CN110166558A - A kind of communication means, device and the equipment of more control storage clusters - Google Patents
A kind of communication means, device and the equipment of more control storage clusters Download PDFInfo
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- CN110166558A CN110166558A CN201910439566.7A CN201910439566A CN110166558A CN 110166558 A CN110166558 A CN 110166558A CN 201910439566 A CN201910439566 A CN 201910439566A CN 110166558 A CN110166558 A CN 110166558A
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- 238000004891 communication Methods 0.000 title claims abstract description 57
- 230000006870 function Effects 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000004590 computer program Methods 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 10
- 239000003999 initiator Substances 0.000 description 13
- 230000005540 biological transmission Effects 0.000 description 4
- 238000000151 deposition Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
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Classifications
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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
- H04L67/104—Peer-to-peer [P2P] networks
- H04L67/1044—Group management mechanisms
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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]
Abstract
The invention discloses communication means, device, equipment and computer readable storage mediums that one kind controls storage cluster more, are applied to any memory node in more control storage clusters, and each memory node has the function of transmitting terminal and target side in SCSI protocol simultaneously；This method comprises: receiving scsi command, the LUN ID that scsi command carries is obtained；If LUN ID is default specified ID, it is determined that scsi command is sent more by controlling the memory node in storage cluster, and data needed for memory node corresponding with scsi command are returned to the memory node for sending scsi command；If LUN ID is the LUN ID at user rs host end, it is determined that scsi command is sent by user rs host end, and data needed for user rs host corresponding with scsi command end are returned to user rs host end.As only needing scsi command corresponding data needed for transmitting terminal returning to transmitting terminal, communication efficiency is substantially increased.
Description
Technical field
The present invention relates to more control storage cluster technical fields, and the communication of storage cluster is controlled more specifically to one kind more
Method, apparatus, equipment and computer readable storage medium.
Background technique
It is being communicated using SCSI (small computer system interface, small computer system interface)
Before need to establish an ITN (Initiator Target Nexus), the ITN be SCSI Initiator to SCSI Target
Connection, based on this connection, SCSI Initiator and SCSI Target have a unidirectional transmission channel, specifically,
SCSI Initiator is for sending scsi command, and SCSI Target is used to receiving and handling scsi command, and returns to execution
State.And SCSI needs carrier to be transmitted, this transport protocol there have been FCP-SCSI, iSCSI etc. based on SCSI.Its
In, FCP-SCSI is ITN to be established by FCP fiber channel protocol, and SCSI protocol is transmitted by optical fiber, and iSCSI is then benefit
The communication of SCSI protocol is realized with internet.Many manufacturers are to realize to control the mutual of storage clusters by FCP-SCSI more at present
Connection, when the memory node in usually more control storage clusters receives scsi command, directly the corresponding data of scsi command are returned
Back to the transmitting terminal of scsi command, but user rs host end and memory node may be not for data needed for same scsi command
It is identical, for example for this scsi command of SCSI Inquiry Device Identification VPD page, need to return
Need to obtain the UID of lun comprising 3h to the DESIGNATOR TYPE at user rs host end；Need to return to memory node
DESIGNATOR TYPE then only obtains cluster id and node id comprising 0h；In this case if no matter receiving client
The scsi command that host side or memory node are sent directly return to corresponding data it is possible that return mistake data or
Person returns to the case where data of extra data or returning part missing, and communication efficiency is lower.
Lead in conclusion the scheme that memory node carries out the corresponding communication of SCSI in more control storage clusters of the prior art exists
Believe the lower problem of efficiency.
Summary of the invention
It controls the communication means of storage cluster, device, equipment the object of the present invention is to provide one kind more and computer-readable deposits
Storage media is able to solve memory node in more control storage clusters of the prior art and lead to existing for the scheme of the corresponding communication of SCSI
Believe the lower problem of efficiency.
To achieve the goals above, the invention provides the following technical scheme:
A kind of communication means of more control storage clusters is applied to any memory node in more control storage clusters, described
Each memory node has the function of transmitting terminal and target side in SCSI protocol simultaneously in more control storage clusters；The communication party
Method includes:
Scsi command is received, the LUN ID carried in the scsi command is obtained；
If the LUN ID is default specified ID, it is determined that the scsi command is by depositing in more control storage clusters
It stores up node to send, and data needed for memory node corresponding with the scsi command is returned to and send depositing for the scsi command
Store up node；
If the LUN ID is the LUN ID at user rs host end, it is determined that the scsi command is by the user rs host end
It sends, and data needed for user rs host corresponding with scsi command end is returned into the user rs host end.
Preferably, further includes:
If the scsi command is the order for obtaining identification information for not including LUN ID, it is determined that the scsi command
It is sent by memory nodes in other more control storage clusters, and by the cluster ID of more control storage clusters belonging to itself and from institute
The node ID belonged in more control storage clusters returns to the memory node for sending the scsi command, so that it is based on the cluster ID
And the node ID realizes communication.
Preferably, further includes:
If can not identify to the scsi command, the information for identifying the scsi command failure is returned into institute
State the transmitting terminal of scsi command.
Preferably, further includes:
Self-operating information is sent to specified control terminal by timing, and the self-operating information includes that memory space occupies
Information and itself information whether normal operation.
Preferably, the default specified ID is 0x55555555.
A kind of communication device of more control storage clusters is applied to any memory node in more control storage clusters, described
Each memory node has the function of transmitting terminal and target side in SCSI protocol simultaneously in more control storage clusters；Described device packet
It includes:
Receiving module is used for: being received scsi command, is obtained the LUN ID carried in the scsi command；
First processing module is used for: if the LUN ID is default specified ID, it is determined that the scsi command is by described
Memory nodes in more control storage clusters are sent, and data will return to hair needed for memory node corresponding with the scsi command
Send the memory node of the scsi command；
Second processing module is used for: if the LUN ID is the LUN ID at user rs host end, it is determined that the SCSI life
It enables and being sent by the user rs host end, and data needed for user rs host corresponding with scsi command end are returned into the client
Host side.
Preferably, further includes:
Third processing module, is used for: if the scsi command is the order for obtaining identification information for not including LUN ID,
It then determines that the scsi command is sent by memory nodes in other more control storage clusters, and controls storage clusters for belonging to itself more
Cluster ID and the memory node for sending the scsi command is returned to from the node IDs in affiliated more control storage clusters, with
It is based on the cluster ID for it and the node ID realizes communication.
Preferably, further includes:
Mistake return module, is used for: if can not identify to the scsi command, will identify the scsi command
The information of failure returns to the transmitting terminal of the scsi command.
A kind of communication equipment of more control storage clusters, comprising:
Memory, for storing computer program；
Processor realizes the communication parties of as above any one more control storage clusters when for executing the computer program
The step of method.
A kind of computer readable storage medium is stored with computer program on the computer readable storage medium, described
The step of as above communication means of any one more control storage clusters is realized when computer program is executed by processor.
The memory node that the application is applied to has transmitting terminal in SCSI protocol while being in more control storage clusters
With the node of the function of receiving end, after memory node receives scsi command, if identifying the LUN ID in scsi command
For default specified ID, then illustrate that scsi command sends for other memory nodes in same more control storage clusters, therefore straight
It connects data needed for the corresponding memory node of scsi command is sent the scsi command and returns to corresponding memory node；If identification
The LUN ID in scsi command is user rs host end LUN ID out, then illustrates that scsi command sends for user rs host end, therefore straight
It connects data needed for the corresponding user rs host end of scsi command is sent the scsi command and returns to user rs host end；Due to connecing
The transmitting terminal of the scsi command is determined after receiving scsi command, and then only needs the scsi command needed for transmitting terminal corresponding to number
According to transmitting terminal is returned to, avoids and directly return to return mistake caused by corresponding data after receiving scsi command in the prior art
Data or the case where returning to the data of extra data or returning part missing, occur, to substantially increase communication effect
Rate.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of flow chart of the communication means of more control storage clusters provided in an embodiment of the present invention；
Fig. 2 is in a kind of communication means of more control storage clusters provided in an embodiment of the present invention for same more control storage collection
The communication scheme that group realizes；
Fig. 3 is in a kind of communication means of more control storage clusters provided in an embodiment of the present invention for multiple more control storage collection
The communication scheme that group realizes；
Fig. 4 is a kind of structural schematic diagram of the communication device of more control storage clusters provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, it illustrates a kind of processes of the communication means of more control storage clusters provided in an embodiment of the present invention
Figure, the communication means are applied to any memory node in more control storage clusters, and it is same to control each memory node in storage cluster more
When have the function of transmitting terminal and target side in SCSI protocol；The communication means may include:
S11: receiving scsi command, obtains the LUN ID carried in scsi command.
A kind of execution subject of the communication means of more control storage clusters provided in an embodiment of the present invention can be corresponding logical
T unit, and the communication device can integrate in mostly each memory nodes of control storage clusters, therefore the embodiment of the present invention mentions
The execution subject of the communication means of the more control storage clusters of one kind of confession can be memory node.Wherein, memory node has simultaneously
The function and memory node of transmitting terminal and target side can be used as SCSI Initiator and SCSI simultaneously in SCSI protocol
Target can be realized by configuring the parameter of FC driving.
It should be noted that the present embodiment is the interconnection for realizing more control storage clusters by FCP-SCSI, realize
Scheme is identical as the realization principle for corresponding to technical solution in the prior art；Specifically, interconnection is realized for by FCP-SCSI
More control storage clusters in any two respectively as SCSI Initiator to SCSI Target memory node, due to FC assist
After the register of view is active, therefore the optical fiber cable connection of two memory nodes is completed, the FC HBA card at both ends can be certainly
Dynamic broadcast obtains the FC id (IP address that FC id is similar to internet) for communication, then realizes SCSI by FC id
Corresponding ITN connection is established in the login of Initiator and SCSI Target.FC HBA card realize SCSI Initiator and
After the function of SCSI Target, memory node also realizes the function of SCSI Initiator and SCSI Target simultaneously,
SCSI Initiator drives after reporting login log-in events for FC, sends scsi command and obtains SCSI target's
Relevant information, SCSI Target after the scsi command for receiving SCSI Initiator, handle and return request data and
State.It is further to note that user rs host end, mostly control storage cluster are interior and mostly between control storage cluster in the embodiment of the present invention
It is corresponding more control storage clusters and user rs host when mostly control storage cluster is one by FC network implementations data interaction
Communication scheme between end can be as shown in Fig. 2, correspond to more control storage clusters and client when mostly control storage cluster is two
Communication scheme between host side can be as shown in Figure 3.
S12: if LUN ID is default specified ID, it is determined that scsi command is sent out more by controlling the memory node in storage cluster
It send, and data needed for memory node corresponding with scsi command is returned to the memory node for sending scsi command.
It should be noted that since the memory node more controlled in storage cluster can receive in more control storage clusters other
The scsi command of memory node also can receive the scsi command at user rs host end, therefore in order to distinguish the source of scsi command
To determine the data for needing to return, the present embodiment is one virtual LUN of storage system specific assigned in more control storage clusters
(logical unit number, Logical Volume Number ID), i.e., default specified ID.Memory node is receiving scsi command as a result,
Afterwards, the LUN ID carried in scsi command is obtained first, and then determines whether the LUN ID is default specified ID, if it is,
Illustrate that the scsi command is to be sent by other memory nodes for being located at same more control storage clusters, it is therefore desirable to will be with the SCSI
The data (data needed for memory node) for ordering corresponding memory node required when sending the scsi command, which return to, sends SCSI
The memory node of order.Also, the actual LUN ID that itself is assigned can be also supplied to user rs host by each memory node
End, so that user rs host end group operates the read-write etc. of corresponding memory node in this realization, since default specified ID is that storage saves
Point is arranged to distinguish scsi command by memory node or the transmission of user rs host end, therefore the default specified ID is without notifying client
Host side.
S13: if LUN ID is the LUN ID at user rs host end, it is determined that scsi command is sent by user rs host end, and
Data needed for user rs host corresponding with scsi command end are returned into user rs host end.
In order to distinguish user rs host end and memory node, user rs host end is in the memory node hair into more control storage clusters
When sending scsi command, the LUN ID of itself is perhaps carried, it is visitor that thus memory node carries in identifying scsi command
After the LUN ID of householder's generator terminal, user rs host corresponding with scsi command end can be sent to data required when the scsi command
(data needed for user rs host end) return to user rs host end.
The memory node that the application is applied to has transmitting terminal in SCSI protocol while being in more control storage clusters
With the node of the function of receiving end, after memory node receives scsi command, if identifying the LUN ID in scsi command
For default specified ID, then illustrate that scsi command sends for other memory nodes in same more control storage clusters, therefore straight
It connects data needed for the corresponding memory node of scsi command is sent the scsi command and returns to corresponding memory node；If identification
The LUN ID in scsi command is user rs host end LUN ID out, then illustrates that scsi command sends for user rs host end, therefore straight
It connects data needed for the corresponding user rs host end of scsi command is sent the scsi command and returns to user rs host end；Due to connecing
The transmitting terminal of the scsi command is determined after receiving scsi command, and then only needs the scsi command needed for transmitting terminal corresponding to number
According to transmitting terminal is returned to, avoids and directly return to return mistake caused by corresponding data after receiving scsi command in the prior art
Data or the case where returning to the data of extra data or returning part missing, occur, to substantially increase communication effect
Rate.
One kind provided in an embodiment of the present invention controls the communication means of storage clusters more, can also include:
If scsi command is the order for obtaining identification information for not including LUN ID, it is determined that scsi command is more by other
The memory node controlled in storage cluster is sent, and is deposited by the cluster ID of more controls storage clusters belonging to itself and from affiliated more controls
Node ID in accumulation returns to the memory node for sending scsi command, is realized and is led to based on cluster ID and node ID for it
Letter.
It should be noted that the storage system of SCSI Initiator and SCSI Target may belong to different more controls
Storage cluster, therefore when being mutually distinguishable, SCSI Standard Inquiry order and SCSI Inquiry can be passed through
Device Identification VPD page obtains Vendor ID, Product ID and ClusterId, NodeId respectively,
Wherein, SCSI Target when returning to Inquiry Device Identification page needs that DESIGNATOR is arranged
TYPE is the mark that 0hvendor specific, ClusterID and NodeID are respectively this more control storage clusters and this node.
After more control storage cluster creations, ClusterID is cluster ID, is unique in local area network relevant to cluster IP address
ID, NodeID are the node ID in more control storage clusters, are the unique identification of node, make position from there through the present embodiment
It can be identified mutually in SCSI Initiator and the SCSI Target of different clusters, and then based on the identification information identified
It can be realized and be located between the memory node of different more control storage clusters by SCSI Read/Write order between each other
Data interaction.As it can be seen that the application can be realized the communication between different storage clusters, respectively stored in perfect more control storage clusters
The function of node.Cluster ID and node ID can be allocated setting according to actual needs, the collection of such as a certain more control storage clusters
Group ID can be 0, and the node ID of any memory node can be WWNN, etc..
One kind provided in an embodiment of the present invention controls the communication means of storage clusters more, can also include:
If can not identify to scsi command, the information for identifying scsi command failure is returned into scsi command
Transmitting terminal.
It should be noted that during being identified to scsi command, in fact it could happen that can not be carried out to scsi command
The case where normal identification then may be that scsi command goes wrong in transmission process, therefore scsi command is identified and is lost at this time
The information lost returns to the transmitting terminal of scsi command, to carry out the transmission of scsi command again by scsi command, to ensure that
The smooth acquisition and processing of scsi command.
One kind provided in an embodiment of the present invention controls the communication means of storage clusters more, can also include:
Self-operating information is sent to specified control terminal by timing, and self-operating information includes memory space occupied information
And itself information whether normal operation.
It should be noted that respectively being stored in the application to guarantee the normal operation for more controlling memory node in storage cluster
Node also needs timing that self-operating information is sent to specified control terminal, is sent by specified control terminal based on memory node
Self-operating information carries out data scrubbing or the operation of fault restoration to corresponding memory node.Specifically, memory space accounts for
May include occupied space size, un-occupied space size etc. with information, itself information whether normal operation include by into
Whether the numbers of operations such as capable read-write can normally identify received scsi command and whether can normally provide reality needed for it
The information such as existing function can also carry out other settings according to actual needs certainly, within the scope of the present invention.
A kind of communication means of more control storage clusters provided in an embodiment of the present invention, default specified ID can be
0x55555555。
It should be noted that storage system is reflected in more control storage clusters due to being limited by user rs host end operating system
Its actual LUN quantity to user rs host end is penetrated generally at 0-1024, therefore will default specified ID setting in the present embodiment
For any influence that is greater than 1111111111 data i.e. and can avoid the mapping to user rs host end, preferably it is in the present embodiment
0x55555555。
The embodiment of the invention also provides the communication devices that one kind controls storage cluster more, deposit as shown in figure 4, being applied to more controls
Any memory node in accumulation, control each memory node in storage clusters has transmitting terminal and mesh in SCSI protocol more simultaneously
Mark the function at end；Device may include:
Receiving module 11, is used for: receiving scsi command, obtains the LUN ID carried in scsi command；
First processing module 12, is used for: if LUN ID is default specified ID, it is determined that scsi command by controlling storage collection more
Memory node in group is sent, and data needed for memory node corresponding with scsi command are returned to and send depositing for scsi command
Store up node；
Second processing module 13, is used for: if LUN ID is the LUN ID at user rs host end, it is determined that scsi command is by visitor
Householder's generator terminal is sent, and data needed for user rs host corresponding with scsi command end are returned to user rs host end.
One kind provided in an embodiment of the present invention controls the communication devices of storage clusters more, can also include:
Third processing module, is used for: if scsi command is the order for obtaining identification information for not including LUN ID, really
Determine scsi command to be sent by memory nodes in other more control storage clusters, and by the cluster ID of more control storage clusters belonging to itself
And the memory node for sending scsi command is returned to from the node ID in affiliated more control storage clusters, so that it is based on cluster
ID and node ID realize communication.
One kind provided in an embodiment of the present invention controls the communication devices of storage clusters more, can also include:
Mistake return module, is used for: if can not identify to scsi command, will identify the letter of scsi command failure
Breath returns to the transmitting terminal of scsi command.
One kind provided in an embodiment of the present invention controls the communication devices of storage clusters more, can also include:
State reporting module, is used for: self-operating information being periodically sent to specified control terminal, self-operating packet
Include memory space occupied information and itself information whether normal operation.
The embodiment of the invention also provides the communication equipments that one kind controls storage cluster more, may include:
Memory, for storing computer program；
Processor realizes that any one as above controls the step of the communication means of storage cluster more when for executing computer program
Suddenly.
The embodiment of the invention also provides a kind of computer readable storage medium, it is stored on computer readable storage medium
Computer program realizes that any one as above controls the step of the communication means of storage cluster more when computer program is executed by processor
Suddenly.
It should be noted that communication device, equipment and the calculating of a kind of more control storage clusters provided in an embodiment of the present invention
The explanation of relevant portion refers to a kind of communication of more control storage clusters provided in an embodiment of the present invention in machine readable storage medium storing program for executing
The detailed description of corresponding part in method, details are not described herein.In addition in above-mentioned technical proposal provided in an embodiment of the present invention with
The consistent part of technical solution realization principle and unspecified is corresponded in the prior art, in order to avoid excessively repeat.
The foregoing description of the disclosed embodiments can be realized those skilled in the art or using the present invention.To this
A variety of modifications of a little embodiments will be apparent for a person skilled in the art, and the general principles defined herein can
Without departing from the spirit or scope of the present invention, to realize in other embodiments.Therefore, the present invention will not be limited
It is formed on the embodiments shown herein, and is to fit to consistent with the principles and novel features disclosed in this article widest
Range.
Claims (10)
1. a kind of communication means of more control storage clusters, which is characterized in that be applied to any storage in more control storage clusters
Node, each memory node has the function of transmitting terminal and target side in SCSI protocol simultaneously in more control storage clusters；
The communication means includes:
Scsi command is received, the LUN ID carried in the scsi command is obtained；
If the LUN ID is default specified ID, it is determined that the scsi command is by the storage section in more control storage clusters
Point is sent, and data needed for memory node corresponding with the scsi command are returned to the storage section for sending the scsi command
Point；
If the LUN ID is the LUN ID at user rs host end, it is determined that the scsi command is sent out by the user rs host end
It send, and data needed for user rs host corresponding with scsi command end is returned into the user rs host end.
2. the method according to claim 1, wherein further include:
If the scsi command is the order for obtaining identification information for not including LUN ID, it is determined that the scsi command is by it
Memory node in his more control storage clusters is sent, and by the cluster ID of more control storage clusters belonging to itself and from affiliated more
Node ID in control storage cluster returns to the memory node for sending the scsi command, so that it is based on the cluster ID and institute
It states node ID and realizes communication.
3. according to the method described in claim 2, it is characterized by further comprising:
If can not be identified to the scsi command, the information for identifying the scsi command failure is returned to described
The transmitting terminal of scsi command.
4. according to the method described in claim 3, it is characterized by further comprising:
Self-operating information is sent to specified control terminal by timing, and the self-operating information includes memory space occupied information
And itself information whether normal operation.
5. according to the method described in claim 4, it is characterized in that, the default specified ID is 0x55555555.
6. a kind of communication device of more control storage clusters, which is characterized in that be applied to any storage in more control storage clusters
Node, each memory node has the function of transmitting terminal and target side in SCSI protocol simultaneously in more control storage clusters；
Described device includes:
Receiving module is used for: being received scsi command, is obtained the LUN ID carried in the scsi command；
First processing module is used for: if the LUN ID is default specified ID, it is determined that the scsi command is by more controls
Memory node in storage cluster is sent, and data needed for memory node corresponding with the scsi command are returned to and send institute
State the memory node of scsi command；
Second processing module is used for: if the LUN ID be user rs host end LUN ID, it is determined that the scsi command by
The user rs host end is sent, and data will return to the user rs host needed for user rs host corresponding with scsi command end
End.
7. device according to claim 6, which is characterized in that further include:
Third processing module, is used for: if the scsi command is the order for obtaining identification information for not including LUN ID, really
The fixed scsi command is sent by memory nodes in other more control storage clusters, and by the collection of more control storage clusters belonging to itself
Group ID and the memory node for sending the scsi command is returned to from the node IDs in affiliated more control storage clusters, for it
Communication is realized based on the cluster ID and the node ID.
8. device according to claim 7, which is characterized in that further include:
Mistake return module, is used for: if can not identify to the scsi command, will identify the scsi command failure
Information return to the transmitting terminal of the scsi command.
9. a kind of communication equipment of more control storage clusters characterized by comprising
Memory, for storing computer program；
Processor, more control storage clusters as described in any one of claim 1 to 5 are realized when for executing the computer program
The step of communication means.
10. a kind of computer readable storage medium, which is characterized in that be stored with computer on the computer readable storage medium
Program is realized when the computer program is executed by processor and controls the logical of storage clusters more as described in any one of claim 1 to 5
The step of letter method.
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