CN1409903A - Encapsulation protocol for linking storage area networks over packet-based network - Google Patents
Encapsulation protocol for linking storage area networks over packet-based network Download PDFInfo
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- CN1409903A CN1409903A CN00817156.4A CN00817156A CN1409903A CN 1409903 A CN1409903 A CN 1409903A CN 00817156 A CN00817156 A CN 00817156A CN 1409903 A CN1409903 A CN 1409903A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1097—Protocols in which an application is distributed across nodes in the network for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
- G06F11/202—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where processing functionality is redundant
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
- H04L69/329—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the application layer [OSI layer 7]
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Abstract
A method and system are disclosed for encapsulating SCSI protocol for data transmission between two or more nodes (110, 112, 100) across a packet-based network (140). The method of the present invention includes the steps of, at each node in the network, identifying all other available nodes on the network, and the remote devices attached to those nodes; representing one or more of the attached remote devices such that they are made available to the node's local host; encapsulating the I/O phases between one or more local hosts and one or more of the remote devices; and repeating the encapsulating step of subsequent I/Os between one or more hosts and one or more devices. The step of encapsulating I/O phases between a local host and a remote device can further comprise encapsulating task management functions, error recovery functions and normal I/O processing function. Each node (130, 120, 150) can be a Fibre Channel-to-SCSI router.
Description
Technical field
The present invention is generally relevant, specifically, relevant with the storage-area networking technology with data and information communication system and their operation.Particularly, the present invention relates to optical-fibre channel storage area network (SAN) and the tunneling (encapsulation protocol) by a packet-based network linking storage area network.
Background of invention
Owing to want increasing rapidly of data quantity stored, add requirement to quicker, more reliable and more high efficiency data access and data managing capacity, made many mechanisms seek the mode of improved storage, visit and management data.In traditional computer network, each memory device only is connected with a server, therefore can only pass through this server access.Connection Service device and memory device and between server and memory device transmission data used computer protocol to be called small computer system interface be the SCSI agreement.More and more along with storing with data retrieved, some mechanisms find that gradually the connection of one to one this or point-to-point is quick inadequately, efficient and reliable for the requirement of supporting growing data access and storage.In addition, today in most of mechanisms, data backup (be copy of data creation, in case data are destroyed or lose) need a large amount of storage data be moved to a backup storage device from a special purpose memory devices by the master computer net and realize.Because the master computer net also is responsible for carrying out daily computer operating, such data that increase move task can cause substantial congested, thereby daily computer operation is slowed down.
Storage area network SAN is the computer network for data store-specific, can help to solve some problems wherein.Storage area network adopts a kind of different more high-performance computer agreement that is called optical-fibre channel (FC) to transmit data.Storage area network has also been eliminated the restriction that is connected one to one between server and the memory device, allows a plurality of servers to be connected with a plurality of memory devices, shares the visit to a plurality of memory devices.This multi-to-multi that is achieved by storage area network connects, and adds fiber channel protocol, makes the data transmission procedure can be quicker, more efficient and more reliable, and is also more manageable.Therefore in addition, storage area network can make data backup realize by it rather than by the master computer net, has reduced online congested of master computer widely, thereby has made the master computer net can much effectively carry out daily operation.
Yet, sell most of memory devices on the market and still dispose small computer system interface.In addition, most of mechanisms have done sizable investment on memory device that adopts small computer system interface and server.Therefore, can be shared for the equipment that makes an optical-fibre channel storage area network with the memory device that adopts SCSI, between these equipment, some storage routers (storage router) must be installed.Specifically, storage router is said so requisite for the data backup process is moved on to storage area network from a master computer net, because what most of data backup memory devices adopted is scsi interface, it is online to be connected to storage area by storage router.Along with the introducing of new computer protocol, storage router becomes day by day and carries out between server, memory device and the storage area network equipment that adopts different agreement fast, seamless communication is necessary.
Yet typical SAN is the local fibre channel net for a specific mechanism or specific place service.These SAN can be quite big, but can not cross over very long distance, because these SAN have by supporting the required given distance limit of infrastructure of optical-fibre channel.For example, fibre channel standard has stipulated to carry out that the span maximum can reach 10km and in the method for communicating that can reach 30km in some cases.Yet in order to realize that the mechanism of optical-fibre channel net must have optical fiber usually or rent special optic fibre from its other party like this, this may be very expensive, in most of the cases can be subjected to the cost restriction.
This is because be used for the business that the optical fiber of bearing fiber channel business can only bearing fiber channel protocol.They can not be shared with other agreements.Therefore, more economical is to adopt a kind of agreement that can be carried the existing network support of ATM business, SONET business and IP operation such as those that are had by telephone operator to carry out the long-distance transmissions data.So SAN is confined to the geographic area (that is, they are confined to local running) that they can be served usually.As if in addition, two or more different SAN of region can not all be that local SAN like that seamlessly interconnects with them mutually, their infrastructure does not exist or expense is too high because connect.
Summary of the invention
Therefore, need a kind of distance that connects, provide support for realizing associating or overall storage area network greater than the current method and system of supporting a plurality of local SAN of distance of fiber channel protocol.
Further say, need a tunneling, can utilize existing communication network, connect a plurality of storage area networks by packet-based procotol or other a such existing communication agreement such as IP, ATM, SONET.
Again furtherly, need a tunneling, can link a plurality of storage area networks with seamless way, make these SAN work together to just look like that they all are local SAN by a packet-based network.
The invention provides a kind of method and system that passes through the tunneling of a plurality of SAN of packet-based network linking, this method and system eliminate basically or reduced with big span situation under adopt relevant defective and the problem of fiber channel protocol.Specifically, the invention provides the method for the different SAN in a kind of seamless more interconnected regions, make them work together to just look like that they all are local SAN.
Specifically, the invention provides a kind of between two or more nodes, carrying out the method and system that transfer of data encapsulates the SCSI agreement by a packet-based network.Method of the present invention is included in the following step that each node in this network is carried out: be identified at every other enabled node and the remote device that is connected on these nodes on this network; Represent one or more remote devices that connect, make them become available for the local host of this node; Be encapsulated in the I/O stage (I/O phase) between one or more local hosts and the one or more remote device; And for the follow-up I/O repetition encapsulation step between one or more main frames and one or more remote device.The I/O stage that is encapsulated between a local host and the remote device can also comprise encapsulation task management function, mistake restore funcitons and common I/O processing capacity.Each node can be an optical-fibre channel-SCSI router.
The present invention has an important techniques advantage, the method and system that is provided can connect distance greater than current a plurality of local SAN in the following distance that allows of fiber channel protocol, and this method and system will provide required support for realizing associating or overall storage area network.
Further say, the present invention has an important techniques advantage, and the tunneling that is provided can utilize existing communication network to connect a plurality of storage area networks by packet-based procotol or other a such existing communication agreement such as IP, ATM, SONET.
The present invention also has an important techniques advantage, and the tunneling that is provided can link a plurality of storage area networks with seamless way by a packet-based network, makes these SAN just work together as if a whole SAN.
Brief Description Of Drawings
Can more intactly understand the present invention from the following description in conjunction with the accompanying drawings and see advantage of the present invention.Same in the accompanying drawings reference numbers is represented same part, wherein:
Fig. 1 is illustrated in the simplified block diagram of realizing method and system of the present invention in the typical SAN environment.
Detailed description of the invention
The accompanying drawing illustration the preferred embodiments of the present invention, same numeral is used for marking same and corresponding part among the figure.
The invention provides a kind of between one or more nodes, encapsulating the method and system of SCSI agreement by the transmission of a packet-based network, this method and system can utilize existing communication network to connect a plurality of different SAN in perhaps region efficiently, economically, makes them just work together as if a storage area network.Therefore, method and system of the present invention can overcome the distance limit of existing optical-fibre channel net effectively, makes the SAN pattern can expand to a plurality of SAN across many miles.For example, the present invention can with one the SAN of company in Los Angeles with another in New York or the SAN of company in Tokyo link.Under the situation of recovery of stomge, the present invention allows a backup library in distant resident, thereby also can guarantee the integrality of data under local situation of being damaged owing to the calamity that resembles fire or the floods.Realize that SAN of the present invention there is no need to be confined to just local the use.
For connect span than fiber channel protocol following some big local SAN of the span that allows, the present invention has defined a tunneling (EP), can operate fiber channel protocol (FCP), it can be propagated by any packet-based transmission facilities such as ATM(Asynchronous Transfer Mode) or Ethernet.Fig. 1 is the simplified block diagram of an embodiment in typical SAN environment of illustration method and system of the present invention.The network 100 of Fig. 1 comprises far main frame 110, and far main frame 110 can be local fibre channel SAN, can visit another and be used for for example local fibre channel SAN 115 of tape backup and disk images.Fibre channel host 110 and fibre channel host 115 are connected respectively on node 120,130 and 150, and these nodes can be optical-fibre channel-SCSI routers, such as the optical-fibre channel-SCSI router by Crossroads Systems company produce and market.Node 120,130 and 150 can be SAN110 and 115 and the interface of network 100 remainders.
Optical-fibre channel-SCSI the router that comprises node 120,130 and 150 can both be realized the EP layer, makes that fiber channel protocol can seamless circulation on packet-based WAN (wide area network) 140.WAN 140 expressions packet-based transmission facilities physically is such as ATM or Ethernet.WAN 140 can be a dedicated link or switching network. Main frame 110 and 115 is connected on their nodes separately by fibre channel links 190.Node 120,130 and 150 respectively is connected on the WAN 140 by network link 192.Fibre channel links 190 can be copper cash or optical fiber link according to the needs of given application.Network link 192 can be copper cash or optical fiber link on demand equally.
Far main frame 110 and local host 115 can comprise a plurality of target devices and a plurality of originating equipment.For example, SAN 115 comprises fibre channel hub (switch) 160, tape library 170 and disk 180.Though only show tape library 170 and disk 180, can have a plurality of start and target device be connected on the fibre channel hub 160, be connected on optical-fibre channel-SCSI router one 50 by it again.Therefore optical-fibre channel SAN 115 can comprise a plurality of main frames and a plurality of originating equipment.
With an expansion Facility Agreement (extender protocol), tunneling for example of the present invention, two or more SAN are linked together need be mapped as the local address of each scsi device on the SAN intermediate address with by the expansion facility, each intermediate address is mapped as at a way address far away on the SAN far away again.This mapping makes can visit at a scsi device on the SAN far away at the originating equipment on the SAN, just look like they all be scsi device on the local SAN that connects at this originating equipment.Like this, one far the equipment on the SAN can be expressed as the equipment that can use the originating equipment on other SAN.------the related application No.------"------that submits " in disclosed a kind of between two or more SAN that connect by SAN expansion facility (tunneling for example of the present invention) method and system of mapping scsi device address.This application is for referencial usely quoted at these row comprehensively because it disclosed a kind of compatible between two SAN the method for mapping scsi device address, can use with the present invention.
The method that method and system of the present invention provides a kind of regulation to communicate by Extended Protocol, just a kind of is an Extended Protocol with the optical-fibre channel data map, make it to decode and return to the method for fiber channel protocol, so as with one in distant the target device on the SAN communicate by letter.Therefore, the present invention has stipulated a kind of agreement that can be used for optical-fibre channel is encapsulated into a packet-based network.This is to transform to expansion Facility Agreement (for the packet based protocol of concrete application) by the data that will send from the agreement (fiber channel protocol) of need expansion, and SAN place conversion in distant returns that former agreement (fiber channel protocol) realizes again.Tunneling of the present invention can be configured to the particular command of a given agreement of conversion, and along with the fiber channel protocol expansion provides new function, this tunneling can expand to the order that comprises that some are new.Any optical-fibre channel order or the message quoted in the present invention all are exemplary rather than exclusive.
The EP layer of method and system of the present invention comprises two parts: Aspen node administration (ANM) and fiber channel protocol-tunneling (FCP-EP).The just any choosing of these titles describes.ANM can think controlling mechanism.It has defined a client-server environment, and each node that feasible a plurality of SAN with a plurality of originating equipments and a plurality of target devices can be used as on the WAN 140 of for example Fig. 1 is managed simultaneously.In the environment of multinode, there is a node to be designated as server node, all nodes (comprising server node) all are client computer.Following message is used for defining and management ANM controlling mechanism:
● client node registration (Client Node Register): be used for registering to server node by a client node.This message has been registered the EP address of client computer, makes server to open connection (if necessary) in the future to this client computer.
● client node target registered (Client Node Target Register): be used for to server node registration FC target device by a client node.This message has been registered all FC target devices of finding on local FC network.
● object table upgrades (Target Table Update); Send by server node, be used for upgrading the global object equipment list of a client computer.Object table upgrades all items that contains for the client computer of all registrations, but does not stipulate the tableau format that client computer is used.Each client computer can format object table with a kind of optimized form of use of each client node his-and-hers watches that makes.
● destination address is freezed (Target Address Freeze): sent by server node, be used for notifying a client node will send an object table updating message, should hang up all FCP-EP outbound messages, up to receiving this object table updating message.
● node is confirmed (Node Acknowledgment): be an acknowledgement frame to ANM, be used for flow control.
FCP-EP can be counted as a kind of data mechanism.It has stipulated partition and reorganization by the FCP frame of WAN 140 transmission.FCP-EP layer itself can be a packet based protocol, has and the very similar payload definition of the payload definition of SCSI-FCP sequence.In when partition, the FCP sequence from local SAN can be divided into that some are less, with the compatible grouping of lower-layer transport protocol (for example, ATM or Ethernet) that will adopt.Message identifier is used for being retained in the sequence information during the partition.Then, will transmit by physical link through the more synthetic frames of the sequence set of partition.In case passed through link, after another node receives these frames, just utilize message identifier reorganization FCP sequence.So these groupings just can be transferred to local SAN by identical form by with their former generating the time.
Following message is used for defining and management FCP-EP data mechanism:
● scsi command (SCSI Command): the information that contains a new FCP order.
● scsi command adds data (SCSI Command Plus Data): the data block that contains the information of a new FCP order and the FCP order that is used for defined.
● scsi data request (SCSI Data Request): the relevant information of volume of transmitted data that contains a write request.This message request is by a certain amount of data of a data volume fields specify, and the data starting point is the relative amount of bias of a relative amount of bias fields specify.
● scsi data (SCSI Data): contain the data block that reading and writing will be used.
● scsi data response (SCSI Data Response): contain a data block and FCP response message.
● SCSI responds (SCSI Response): contain the FCP response message.
● SCSI abort request (SCSI Abort Request): the abort condition that is used for notifying an I/O.
● scsi data is confirmed (SCSI Data Acknowledgement): be an acknowledgement frame to FCP-EP message, be used for flow control.
Method and system of the present invention can be realized in the optical-fibre channel-SCSI router the router one 20,130 and 150 (node 120,130 and 150) in Fig. 1.It is that some are stored in the interior software instruction of memory in optical-fibre channel-SCSI router purely that the present invention can be implemented as, thereby can upgrade to the redaction of the new function with establishment easily.Realize the present invention and do not require on the hardware of existing optical-fibre channel-SCSI router what change is arranged.The memory of storing software instruction of the present invention can be RAM (random access memory) or ROM (read-only memory), perhaps other storage devices.
A kind of embodiment of the present invention can comprise a dynamic discovery mechanism, by means of this mechanism, each node (router) in a multinode embodiment can with other all node communications so that for example initial find Installed System Memory other such nodes.This dynamic discovery mechanism can be used to make each node by a public server and each other node communication.Therefore each node in the network can find other nodes of existing, thus can with its other node communication available, that be connected to target device.Each node can receive this information from each other node, thereby can point out all available on all enabled nodes target devices to main frame that they connect separately or the technical staff who disposes each router (node).
Have at least a router (node) must be designated as server, can realize above-mentioned discovery feature by this server.Also other routers for example can be broken down and carry out being appointed as server under the wrong situation about recovering at public server, perhaps just be appointed as a backup of public server.Server " module " in fact not necessarily will reside in an optical-fibre channel-SCSI router of SAN.It also can be a specific installation that server capability only is provided.Yet an optical-fibre channel-SCSI router can contain and provide server capability.If server capability is provided by an independent equipment, this independent server can be integrated into a not standard network device in SAN, and the router of SAN can with this server communication, receive required information.Therefore, this server is exactly one tangible " server ", rather than an additional function in an optical-fibre channel-SCSI router.
Server capability of the present invention and the dns server in IP network can be done analogy.Dns server is present in the network infrastructure, knows and how to communicate by letter with master server.The agreement that a regulation is arranged, the interior master server of IP network can be found mutually with this agreement.Dynamic discovery mechanism of the present invention provides identical functions in fact, therefore can be integrated into network, and make optical-fibre channel-SCSI router is simple client node, they can intercom mutually and and server communication, obtain the information of relevant any other node on network.
The method and system of tunneling of the present invention can be used by existing internet basic arrangement and other existing procotols.For example, the expansion Facility Agreement can be typical IP network agreement, ATM net or a Gigabit Ethernet agreement, the agreement that perhaps any permission packet is circulated between node.Method and system of the present invention provides a kind of method that data can be transmitted by packaged fiber passage SCSI between any SCSI agreement SAN at extended network two ends.Method and system of the present invention has been stipulated the dynamical fashion of a kind of discovery all available nodes in a network facilities, makes can set up 1 couple of n or the n relation to n between a plurality of nodes (router) of a plurality of target devices and originating equipment having.Each node (router) all is the accessing points of the SAN of a correspondence.
By packaged fiber channel protocol message, method and system of the present invention can make them far can obtain decoding and work and can not lose or be damaged in the SAN at one by the message of middle WAN 140 transmission standardizations.Therefore, standardized message can arrive a far SAN and do not need the specialized protocol form from a local SAN by WAN140.
When operation, realize that optical-fibre channel of the present invention-SCSI router carries out when online at first for one in a storage area network 110 or 115, it is registered to specified server, to network identity itself, and receive the information of the scsi target device that each other node of existing on relevant this network and each node can lead to by exchange message.Equally, specified server can detect an optical-fibre channel-SCSI router owing to safeguard or break down and the incident withdrawn from from network.Can provide this function by pulse (heartbeat) message in the optical-fibre channel SCSI agreement.For a quantity that realizes the node that storage area network of the present invention can contain, not what restriction in theory at present.But, the quantity of node is subjected to the restriction of hardware, particularly is subjected to the restriction of the capacity of the memory in an optical-fibre channel-SCSI router.
The present invention is not limited to be used for the situation that each storage area network all adopts identical fiber channel protocol.For example, the main frame 115 among Fig. 1 can adopt different agreements with main frame 110, and they still can correctly be worked to have adopted tunneling of the present invention.By optical-fibre channel SCSI is packaged into intermediary, the present invention provides enough information for the conversion that occurs between the parallel SCSI network of the optical-fibre channel net of for example expanding facility one side and expansion facility opposite side.The enough information of utilization in the message of the fiber channel protocol of encapsulation, the present invention can carry out the conversion between any two types SCSI network.
Put it briefly, an embodiment of method of the present invention comprises the following steps: to be suspended on the network optical-fibre channel-SCSI router online, this router is communicated by letter with a specified server, to network identity itself, and receives the information of other enabled nodes on the network.This optical-fibre channel-SCSI router also will receive the relevant information that is connected to the available devices on each other network nodes.This process occurs in each node and is suspended to and carries out on the storage area network when online.Like this, method and system of the present invention determines that at each node which other node can be with which equipment being connected on these nodes.
Method of the present invention will each available devices on each node be expressed as one to be had the independent target device of one or several LUN or is expressed as one group of target device with one or several LUN, and makes represented equipment become can to use the online every other main frame of local storage region.This means the equipment on other nodes that each online node represents to be registered, the main frame that makes these equipment become for it is available.
From being connected to being in communication in of some main frames on online optical-fibre channel-SCSI router is can be packed, send via WAN 140 expansion facilities by available devices, similarly, the message through encapsulation can be transferred to its local host after local node receives.Therefore, the present invention can be encapsulated in a local host and hereto main frame become I/O stage between some remote devices that can lead to.These I/O stages that encapsulate between a local host and remote device can comprise for example command phase, data phase and response phase.
Therefore, a main frame can be encapsulated an order by the optical-fibre channel that cooperates with it-SCSI router (node) after, send to the ground node far away that a premise equipment that will be sent to this order cooperates by expansion facility (WAN 140).This ground node far away will transfer to this premise equipment after will ordering decapsulation to this.This equipment then can echo back data or response, and perhaps data and response sends to the node that cooperates with the originating equipment that sends order (main frame) after this ground node encapsulation far away.The node that cooperates with this initiation main frame receives response or data or the two, just it is carried out transferring to this main frame after the decapsulation.The order of order, data and/or response can comprise the I/O stage of a need encapsulation.The invention provides tunneling and still do not change the data that send between main frame and the equipment in any other mode.
Repeat to be encapsulated in the step in the I/O stage between a local host and the remote device according to the needs of follow-up I/O.Can carry out encapsulation between a plurality of main frames of the node that is connected to a plurality of and a plurality of devices communicatings, these all main frames and node belong to a plurality of this locality or SAN far away respectively.Like this, method and system of the present invention has been set up a kind of initial network configuration, communicates by letter with a plurality of far the keeping between other local routers between the router or in same SAN at one or more far SAN at a plurality of local routers of a local SAN.
The step of encapsulation I/O can also comprise the particular command and the message of optical-fibre channel, SCSI or other agreements that encapsulation is given.For example, can the encapsulation task management function, mistake restore funcitons and other I/O processing capacities.In addition, method and system of the present invention can expand to easily to some additional command and the message that can add on the existing protocol same encapsulation function is provided.
The invention provides a SAN mode expansion to the ability of distance greater than a plurality of SAN of span that current fiber channel protocol allows.The invention provides the more interconnected ability that is in the SAN of the diverse geographic location such as different cities, make them to carry out work with seamless way, just look like they to have constituted an independent local SAN such.In addition, with regard to recovery of stomge, the present invention allows a backup library in distant resident, thereby also can guarantee the integrality of data under local situation of being damaged owing to certain fault or calamity.
Though abovely the present invention has been done detailed description, should be understood that the explanation of being done is exemplary rather than restrictive in conjunction with exemplary embodiment.Therefore, be appreciated that various changes and other execution modes of the present invention of the details of these embodiment of the present invention all are conspicuous, can realize with reference to this explanation by those skilled in the art that.All such changes and other execution mode all should be within the spirit and scope of the invention that appended claims provides.
Claims (45)
1. one kind for carrying out the method that transfer of data encapsulates the SCSI agreement by a packet-based network between two or more nodes, and described method is included in the following step that each node is carried out:
(a) every other enabled node and the remote device that is connected on each described enabled node on the described network of sign;
(b) the one or more described remote devices of expression make them become available for one or more local hosts;
(c) be encapsulated in I/O (I/O) stage between one or more described local hosts and the one or more described remote device; And
(d) be follow-up I/O stage repeating step (c).
2. the process of claim 1 wherein that the described I/O stage comprises a command phase, a data stage and a response phase.
3. the process of claim 1 wherein that the described I/O stage of encapsulation comprises a specific command of packaged fiber passage or SCSI agreement.
4. the method for claim 3, wherein said specific command is a task management functions, mistake restore funcitons or other I/O processing capacities.
5. the process of claim 1 wherein that each is connected respectively on the storage area network (SAN) with communication mode in described two or more nodes.
6. the method for claim 5, each all is at separately a SAN and an interface between the described packet-based network in wherein said two or more nodes.
7. the method for claim 5, one of wherein said SAN is a backup library.
8. the process of claim 1 wherein that each described node all is an optical-fibre channel-SCSI router.
9. the process of claim 1 wherein that described SCSI agreement is an optical-fibre channel SCSI agreement.
10. the process of claim 1 wherein that described packet-based network is an ATM(Asynchronous Transfer Mode) net, Ethernet, IP network or SONET net.
11. the process of claim 1 wherein that described packet-based network is a wide area network (WAN).
12. the process of claim 1 wherein that described packet-based network is a dedicated link.
13. the process of claim 1 wherein that described packet-based network is a switching network.
14. the process of claim 1 wherein that described expression step also comprises the following steps:
One or more described remote device local addresss separately that are connected on the node are mapped as an intermediate address; And
At another node each described intermediate address is mapped as a way address far away.
15. the process of claim 1 wherein that described encapsulation step also comprises the following steps:
With the described I/O stage from described SCSI protocol conversion to and the relevant agreement of described packet-based network; And
At a ground node far away described I/O phase transformation is returned described SCSI agreement.
16. the method for claim 15, wherein relevant with described packet-based network described agreement is an ATM(Asynchronous Transfer Mode) agreement, Ethernet protocol, IP agreement or sonet protocol.
17. the process of claim 1 wherein that described identification of steps also comprises by a public server dynamically finds every other enabled node and is connected to equipment on the described enabled node.
18. the method for claim 17 has at least one to be designated as described public server in wherein said two or more nodes.
19. the method for claim 17, wherein said public server are specific installations that separates with described node.
20. also comprising by a pulse message, the method for claim 17, described method determined whether that at described public server a node withdraws from from described network.
21. the process of claim 1 wherein that described packet-based network is the network that any permission packet is circulated between node.
22. the process of claim 1 wherein that described two or more nodes can adopt different network protocol to be connected on the SAN with communication mode separately.
23. one kind for carrying out the system that transfer of data encapsulates the SCSI agreement by a packet-based network between two or more nodes, described system comprises at each node:
(a) be used for identifying every other enabled node and the instruction that is connected to the remote device on each described enabled node on the described network;
(b) be used for representing the instruction of one or more described remote devices, make them become available for one or more local hosts;
(c) be used for being encapsulated in the instruction in I/O (I/O) stage between one or more described local hosts and the one or more described remote device; And
(d) be used for instruction into follow-up I/O stage repeating step (c).
24. the system of claim 23, the wherein said I/O stage comprises a command phase, a data stage and a response phase.
25. the system of claim 23, wherein all instructions are stored in the memory of each described intranodal.
26. the system of claim 23, the wherein said instruction that is used for encapsulating the described I/O stage comprises and is used for the instruction of a specific command of packaged fiber passage or SCSI agreement.
27. the system of claim 26, wherein said specific command is a task management functions, mistake restore funcitons or other I/O processing capacities.
28. the system of claim 23, described system also comprise the storage area network (SAN) that described two or more nodes connect respectively with communication mode.
29. the system of claim 28, each all is at separately a SAN and an interface between the described packet-based network in wherein said two or more nodes.
30. the system of claim 28 has at least one to be a backup library among the wherein said SAN.
31. the system of claim 23, wherein each described node all is an optical-fibre channel-SCSI router.
32. the system of claim 23, wherein said SCSI agreement are optical-fibre channel SCSI agreements.
33. the system of claim 23, wherein said packet-based network is an ATM(Asynchronous Transfer Mode) net, Ethernet, IP network or SONET net.
34. the system of claim 23, wherein said packet-based network is a wide area network (WAN).
35. the system of claim 23, wherein said packet-based network is a dedicated link.
36. the system of claim 23, wherein said packet-based network is a switching network.
37. the system of claim 23, the wherein said instruction that is used for representing also comprises:
Be used for one or more described remote device local addresss separately that are connected on the node are mapped as the instruction of an intermediate address; And
Be used for each described intermediate address being mapped as the instruction of a way address far away at another node.
38. the system of claim 23, the wherein said instruction that is used for encapsulating also comprises:
Be used for of the instruction of described I/O stage from described SCSI protocol conversion to an agreement relevant with described packet-based network; And
Be used for described I/O phase transformation being returned the instruction of described SCSI agreement at a ground node far away.
39. the system of claim 38, wherein relevant with described packet-based network described agreement is an ATM(Asynchronous Transfer Mode) agreement, Ethernet protocol, IP agreement or sonet protocol.
40. the system of claim 23, described system also comprises a public server, and wherein, the described instruction that is used for identifying also comprises and is used for dynamically finding every other enabled node and being connected to the instruction of the equipment on the described enabled node by described public server.
41. the system of claim 40 has at least one to be designated as described public server in wherein said two or more nodes.
42. the system of claim 40, wherein said public server is a specific installation that separates with described node.
43. the system of claim 40, described system also comprises the instruction that is used for a pulse message, has determined whether that at described public server a node withdraws from from described network by described pulse message.
44. the system of claim 23, wherein said packet-based network is the network that any permission packet is circulated between node.
45. the system of claim 23, wherein said two or more nodes can adopt different network protocol to be connected on the SAN with communication mode separately.
Applications Claiming Priority (2)
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|---|---|---|---|
| US16519499P | 1999-11-12 | 1999-11-12 | |
| US60/165,194 | 1999-11-12 |
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| CN00817156.4A Pending CN1409903A (en) | 1999-11-12 | 2000-11-13 | Encapsulation protocol for linking storage area networks over packet-based network |
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| EP (1) | EP1240575A2 (en) |
| JP (1) | JP2003517765A (en) |
| CN (1) | CN1409903A (en) |
| AU (1) | AU4707001A (en) |
| CA (1) | CA2391353A1 (en) |
| WO (1) | WO2001044891A2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101116069B (en) * | 2005-03-28 | 2011-01-26 | 思科技术公司 | Zone based quality of service in a fibre channel fabric |
| CN1806466B (en) * | 2003-04-16 | 2011-05-18 | 英特尔公司 | Architecture, method and system of multiple high-speed servers for WDM based photonic burst-switched networks |
| CN101494643B (en) * | 2008-01-24 | 2012-03-28 | 中国移动通信集团公司 | Method, device and system for exiting distributed wireless access system |
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| GB2372600B (en) * | 2001-02-27 | 2003-02-19 | 3Com Corp | Network area storage block and file aggregation |
| US7114009B2 (en) * | 2001-03-16 | 2006-09-26 | San Valley Systems | Encapsulating Fibre Channel signals for transmission over non-Fibre Channel networks |
| US6968369B2 (en) * | 2001-09-27 | 2005-11-22 | Emc Corporation | Remote data facility over an IP network |
| US7020814B2 (en) * | 2003-03-18 | 2006-03-28 | Cisco Technology, Inc. | Method and system for emulating a Fiber Channel link over a SONET/SDH path |
| US6925533B2 (en) | 2003-05-07 | 2005-08-02 | International Business Machines Corporation | Virtual disk image system with local cache disk for iSCSI communications |
| US11108591B2 (en) | 2003-10-21 | 2021-08-31 | John W. Hayes | Transporting fibre channel over ethernet |
| US7586942B2 (en) | 2003-12-09 | 2009-09-08 | Dell Products L.P. | Identifying host computers at a physical layer |
| US7634582B2 (en) | 2003-12-19 | 2009-12-15 | Intel Corporation | Method and architecture for optical networking between server and storage area networks |
| US7447788B2 (en) | 2004-01-27 | 2008-11-04 | Dell Products L.P. | Providing host information to devices in multi SCSI transport protocols |
| US8886778B2 (en) * | 2005-04-29 | 2014-11-11 | Netapp, Inc. | System and method for proxying network management protocol commands to enable cluster wide management of data backups |
| CN100353307C (en) * | 2006-02-16 | 2007-12-05 | 杭州华三通信技术有限公司 | Storage system and method of storaging data and method of reading data |
| JP5203041B2 (en) * | 2008-05-22 | 2013-06-05 | エヌイーシーコンピュータテクノ株式会社 | Network system, network connection method, connection device, connection card |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5519695A (en) * | 1994-10-27 | 1996-05-21 | Hewlett-Packard Company | Switch element for fiber channel networks |
| US5768623A (en) * | 1995-09-19 | 1998-06-16 | International Business Machines Corporation | System and method for sharing multiple storage arrays by dedicating adapters as primary controller and secondary controller for arrays reside in different host computers |
| JPH09251437A (en) * | 1996-03-18 | 1997-09-22 | Toshiba Corp | Computer device and continuous data server device |
| US5959994A (en) * | 1996-08-19 | 1999-09-28 | Ncr Corporation | ATM/SONET network enhanced as a universal computer system interconnect |
| US5925119A (en) * | 1997-03-28 | 1999-07-20 | Quantum Corporation | Computer architecture for automated storage library |
| US5941972A (en) * | 1997-12-31 | 1999-08-24 | Crossroads Systems, Inc. | Storage router and method for providing virtual local storage |
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2000
- 2000-11-13 CN CN00817156.4A patent/CN1409903A/en active Pending
- 2000-11-13 CA CA002391353A patent/CA2391353A1/en not_active Abandoned
- 2000-11-13 JP JP2001545919A patent/JP2003517765A/en not_active Withdrawn
- 2000-11-13 AU AU47070/01A patent/AU4707001A/en not_active Abandoned
- 2000-11-13 WO PCT/US2000/042087 patent/WO2001044891A2/en not_active Application Discontinuation
- 2000-11-13 EP EP00992795A patent/EP1240575A2/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1806466B (en) * | 2003-04-16 | 2011-05-18 | 英特尔公司 | Architecture, method and system of multiple high-speed servers for WDM based photonic burst-switched networks |
| CN101116069B (en) * | 2005-03-28 | 2011-01-26 | 思科技术公司 | Zone based quality of service in a fibre channel fabric |
| CN101494643B (en) * | 2008-01-24 | 2012-03-28 | 中国移动通信集团公司 | Method, device and system for exiting distributed wireless access system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003517765A (en) | 2003-05-27 |
| EP1240575A2 (en) | 2002-09-18 |
| AU4707001A (en) | 2001-06-25 |
| CA2391353A1 (en) | 2001-06-21 |
| WO2001044891A2 (en) | 2001-06-21 |
| WO2001044891A3 (en) | 2002-01-24 |
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