CN102880430A - System and method for managing RAIDs (redundant array of inexpensive disks) - Google Patents
System and method for managing RAIDs (redundant array of inexpensive disks) Download PDFInfo
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Abstract
The invention discloses a system and a method for managing RAIDs (redundant array of inexpensive disks), which are characterized in that the topological connection of a storage control cabinet and storage expansion cabinets is carried out by using a total exchange type framework, so that the problem in performance bottleneck especially between a plurality of storage expansion cabinets and the storage control cabinet of a disk storage system is solved. According to the system and the method for managing the RAID, for each group of RAIDs in an RAID deployment mode, the number of member disks is controlled effectively, so that each member disk is guaranteed to have an independent high-speed disk channel which is connected to the storage control cabinet and an RAID check disk; in this way, the overall operational performance of the RFID groups is guaranteed.
Description
Technical field
The present invention relates to disk storage system administrative skill field, relate in particular to management system and the method for a kind of raid-array (RAID).
Background technology
Along with the expansion of calculation scale and the appearance of emerging application model (such as cloud computing, Internet of Things), large market demand grows with each passing day.Raid-array (RAID, Redundant Array of Inexpensive Disks) conduct independently large storage facilities has been widely used in the large data-storage system.The Memory Extension cabinet is the high performance-price ratio storage elementary cell of generally using, and generally is connected to the storage switch board by FC or SAS cable, carries out the RAID configuration management by the storage switch board.
In current Storage system construction, PB level storage system is very general, in high-performance calculation, Digital Media environment even single cover storage system more than the 10PB occurred.In this type of was used, number of disks will be used many cover Memory Extension cabinets up to thousands of on the one hand, can adopt on the other hand the polylith disk configuration RAID that crosses over a plurality of cabinets.In traditional FC-AL framework, JBOD is modal disk extended mode.Fig. 1 is based on the RAID management system schematic diagram of FC-AL framework in the prior art, as shown in Figure 1, between storage switch board and the extension cabinet, usually adopt the mode of similar daisy chain to carry out the topology tissue between extension cabinet and the extension cabinet, the characteristics of this expansion structure are the disk channels that all disks are shared a maximum 4Gb/s, and performance bottleneck is obvious, in case and this arbitrated loop go wrong, all disks all can be affected, and this mode is eliminated gradually; Self-defined mode is adopted in the selection of RAID member's dish, can be limited to a cabinet inside, also can cross over a plurality of cabinets.Carry out RAID when configuration when striding a plurality of extension cabinet, the daisy chain between the cabinet may become performance bottleneck.
Fig. 2 is based on the RAID management system schematic diagram of SAS disk channel technology in the prior art.The point-to-point disk channel technology of SAS is the disk channel technology that current industrial circle generally adopts, this mode is that performance or reliability all have huge lifting with respect to FC-AL: each disk-to-disk controller has the independently data link of 6Gb/s, it is a kind of disk topological structure of switch type, but this connection only limits to disk chassis inside, between disk chassis and disk chassis, adopt 2 each other redundant SAS disk channel connect, therefore in the situation that connect a plurality of disk chassis, the SAS channel bandwidth between the disk chassis and the outlet bandwidth of Magnetic Disk Controller will form performance bottleneck.
No matter be that FC-AL or SAS connect, its effective bandwidth maximum only is about 3GB, every disk is about 60MB/S at the storage system performance, therefore, only need 50 disks the effective bandwidth of whole passage can be taken, in the large data storage environment of magnanimity up to thousands of disks, the performance bottleneck of expansion link is fairly obvious.Cross over a plurality of Memory Extension cabinets and carry out the RAID performance in when configuration in order to promote many disks, now propose a kind of management system and method for raid-array.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of management system and method for raid-array, with the performance bottleneck problem of the many disk expansions of good solution link.
For achieving the above object, the present invention is achieved through the following technical solutions:
The management system of a kind of raid-array (RAID), described system comprise storage switch board and at least two Memory Extension cabinets, it is characterized in that, are connected by data channel independently between described storage switch board and each Memory Extension cabinet;
Wherein, described each Memory Extension cabinet is provided with the disk of predetermined quantity, described storage switch board is provided with the RAID controller, described RAID controller is used for selecting the disk of different Memory Extension cabinet predetermined quantities to be configured to the RAID group, and carries out data read-write operation based on the RAID group that described configuration is finished.
Described RAID group comprises by the RAID controller selects the RAID group that the monolithic disk is configured in the different Memory Extension cabinets, and wherein, the number of member's dish is 20 to the maximum among every group of RAID.
Described independently data channel comprises the point-to-point disk channel of SAS.
Described every group of RAID member dish manages by independent RAID controller or electric switch module (ESM) parts.
Described storage switch board is provided with main RAID controller and from the RAID controller, is connected by data channel independently between the mode that adopts principal and subordinate's control and each Memory Extension cabinet.
Described RAID group has the data check function.
The present invention also discloses the management method of a kind of raid-array (RAID), the method realizes data reading operation and write operation based on the management system of the raid-array that comprises storage switch board and at least two Memory Extension cabinets, be connected by data channel independently between described storage switch board and each Memory Extension cabinet, described each Memory Extension cabinet is provided with the disk of predetermined quantity, described storage switch board is provided with the RAID controller
The RAID controller selects the disk of predetermined quantity in the different Memory Extension cabinets to be configured to the RAID group;
The RAID controller writes data to be written in the pre-configured RAID group;
The RAID controller reads data to be read from pre-configured RAID group.
Described RAID group comprises by the RAID controller selects the RAID group that the monolithic disk is configured in the different Memory Extension cabinets, and wherein, the number of member's dish is 20 to the maximum among every group of RAID.
Described storage switch board is provided with main RAID controller and from the RAID controller, is connected by data channel independently between the mode that adopts principal and subordinate's control and each Memory Extension cabinet.
Described RAID group has the data check function.
Technical scheme of the present invention adopts the framework of full switch type to store switch board and is connected with the topology of Memory Extension cabinet, has solved the performance bottleneck problem between the especially a plurality of Memory Extension cabinets of disk storage system and storage switch board; The every group of RAID that the present invention is directed to the RAID deployment mode effectively controls the quantity of member's dish, and the hyperdisk passage is connected to storage switch board and RAID check disk to guarantee have independently by each member's dish, has ensured the integral operation performance of RAID group.
Description of drawings
Fig. 1 is based on the RAID management system schematic diagram of FC-AL framework in the prior art;
Fig. 2 is based on the RAID management system schematic diagram of SAS disk channel technology in the prior art;
Fig. 3 is the management system schematic diagram of the raid-array of the specific embodiment of the invention;
Fig. 4 is the RAID configuration management pattern diagram of the specific embodiment of the invention one;
Fig. 5 is the RAID configuration management pattern diagram of the specific embodiment of the invention two;
Fig. 6 is the RAID configuration management pattern diagram of the specific embodiment of the invention three;
Fig. 7 is the management method process flow diagram of the raid-array of the specific embodiment of the invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Fig. 3 is the management system schematic diagram of the raid-array of the specific embodiment of the invention.Described system comprises storage switch board and at least two Memory Extension cabinets, is connected by data channel independently between described storage switch board and each Memory Extension cabinet; Wherein, described each Memory Extension cabinet is provided with the disk of predetermined quantity, described storage switch board is provided with the RAID controller, described RAID controller is used for selecting the disk of different Memory Extension cabinet predetermined quantities to be configured to the RAID group, and carries out data read-write operation based on the RAID group that described configuration is finished.
Described storage switch board is provided with main RAID controller and from the RAID controller, is connected by data channel independently between the mode that adopts principal and subordinate's control and each Memory Extension cabinet.
As shown in Figure 3, have between storage switch board and each the Memory Extension cabinet 1 independently high-performance SAS disk channel to carry out high speed interconnected, the full switch type topology that has formed from the storage switch board to the Memory Extension cabinet connects, and has avoided the performance bottleneck problem that traditional bus connects in the prior art.
Fig. 4 is the RAID configuration management pattern diagram of the specific embodiment of the invention one.As shown in Figure 4, from the raid-array management system, select the Memory Extension cabinet of predetermined quantity, described Memory Extension cabinet can be selected or any Selection and Constitute according to the order of extension cabinet, in the present embodiment, Selective storage extension cabinet 1, Memory Extension cabinet 2, Memory Extension cabinet 3 ... Memory Extension cabinet N has two memory disks RAID configuration management pattern to be described as example take each Memory Extension cabinet.From Memory Extension cabinet 1, Memory Extension cabinet 2, Memory Extension cabinet 3 ... select respectively disk 1 to form 1 group of a RAID who crosses over a plurality of Memory Extension cabinets among the Memory Extension cabinet N; Described Memory Extension cabinet 1, Memory Extension cabinet 2, Memory Extension cabinet 3 ... other disks among the Memory Extension cabinet N the like, final, the monolithic disk of each Memory Extension cabinet belongs to respectively different RAID groups.Wherein, the selecting sequence of disk 1 and disk 2 is not restricted in each extension cabinet.Like this, in each RAID group, each member's dish is positioned at different Memory Extension cabinets, is connected to the storage switch board by SAS disk channel fully independently, and performance or reliability all have higher guarantee.
In the present embodiment, described RAID group comprises by the RAID controller selects the RAID group that the monolithic disk is configured in the different Memory Extension cabinets, and wherein, the number of member's dish is 20 to the maximum among every group of RAID.Described every group of RAID member dish manages by independent RAID controller or electric switch module (ESM), has effectively controlled the XOR expense of every group of RAID, has ensured the integral operation performance of RAID group.
Fig. 5 is the RAID configuration management pattern diagram of the specific embodiment of the invention two.As shown in Figure 5, from the raid-array management system, select the Memory Extension cabinet of predetermined quantity, described Memory Extension cabinet can be selected or any Selection and Constitute according to the order of extension cabinet, in the present embodiment, Selective storage extension cabinet 1, Memory Extension cabinet 2 ... Memory Extension cabinet 19, Memory Extension cabinet 20 ... Memory Extension cabinet N has two memory disks RAID configuration management pattern to be described as example take each Memory Extension cabinet.From Memory Extension cabinet 1, Memory Extension cabinet 2 ... select respectively disk 1 to form 1 group of a RAID who crosses over a plurality of Memory Extension cabinets in Memory Extension cabinet 19, the Memory Extension cabinet 20; Described Memory Extension cabinet 1, Memory Extension cabinet 2 ... disk 1 in the Memory Extension cabinet 19 among remaining disk 2 and the Memory Extension cabinet N forms a RAID2 group of crossing over a plurality of Memory Extension cabinets, in the Memory Extension cabinet 20 remaining disk 2 again with other Memory Extension cabinets in the monolithic disk form other RAID group, the like, finally, the monolithic disk of each Memory Extension cabinet belongs to respectively different RAID groups.Wherein, the selecting sequence of disk 1 and disk 2 is not restricted in each extension cabinet.Like this, in each RAID group, each member's dish is positioned at different Memory Extension cabinets, is connected to the storage switch board by SAS disk channel fully independently, and performance or reliability all have higher guarantee.
In the present embodiment, described RAID group comprises by the RAID controller selects the RAID group that the monolithic disk is configured in the different Memory Extension cabinets, and wherein, the number of member's dish is 20 to the maximum among every group of RAID.Described every group of RAID member dish manages by independent RAID controller or electric switch module (ESM), has effectively controlled the XOR expense of every group of RAID, has ensured the integral operation performance of RAID group.
Fig. 6 is the RAID configuration management pattern diagram of the specific embodiment of the invention three.As shown in Figure 6, from the raid-array management system, select the Memory Extension cabinet of predetermined quantity, described Memory Extension cabinet can be selected or select arbitrarily according to the order of extension cabinet, in the present embodiment, Selective storage extension cabinet 1, Memory Extension cabinet 2 ... Memory Extension cabinet N-1, Memory Extension cabinet N, the RAID controller selects the disk of predetermined quantity in the different Memory Extension cabinets to be configured to the RAID group, and the disk of described predetermined quantity can be according to the actual conditions setting.As shown in Figure 6, two memory disks are arranged is that example describes RAID configuration management pattern to each Memory Extension cabinet.The RAID controller is combined into virtual disk with the disk 1 in each Memory Extension cabinet and disk 2, from Memory Extension cabinet 1, Memory Extension cabinet 2 ... select respectively virtual disk 1, virtual disk 2 among Memory Extension cabinet N-1, the Memory Extension cabinet N ... 1 group of the RAID of a plurality of Memory Extension cabinets of leap of virtual disk N-1, virtual disk N composition; The like, final, the single virtual disk of each Memory Extension cabinet belongs to respectively different RAID groups.Like this, in each RAID group, each member's dish is positioned at different Memory Extension cabinets, is connected to the storage switch board by SAS disk channel fully independently, and performance or reliability all have higher guarantee.
In the present embodiment, described RAID group comprises by the RAID controller selects in the different Memory Extension cabinets RAID group that is configured to after two virtual processing of disk, and wherein, the number of member's dish is 20 to the maximum among every group of RAID.Described every group of RAID member dish manages by independent RAID controller or electric switch module (ESM), has effectively controlled the XOR expense of every group of RAID, has ensured the integral operation performance of RAID group.
RAID commonly used comprises 0 to RAID 6 seven kind of basic RAID rank from RAID, also has some basic other array configurations of RAID level, such as the combination of RAID 10(RAID 0 with RAID 1), the combination of RAID 50(RAID 0 and RAID 5) etc.Different RAID ranks are representing different memory properties, data security and carrying cost.For example, RAID 0 is called again Stripe or Striping, and it has represented the highest memory property in all RAID ranks.The principle that RAID 0 improves memory property is that continuous data are distributed to access on a plurality of disks, the execution that system has request of data just can be walked abreast by a plurality of disks, and each disk execution belongs to its part request of data.Parallel work-flow on this data can take full advantage of the bandwidth of bus, significantly improves the whole access performance of disk.RAID0 is irredundant configuration management pattern, all can't use when certain disk data that can cause all disks that break down, and has greatly increased the probability of data degradation.The redundant configuration management mode can improve the security (such as RAID1) of storage system, but this kind pattern disk utilization is low.In order to improve the security of RAID, in some RAID, increased the data check function, such as RAID3, RAID5, RAID6, when certain disk breaks down, as long as this disk is changed, then the RAID controller can be rebuild the data of damaging according to the data check function in new building.
Fig. 7 is the management method process flow diagram of the raid-array of the specific embodiment of the invention.As shown in Figure 7, the management method of described raid-array realizes data reading operation and write operation based on the management system of the raid-array that comprises storage switch board and at least two Memory Extension cabinets, be connected by data channel independently between described storage switch board and each Memory Extension cabinet, described storage switch board is provided with the RAID controller, described each Memory Extension cabinet is provided with the disk of predetermined quantity
The RAID controller selects the disk of predetermined quantity in the different Memory Extension cabinets to be configured to the RAID group;
The RAID controller writes data to be written in the pre-configured RAID group;
The RAID controller reads data to be read from pre-configured RAID group.
Described RAID group comprises by the RAID controller selects the RAID group that the monolithic disk is configured in the different Memory Extension cabinets, and wherein, the number of member's dish is 20 to the maximum among every group of RAID.
Described storage switch board is provided with main RAID controller and from the RAID controller, is connected by data channel independently between the mode that adopts principal and subordinate's control and each Memory Extension cabinet.
Described RAID group has the data check function.
Described independently data channel comprises the point-to-point disk channel of SAS.
In the test of the scale of 300 disks, the performance of storage system that carries out the RAID tissue based on technical solution of the present invention is to adopt 3.5 times of traditional approach system.
Technical scheme of the present invention adopts the framework of full switch type to store switch board and is connected with the topology of Memory Extension cabinet, has solved the performance bottleneck problem between the especially a plurality of Memory Extension cabinets of disk storage system and storage switch board; Effectively control the quantity of member's dish for the every group of RAID that adopts RAID deployment mode of the present invention, the hyperdisk passage is connected to storage switch board and RAID check disk to guarantee have independently by each member's dish, has ensured the integral operation performance of RAID group.
Above-mentioned only is preferred embodiment of the present invention and institute's application technology principle, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses, and the variation that can expect easily or replacement all should be encompassed in protection scope of the present invention.
Claims (10)
1. the management system of a raid-array (RAID), described system comprise storage switch board and at least two Memory Extension cabinets, it is characterized in that, are connected by data channel independently between described storage switch board and each Memory Extension cabinet;
Wherein, described each Memory Extension cabinet is provided with the disk of predetermined quantity, described storage switch board is provided with the RAID controller, described RAID controller is used for selecting the disk of different Memory Extension cabinet predetermined quantities to be configured to the RAID group, and carries out data read-write operation based on the RAID group that described configuration is finished.
2. the management system of raid-array according to claim 1 (RAID), it is characterized in that, described RAID group comprises by the RAID controller selects the RAID group that the monolithic disk is configured in the different Memory Extension cabinets, and wherein, the number of member's dish is 20 to the maximum among every group of RAID.
3. the management system of raid-array according to claim 1 (RAID) is characterized in that, described independently data channel comprises the point-to-point disk channel of SAS.
4. the management system of raid-array according to claim 1 (RAID) is characterized in that, described every group of RAID member dish manages by independent RAID controller or electric switch module (ESM).
5. the management system of raid-array according to claim 1 (RAID), it is characterized in that, described storage switch board is provided with main RAID controller and from the RAID controller, is connected by data channel independently between the mode that adopts principal and subordinate's control and each Memory Extension cabinet.
6. the management system of raid-array according to claim 1 (RAID) is characterized in that, described RAID group has the data check function.
7. the management method of a raid-array (RAID), the method realizes data reading operation and write operation based on the management system of the raid-array that comprises storage switch board and at least two Memory Extension cabinets, be connected by data channel independently between described storage switch board and each Memory Extension cabinet, described each Memory Extension cabinet is provided with the disk of predetermined quantity, described storage switch board is provided with the RAID controller, it is characterized in that
The RAID controller selects the disk of predetermined quantity in the different Memory Extension cabinets to be configured to the RAID group;
The RAID controller writes data to be written in the pre-configured RAID group;
The RAID controller reads data to be read from pre-configured RAID group.
8. the management method of raid-array according to claim 7 (RAID), it is characterized in that, described RAID group comprises by the RAID controller selects the RAID group that the monolithic disk is configured in the different Memory Extension cabinets, and wherein, the number of member's dish is 20 to the maximum among every group of RAID.
9. the management method of raid-array according to claim 7 (RAID), it is characterized in that, described storage switch board is provided with main RAID controller and from the RAID controller, is connected by data channel independently between the mode that adopts principal and subordinate's control and each Memory Extension cabinet.
10. the management method of raid-array according to claim 7 (RAID) is characterized in that, described RAID group has the data check function.
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