is the embodiment of the method process flow diagram that disk storage system of the present invention reads and writes data.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment technical scheme of the present invention is at length set forth.The embodiment that below exemplifies only is used for description and interpretation the present invention, and does not consist of the restriction to technical solution of the present invention.
The present invention for high-end storage systems nowadays is managed efficiently with high reliability read and write data, traditional RAID technology is combined with the copy technology, disk storage system is divided into a plurality of data redundancy layers, as shown in Figure 1, mainly comprise following three levels:
Physical layer: be in the bottom of data redundancy framework, comprise the polylith physical disk;
RAID layer: the middle layer that is in the data redundancy framework, comprise one or more RAID groups (RAID group 1～RAID group n), each RAID group comprises one or more RAID subregions, the RAID that each RAID subregion is comprised of one or more physical disk in the Physical layer;
The copy layer: comprise the one or more logical volumes (logical volume 1～logical volume m) that offer application apparatus and read and write data, each logical volume is comprised of one or more RAID subregions of the different RAID groups of ownership.
Application apparatus adopts the copy redundancy strategy to use the interior RAID subregion of logical volume.The copy redundancy strategy has defined the use-pattern of the RAID subregion in the logical volume, comprising:
(1) zero copy (ZeroCopy) strategy
Copy amount: Copy Number=0, copy redundance: Copy Redundant=0;
The RAID number of partitions that the logical volume of use zero replication policy comprises is at least one, and any data only write a copy in logical volume;
Zero replication policy is not realized data redundancy in the copy layer, only rely on the RAID technology and realize the data redundancy protection.
Should be applicable to the application scenarios not high to the data reliability requirement by zero replication policy, such as common Streaming Media storage.
(2) single copy (SingleCopy) strategy
Copy amount: Copy Number=1, copy redundance: Copy Redundant=1;
The RAID number of partitions of using the logical volume of single replication policy to comprise is at least two, and any data all will be written in two RAID subregions when writing logical volume simultaneously, realizes that the copy layer data is redundant;
Single replication policy allows single RAID partition failure when realizing the data redundancy protection in the copy layer.
This list replication policy is applicable to service application scene that the data redundancy is had relatively high expectations, such as the data storage of engineering calculation, three-dimensional drawing and telecommunications etc.
(3) many copies (MultiCopy) strategy
Copy amount: Copy Number=n, copy redundance: Copy Redundant=n, wherein n 〉=2;
It is individual that the RAID number of partitions of using the logical volume of many replication policies to comprise is at least (n+1), and any data all will be written in (n+1) individual RAID subregion when writing logical volume simultaneously, realizes that the copy layer data is redundant;
Many replication policies allow n RAID partition failure when realizing the data redundancy protection in the copy layer.
These many replication policies are applicable to the data redundancy is required high application scenarios, such as the data storage of Aero-Space, financial transaction system.
For above-mentioned a plurality of data redundancy layer architectures, the invention provides disk storage system embodiment, its structure as shown in Figure 2, the copy layer control module, RAID layer control module and the Physical layer control module that comprise the management and dispatching module, be connected respectively with this management and dispatching module, wherein:
The management and dispatching module is used for providing the management interface of disk storage system, and manages and scheduling copy layer control module, RAID layer control module and Physical layer control module;
Copy layer control module is used for according to the operation of application apparatus to copy layer logical volume visit data, submits the instruction of visit data on corresponding RAID subregion to RAID layer control module;
RAID layer control module is used for when receiving the instruction of copy layer control module visit data, submits the instruction of visit data on corresponding physical hard disk to the Physical layer control module;
The Physical layer control module, be used for receive the instruction of RAID layer control module visit data the time, to the conduct interviews operation of data of corresponding physical hard disk.
In the above-described embodiments, application apparatus is personal computer for example, or is network application server;
The management and dispatching module provides management interface to the user of application apparatus, and the user passes through this management interface for the RAID on each disk establishment RAID layer in the Physical layer, and sets the RAID grade, divides simultaneously the RAID subregion; For the logical volume on the RAID partition creating copy layer, and distribute to application apparatus, for each application apparatus is set the copy redundancy strategy.
The copy redundancy strategy that the user sets comprises one or more in zero replication policy, single replication policy and the many replication policies, wherein:
The RAID number of partitions that the logical volume of use zero replication policy comprises is at least one, and any data only write a copy in logical volume;
The RAID number of partitions of using the logical volume of single replication policy to comprise is at least two, and any data all will be written in two RAID subregions when writing logical volume simultaneously;
It is individual that the RAID number of partitions of using the logical volume of many replication policies to comprise is at least (n+1), and any data all will be written in (n+1) individual RAID subregion when writing logical volume simultaneously.
The management and dispatching module all adopts default value separately in the situation that the user does not set copy redundancy strategy, RAID grade, for example is respectively and uses zero replication policy or single replication policy, and RAID 5.
The management interface that the management and dispatching module provides can adopt webpage (Web GUI, Graphical User Interface) form, also can adopt dos command line DOS interface (CLI, Command Line Interface) form.
The RAID grade that copy layer control module set according to the user for the data writing operation of application apparatus to corresponding one or more logical volumes, is submitted the instruction of writing data at corresponding RAID subregion to RAID layer control module; Perhaps for the read data operation of application apparatus to corresponding logical volume, submit the instruction of read data on corresponding RAID subregion to RAID layer control module, and the data that RAID layer control module returned return to application apparatus;
RAID layer control module write the instruction of data and submitted the instruction of writing data at corresponding disk to the Physical layer control module to according to the copy redundancy strategy that the user sets for copy layer control module; Perhaps, submit the instruction of read data on corresponding disk to the Physical layer control module for the instruction of copy layer control module read data, the data that the Physical layer control module is read return to copy layer control module;
The Physical layer control module is write the instruction of data corresponding one or more physical hard disks is carried out data writing operation according to RAID layer control module; Perhaps, according to the instruction of RAID layer control module read data corresponding one or more physical hard disks are carried out the read data operation, the data that read are returned to RAID layer control module.
The Physical layer control module can realize by hardware chip or integrated circuit board, also can realize by software.
The present invention is directed to above-mentioned disk storage system embodiment, data access method embodiment correspondingly also is provided, its flow process comprises the steps: as shown in Figure 3
110: the user creates RAID by the management interface of disc storaging system, divides the RAID subregion, for RAID partition creating logical volume, and distributes to corresponding application apparatus;
User's (being the keeper) also sets corresponding RAID grade when the management interface by disc storaging system is creating RAID; When creating logical volume, also set the copy redundancy strategy for each application apparatus, comprise in zero replication policy, single replication policy and the many replication policies one or more.
Application apparatus comprises one or more in personal computer, application server or other network equipment.
120: with the data access of application apparatus to corresponding logical volume on the copy layer, convert the data access to corresponding RAID subregion on the RAID layer to;
According to the user set the RAID grade with application apparatus to the data writing operation on the corresponding logical volume on the copy layer, convert to the data writing operation on the corresponding RAID subregion on the RAID layer; Perhaps, application apparatus to the read data on the corresponding logical volume on copy layer operation, is converted to the read data on the corresponding RAID subregion on the RAID layer is operated.
130: will to the data access of corresponding RAID subregion on the RAID layer, convert the data access to corresponding disk on the Physical layer to.
Copy redundancy strategy according to the user sets will convert to the data writing operation of corresponding RAID subregion on the RAID layer data writing operation to corresponding one or more disks on the Physical layer to; The read data that perhaps, will convert to corresponding one or more disks on the Physical layer the read data operation of corresponding RAID subregion on the RAID layer operates.
Said method embodiment also comprises:
To return to application apparatus from the data that read of corresponding one or more disks.
The present invention is directed to the high-end storage systems nowadays situation very high to the data reliability requirement, provide a kind of disk storage system of the tool multi-level data redundancy framework that traditional RAID technology and copy technology are combined, by setting the copy redundancy strategy, can make the data of storage on each level, all realize redundancy, improve thus the reliability of data storage.
Above explanation only is the better embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (9)
1. a disk storage system comprises management and dispatching module and the copy layer control module that is connected respectively with this management and dispatching module, raid-array RAID layer control module, Physical layer control module, wherein:
The management and dispatching module is used for scheduling copy layer control module, RAID layer control module and Physical layer control module; By providing management interface in the RAID that creates the RAID layer, to set corresponding RAID grade, and divide the RAID subregion; Be that corresponding application apparatus is set the copy redundancy strategy in the logical volume of layer that creates a Copy;
Copy layer control module is used for according to the data access operation of application apparatus to copy layer logical volume, submits the instruction of visit data on corresponding RAID subregion to RAID layer control module;
RAID layer control module is used for when receiving the instruction of copy layer control module visit data, submits the instruction of visit data on corresponding physical hard disk to the Physical layer control module;
The Physical layer control module is used for when receiving the instruction of RAID layer control module visit data, to the conduct interviews operation of data of corresponding physical hard disk.
2. according to system claimed in claim 1, it is characterized in that,
The described copy redundancy strategy of setting by described management interface comprises single replication policy and/or many replication policies, wherein:
Single replication policy, the RAID number of partitions that described logical volume comprises is at least two, and any data all will be written in two RAID subregions when writing logical volume simultaneously;
Many replication policies, it is individual that the RAID number of partitions that described logical volume comprises is at least (n+1), and any data all will be written in (n+1) individual RAID subregion when writing logical volume simultaneously; Wherein said n 〉=2.
3. according to claim 1 or 2 described systems, it is characterized in that,
The RAID grade that described copy layer control module set according to the user for the data writing operation of application apparatus to corresponding logical volume, is submitted the instruction of writing data at corresponding RAID subregion to described RAID layer control module;
Described RAID layer control module write the instruction of data and submitted the instruction of writing data at corresponding disk to described Physical layer control module to according to the copy redundancy strategy that the user sets for described copy layer control module;
The instruction that described Physical layer control module is write data according to described RAID layer control module is carried out data writing operation to corresponding one or more physical hard disks.
4. according to claim 1 or 2 described systems, it is characterized in that,
The RAID grade that described copy layer control module set according to the user, for the read data operation of application apparatus to corresponding logical volume, submit the instruction of read data on corresponding RAID subregion to described RAID layer control module, and the data that this RAID layer control module is returned return to application apparatus;
The copy redundancy strategy that described RAID layer control module set according to the user, submit the instruction of read data on corresponding disk for the instruction of described copy layer control module read data to described Physical layer control module to, and the data that this Physical layer control module reads are returned to described copy layer control module;
Described Physical layer control module is carried out the read data operation according to the instruction of described RAID layer control module read data to corresponding one or more physical hard disks, and the data that read are returned to this RAID layer control module.
5. a disk storage system as claimed in claim 1 carries out the method for data access, comprising:
Create the RAID of raid-array RAID layer for the physical disk of Physical layer by management interface, set simultaneously corresponding RAID grade, and division RAID subregion, for described RAID partition creating logical volume, and distribute to corresponding application apparatus, be that described application apparatus is set the copy redundancy strategy simultaneously;
The data access of corresponding logical volume is converted application apparatus to corresponding RAID subregion data access; And will convert to the data access of described RAID subregion data access to corresponding physical disk to.
6. in accordance with the method for claim 5, it is characterized in that,
Described copy redundancy strategy comprises single replication policy and/or many replication policies, wherein:
Single replication policy, the RAID number of partitions that described logical volume comprises is at least two, and any data all will be written in two RAID subregions when writing logical volume simultaneously;
Many replication policies, it is individual that the RAID number of partitions that described logical volume comprises is at least (n+1), and any data all will be written in (n+1) individual RAID subregion when writing logical volume simultaneously; Wherein said n 〉=2.
7. in accordance with the method for claim 6, it is characterized in that, the data access of corresponding logical volume converted application apparatus to corresponding RAID subregion data access, specifically comprise:
Set the RAID grade with the data writing operation of application apparatus to described copy layer respective logic volume according to the user, convert the data writing operation to the corresponding RAID subregion of described RAID layer to; Perhaps, with the read data operation of application apparatus to the corresponding logical volume of described copy layer, convert the read data operation to the corresponding RAID subregion of described RAID layer to.
8. in accordance with the method for claim 7, it is characterized in that, will convert to the data access of described RAID subregion the data access to corresponding physical disk to, specifically comprise:
Described copy redundancy strategy according to the user sets will convert to the data writing operation of the corresponding RAID subregion of described RAID layer the data writing operation to the corresponding one or more disks of described Physical layer to; The read data that perhaps, will convert to the corresponding one or more disks of described Physical layer the read data operation of the corresponding RAID subregion of described RAID layer operates.
9. in accordance with the method for claim 8, it is characterized in that, also comprise:
To return to application apparatus from the data that read of the corresponding one or more disks of described Physical layer.
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| CN102968422B (en) * | 2011-08-31 | 2015-06-17 | 中国航天科工集团第二研究院七0六所 | System and method for controlling streaming data storage |
| CN102945140A (en) * | 2012-09-26 | 2013-02-27 | 曙光信息产业(北京)有限公司 | Magnetic disc fusion method |
| US20160259573A1 (en) * | 2015-03-03 | 2016-09-08 | International Business Machines Corporation | Virtual tape storage using inter-partition logical volume copies |
| CN106959825B (en) * | 2017-03-21 | 2020-01-14 | 浙江宇视科技有限公司 | Data reading method and device based on RAID (redundant array of independent disk) disk array |
| CN107329856A (en) * | 2017-06-30 | 2017-11-07 | 郑州云海信息技术有限公司 | A kind of SDS dispositions methods and system based on RAID |
| CN110286849B (en) * | 2019-05-10 | 2023-07-21 | 深圳物缘科技有限公司 | Data processing method and device of data storage system |
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