CN105700817A - Just Bunch of Discs JBOD apparatus - Google Patents
Just Bunch of Discs JBOD apparatus Download PDFInfo
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- CN105700817A CN105700817A CN201410705912.9A CN201410705912A CN105700817A CN 105700817 A CN105700817 A CN 105700817A CN 201410705912 A CN201410705912 A CN 201410705912A CN 105700817 A CN105700817 A CN 105700817A
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Abstract
An embodiment of the present invention discloses a Just a Bunch of Discs JBOD apparatus, which is used for providing a memory access based on a KV format by using a conventional hard disk in the condition of not affecting performance of an external memory controller. A CPU is contained in a cascading board of the JBOD apparatus disclosed by the embodiment of the present invention, and the CPU converts a hard disk block access format of a hard disk into a KV memory format and provides a KV access interface for the outside.
Description
Technical field
The present invention relates to field of storage, particularly relate to a kind of disk cluster JBOD device。
Background technology
JBOD is the storage device that in field of storage, a class is important。JBOD (JustaBunchOfDisks, disk cluster) is the storage device with multiple disc drivers installed on a base plate。Traditional JBOD on be rendered as single hard disk, upper layer software (applications) it be managed and use。Upper layer software (applications) is must flow through, it is impossible to directly access time it is conducted interviews by application software。
Fig. 1 show schematically composition and the application mode of tradition JBOD。Storage control passes through Serial Attached SCSI (SAS) interface (SerialAttachedSCSI, SAS) host bus adaptor (HostBusAdapter, HBA) storage medium on JBOD is directly managed, being presented to application program with the unit that is combined as of block BLOCK and BLOCK by medium, any access to medium all has to pass through storage control。In the JBOD device 100 shown in Fig. 1, comprise subtending board 101, it is provided that external interface (being generally SAS or Fibre Channel technologies interface (FibreChannel, FC)), may be coupled to storage control 105, or link the multi-stage cascade of more JBOD formation JBOD。Subtending board provides Media Interface Connector (being generally SAS or FC) to be used for connecting local storage medium 103 (HDD and the SSD such as SAS interface) simultaneously。Subtending board generally uses SAS extended chip 104, in order to have enough SAS or FC interface quantity to connect storage medium or cascade JBOD。SAS extended chip is only completed the extension of interface quantity, and data will not be done any process。
Rise along with big data, storage access mode (Key-value based on key value, KV) distributed memory system because its inquiry velocity is fast, capacity big, characteristic is widely used to support height concurrently etc., has also driven with the extensive application of the KV data form being type of organization。And currently mainly implementation is all run the protocol conversion of Block to KV on existing storage control。In Fig. 1, the upper protocol conversion running Block to KV of the central processing unit (CentralProcessingUnit, CPU) in storage control 105, conventional memory device is converted to the equipment supporting that KV accesses。
But, in actual applications, storage control needs run the process of substantial amounts of data, the metadata management even function of file system, processor in this storage control does protocol conversion, the processor resource of substantial amounts of storage control can be consumed, by the execution of appreciable impact other functions of system, reduce system effectiveness。
Summary of the invention
Embodiments provide a kind of disk cluster JBOD device, for when not affecting the performance of external storage controller, using conventional hard to provide the storage based on KV form to access。
Embodiment of the present invention first aspect provides a kind of disk cluster JBOD device, including:
Subtending board and hard disk；
Described subtending board is provided out the storage access mode KV access interface of key value, internally connects described hard disk；
Described subtending board includes central processor CPU；
Described CPU is used for, and the hard disk block access form of described hard disk will be converted to KV storage format。
In conjunction with the first aspect of the embodiment of the present invention, in the first implementation of embodiment of the present invention first aspect, described KV access interface includes at least one in Ethernet interface, Infiniband interface, SAS interface or PCIe interface。
In conjunction with the first implementation of embodiment of the present invention first aspect, in the second implementation of embodiment of the present invention first aspect, also including extended chip in described subtending board, described extended chip is for increasing the interface number of described subtending board。
In conjunction with the second implementation of embodiment of the present invention first aspect, in the third implementation of embodiment of the present invention first aspect, the number of described subtending board is multiple。
The third implementation in conjunction with embodiment of the present invention first aspect, in 4th kind of implementation of embodiment of the present invention first aspect, the interface type of described hard disk is Serial Attached SCSI (SAS) interface SAS, Serial Advanced Technology Attachment interface SATA or near line Serial Attached SCSI (SAS) interface NL-SAS。
In conjunction with the second implementation of embodiment of the present invention first aspect, in the 5th kind of implementation of embodiment of the present invention first aspect, the number of described subtending board is one。
In conjunction with the 5th kind of implementation of embodiment of the present invention first aspect, in the 6th kind of implementation of embodiment of the present invention first aspect, the interface type of described hard disk is SATA。
In conjunction with any one implementation in the 6th kind of implementation of the first aspect first aspect extremely of the embodiment of the present invention, in the 7th kind of implementation of embodiment of the present invention first aspect, described CPU is additionally operable to, and carries out KV read and write access operation。
In conjunction with the 7th kind of implementation of embodiment of the present invention first aspect, in the 8th kind of implementation of embodiment of the present invention first aspect, described CPU is additionally operable to, and drives described KV access interface and described hard disk。
As can be seen from the above technical solutions, the embodiment of the present invention has the advantage that in the subtending board of the JBOD device of the embodiment of the present invention and includes CPU, the hard disk block access form of hard disk will be converted to KV storage format by this CPU, KV access interface is externally provided, so, it is no longer necessary to storage control and storage device is carried out protocol conversion, JBOD device can directly provide KV to access, avoid Memory Controller and consume performance because of protocol conversion, affect the operation of other functions, improve the treatment effeciency of storage control, achieve when not affecting the performance of external storage controller, conventional hard is used to provide the storage based on KV form to access。
Accompanying drawing explanation
Fig. 1 is tradition one structural representation of JBOD device；
Fig. 2 is one structural representation of JBOD device in the embodiment of the present invention；
Fig. 3 is one high-level schematic functional block diagram of central processing unit of embodiment of the present invention JBOD device；
Fig. 4 is another structural representation of JBOD device in the embodiment of the present invention。
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments。Based on the embodiment in the present invention, the every other embodiment that those skilled in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention。
Referring to Fig. 2, in the embodiment of the present invention, a kind of 200 1 embodiments of disk cluster JBOD device include:
Subtending board 201 and hard disk 202；
Described subtending board 201 is provided out the storage access mode KV access interface of key value, internally connects described hard disk 202；
Described subtending board 201 includes central processor CPU 2011；
Described CPU2011 is used for, and the hard disk block access form of described hard disk 202 will be converted to KV storage format。
It is understood that this hard disk number can be one, it is also possible to for multiple, in actual applications, the hard disk installed in JBOD device is generally multiple。
The subtending board 201 of the JBOD device of the embodiment of the present invention includes CPU2011, the hard disk block access form of hard disk 202 will be converted to KV storage format by this CPU2011, KV access interface is externally provided, so, it is no longer necessary to storage control and storage device is carried out protocol conversion, JBOD device can directly provide KV to access, avoid Memory Controller and consume performance because of protocol conversion, affect the operation of other functions, improve the treatment effeciency of storage control, achieve when not affecting the performance of external storage controller, conventional hard is used to provide the storage based on KV form to access。
It is understandable that, owing to the hard disk block access form of hard disk 202 is converted to KV storage format by the CPU2011 in subtending board 201, therefore this subtending board 201 can use arbitrary interface to be provided out KV access, namely the kind of this KV access interface can have a variety of, such as can include Ethernet interface, Infiniband interface, SAS interface or PCIe interface etc., other a lot of interfaces can also be included, be not construed as limiting herein。And it is no longer the same with tradition JBOD device, it is limited to hard disk block access form, and the cable and storage control only by SAS interface is connected, solve due to the length limited of tradition SAS cable, JBOD device can be only placed on storage control limit, for data center, the problem lacking the motility of device layout。
Optionally, when this CPU2011 interface carried is insufficient for the requirement of JBOD device tep reel ability, extended chip 2012 can be increased on subtending board 201, this extended chip 2012 is for increasing the interface number of this subtending board 201, this extended chip 2012 is connected with CPU2011, it is possible to the interface number of extension CPU 2011。
It is understood that this CPU2011 not only carries out protocol conversion, but also described KV access interface and described hard disk can be driven, further, it is also possible to carry out KV read and write access operation。
Concrete, refer to Fig. 3, as an alternative embodiment of the invention, this CPU2011 specifically can include following functional module:
Memory interface drives module 301: be used for the SSD hard disk of common SAS, SATA, NL-SAS hard disk or PCIe, NVMe interface driving JBOD device to use, it is provided that correct bottom accesses operation。
Protocol conversion module 302: be used for the conversion between KV storage format and conventional hard block access form, it is possible to support standard or user-defined conversion regime。
KV storage operation module 303: mainly complete KV read-write operation and access, including the management etc. of KV index data。The data manipulation that KV storage is main is completed by this KV storage operation module 303。
Network interface drives module 304: for driving the various network interfaces of user side, it is possible to select different network interfaces according to cost, performance, networking mode etc., such as Ethernet, Infiniband, PCIe etc.。
The carrying out practically process of these JBOD device power-on and power-off can be:
First self-inspection and the initialization of JBOD device is completed, as initialized network, storage control etc. after system electrification。If JBOD device first powers on, then according to standard or self-defining mode, the block format of conventional hard is converted to KV form, generates KV access index。If be complete the conversion of KV form and KV index is normally preserved before, then recover original index, continue externally to provide read-write service。
When using the dual-port hard disks such as SAS, it is possible to use mode with double engines, it is provided that relatively reliable reset。At this time, it may be necessary to for providing synchronizing channel between two engines, it is ensured that the KV index of two engines keeps consistent。So, when arbitrary disabling controller is imitated, external service will not be interrupted。When the KV data of a certain engine preserve unsuccessfully cannot normally recover when, it is also possible to index recovery system service by KV in another controller, be greatly improved the reliability and availability of system。
When electricity under system (when including detecting abnormity of power supply), system is first shut off external network interface, no longer externally provides service。KV engine is cured to non-volatile memory medium (hard disk in Flash or device) by simultaneity factor, it is ensured that system can normally start next time。
The curing mode of KV index depends on the medium used, if KV index preserves, and the read-write operation of alignment is all in flash, then electrically operated relatively simple under, normal or abnormal power-on and power-off are all without causing loss of data。If operating in the internal memory of processor, then need to adopt suitable standby electricity mode, during convenient lower electricity, KV index is cured in non-volatile media。
It should be noted that the practical application request according to different application scenarios, for instance according to the number connecting hard disk, the selection of hard-disk interface type, considering of cost and reliability, in JBOD device, the number of this subtending board 201 can be multiple, it is also possible to is one。
In conjunction with Fig. 2, as another embodiment of JBOD device in the embodiment of the present invention, it is described above-mentioned JBOD device only exists a subtending board 201:
In the present embodiment, the interface type of this hard disk 202 is SATA, is SATA hard disc。
This subtending board 201 provides and has access to the KV form accessed conversion from SATA hard disc and externally provide read-write operation service。
In the present embodiment, owing to employing SATA disk, therefore subtending board 201 also has only to one, can save great amount of cost。
Refer to Fig. 4, as another embodiment of JBOD device in the embodiment of the present invention, in JBOD device, including two subtending boards, being described there is multiple subtending board:
In the present embodiment, JBOD device 400 includes subtending board 401 and subtending board 402；Subtending board 401 includes CPU4011, extended chip 4012；Subtending board 402 includes CPU4021, extended chip 4022, also includes hard disk 403。
The interface type of this hard disk 403 is Serial Attached SCSI (SAS) interface SAS, Serial Advanced Technology Attachment interface SATA or near line Serial Attached SCSI (SAS) interface NL-SAS, and this hard disk 403 is dual-port hard disk。
In the present embodiment, adopting multiple subtending board to connect dual-port hard disk, greatly improve the KV reliability accessed, the storage control of two subtending board connections can each other as backup。
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method, it is possible to realize by another way。Such as, device embodiment described above is merely schematic, such as, the division of described unit, being only a kind of logic function to divide, actual can have other dividing mode when realizing, for instance multiple unit or assembly can in conjunction with or be desirably integrated into another system, or some features can ignore, or do not perform。Another point, shown or discussed coupling each other or direct-coupling or communication connection can be through INDIRECT COUPLING or the communication connection of some interfaces, device or unit, it is possible to be electrical, machinery or other form。
It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to be that unit is individually physically present, it is also possible to two or more unit are integrated in a unit。Above-mentioned integrated unit both can adopt the form of hardware to realize, it would however also be possible to employ the form of SFU software functional unit realizes。
If described integrated unit is using the form realization of SFU software functional unit and as independent production marketing or use, it is possible to be stored in a computer read/write memory medium。Based on such understanding, part or all or part of of this technical scheme that prior art is contributed by technical scheme substantially in other words can embody with the form of software product, this computer software product is stored in a storage medium, including some instructions with so that a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention。And aforesaid storage medium includes: USB flash disk, portable hard drive, read only memory (ROM, Read-OnlyMemory), the various media that can store program code such as random access memory (RAM, RandomAccessMemory), magnetic disc or CD。
The above, above example only in order to technical scheme to be described, is not intended to limit；Although the present invention being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme。
Claims (9)
1. a disk cluster JBOD device, it is characterised in that including:
Subtending board and hard disk；
Described subtending board is provided out the storage access mode KV access interface of key value, internally connects described hard disk；
Described subtending board includes central processor CPU；
Described CPU is used for, and the hard disk block access form of described hard disk will be converted to KV storage format。
2. device according to claim 1, it is characterised in that described KV access interface includes at least one in Ethernet interface, Infiniband interface, SAS interface or PCIe interface。
3. device according to claim 2, it is characterised in that also include extended chip in described subtending board, described extended chip is for increasing the interface number of described subtending board。
4. device according to claim 3, it is characterised in that the number of described subtending board is multiple。
5. device according to claim 4, it is characterised in that the interface type of described hard disk is Serial Attached SCSI (SAS) interface SAS, Serial Advanced Technology Attachment interface SATA or near line Serial Attached SCSI (SAS) interface NL-SAS。
6. device according to claim 3, it is characterised in that the number of described subtending board is。
7. device according to claim 6, it is characterised in that the interface type of described hard disk is SATA。
8. the device according to claim 1 to 7, it is characterised in that described CPU is additionally operable to, carries out KV read and write access operation。
9. device according to claim 8, it is characterised in that described CPU is additionally operable to, drives described KV access interface and described hard disk。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410705912.9A CN105700817A (en) | 2014-11-27 | 2014-11-27 | Just Bunch of Discs JBOD apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410705912.9A CN105700817A (en) | 2014-11-27 | 2014-11-27 | Just Bunch of Discs JBOD apparatus |
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| CN105700817A true CN105700817A (en) | 2016-06-22 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106776387A (en) * | 2016-11-24 | 2017-05-31 | 大唐高鸿信安（浙江）信息科技有限公司 | Hard disk access expanding unit |
| CN106775482A (en) * | 2016-12-23 | 2017-05-31 | 郑州云海信息技术有限公司 | A kind of JBOD storage systems |
| CN107632923A (en) * | 2016-09-30 | 2018-01-26 | 华为技术有限公司 | A kind of tandem type hard disk and its alarm method |
| CN109408442A (en) * | 2018-12-28 | 2019-03-01 | 郑州云海信息技术有限公司 | A kind of multi-chip expanding unit and extended method |
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| CN109408442B (en) * | 2018-12-28 | 2024-04-09 | 郑州云海信息技术有限公司 | Multi-chip expansion device and expansion method |
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