CN102137161B - File-level data sharing and storing system based on fiber channel - Google Patents
File-level data sharing and storing system based on fiber channel Download PDFInfo
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Abstract
A file-level data sharing and storing system based on a fiber channel belongs to the technical field of computer information storage and solves the problems that in the existing file-level data sharing system, the spending of a protocol is larger, and the transmission speed of data is lower. The system comprises a server-side computer, a server optical fiber adapter, a plurality of client-side computers, a plurality of client optical fiber adapters and an optical fiber switchboard, wherein the server-side computer is loaded with a server data transmission module and a server data sharing module; and each client-side computer is loaded with a client data transmission module and a client data sharing module. The file-level data sharing and storing system reduces the spending of the protocol, realizes the sharing of file-level data, and is applicable to small-scale and simple network topology, the sharing of the file-level data and environments with higher requirement on the data transmission speed.
Description
Technical field
The invention belongs to the computer information storage technology field, be specifically related to a kind of file-level data sharing storage system based on optical-fibre channel.
Background technology
The file-level data sharing has the advantages such as support is cross-platform, cross-system, easy expansion take file as sharing unit.The internal network storage platform of a large amount of small and medium databases, office automation and enterprise etc. all needs the centralized stores of file-level data with shared.Development along with network technology, at some vehicles such as aircraft, automotive interior, between each transducer and the calculating unit owing to reasons such as exchanges data, in real time processing, the file-level of data shared also needs, and compare with the applied environment such as enterprise office, there is higher requirement the response time that each assembly of vehicle interior is shared data.In actual application environment, it is the NFS NFS(Network File System that Sun Microsystems proposes that more representative network file is shared agreement); NFS uses user terminal/server framework, adopts remote procedure call (Remote Procedure Call Protocol) mechanism, realizes file access and communicating by letter of sharing between the server and client side by the Ethernet host-host protocol.NFS has experienced development---NFSv1, NFSv2, NFSv3, NFSv4 and the NFSv4.1 (pNFS) of 5 versions since be born altogether.NFSv1 is abandoned now; NFSv2 supports the UDP transmission, and reliability is not high, and transmission performance is low, and the response time is long; NFSv3 provides transmission control protocol TCP(Transmission Control Protocol in transport layer when supporting UDP) support, but do not solve the problem of transmission performance and response time; NFSv4 only provides the support to TCP, simultaneously some intercommunication primitives are combined, improve communication efficiency, and by extra security module, such as network authenticating protocol Kerberos, its design object be by cipher key system for client/server applications provides powerful authentication service, safer application conditions is provided; The improvement purpose of NFSv4.1 is the support that improves express network, the series of improving measures such as interpolation meta data server have been carried out, although satisfied the support of express network, but also cause the too complicated shortcoming of NFSv4.1 deployment and institutional framework, only be fit at present some large-scale computer center's environment.The transport layer of the several versions of this of NFS is used remote procedure call (Remote Procedure Call Protocol) mechanism all the time based on ICP/IP protocol.The share service mechanism of NFS provides access to NFS for the nfs server end to other computer, and client-side program is realized management to shared file by the accesses network file system.And the complexity of ICP/IP protocol and RPC mechanism, even the expense when making the NFS agreement carry out file-sharing in some relatively simple, safe environments for use is also very large.
Optical fiber transmission technique is as a kind of new network and bussing technique, has a lot of advantages physically with respect to Ethernet, as postpone low, reliability is high, anti-interference strong, transmission speed is fast and long transmission distance etc.As the specific implementation of optical fiber transmission technique, optical-fibre channel is widely used at present, and a lot of companies have developed ripe optical-fibre channel hardware product, comprises that fiber adapter, router reach relevant switching equipment etc.Fiber channel protocol based on optical fiber transmission technique organically merges passage technology and network technology, not only for network, memory device provide practical, extendible data exchange standard, and can be used for high performance memory, large-scale data center etc.Fiber channel protocol is divided into 5 layers: FC-0, FC-1, FC-2, FC-3, FC-4.Wherein FC-0 is physical link layer; FC-1 is byte of sync and coding layer; FC-2 is frame protocol, has defined COS that BTU, network topology structure and the agreement used in the optical-fibre channel provide etc.FC-2 layer data content is visible to calling of upper strata, but is transparent to its this layer, can realize FC-2 layer frame transfer function by calling.With respect to NFS based on Ethernet, fiber channel protocol more adapts to the vehicles such as the particular surroundingss higher to requirement of real-time such as aircraft, automotive interior transducer and calculating unit data sharing.
The optical-fibre channel technology is widely used equally at area information storage, the representative storage area network that is based on optical-fibre channel (FC-SAN).Storage area network is a kind of framework in the Computerized Information Processing Tech, and it couples together server and long-range computer memory device (such as disk array, tape library), so that these memory devices seem similarly to be local.Provide file-level data sharing service different with NFS, although adopted the optical-fibre channel technology, storage area network only provides the data sharing service of block device level at present, can't satisfy the application demand of some specific file-level data sharings.
Along with the development of information technology, each assembly automation of the vehicle interiors such as automobile, aircraft and intelligent degree are more and more higher.The embedded real-time operating system that satisfies this application also more and more appeared at the various vehicles in.What use at present is the Vxworks embedded system more widely.The Vxworks embedded system comprises kernel, I/O system, file system and network support.Wherein, kernel provides some to interrupt the mechanism such as processing and interprocess communication.The I/O subsystem has been realized a fast and flexible and I/O system ANSI C programming language compatibility.File system is supported dosFs, rt11Fs, four kinds of file system such as rawFs and tapeFs.The Vxworks embedded system provides " transparent " access to other VxWorks embedded system and TCP/IP network system, comprises socket, RPC, Simple Network Management Protocol SNMP(Simple Network Management Protocol) etc.The Vxworks embedded system is supported the NFS agreement equally, can carry out the file-level data sharing by NFS between the different system of use Vxworks embedded system in the situation of networking.
Summary of the invention
The present invention proposes a kind of file-level data-sharing systems based on optical-fibre channel, and the protocol overhead that solves the existence of existing file DBMS shared system is larger, the problem that data transmission bauds is lower.
A kind of file-level data-sharing systems based on optical-fibre channel of the present invention, comprise the server end computer, the server fiber adapter, N platform client computer, N client's fiber adapter and optical fiber switch, server end computer through server fiber adapter is connected optical fiber switch with connection line of optic fibre, client's fiber adapter that N platform client computer passes through separately respectively is connected optical fiber switch with connection line of optic fibre, server end, N platform client fiber adapter includes memory and register, register has three kinds of states, is respectively wait state, ready for sending state and ready for receiving state; N=1～31; It is characterized in that:
Described server end computer is loaded with server data transport module and server data sharing module, and each client computer all is loaded with customer data transport module and customer data sharing module;
A. described server data transport module comprises server frame transmission control unit and server fiber adapter driver element; Described customer data transport module comprises client's frame transmission control unit and client's fiber adapter driver element;
A1. described server frame transmission control unit or client's frame transmission control unit sending and receiving to Frame in server end computer or client computer are controlled;
When sending Frame, server frame transmission control unit or client's frame transmission control unit obtain Frame from server data sharing module or customer data sharing module, after adding frame head, give server fiber adapter driver element or the transmission of client's fiber adapter driver element with the Frame that adds frame head, frame head comprises frame number and flag of frame;
During receiving data frames, the Frame that server frame transmission control unit or client's frame transmission control unit reception server fiber adapter driver element or client's fiber adapter driver element are received, judge that according to frame head this Frame is whether complete and meet interaction sequences, then described Frame to be passed to server data sharing module or customer data sharing module, otherwise to described Frame error correction or announcement server fiber adapter driver element or client's fiber adapter driver element request repeat;
Described Frame comprises carry claim frame, carry answer frame, file operation requests frame, file operation answer frame, unload request frame and unloading answer frame;
A2. described server fiber adapter driver element or client's fiber adapter driver element are when sending Frame, by direct memory access DMA the Frame that server frame transmission control unit or the transmission of client's frame transmission control unit come is write in the memory of server fiber adapter or client's fiber adapter, the state of the register of server fiber adapter or client's fiber adapter is revised as the ready for sending state by wait state; When server fiber adapter or client's fiber adapter detect buffer status and be the ready for sending state, the Frame in self memory is sent; After sending end, server fiber adapter or client's fiber adapter are revised as wait state with buffer status, and send end by interrupt notification server frame transmission control unit or client's frame transmission control unit;
Server fiber adapter driver element or client's fiber adapter driver element are when receiving data frames, first in server end or client computer, be ready to core buffer, then the memory buffer regional address is write in the memory of server fiber adapter or client's fiber adapter, the register with server fiber adapter or client's fiber adapter is revised as the ready for receiving state again; It is receiving data frames behind the ready for receiving state that server fiber adapter or client's fiber adapter detect self buffer status, by DMA Frame is write in previous ready server end or the client computer core buffer again; After writing end, server fiber adapter or client's fiber adapter are revised buffer status, then by interrupt notification server frame transmission control unit or client's frame transmission control unit end of transmission;
B. described server data sharing module comprises server carry unit and server file system elements; Carry claim frame in the mutual Frame of server carry cell processing and server frame transmission control unit, carry are replied frame, unload request frame and unloading and are replied frame, file operation requests frame and file operation answer frame in the mutual Frame of server file system cell processing and server frame transmission control unit;
When B1. described server carry unit receives the carry claim frame from server frame transmission control unit, judge whether client computer host name and directory name in the carry claim frame be legal, that the server directory handle that then generates the success of an expression carry is placed in the carry answer frame, otherwise the server directory handle that generates the failure of an expression carry is placed on carry and replys in the frame, carry is replied frame again and passes to the frame transmission control unit; When server carry unit receives the unload request frame from server frame transmission control unit, nullify the server directory handle in the unload request frame, will unload the answer frame and pass to server frame transmission control unit;
The legal computer with this host name that refers to of described host name and directory name has the carry authority to this catalogue;
When B2. described server file system unit receives the file operation requests frame of client from server frame transmission control unit, judge whether the information in the file operation requests frame is legal, legal then according to the handle in the file operation requests frame, operand, operation and parameter are carried out file operation, and judge whether file operation is successful, then to generate a successful operating result of expression operation to be placed in the file operation answer frame together with data, otherwise the operating result that generates an expression operation failure is placed on file operation and replys in the frame, file operation is replied frame again and passes to the frame transmission control unit; The operating result that does not conform to an expression of rule generation operation failure is placed on file operation and replys in the frame, file operation is replied frame again and passes to the frame transmission control unit;
The legal file operation requests frame that refers to of information in the file operation requests frame comprises the server directory handle, and client computer has the authority of executable operations to operand;
C. described customer data sharing module comprises client's carry unit and client file system unit; Carry claim frame in the mutual Frame of client's carry cell processing and client's frame transmission control unit, carry are replied frame, unload request frame and unloading and are replied frame, file operation requests frame and file operation answer frame in the mutual Frame of client file system cell processing and client's frame transmission control unit;
C1. described client's carry unit receives the carry order that client computer sends, and generates the carry claim frame, and it is passed to client's frame transmission control unit;
Client's carry unit receives carry from client's frame transmission control unit and replys frame, judge carry replys whether comprise the server directory handle that represents the carry success in the frame, then the server directory handle to be saved in the client computer, send the signal of expression carry success to client computer, otherwise send the signal of expression carry failure to client computer;
Described client's carry unit unloads order according to the user and generates the unload request frame, and the server directory handle that is kept in the client computer that will unload is put into the unload request frame, and it is passed to client's frame transmission control unit;
Client's carry unit receives unloading from client's frame transmission control unit and replys frame, and the server directory handle that is kept in the client computer is nullified, and sends the successful signal of expression unloading to client computer;
C2. described client file system unit receives the file manipulation command that client computer sends, and server directory handle, operand, operation and parameter in the file manipulation command are put into the file operation requests frame, passes to client's frame transmission control unit;
Described client file system unit receives file operation from client's frame transmission control unit and replys frame, and the operating result that file operation is replied in the frame passes to client computer together with data.
Described file-level data-sharing systems is characterized in that:
Described carry claim frame comprises client computer host name and server directory name; Described carry is replied frame and is comprised the server directory handle of expression carry success or the server directory handle of expression carry failure; Described file operation requests frame comprises server directory handle, operand, operation and parameter, wherein operation comprise file and catalogue newly-built, read, write, deletion, rename, attribute modification; Operating result and the data that frame comprises the successful operating result of expression operation, expression operation failure are replied in described file operation; Described unload request frame comprises the server directory handle that will unload; Described unloading is replied frame and is comprised the unload request result.
The present invention is applicable to the network environment relatively simple, that fail safe is higher, specific aim is stronger, existing storage area network based on optical-fibre channel, fiber channel protocol is divided into 5 levels, FC-0, FC-1, FC-2, FC-3, FC-4, can in the face of complicated network environment, can satisfy multiple application demand simultaneously, but also cause the larger defective of protocol overhead; The present invention is divided into the carry claim frame with Frame in realization, carry is replied frame, file operation requests frame, file operation answer frame, unload request frame and unloading and replied frame, comprised the needed data frame type of file-level data sharing, each Frame is by server data sharing module or client's sharing module generated data frame simultaneously, pass to corresponding data transmission module, transmitted by fiber adapter at last, only need the processing through 2 modules, reduced protocol overhead; The present invention has realized the data sharing of file-level simultaneously, has solved the alternative document shared system, such as NFSv2, and can only be in the problem of ethernet environment work.The present invention can be set up more complicated network by network equipments such as fibre channel medias simultaneously, finishes the data sharing requirement.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
As shown in Figure 1, the embodiment of the invention comprises 1 station server end computer and 2 client computers, server end computer through server fiber adapter is connected optical fiber switch with connection line of optic fibre, 2 client computers respectively client's fiber adapter by separately are connected optical fiber switch with connection line of optic fibre, server end, 2 client's fiber adapter include memory and register, register has three kinds of states, is respectively wait state, ready for sending state and ready for receiving state.
The server end computer is loaded with server data transport module and server data sharing module, and each client computer all is loaded with customer data transport module and customer data sharing module;
A. described server data transport module comprises server frame transmission control unit and server fiber adapter driver element; Described customer data transport module comprises client's frame transmission control unit and client's fiber adapter driver element;
B. described server data sharing module comprises server carry unit and server file system elements; Carry claim frame in the mutual Frame of server carry cell processing and server frame transmission control unit, carry are replied frame, unload request frame and unloading and are replied frame, file operation requests frame and file operation answer frame in the mutual Frame of server file system cell processing and server frame transmission control unit;
C. described customer data sharing module comprises client's carry unit and client file system unit; Carry claim frame in the mutual Frame of client's carry cell processing and client's frame transmission control unit, carry are replied frame, unload request frame and unloading and are replied frame, file operation requests frame and file operation answer frame in the mutual Frame of client file system cell processing and client's frame transmission control unit.
The server directory that share by name is arranged on the server end computer can be shared by two client computers, and when client computer 1 needed to share this server directory, its course of work was:
(1) client computer 1 request of sending carry server directory share to self client's carry unit
(2) the carry claim frame is put into the carry request in client's carry unit, passes to the customer data transport module;
(3) the customer data transport module passes to client's fiber adapter with the carry claim frame, and client's fiber adapter sends to the server end computer by optical fiber switch with the carry claim frame;
(4) the server fiber adapter on the server end computer receives the carry claim frame, and the carry claim frame is passed to the server data transport module;
(5) the server data transport module passes to server carry unit with the carry claim frame;
(6) whether the request of server carry unit judges carry is legal, legal through judging request, send carry to the server data transport module and reply frame, the server directory handle 10001 that wherein comprises the success of expression carry, the server directory handle is a unsigned number word, be to represent the carry failure at 0 o'clock, other value representation carries successes;
(7) the server data transport module is replied frame with carry and is passed to the server fiber adapter, is forwarded to client computer 1 through optical fiber switch again;
(8) after the customer data transmission unit of client computer 1 receives carry answer frame by client's fiber adapter, pass to client's carry unit;
(9) client's carry unit is replied from carry and is taken out server directory handle 10001 frame, is stored in the client computer 1 the carry success;
Then, client computer 1 can operate server directory share; Its course of work is:
(1) the client file system unit receives the file manipulation command that client computer 1 sends, and request creates the file of file by name under server directory share;
(2) the customer data sharing module generates the file operation requests frame that comprises server directory handle 10001, file filename, document creation order, parameter, and this document operation requests frame is passed to the customer data transport module;
(3) the customer data transport module by client's fiber adapter, sends to server end computer through optical fiber switch with the file request frame;
(4) the server fiber adapter on the server end computer receives the file request frame, passes to the server data transport module;
(5) the file request frame entered the server file system unit that the server data transport module passes to the server data sharing module again;
(6) the server file system unit extracts document creation order, parameter f ile and server directory handle from Frame, finish the establishment of file f ile by the function of calling local file system, after creating successfully, the server file sharing module sends the successful file operation of expression operation and replys frame, delivery server data sharing module;
(7) the server data sharing module sends Frame to the server fiber adapter, sends to client computer 1 through optical fiber switch;
(8) client's fiber adapter of client computer 1 is replied frame with file operation and is passed to the customer data transport module, passes to the client file system unit in the customer data sharing module again;
(9) the client file system unit obtains to extract operating result after frame is replied in file operation, sends a signal that operation is successful to client computer 1;
Client computer 1 can unload the server directory of carry success; Its course of work is as follows:
(1) client computer 1 sends the request of offload server catalogue share, and the unload request frame that the client's carry unit in the customer data sharing module will comprise the server directory handle 10001 that will unload passes to the client server data transmission module;
(2) the client server data transmission module sends the unload request frame by the client server fiber adapter;
(3) after the server fiber adapter of server end computer is received the unload request frame, pass to the server data transport module;
(4) the server data transport module passes to server carry unit in the server data sharing module with the unload request frame;
(5) server carry unit takes out the server directory handle from the unload request frame, nullifies this handle, transmits unloading and replys frame to the server data transport module;
(6) the server data transport module will unload and reply frame and send by the server fiber adapter;
(7) client's fiber adapter of client computer 1 receives unloading and replys frame, passes to the customer data transmission unit;
(8) the customer data transport module will unload the answer frame and pass to client's carry unit;
(9) client's carry unit log-on server catalogue handle 10001, server directory/share unloads successfully.
Claims (2)
1. file-level data-sharing systems based on optical-fibre channel, comprise the server end computer, the server fiber adapter, N platform client computer, N client's fiber adapter and optical fiber switch, server end computer through server fiber adapter is connected optical fiber switch with connection line of optic fibre, client's fiber adapter that N platform client computer passes through separately respectively is connected optical fiber switch with connection line of optic fibre, server end, N platform client fiber adapter includes memory and register, register has three kinds of states, is respectively wait state, ready for sending state and ready for receiving state; N=1～31; It is characterized in that:
Described server end computer is loaded with server data transport module and server data sharing module, and client computer is loaded with customer data transport module and customer data sharing module;
A. described server data transport module comprises server frame transmission control unit and server fiber adapter driver element; Described customer data transport module comprises client's frame transmission control unit and client's fiber adapter driver element;
A1. described server frame transmission control unit or client's frame transmission control unit sending and receiving to Frame in server end computer or client computer are controlled;
When sending Frame, server frame transmission control unit or client's frame transmission control unit obtain Frame from server data sharing module or customer data sharing module, after adding frame head, give server fiber adapter driver element or the transmission of client's fiber adapter driver element with the Frame that adds frame head, frame head comprises frame number and flag of frame;
During receiving data frames, the Frame that server frame transmission control unit or client's frame transmission control unit reception server fiber adapter driver element or client's fiber adapter driver element are received, judge that according to frame head this Frame is whether complete and meet interaction sequences, then described Frame to be passed to server data sharing module or customer data sharing module, otherwise to described Frame error correction or announcement server fiber adapter driver element or client's fiber adapter driver element request repeat;
Described Frame comprises carry claim frame, carry answer frame, file operation requests frame, file operation answer frame, unload request frame and unloading answer frame;
A2. described server fiber adapter driver element or client's fiber adapter driver element are when sending Frame, by direct memory access DMA the Frame that server frame transmission control unit or the transmission of client's frame transmission control unit come is write in the memory of server fiber adapter or client's fiber adapter, the state of the register of server fiber adapter or client's fiber adapter is revised as the ready for sending state by wait state; When server fiber adapter or client's fiber adapter detect buffer status and be the ready for sending state, the Frame in self memory is sent; After sending end, server fiber adapter or client's fiber adapter are revised as wait state with buffer status, and send end by interrupt notification server frame transmission control unit or client's frame transmission control unit;
Server fiber adapter driver element or client's fiber adapter driver element are when receiving data frames, first in server end or client computer, be ready to core buffer, then the memory buffer regional address is write in the memory of server fiber adapter or client's fiber adapter, the register with server fiber adapter or client's fiber adapter is revised as the ready for receiving state again; It is receiving data frames behind the ready for receiving state that server fiber adapter or client's fiber adapter detect self buffer status, by DMA Frame is write in previous ready server end or the client computer core buffer again; After writing end, server fiber adapter or client's fiber adapter are revised buffer status, then by interrupt notification server frame transmission control unit or client's frame transmission control unit end of transmission;
B. described server data sharing module comprises server carry unit and server file system elements; Carry claim frame in the mutual Frame of server carry cell processing and server frame transmission control unit, carry are replied frame, unload request frame and unloading and are replied frame, file operation requests frame and file operation answer frame in the mutual Frame of server file system cell processing and server frame transmission control unit;
When B1. described server carry unit receives the carry claim frame from server frame transmission control unit, judge whether client computer host name and directory name in the carry claim frame be legal, that the server directory handle that then generates the success of an expression carry is placed in the carry answer frame, otherwise the server directory handle that generates the failure of an expression carry is placed on carry and replys in the frame, carry is replied frame again and passes to the frame transmission control unit; When server carry unit receives the unload request frame from server frame transmission control unit, nullify the server directory handle in the unload request frame, will unload the answer frame and pass to server frame transmission control unit;
The legal computer with this host name that refers to of described host name and directory name has the carry authority to this catalogue;
When B2. described server file system unit receives the file operation requests frame of client from server frame transmission control unit, judge whether the information in the file operation requests frame is legal, legal then according to the handle in the file operation requests frame, operand, operation and parameter are carried out file operation, and judge whether file operation is successful, then to generate a successful operating result of expression operation to be placed in the file operation answer frame together with data, otherwise the operating result that generates an expression operation failure is placed on file operation and replys in the frame, file operation is replied frame again and passes to the frame transmission control unit; The operating result that does not conform to an expression of rule generation operation failure is placed on file operation and replys in the frame, file operation is replied frame again and passes to the frame transmission control unit;
The legal file operation requests frame that refers to of information in the file operation requests frame comprises the server directory handle, and client computer has the authority of executable operations to operand;
C. described customer data sharing module comprises client's carry unit and client file system unit; Carry claim frame in the mutual Frame of client's carry cell processing and client's frame transmission control unit, carry are replied frame, unload request frame and unloading and are replied frame, file operation requests frame and file operation answer frame in the mutual Frame of client file system cell processing and client's frame transmission control unit;
C1. described client's carry unit receives the carry order that client computer sends, and generates the carry claim frame, and it is passed to client's frame transmission control unit;
Client's carry unit receives carry from client's frame transmission control unit and replys frame, judge carry replys whether comprise the server directory handle that represents the carry success in the frame, then the server directory handle to be saved in the client computer, send the signal of expression carry success to client computer, otherwise send the signal of expression carry failure to client computer;
Described client's carry unit unloads order according to the user and generates the unload request frame, and the server directory handle that is kept in the client computer that will unload is put into the unload request frame, and it is passed to client's frame transmission control unit;
Client's carry unit receives unloading from client's frame transmission control unit and replys frame, and the server directory handle that is kept in the client computer is nullified, and sends the successful signal of expression unloading to client computer;
C2. described client file system unit receives the file manipulation command that client computer sends, and generates to comprise server directory handle, operand, operation and parameter and put into the file operation requests frame, passes to client's frame transmission control unit;
Described client file system unit receives file operation from client's frame transmission control unit and replys frame, and the operating result that file operation is replied in the frame passes to client computer together with data.
2. file-level data-sharing systems as claimed in claim 1 is characterized in that:
Described carry claim frame comprises client computer host name and server directory name; Described carry is replied frame and is comprised the server directory handle of expression carry success or the server directory handle of expression carry failure; Described file operation requests frame comprises server directory handle, operand, operation and parameter, wherein operation comprise file and catalogue newly-built, read, write, deletion, rename, attribute modification; Operating result and the data that frame comprises the successful operating result of expression operation, expression operation failure are replied in described file operation; Described unload request frame comprises the server directory handle that will unload; Described unloading is replied frame and is comprised the unload request result.
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| CN105245438B (en) * | 2015-10-10 | 2021-05-28 | 形山科技（深圳）有限公司 | Content sharing method, device and system |
| CN106534249A (en) * | 2016-09-21 | 2017-03-22 | 苏州市广播电视总台 | File transmission system based on file straight-through technology |
| CN107172061A (en) * | 2017-06-07 | 2017-09-15 | 郑州云海信息技术有限公司 | It is a kind of to realize shared method and system |
| CN109254724B (en) * | 2018-07-17 | 2022-03-08 | 中国航空无线电电子研究所 | Embedded virtual airborne storage system capable of configuring multiple partitions |
| CN110012448B (en) * | 2018-12-18 | 2021-10-26 | 中国银联股份有限公司 | Vehicle-side communication method based on lamplight |
| CN109933375B (en) * | 2019-01-25 | 2022-02-11 | 中国航空无线电电子研究所 | Remote starting method based on VxWorks653 and NFS over FC |
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