WO2014179957A1 - Storage device, storage system, and data transmission method - Google Patents

Storage device, storage system, and data transmission method Download PDF

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Publication number
WO2014179957A1
WO2014179957A1 PCT/CN2013/075370 CN2013075370W WO2014179957A1 WO 2014179957 A1 WO2014179957 A1 WO 2014179957A1 CN 2013075370 W CN2013075370 W CN 2013075370W WO 2014179957 A1 WO2014179957 A1 WO 2014179957A1
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WO
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Prior art keywords
controller
data
storage device
card
storage
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PCT/CN2013/075370
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French (fr)
Chinese (zh)
Inventor
杜宇旻
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华为技术有限公司
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network-specific arrangements or communication protocols supporting networked applications
    • H04L67/10Network-specific arrangements or communication protocols supporting networked applications in which an application is distributed across nodes in the network
    • H04L67/1097Network-specific arrangements or communication protocols supporting networked applications in which an application is distributed across nodes in the network for distributed storage of data in a network, e.g. network file system [NFS], transport mechanisms for storage area networks [SAN] or network attached storage [NAS]
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06Digital input from or digital output to record carriers, e.g. RAID, emulated record carriers, networked record carriers
    • G06F3/0601Dedicated interfaces to storage systems
    • G06F3/0602Dedicated interfaces to storage systems specifically adapted to achieve a particular effect
    • G06F3/061Improving I/O performance
    • G06F3/0613Improving I/O performance in relation to throughput
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06Digital input from or digital output to record carriers, e.g. RAID, emulated record carriers, networked record carriers
    • G06F3/0601Dedicated interfaces to storage systems
    • G06F3/0628Dedicated interfaces to storage systems making use of a particular technique
    • G06F3/0655Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
    • G06F3/0659Command handling arrangements, e.g. command buffers, queues, command scheduling
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06Digital input from or digital output to record carriers, e.g. RAID, emulated record carriers, networked record carriers
    • G06F3/0601Dedicated interfaces to storage systems
    • G06F3/0668Dedicated interfaces to storage systems adopting a particular infrastructure
    • G06F3/0671In-line storage system
    • G06F3/0683Plurality of storage devices
    • G06F3/0689Disk arrays, e.g. RAID, JBOD

Abstract

The present invention provides a storage device, a storage system, and a data transmission method. The storage device comprises a first controller, a second controller, a first exchanging card, a second exchanging card, and a storage medium. The second controller and the first controller protect each other. The first exchanging card is connected to the first controller. The second exchanging card is connected to the second controller. The storage medium is connected to the first controller and the second controller. The first controller is used for, after receiving first to-be-stored data, calculating target storage device information of the first to-be-stored data, and is used for, when the target storage device is not a storage device, sending the first to-be-stored data and the target storage device information of the first to-be-stored data by using the first exchanging card. The storage system may comprise multiple storage devices, and the multiple storage devices form a ring network.

Description

Storage device, storage system and data transmission method

BACKGROUND embodiment of the present invention relates to communication technology, particularly to a storage device, storage system and data transmission method. Background technique

With the lifting of the growing demand for data storage and performance requirements of the memory array, according to the actual needs of the customer performance and capacity requirements scale storage system, the storage system scale technologies have emerged, by the storage system forming a large lateral interconnected storage array.

Scale refers to the storage system can be extended service access capability of the storage system, access control and hard capacity. FIG 1A shows a schematic structure of a conventional lateral extension of the central storage system, in FIG 1A, each node 11 are a storage device, each storage device is independent of the physical entity, in a separate subrack in. 1B, the memory device 11 includes two controllers, namely, controller A, controller B, 112, and a plurality of interface cards.

Wherein the two controllers in the storage apparatus shown in FIG. 1B composed controller, data mirroring is formed between the two memory controllers controller pair to constitute a minimum unit reliability, guarantee of a controller when the controller failure without loss of data.

In Figure 1A, among the respective storage devices centralized data exchange 12 through separate switches (Switch A in FIG. 1A, or switch B). In order to meet the exchange of data between a plurality of storage devices, the power switch 12 performance requirements, appropriate, high power switches 12 and bulky. Due to the limited interface of the switch, the performance is limited, and therefore when a large number of storage devices, the existing storage system can not meet the exchange requirements. Typically, each of the two storage devices 11 are connected to a switch controller 12, therefore, even if the switch 12 has a failure, there is still further provides a data path between the switch controller of each storage device. Each of high speed physical storage device 11 is connected between the switch and the peripheral device 12 is generally cross ears close contact (Pedpherd Component Interconnect-Express, Seoul Jane Wo PCIE) Infiniband, etc., or a parallel bus. However, the data between the storage devices need to go through the switch (the SWITCH, referred to as SW) 12, each storage device needs to occupy two operational interface of the switch, the switch and the limited service interface, so the data can only provide a limited number of storage devices exchange service, directly restricts the size of the storage system scale (scale-out) of.

Further, since the memory device 11, and switches are connected through a parallel bus (e.g., PCIE, etc.) between the 12, and the parallel bus is not suitable for long-distance transmission, the transmission distance of the common parallel bus is no more than 6m. If you want to apply the remote transmission of the bus, the cost is very high resolve. If all the storage devices in the storage system arrangement must be within a certain distance range centered switch, which greatly restricts the physical layout. SUMMARY

In view of this, embodiments of the present invention provides a storage device, storage system and data transmission method, the physical layout of the storage system to solve the limitations of the prior art, the scale of the problem of limited number of storage devices.

A first aspect, embodiments of the present invention provides a memory device, comprising:

A first controller for receiving a first data to be stored;

A second controller connected to the first controller, the first controller and the second controller mutual protection;

A first switching card connected to the first controller having a switch card interface; a second switching card is connected to the second controller has an interface for connecting the switch card; storage medium, and the a first controller, the second controller is connected, for storing data; wherein, the first controller proceeds to a ho, after receiving the first data to be stored, to calculate the first data to be stored when the target information storage device, when the target is a storage device when the storage device, said first data to be stored in said storage medium, when the destination device is not the storage device, via the first switching card the first target storage device information of the first data to be stored and transmitted data to be stored.

With the first aspect, in a first possible implementation, the first switch having an interface card for connecting two switching cards;

The second switch having an interface card for connecting two switching cards.

With the first aspect and the foregoing possible implementation mode, in a second possible implementation, the storage device a first switch card further configured to:

On receiving information of the second target storage device for storing data to be sent to a storage device and a second data to be stored;

Determining whether the storage device is a target storage device information of the second data to be stored; forwarding if the determination result is NO, put the second data to be stored, and a second target storage device information data to be stored to a next storage device .

With the first aspect and the foregoing possible implementation manner, in a third possible implementation, the first controller is further configured to receive a third data to be stored, computing a third target storage device information data to be stored, and by being connected between the first controller and the second controller, said third data to be stored, the data to be stored in the third target storage device information is sent to the second controller;

A second controller for issuing said third data to be stored by the second switch card, the third target storage device information of the data to be stored.

With the first aspect and the foregoing possible implementation manner, in a fourth possible implementation manner, the connection between the first controller and the second controller is a bus connection, the first and the second switch card a controller connected between a bus connection, connected between the second switch card and the second controller is a bus connection.

With the first aspect and a fourth possible implementation manner, in a fifth possible implementation manner, the PCIE bus is a bus.

A second aspect, embodiments of the present invention provides a memory system, comprising:

A plurality of storage devices according to any of the preceding ring network, the ring network specific manner is: any two adjacent storage devices interconnected to the first switch card, any card of the second switching devices each two adjacent memory connection.

Binding a second aspect, in a first possible implementation, the number of the storage device is four, eight or twelve.

And said second aspect in conjunction with possible implementation mode, in a second possible implementation, the storage device of any adjacent two of the first switching card is connected through the mesh passages or FC cable, any of the two adjacent storage device connected to a second switching card through a mesh or cable channel FC. A third aspect, an embodiment provides a data transmission method of the present invention is applied to a storage system, the storage system comprises a plurality of storage devices, each storage device includes a storage medium, two controllers and two switch cards, wherein the storage medium is connected to the two controllers, one connected to each of said switching controller card, each card exchange and storage device of a switching device adjacent memory card connector, the method comprising:

A first storage device in the first controller receives the first data to be stored, the first storage device when the storage system is a storage device, the first storage device includes a first storage medium, the first controller , the second controller, the first switch card, a second switch card;

A first controller calculates the first storage device for storing data is known to be the first target storage device is the storage system of N storage devices, N being a natural number;

The first storage device for storing data to be sent to the first exchange a memory card adjacent equipment;

If the received first data to be stored is not the N-th switch card storage card exchange, forwarding the first data to be stored next adjacent card to exchange storage device until said N-th memory switch card device receiving the first data to be stored;

The N-th switch card storage device for storing data to be sent to said first controller connected to said N-th memory device controller receives the first data to be stored to the first data to be stored into the storage medium of the N-th storage apparatus.

Combination with the third aspect, in a first possible implementation manner, the first storage device for storing data to be sent to the first exchange a memory card adjacent equipment, comprises:

Said first controller storing first data to be sent to a first switching controller connected to the first card;

A first switching card sends the first data to be stored to give a first switching card connected to the card exchange. Combination with the third aspect, in a second possible implementation manner, the first storage device for storing data to be sent to the first exchange a memory card adjacent equipment, comprises:

The first controller transmits the first data to be stored is connected to the second controller; a second storage controller to be the first data to the second card is connected to the second switching controller ;

Said second switching card sends a first data to be stored more second switching card connected to the card exchange. Seen from the above technical solutions, the storage apparatus of the embodiment of the present invention, a storage system and a data transmission method, wherein the storage device may include a first controller, a second controller connected to the first card, and a first switching controller, connections a second switch card a second controller, and a first controller, a second controller connected to the storage medium to achieve a first storage device controller after receiving the first data to be stored, a first calculation to be stored target information data storage apparatus, the target is a storage device when the storage device, the first data to be stored in the storage medium, the storage system further comprises a plurality of storage devices in the storage system to solve the physical layout of the prior art limits the lateral expansion problem of limited number of storage devices. BRIEF DESCRIPTION OF DRAWINGS In order to more clearly illustrate the technical solutions of the present invention, the accompanying drawings for describing the embodiments are introduced briefly in the embodiment as required Apparently: The following drawings are only some embodiments of the present invention, the figures for ordinary skill in the art, without any creative effort, and other drawings can be obtained to achieve the same aspect of the present invention based on these drawings.

FIG 1A is a schematic structural diagram of the storage system of the prior art;

FIG 1B is a schematic view of the prior art storage system in a storage device;

FIG 2 is a schematic configuration of the switch card according to an embodiment of the present invention;

FIG 3 is a schematic structure of a storage device according to an embodiment of the present invention;

FIG 4 is a schematic structure of a storage system according to an embodiment of the present invention;

FIG 5 is a schematic view of a component failure in the prior art storage systems;

FIG 6 is a schematic flow chart of data transmission method according to an embodiment of the present invention. detailed description

To make the objectives, technical solutions, and advantages of the present invention will become apparent in conjunction with the following drawings of the present invention embodiments, the technical solutions of the present invention are clearly and completely described. Clearly, the various embodiments described below are only a part of the present embodiment of the invention. Based on each of the following embodiments of the invention, those skilled in the art can even all technical features, can be obtained by other embodiments of the present invention solve the technical problem, the technical effect achieved by the present invention an equivalent conversion section, which transform to various embodiments without departing from the apparent scope of the disclosed invention.

SUMMARY Example embodiments of the present invention, the following brief description scale storage system and the longitudinal extension of the meaning of ease of understanding.

Added only in a storage device a hard disk of the storage system, thereby increasing the storage capacity of the storage system, those skilled in the art will be referred to the longitudinal extension of the storage system; add storage controller in the storage device of the storage system, since the storage controller may controlling the hard disk, hard disk access services, and access, so the storage controller corresponds to add the extended control storage device, a hard disk access and service access capability, one skilled in the art is referred to as a storage system laterally extension.

In the prior art, FIG. 1A, not shown, connected to a controller ll la, 111b uses the parallel bus between a hard disk, a hard disk controller (e.g., serial attached small computer system interface (Serial Attached SCSI, referred to as SAS) bus), However, these conventional parallel bus transmission distance of not more than 6m, in order to meet the requirements of the transmission distance, when the large storage device controller, a hard disk layout of the entire storage system is very unreasonable. That is, all storage devices of the storage system of the prior art must be approached in order to switch the center of a certain distance, a great physical layout constraints, can not achieve the true sense of the layout of distributed, in particular also under control then hard, the SAS bus between the controller and the hard disk which is parallel bus, and further when there are many controllers, hard disk layout of the entire storage system would be very unreasonable.

In particular, FIG. 1A switches A and B run in dual hot standby mode, when a switch fails, the performance of the storage system is reduced by half. That is, the memory system shown in FIG. 1A switches A and B simultaneously, the storage system receives data to be stored, via the switches A and B is determined in a storage device 11 stored in the switch when the fault A occurred , the data to be stored is determined only by the switch B is stored in the storage device 11, thereby reducing the performance of the storage system.

Example embodiments provide an integrated memory controller to exchange cards, the card exchange to the present embodiment comprising the present invention, FIG. 2: a calculation unit 01, the exchange media 02, memory 03, and three interfaces 04

Wherein the calculation unit 01 is connected to the memory bus 03, the calculation unit 01 and exchange media 02 of the bus connection, the exchange media 02 and the three bus interfaces 04, respectively; the three interfaces a first interface 04 connected via a bus system, memory controller of the first storage device (FIG. 4), the second interface is connected via fiber optic cable or the storage system and the first storage device adjacent to a switch card memory device, the third storage device via the interface of another fiber optic cable connection or adjacent to the storage system to the first storage device to exchange cards.

For example, the calculation may be a central processing unit (Central Processing Unit, referred to as CPU).

Alternatively, the same structure of the interface of the three, and three interfaces are the non-transparent bridge

(Non-transparent bridge, Jane Wo Seoul NT) interface.

Understood that, NT PCI bus interface or a PCIE bus port.

In an embodiment implemented in three interface shown in the switch card interface for connection may be non-NT interface for connecting the controller interface the interface may NT FIG. In a specific application, another switching interface card connected to the interface may be a non-NT NT interface. That is, two switch cards through respective interface, the interface can two switching cards for a card exchange interface can NT.

Typically, the above three interfaces provide for isolation of the address data, translation, bridging functions.

Seen from the above embodiments, the present embodiment of the card exchange is provided in the storage device, for transmitting data between storage devices connected to the implement.

Examples of the storage device according to the present embodiment may be interconnected by a built-in storage systems composed of switch card; the prior art, in addition to the storage device, but also high-performance storage system switches to the composition. Thus Built switch card books Example embodiments of the storage device storage systems have the advantage of low cost, low power consumption, small volume.

On the other hand, embodiments of the present invention provides a memory device, shown in Figure 3, the storage device 22 of the present embodiment, comprising: a first controller 221a, the second controller 221b, a first switch card 222a, the second switch card 222b and a storage medium (not shown).

Wherein the first controller 221a is configured to receive a first data to be stored, the second controller 221b connected to the first controller 221a, and the second controller the first controller 221a and 221b each protection. Mutual protection means that when a controller does not work, the business to another controller to perform. For example: When the first controller 221a fails, the stored data can be forwarded to the second controller 221b, 221b by the second controller forwards the traffic to another storage device, or by the second controller 221b to be stored data to the storage medium. In addition to the first controller 221a itself fails, but if the connection 222a between the first controller and the first switch card 221a fails, or the failure of a first switching card, can also be received by the first controller 221a storing data transferred from the second process controller 221b.

A first switch card 222a 221a connected to the first controller has an interface for connection to a switch card, the first card exchange may be connected through this interface with other storage devices to exchange cards.

A second switch card 222b connected to the second controller 221b, an interface for connecting with a switch card, the second card may be connected by switching the switch card interface other storage devices.

Storage medium, and the first controller 221a, 221b connected to the second controller, for storing data.

The first controller 221a into a ho for, after receiving the first data to be stored, the storage device calculates the target information of the first data to be stored, when the target storage device when the storage device, the storing said first data to be stored in the storage medium, when the storage device is not the target memory device through the first switch card 222a to the first data to be stored and the first data to be stored target storage device information sent. Embodiment, the storage device is a storage device storing the target data to be stored according to the present embodiment. Destination storage device information is information for identifying the target storage device, such as a storage device ID address of the target or target storage device. Policy information in the first target storage device controller 221a calculates a first plurality of data may be stored, for example, load balancing strategy, the free storage space of a larger memory device as a target device; or data content according to data to be stored, is determined a target device; or according to the size of free storage space between a storage device and network bandwidth size, jointly determine the target storage device.

The storage device may ring network. A first switch card 222a to the first data to be stored and the data to be stored in the first target storage device information sent after the adjacent two memory device receiving this data. Specifically, the memory device adjacent the card exchange target storage device receives a first information data to be stored and the first data to be stored, and adjacent target memory device according to a first switching device card data to be stored this information determining apparatus is not the target memory device, if so, storing the first data to be stored, and if not, continue to forward the first target storage device and the first data to be stored in the data information to be stored at a storage device .

For example, the first controller 221a is further configured to, after receiving the third data to be stored, computing a third target storage device information data to be stored, and by the first controller 221a and a second control 221b is connected between, said third data to be stored, the data to be stored in the third target storage device information is sent to the second controller. A second controller 221b for emitting the third data to be stored through the second switch card 222b, the third target storage device information of the data to be stored.

Specifically, the first switch card 222a and 222b may be a second switch card 2 card exchange described example, which has an interface device for connection to adjacent storage devices to exchange cards.

That is, the first switch card 222a has an interface and an interface for a connection controller for connecting two switching cards, the second switch card 222b has two connections for exchanging a card interface for connecting the control and Interface's.

Further, in the storage devices of the storage system, the storage device 222a of the first card is further configured to exchange a second receiving data to be stored on a storage device and sent to the target storage apparatus number information of the second data to be stored; if Analyzing the result is No, put the information of the second target storage device, and the second data to be stored be stored data to be forwarded to the next storage device. Referring to Figure 4, the storage device by way of the ring system is composed implemented: a first storage device and the second switch card memory device connected to a switching card, a second storage device and a second switch card memory a further switching device connected to the card; in addition, a first storage device and a card exchange switch cards third storage apparatus connected to the other card connected to a storage device switching the second switch card and the second storage device. For convenience of description, the present embodiment is called the second storage device on a storage device, a third storage device called a lower storage device. Here the concept of a next one is only relative, it is interchangeable.

In a particular application, the interior of the storage device 22 is provided with a plurality of slots, inserted into the access slot switch card 222a, 222b outside, access may also include an interface card 223, shown in Figure 3, the first the controller 221a connected to the plurality of interface cards 223, the second controller 221b connected to the plurality of interface cards 223, 223 and the switch card interface card 222a, 222b in parallel.

In a particular application, the connection 221a between the first controller and the second controller 221b connected to the bus, bus connecting the first switching connections between cards 222a and 221a of the first controller, the connection between the second switch card 222b and the second controller 221b connected to the bus. For example, the bus may be a PCI bus or for the PCIE bus.

The present embodiment the storage device may be located in storage system, the storage system of each storage device are sequentially connected to form a ring network, connection is:

Any two adjacent storage devices interconnected to the first switch card, any two adjacent storage devices connected to each other a second switching card, particularly by connecting such a coaxial cable, Ethernet cable, optical fiber.

In a specific application, the first switch card 222a via an interface controller connected to a first memory device 221a, a first storage device and a first switching exchange cards next card storage device.

A second switch card 222b via an interface controller connected to a second storage device 221b, a memory card on the second switching device and a second switching device of the next memory card.

Seen from the above embodiments, the storage device of this embodiment can transmit data directly adjacent to the storage device, the storage device as in the first controller after receiving the first data to be stored, computing a first data to be stored target information storage device, the target is a storage device when the storage device, the first data to be stored in the storage medium, the storage system further comprises a plurality of storage devices, it can be long-distance transmission via cable, optical fiber between the device line storage system to solve the physical layout limitations of the prior art, the scale problem of a limited number of storage devices.

In another aspect, embodiments of the present invention provides a storage system, shown in Figure 4, the storage system 20 of the present embodiment comprises: a plurality of storage devices of the embodiments described above in Example 22, ring network, the ring network composed DETAILED DESCRIPTION They are: any two adjacent storage devices interconnected to the first switch card, any two adjacent storage devices connected to each other a second switch card.

In a particular application, any two adjacent first switch card memory device through the mesh passages (Fiber Channel, FC) or cable 21 is connected, any two adjacent said memory card through the second switching device FC 21 or a cable connection.

That is, where the first card and the second switching switch card are shown in FIG. 2 switch card, the card comprises three switching interfaces, wherein a first interface of the three ports are connected by a bus switch card corresponding storage device controller, three interfaces second interface via another storage device or optical cable connected to the right side of FC storage devices adjacent switch card; three third interface interfaces another storage device connected to the storage device via the left FC cable or an adjacent switch card.

The switch card address for enabling isolation between two storage devices, data translation, or data bridging functions.

Translation means described above: a controller to another controller when access to the space, a uniform address code to access the controller of the present embodiment. For example, each controller in the storage device is a complete computing device, comprising CPU, memory, and other computing components necessary; the computing means having independent addressing space, such as from 0 to 0XFFFF; first storage device CPU controller, it can access only their own space under the control of space can only be completely on your own system coding segments. If the first storage device controller wants a certain space of the second controller accesses the storage device, then you must use PCIE NT Port (Interface) way to convert this space of the second controller is the first controller the address of a certain period, where the conversion is called address translation.

Of course, also be described as the storage system, any two adjacent memory device 22 is connected to ring network. It will be appreciated that the storage system and is located in a first storage device and a storage device adjacent to the last of the storage device.

For example, the number of storage systems in the storage device is four, five, six, eight, ten, twelve, eighteen and so on. The present embodiment is only illustrative and do not limit the number of storage devices in the storage system.

Of course, in practical applications, either controller of each storage device is also connected to the storage system a plurality of storage media, the present embodiment is merely illustrative embodiment, it is not in FIG. 4 illustrates a plurality of storage media.

Seen from the above embodiment, the storage system of this embodiment, by providing the FC, the cable connecting the adjacent memory device, a storage device may be any of a controller connected to the exchange by a respective adjacent memory card and other devices interactive exchange of card data, thereby solving the physical layout of a storage system limitations of the prior art, the number of scale problem of limited storage devices.

It will be appreciated that the storage system shown in FIG. 4 as a distributed storage system may be bicyclic ring networking path, e.g., a first controller connected to the plurality of storage devices consisting of a first cyclic ring, a plurality of storage devices second controller connected to form a second ring ring, thus forming a true scale type storage system, breaking the nodes to limit the storage system of the prior art, solves the prior art problems between the irrational hard disk, and thus can provide more reliable protection of data stored.

Hereinafter, the star network shown in FIG bicyclic ring network path in the storage system 4 shown in FIG. 1A prior art storage system is described in comparison.

A switch under fault case, comparing the storage system the storage system of FIG. 1A and FIG. 4 of the impact and reliability, as shown in Figure 5: a star network of the prior art storage system has two switches, wherein the switches A damage, significant overall impact on the storage system, the overall performance decreased by 1/2. And ring network storage system includes a storage device using a plurality of cascaded switching mode of the card, if a bad card exchange (as shown in Figure 3 a first switch card 222a or 222b of the second switching card, etc.), storage Effects of the system is small, the degree of influence of only l / n, n is the number of the storage system to exchange cards.

Further, in practical applications, the prior art storage system, belong to two between the controller accesses the storage device via the interface chip needs a switch (switch A or switch B) - Level 3 interface chip delay mode; the minimum delay for the interface chip PCIE Switch chip, because they do not involve delays caused by protocol conversion.

Bicyclic ring network path in the storage system in the present embodiment, between two adjacent storage devices, the delay through the first switching device to the first card of the first memory card to exchange a second storage device, only two delay, delay than the star network storage system of the prior art is low; therefore, the passage bicyclic ring network storage systems in most scenarios, delay performance over the prior art star network storage systems.

According to yet another aspect of an embodiment of the present invention, embodiments of the present invention further provides a data transmission method, the data transmission method applied to the storage system and the storage device. Storage system including a plurality of storage devices, each storage device includes a storage medium, two controllers and two switch cards, wherein the storage medium is connected to the two controllers, each said controller being connected to a said switching cards, each switch card and a switching device adjacent memory card connector; wherein said method comprises the following step ho.

601, the first storage device to the first controller receives the first data to be stored, the first - storage device is a storage device of the storage system, the first storage device includes a first storage medium, first a controller, the second controller, the first switch card, the second card exchange.

602, the first storage device controller calculates a first target storage device of the first known data to be stored in the storage system for the N-th memory device, N is a natural number.

For example, the first controller of the first storage device according to a preset rule or data to be stored, the data is a known data in the storage system controller of the N first storage device stored in need, or You specify the data to be stored in the storage device as a storage target device, i.e., the first controller may calculate a first known data to be stored according to a preset rule and a first data to be stored as a target storage device of the storage system stores the N equipment.

Alternatively, the first controller of the first storage device is known to be the first target storage device for storing data in the storage system of N storage devices according to a preset rule. In other embodiments, the first controller of the first storage device may be determined according to the size of the target storage apparatus performance or available storage space of each storage device (i.e., the N-th first storage device controller), may be directly data to be stored target storage device, but also by the data to be stored and the importance of co-decision performance storage devices exist where a storage device.

603, the first storage device for storing data to be sent to the first exchange a memory card adjacent equipment; receive the replacement card if said first data to be stored is not the N-th storage apparatus to exchange cards, forwarding the first data to be stored next adjacent switch card storage device until said N-th memory device receives the first switch card data to be stored.

604, the N-th storage devices exchange the first card to be sent to a first data storage controller connected to said N-th memory device controller receives the first data to be stored in the said first storage storage medium to be stored in the N-th data storage device.

In an alternative embodiment, the aforementioned step 603 ho "a first storage device for storing data to be sent to the first storage device adjacent a card exchange" may specifically include the following figures are not ho sub-step shown.

6031, the first controller storing said first data to be sent to a first switching card connected to the first controller.

6032, the first switching card sends a first data to be stored to give a first switching card connected to the card exchange.

In another alternative embodiment, the above-described step 603 ho "a first storage device for storing data to be sent to the first storage device adjacent a card exchange" may specifically include the following FIG. ho sub-step, not shown.

6031 ', the first controller transmits the first data to be stored is connected to the second controller. 6032 ', the second controller to the first exchange to be stored data to the second card is connected to the second controller.

6033 ', the second switch card transmits the first data to be stored more second switching card connected to the card exchange.

Further, alternatively, the first storage device when the first controller receives second data to be stored, this time, the first storage device if the first controller fails, or, with the first a first controller connected to the data transmission switch card fault occurs, the method further comprises, not shown in FIG ho ho step 606 to step 608. It should be understood, the first storage device controller of the first occurrence of the data transmission failure, in particular: a first controller can not send data to other storage devices through a first switch card. In other embodiments, the first switch cards is also connected to the first data transmission controller may malfunction, or failure of data transmission between the first controller and the first switch card, or other card and the first exchange data transmission between the first switch card failure.

606, the first storage device after the first controller receives the second data to be stored, the first storage device controller calculates the first target storage device is known to be the second data is stored in the storage system N-th memory device.

607, a first controller of the first storage device to be stored in the second data to the second controller of the first storage device, the first storage device to exchange a second controller connected thereto card, to be stored in said second data storage device issued to a neighboring switch card; if the received second data to be stored is not the N-th switch card storage card exchange, forwarding the second data to be stored, until the N-th switching memory card device receives said second exchanged card data to be stored.

608, the N-th switch card storage device storing said second data to the controller to be connected, the controller receives the second data to be stored as the said N-th memory device said second data to be stored into the storage medium of the N-th storage apparatus.

The data transmission method enables a storage system for storing data. In addition, the storage system controller of a storage device for computing a target storage device to be stored in the data exchange connection card controller for determining whether the current target device is a storage device.

Each of the foregoing methods to complete all or part of a hardware embodiment of the ho step may be associated by program instructions embodiment. The program may be stored in a computer readable storage medium. When the program is executed, executed ho step comprises the above-described method of the embodiment; and the storage medium comprising: a variety of medium ROM, RAM, magnetic disk, or an optical disc capable of storing program code.

Finally, it should be noted that: the above embodiments only describe the technical solutions in embodiments of the present invention, rather than limiting;. Although the embodiments of the present invention has been described in detail, it can still various embodiments described embodiments of the technical solution to modify, or to some or all of the technical features equivalents; as such modifications or replacements do not cause the essence of corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

Claims
1. A storage device comprising:
A first controller for receiving a first data to be stored;
A second controller connected to the first controller, the first controller and the second controller mutual protection;
A first switching card connected to the first controller has an interface for connecting the switch card; a second switching card is connected to the second controller has an interface for connecting the switch card; storage medium, and the first controller, the second controller is connected, for storing data; wherein, the first controller proceeds to a ho, after receiving the first data to be stored, to calculate the first to be stored when the target information data storage apparatus, when the target is a storage device when the storage device, said first data to be stored in said storage medium, when the destination device is not the storage device, via the first switching the card information of the first target storage device and the first data to be stored be stored data is sent.
2. The memory device according to claim 1, wherein: said first switch card having an interface for connecting two switching cards;
The second switch having an interface card for connecting two switching cards.
3. The memory device of claim 1 or claim 2, wherein said first switch card memory device further configured to:
On receiving information of the second target storage device for storing data to be sent to a storage device and a second data to be stored;
Determining whether the storage device is a target storage device information of the second data to be stored; forwarding if the determination result is NO, put the second data to be stored, and a second target storage device information data to be stored to a next storage device .
4. The storage device 1, claim 2 or claim 3, wherein:
The first controller further configured to receive a third data to be stored, computing a third target storage device information data to be stored, and by being connected between the first controller and the second controller, said the third data to be stored, a third target storage device for storing data information to be sent to the second controller;
A second controller for issuing said third data to be stored by the second switch card, the third target storage device information of the data to be stored.
5. The storage apparatus 4 according to any one of the preceding claims, characterized in that the connection between the first controller and the second controller is a bus connection, the first switching card and the first the connection between the controller bus connection, connected between the second switch card and the second controller is a bus connection.
6. The memory device according to claim 5, wherein said bus is a peripheral device interconnection interface PCIE bus.
7. A memory system, characterized by comprising:
Any two adjacent storage devices of any two adjacent storage devices to the first switch card are interconnected: 1 to 6 storage devices according to any one of the plurality of ring network as claimed in claim DETAILED ring network is two interconnected switch card.
8. The storage system according to claim 7, wherein,
The number of storage devices is four, eight or twelve.
9. A storage system according to claim 7 or claim 8, wherein:
The apparatus of any two adjacent memory card connector of the first switching path through the mesh or cable FC, any two adjacent said second storage apparatus to exchange the card connector through the mesh passages or cable FC.
10. A data transmission method, applied to the storage system, the storage system comprises a plurality of storage devices, each storage device includes a storage medium, two controllers and two switch cards, wherein the storage medium and the said connecting two controllers, each connected to one of said switching controller card, each card exchange and storage device of a switching device adjacent memory card connector, characterized in that, said method comprising:
A first storage device in the first controller receives the first data to be stored, the first storage device is a storage device of the storage system, the first storage device includes a first storage medium, the first controller , the second controller, the first switch card, a second switch card;
A first controller calculates the first storage device for storing data is known to be the first target storage device is the storage system of N storage devices, N being a natural number;
The first storage device for storing data to be sent to the first exchange a memory card adjacent equipment; if the received first data to be stored is not the N-th switch card memory device to exchange cards, forwarding the first data to be stored next adjacent switch card storage device until said N-th memory device receives the first switch card data to be stored;
The N-th switch card storage device for storing data to be sent to said first controller connected to said N-th memory device controller receives the first data to be stored to the first data to be stored into the storage medium of the N-th storage apparatus.
11. The method of claim 10, wherein the first storage device for storing data to be sent to the first exchange a memory card adjacent equipment, comprises;
Said first controller storing first data to be sent to a first switching controller connected to the first card;
A first switching card sends the first data to be stored to give a first switching card connected to the card exchange.
12. The method of claim 10, wherein the first storage device for storing data to be sent to the first exchange a memory card adjacent equipment, comprises;
The first controller transmits the first data to be stored is connected to the second controller; a second storage controller to be the first data to the second card is connected to the second switching controller ;
Said second switching card sends a first data to be stored more second switching card connected to the card exchange.
PCT/CN2013/075370 2013-05-09 2013-05-09 Storage device, storage system, and data transmission method WO2014179957A1 (en)

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