WO2016106907A1 - 一种基于分布式ftp的数据传输方法及系统 - Google Patents
一种基于分布式ftp的数据传输方法及系统 Download PDFInfo
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- 230000005540 biological transmission Effects 0.000 claims description 78
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- 238000013507 mapping Methods 0.000 claims description 11
- 238000012546 transfer Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 7
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/40—Support for services or applications
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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
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
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- the present invention relates to the field of data communication technologies, and in particular, to a data transmission method and system based on distributed FTP.
- FIG. 1 is a schematic diagram of a connection structure of a switch card and a memory card in a frame type device.
- the switch card and the memory card each have their own independent CPU, and the switch card is connected with each memory card, as shown in FIG.
- the switch card is connected to the memory card 1, the memory card 2, ..., the memory card n, and the memory card is equipped with an IP attributed to itself.
- the host computer only has the ability to access the switch card, and the IP of the memory card is hidden from the host computer.
- the frame device is implemented based on FTP.
- the upper computer accesses the memory card based on FTP, it includes:
- An FTP server is set up on the switch card, and the memory card is mapped to the network file system of the switch card.
- the data on the memory card is cached on the switch card, and the data is provided to the host computer through the switch card. All the data in the method has to pass through the CPU of the switch card, which causes the load pressure of the switch card to be large, which affects the efficiency of data transmission.
- distributed FTP is used to establish a Master FTP server on the switch card, a Slave FTP server is established on the memory card, and a control connection is established between the host computer and the switch card.
- the host computer sends a request to the switch card, and the request is a handshake request, where the information of the file is carried, and the host computer determines the memory card where the file is located according to the request, and sends the request to the corresponding memory card.
- the data connection is established by the corresponding memory card with the host computer.
- the handshake request sent by the upper computer carries the file information, which has certain requirements for the upper computer.
- the exchange card cannot know the storage where the file is located. The card causes the host computer to fail to obtain the corresponding data.
- the present invention has been made in order to provide an overcoming of the above problems or at least partially solving the above problems.
- the embodiment of the invention provides a data transmission method based on distributed FTP, and the method includes:
- the switching card allocates its own idle IP address to the request and notifies the upper computer according to the received request sent by the upper computer;
- the IP address that is idle for the request is allocated and the upper computer is notified to:
- the switch card selects an idle IP address in its own IP address segment
- connection request is forwarded to each memory card connected to itself, and establishing a virtual connection between the upper computer and each memory card further includes:
- the switch card sends a connection request to each memory card, where the connection request carries the idle IP address;
- the access may be performed according to the content of the file, and the determining the memory card where the file is located, and notifying the determined memory card to perform data transmission with the upper computer includes:
- the switch card searches for a memory card where the file information is located according to the file information and a mapping list saved by itself;
- the method further includes:
- the switch card marks the status of the IP address as an idle state.
- the embodiment of the invention provides a data transmission system based on distributed FTP, and the system includes:
- a host computer configured to send a request to the switch card, receive response information returned by the switch card, send a connection request and an operation request to the switch card, and perform data transmission with the memory card;
- a switching card configured to allocate a self-idle IP address to the request and notify the host computer according to the received request sent by the host computer, and forward the connection request to each memory card connected to itself, and establish a host computer With each store a virtual connection of the card; receiving an operation request sent by the upper computer, wherein the destination address of the operation request is the idle IP address; determining a memory card where the file is located according to the file information carried in the operation request Notifying the determined memory card to perform data transmission with the upper computer;
- the switch card is specifically configured to select an idle IP address in the IP address segment of the user, and return a response packet to the host computer, where the response packet carries the idle IP address. address.
- the switch card is specifically configured to send a connection request to each memory card, wherein the connection request carries the idle IP address; and receives a reply message returned by each of the memory cards, and establishes The virtual connection between the host computer and each memory card.
- the access may be performed according to the content of the file
- the switch card is specifically configured to search for the memory card where the file information is located according to the file information and the mapping list saved by itself. Sending an operation request to the found memory card, wherein the destination IP address of the operation request is the idle IP address.
- the switch card is specifically used to mark the status of the IP address as an idle state after the data transmission is completed.
- An embodiment of the present invention provides a data transmission method and system based on distributed FTP.
- the switch card After receiving a request sent by a host computer, the switch card allocates an idle IP address for the request, and sends a connection request when the host computer sends a connection request. Establishing a virtual connection between the upper computer and each memory card, and receiving an operation request sent by the upper computer to the idle IP address, determining the memory card where the file is located according to the information of the file carried in the operation request And notify the corresponding memory card and the host computer for data transmission.
- the switch card receives the request sent by the host computer, allocates the idle IP address to the request, and establishes a virtual connection between the host computer and the memory card, and when the operation request is received, the host computer and the corresponding The memory card performs data transmission, so that the host computer can obtain the corresponding file even if the storage address of the file cannot be known.
- FIG. 1 is a schematic diagram of a connection structure of a switch card and a memory card in a frame type device
- FIG. 3 is a detailed data transmission process based on distributed FTP according to an embodiment of the present invention.
- FIG. 4 is a schematic structural diagram of a connection between a switch card, a memory card, and a host computer according to an embodiment of the present invention
- FIG. 5 is a schematic structural diagram of a data transmission system based on distributed FTP according to an embodiment of the present invention.
- the embodiment of the present invention provides a data transmission method and system based on distributed FTP.
- FIG. 2 is a schematic diagram of a data transmission process based on distributed FTP according to an embodiment of the present invention, where the process includes the following steps:
- S201 The switch card allocates its own idle IP address to the request and notifies the upper computer according to the received request sent by the upper computer.
- the request is sent to the exchange card.
- the switch card selects an idle IP address in its own IP address segment.
- the switch card of the embodiment of the present invention stores its own IP address segment, and for convenience of operation, according to whether each IP address is used, the state of each IP address is locally saved, and the common state includes using State and idle state, the switch card can select an idle IP address in its own IP address segment according to the state of each IP address.
- S202 Receive a connection request sent by the upper computer, and forward the connection request to each memory card connected to itself, and establish a virtual connection between the upper computer and each memory card.
- the host computer After obtaining the IP address returned by the switch card, the host computer sends a connection request to the switch card to establish a connection with the IP address.
- the switch card itself may be connected to multiple memory cards.
- the switch card itself stores the IP address of each memory card. Therefore, when the switch card receives the connection request, the address in the connection request is converted, and the destination address is modified to The IP address of each memory card carries the free IP address in the converted connection request, and sends the connection request to each memory card, so that each memory card establishes a virtual connection with the host computer.
- S203 Receive an operation request sent by the upper computer, where a destination address of the operation request is the idle IP address.
- S204 Determine, according to information about the file carried in the operation request, a memory card where the file is located, and notify the determined memory card to perform data transmission with the upper computer.
- the host computer can obtain the information of the corresponding file.
- the storage address information of the file is saved in the exchange card for each file, specifically the storage link in which the file is saved, and the specific information is saved in the mapping list in the exchange card.
- the memory card storing the file can be determined, so that the memory card can be made The host computer performs data transmission.
- the request is sent to the exchange card.
- the switch card selects an idle IP address in its own IP address segment, that is, selects an IP address in an idle state, and then the switch card returns a response packet to the host computer, and the response packet carries the idle IP address. Address, so that the host computer can obtain the corresponding file from the IP address.
- the switch card converts the address in the request according to the request sent by the host computer, and sends the request to each memory card connected to itself. The address of each memory card is stored in the switch card. After the address translation, the request carries the free IP address, the source address is the address of the switch card, and the destination address is the address of each memory card. After receiving the request, each memory card is ready to make a data connection with the host computer.
- the host computer receives the request and sends a connection request to the switch card.
- the switch card converts the connection request, converts the source address of the connection request into its own address, and the destination address is the address of each memory card, and the switch card sends the converted connection request to each Memory cards.
- each memory card After receiving the connection request, each memory card returns a reply message to the exchange card. After receiving the reply message returned by each memory card, the switch card returns a reply message to the upper computer to establish each memory card and the upper computer. Virtual connection.
- the host computer After receiving the reply message returned by the switch card, the host computer sends an operation request to the switch card, where the operation request carries the information of the file to be accessed, and the destination address of the operation request is the idle IP address.
- the switch card searches for the memory card where the file is located according to the information of the file carried in the operation request and the mapping list saved by the operation request. After the corresponding memory card is found, the operation request is sent to the corresponding memory card to establish the storage.
- the connection between the card and the host computer realizes the data transmission between the memory card and the host computer. At this time, the address of the memory card is the free IP address for the upper computer.
- the switch card determines the memory card for data transmission with the host computer, at this time, since the other memory card also establishes a virtual connection with the host computer, the virtual connection does not need to perform data transmission, and the virtual connection needs to be disconnected.
- the exchange card when the virtual connection between the upper computer and the memory card is disconnected, the exchange card sends an instruction to disconnect the virtual connection to the other memory card, and notifies the memory card to disconnect the virtual connection from the upper computer; or, the storage The card did not receive an operation for the set length of time When requested, disconnect the virtual connection with the host computer.
- the notification information of the data transmission completion is sent to the exchange card, and the specific information may be that the upper computer sends the notification information of the data transmission completion to the exchange card, or the memory card transmits the data transmission to the exchange card.
- the switch card After receiving the notification information, the switch card reclaims the previously assigned IP address, marks the status of the IP address as idle, and clears the relevant configuration of the IP.
- FIG. 3 is a detailed data transmission process based on distributed FTP according to an embodiment of the present invention, where the process includes the following steps:
- S301 The host computer sends a request to the switch card, and after receiving the request, the switch card allocates an idle IP address for the request.
- the switch card returns a response packet to the host computer, where the response packet carries the idle IP address, and the switch card performs address translation on the request, and then sends the request to each memory card connected to itself.
- the host computer After receiving the response message, the host computer sends a connection request to the switch card, and the switch card performs address translation on the connection request, and forwards the connection request to each memory card connected to itself.
- each memory card After receiving the connection request, each memory card returns a reply message to the exchange card. After receiving the reply message returned by each memory card, the switch card returns a reply message to the upper computer to establish each memory card and The virtual connection of the host computer.
- S305 The upper computer sends an operation request to the switch card, where the operation request carries the information of the file to be accessed, and the destination address of the operation request is the idle IP address, and the switch card is based on the information of the file carried in the operation request. And the map list saved by itself, find the memory card where the file is located.
- S306 Transmit the operation request to the searched memory card, establish a connection between the memory card and the host computer, and implement data transmission between the memory card and the host computer.
- data may be transmitted based on the content of the file. Therefore, in the exchange card, the link address information of the file may be stored for each file, and after receiving the operation request sent by the host computer, according to the operation request and A list of saved maps to find the memory card where the file is stored.
- the data transmission performed by the memory card determined by the notification and the upper computer includes:
- each memory card is notified to perform data transmission with the upper computer.
- the sequence of determining the data transmission between the memory card and the upper computer may be specifically determined based on a method of load balancing, including:
- the address transfer machine TCP transfer technology is used to implement data transmission between the upper computer and the memory card, thereby implementing file-based content access, and the sub-directory under the root directory of the mapping list of the exchange card is defined according to the content.
- the logical subdirectory, the files in each subdirectory are of the same type, and the specific location of the file is saved in the mapping list, and the list is managed and maintained by the exchange card. Therefore, when the host computer requests a certain file, it can support accessing files on multiple memory cards, as long as the virtual connection of data transmission is provided every time the file on one memory card is accessed.
- the embodiment of the present invention can support accessing multiple memory cards, a load balancing policy can be adopted, and the order of the memory cards is determined according to the remaining amount of the storage space, and the memory card with more storage space is operated first. Helps increase the speed and efficiency of data transmission.
- a plurality of virtual upper computers may be disposed in the exchange card, and each virtual upper computer is connected with an address conversion module, such as the exchange card shown in FIG. A schematic diagram of the connection structure between the memory card and the host computer.
- Each address conversion module is connected to the memory card, and an ftp client is installed in the upper computer.
- the master virtual host computer is elected among the plurality of virtual upper computers, and the other virtual upper computer is the slave virtual upper computer.
- Master Ftp, or Slave Ftp is installed on each memory card.
- the master virtual switch in the switch card receives the request, opens the data connection listening port, allocates its own idle IP address to the request, and returns a response message to the host computer, wherein The response message carries the idle IP address, so that the host computer sends an operation request to the idle IP address.
- the master virtual switch translates the request by the address translation module, and carries the idle IP address in the request, and sends the converted request to each memory card to notify each memory card to perform with the ftp client. Preparation for data transmission.
- the switch card and the host computer are located in the same network segment (the second layer network)
- the data transmission process also needs to use the reserved Mac, and the switch card selects an idle one in its own Mac address. Mac.
- the idle Mac is used to change the forwarding entry in the switch card when the data connection is switched, but does not need to change the arp entry in the upper computer.
- the ftp client in the host computer After receiving the response message returned by the switch card, the ftp client in the host computer sends a connection request for the tcp connection to the switch card.
- the connection request is a handshake message
- the destination address of the connection request is the address of the switch card.
- the master virtual upper computer of the switch card receives the connection request, and the address conversion module connected by the master virtual upper computer converts the connection request, and sends the converted connection request to each memory card.
- each memory card After receiving the connection request, each memory card returns a reply message to the switch card, and the source address of the reply message is the free IP address.
- the exchange card does not send the reply message returned by each memory card to the upper computer, but returns a reply message to the upper computer, thereby establishing a virtual connection between each memory card and the upper computer.
- the master virtual host computer module in the switch card is responsible for maintaining the tcp connection status of this article. Including some parameters of tcp and the state of the tcp connection in all virtual upper computers.
- the host computer After receiving the reply message of the switch card, the host computer sends an operation request to the switch card, where the operation request carries the information of the file to be accessed, and the destination address of the operation request is the idle IP address, and the master in the exchange card
- the virtual switch searches for the memory card where the file is located according to the information of the file carried in the operation request and the mapping list saved by the virtual switch. According to the found memory card, after the operation request is converted by the address conversion module, the operation request is sent to the found memory card, and the connection between the memory card and the host computer is established, thereby realizing data transmission between the memory card and the host computer.
- the master virtual switch sends a command to close the virtual connection to other memory cards, and commands other memory cards to close the virtual connection with the upper computer.
- the master virtual host computer modifies the entries in the switch card, and forwards the data of the tcp connection from the host computer to the memory card providing the service.
- the notification information of the data transmission completion is sent to the switch card, and after receiving the notification information, the master virtual switch reclaims the previously assigned IP address, and marks the status of the IP address as idle, and Clear the related configuration of the IP.
- the upper computer when the user needs to download a file through the upper computer, the upper computer will establish a virtual connection with each memory card, and only one of the virtual data links is a data link for real data transmission with the upper computer. Road, the specific virtual connection and the host computer for data transmission, is determined by the switch card.
- FIG. 5 is a schematic structural diagram of a data transmission system based on distributed FTP according to an embodiment of the present disclosure, where the system includes:
- the upper computer 51 is configured to send a request to the switch card, receive response information returned by the switch card, send a connection request and an operation request to the switch card, and perform data transmission with the memory card;
- the exchange card 52 is configured to allocate the idle IP address to the request according to the received request sent by the upper computer, notify the upper computer, and forward the connection request to each memory card connected to itself, and establish a higher position. And a virtual connection of each of the memory cards; receiving an operation request sent by the upper computer, wherein the destination address of the operation request is the idle IP address; and determining, according to the file information carried in the operation request, a memory card where the file is located, notifying the determined memory card to perform data transmission with the upper computer;
- a plurality of memory cards 53 are configured for data transmission with the switch card.
- the switch card 52 is specifically configured to select an idle IP address in the IP address segment of the user, and return a response packet to the host computer, where the response packet carries the idle IP address.
- the switch card 52 is specifically configured to send a connection request to each memory card, where the connection request carries the idle IP address, and receives a reply message returned by each of the memory cards, and establishes a host computer and each The virtual connection of the memory card.
- the switch card 52 is specifically configured to search for the file according to the file information and a mapping list saved by itself. a memory card where the information is located; sending an operation request to the found memory card, wherein the destination IP address of the operation request is the idle IP address.
- the switch card 52 is specifically configured to determine a sequence of data transmission between the memory card and the upper computer; and notify each memory card to perform data transmission with the upper computer according to the determined sequence.
- the switch card 52 is specifically configured to determine a sequence of data transmission between the memory card and the upper computer according to the remaining storage space of the memory card.
- the switch card 52 is specifically configured to mark the status of the IP address as an idle state after the data transmission is completed, and notify the determined memory card to disconnect the connection with the upper computer.
- An embodiment of the present invention provides a data transmission method and system based on distributed FTP.
- the switch card After receiving a request sent by a host computer, the switch card allocates an idle IP address for the request, and sends a connection request when the host computer sends a connection request. Establishing a virtual connection between the upper computer and each memory card, and receiving an operation request sent by the upper computer to the idle IP address, determining the memory card where the file is located according to the information of the file carried in the operation request And notify the corresponding memory card and the host computer for data transmission.
- the switch card receives the request sent by the host computer, allocates the idle IP address to the request, and establishes a virtual connection between the host computer and the memory card, and when the operation request is received, the host computer and the corresponding The memory card performs data transmission, so that the host computer can obtain the corresponding file even if the storage address of the file cannot be known.
- modules in the devices of the embodiments can be adaptively changed and placed in one or more devices different from the embodiment.
- the modules or units or components of the embodiments may be combined into one module or unit or component, and further they may be divided into a plurality of sub-modules or sub-units or sub-components.
- any combination of the features disclosed in the specification, including the accompanying claims, the abstract and the drawings, and any methods so disclosed, or All processes or units of the device are combined.
- Each feature disclosed in this specification (including the accompanying claims, the abstract and the drawings) may be replaced by alternative features that provide the same, equivalent or similar purpose.
- the various component embodiments of the present invention may be implemented in hardware, or in a software module running on one or more processors, or in a combination thereof.
- a microprocessor or digital signal processor may be used in practice to implement some or all of some or all of the components of a distributed FTP based data transmission system in accordance with an embodiment of the present invention.
- the invention can also be implemented as a device or device program (e.g., a computer program and a computer program product) for performing some or all of the methods described herein.
- a program implementing the invention may be stored on a computer readable medium or may be in the form of one or more signals. Such signals may be downloaded from an Internet website, provided on a carrier signal, or provided in any other form.
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Abstract
一种基于分布式FTP的数据传输方法及系统，用以实现上位机基于内容访问存储卡，该方法中交换卡接收到上位机发送的请求后，为该请求分配空闲的IP地址，并在上位机发送连接请求时，建立上位机与每个存储卡的虚连接，接收到上位机发送的目的地址为该空闲的IP地址的操作请求后，根据该操作请求中携带的文件的信息，确定该文件所在的存储卡，并通知相应的存储卡与上位机进行数据传输。由于在本发明实施例中交换卡接收到上位机发送的请求，为该请求分配自身空闲的IP地址，使上位机与存储卡建立虚连接，并在接收到操作请求时，使上位机与相应的存储卡进行数据传输，从而使上位机即使无法获知文件的存储地址，也能获取相应的文件。
Description
本申请要求在2014年12月31日提交中国专利局、申请号为201410855882.X、发明名称为“一种基于分布式FTP的数据传输方法及系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
本发明涉及数据通信技术领域，尤其涉及一种基于分布式FTP的数据传输方法及系统。
图1为框架式设备内交换卡和存储卡的连接结构示意图，在框架式设备中交换卡和存储卡都有自身独立的CPU，并且交换卡与每个存储卡连接，如图1所示，交换卡分别连接存储卡1、存储卡2、……、存储卡n，存储卡都配有归属于自身的IP，上位机只有访问交换卡的能力，存储卡的IP对上位机隐藏。为了实现上位机对存储卡的访问，框架式设备都基于FTP实现。
基于FTP实现上位机对存储卡的访问时包括：
在交换卡上建立FTP服务器，将存储卡映射为交换卡的网络文件系统，存储卡上的数据缓存在交换卡上，通过交换卡向上位机提供数据。该方法中所有的数据都要经过交换卡的CPU，导致交换卡的负载压力较大，影响数据传输的效率。
或者，采用分布式FTP的方式，在交换卡上建立Master FTP服务器，在存储卡上建立Slave FTP服务器，上位机与交换卡之间建立控制连接。当需要进行数据传输时，上位机向交换卡发送请求，该请求为握手请求，其中携带文件的信息，上位机根据该请求，确定该文件所在的存储卡，将该请求发送到对应的存储卡，由相应的存储卡与上位机建立数据连接。该过程中上位机发送的握手请求中携带文件的信息，这对上位机具有一定的要求，当上位机不具有发送握手请求携带文件的信息的能力时，交换卡将无法获知该文件所在的存储卡，导致上位机无法获取相应的数据。
发明内容
鉴于上述问题，提出了本发明以便提供一种克服上述问题或者至少部分地解决上述问
题的一种基于分布式FTP的数据传输方法及系统。
本发明实施例提供了一种基于分布式FTP的数据传输方法，所述方法包括：
交换卡根据接收到的上位机发送的请求，为所述请求分配自身空闲的IP地址并通知上位机；
接收所述上位机发送的连接请求，并将所述连接请求转发到与自身连接的每个存储卡，建立上位机与每个存储卡的虚连接；
接收所述上位机发送的操作请求，其中所述操作请求的目的地址为所述空闲的IP地址；
根据所述操作请求中携带的文件信息，确定所述文件所在的存储卡，通知确定的所述存储卡与所述上位机进行数据传输。
为了保证数据的传输，在本发明实施例中所述为所述请求分配自身空闲的IP地址并通知上位机包括：
所述交换卡在自身的IP地址段中选择空闲的IP地址；
向所述上位机返回响应报文，其中所述响应报文中携带所述空闲的IP地址。
为了保证数据的传输，在本发明实施例中所述将所述连接请求转发到与自身连接的每个存储卡，建立上位机与每个存储卡的虚连接还包括：
所述交换卡向每个存储卡发送连接请求，其中所述连接请求携带所述空闲的IP地址；
接收每个所述存储卡返回的回复报文，建立上位机与每个存储卡的虚连接。
为了提高数据传输的效率，在本发明实施例中可以按照文件的内容进行访问，所述确定所述文件所在的存储卡，通知确定的所述存储卡与所述上位机进行数据传输包括：
所述交换卡根据所述文件信息，及自身保存的映射列表，查找该文件信息所在的存储卡；
向查找到的所述存储卡发送操作请求，其中所述操作请求的目的IP地址为所述空闲的IP地址。
为了保证后续数据的传输，数据传输完成后，所述方法还包括：
所述交换卡将所述IP地址的状态标记为空闲状态。
本发明实施例提供了一种基于分布式FTP的数据传输系统，所述系统包括：
上位机，用于向交换卡发送请求，接收所述交换卡返回的响应信息；向交换卡发送连接请求及操作请求，与存储卡进行数据传输；
交换卡，用于根据接收到的上位机发送的请求，为所述请求分配自身空闲的IP地址并通知上位机，并将所述连接请求转发到与自身连接的每个存储卡，建立上位机与每个存储
卡的虚连接；接收所述上位机发送的操作请求，其中所述操作请求的目的地址为所述空闲的IP地址；根据所述操作请求中携带的文件信息，确定所述文件所在的存储卡，通知确定的所述存储卡与所述上位机进行数据传输；
多个存储卡，用于与所述交换卡进行数据传输。
为了保证数据的传输，所述交换卡，具体用于在自身的IP地址段中选择空闲的IP地址；向所述上位机返回响应报文，其中所述响应报文中携带所述空闲的IP地址。
为了保证数据的传输，所述交换卡，具体用于向每个存储卡发送连接请求，其中所述连接请求携带所述空闲的IP地址；接收每个所述存储卡返回的回复报文，建立上位机与每个存储卡的虚连接。
为了提高数据传输的效率，在本发明实施例中可以按照文件的内容进行访问，所述交换卡，具体用于根据所述文件信息，及自身保存的映射列表，查找该文件信息所在的存储卡；向查找到的所述存储卡发送操作请求，其中所述操作请求的目的IP地址为所述空闲的IP地址。
为了保证后续数据的传输，所述交换卡，具体用于数据传输完成后，将所述IP地址的状态标记为空闲状态。
本发明实施例提供了一种基于分布式FTP的数据传输方法及系统，该方法中交换卡接收到上位机发送的请求后，为该请求分配空闲的IP地址，并在上位机发送连接请求时，建立上位机与每个存储卡的虚连接，接收到上位机发送的目的地址为该空闲的IP地址的操作请求后，根据该操作请求中携带的文件的信息，确定该文件所在的存储卡，并通知相应的存储卡与上位机进行数据传输。由于在本发明实施例中交换卡接收到上位机发送的请求，为该请求分配自身空闲的IP地址，使上位机与存储卡建立虚连接，并在接收到操作请求时，使上位机与相应的存储卡进行数据传输，从而使上位机即使无法获知文件的存储地址，也能获取相应的文件。
上述说明仅是本发明技术方案的概述，为了能够更清楚了解本发明的技术手段，而可依照说明书的内容予以实施，并且为了让本发明的上述和其它目的、特征和优点能够更明显易懂，以下特举本发明的具体实施方式。
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本发明的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1为框架式设备内交换卡和存储卡的连接结构示意图；
图2为本发明实施例提供的一种基于分布式FTP的数据传输过程；
图3为本发明实施例提供的一种基于分布式FTP的详细数据传输过程；
图4为本发明实施例提供的交换卡、存储卡与上位机的连接结构示意图；
图5为本发明实施例提供的一种基于分布式FTP的数据传输系统结构示意图。
为了使上位机能够准确的获存储卡中的文件内容，本发明实施例提供了一种基于分布式FTP的数据传输方法及系统。
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。
下面结合说明附图，对本发明实施例进行说明。
图2为本发明实施例提供的一种基于分布式FTP的数据传输过程，该过程包括以下步骤：
S201：交换卡根据接收到的上位机发送的请求，为所述请求分配自身空闲的IP地址并通知上位机。
当上位机需要获取文件内容时，向交换卡发送请求。交换卡接收到上位机发送的请求后，在自身的IP地址段中选择空闲的IP地址。
具体的，在本发明实施例的交换卡中保存有自身的IP地址段，并且为了方便操作，根据每个IP地址是否被使用，在本地保存有每个IP地址的状态，常见的状态包括使用状态和空闲状态，交换卡根据每个IP地址的状态可以在自身的IP地址段中选择出空闲的IP地址。
S202：接收所述上位机发送的连接请求，并将所述连接请求转发到与自身连接的每个存储卡，建立上位机与每个存储卡的虚连接。
上位机获取了交换卡返回的IP地址后，向交换卡发送连接请求，请求与该IP地址建立连接。交换卡本身可能连接有多个存储卡，交换卡本身保存有每个存储卡的IP地址，因此当交换卡接收到该连接请求后，将该连接请求中的地址进行转换，将目的地址修改为每个存储卡的IP地址，在转换后的该连接请求中携带该空闲的IP地址，并将该连接请求发送到每个存储卡，使每个存储卡与上位机建立虚连接。
S203：接收所述上位机发送的操作请求，其中所述操作请求的目的地址为所述空闲的IP地址。
S204：根据所述操作请求中携带的文件的信息，确定所述文件所在的存储卡，通知确定的所述存储卡与所述上位机进行数据传输。
当建立虚连接后，上位机就可以获取相应的文件的信息了。在交换卡中针对每个文件保存有该文件的存储地址信息，具体的为保存有该文件的存储链接，该具体的信息保存在交换卡中的映射列表中。当接收到上位机发送的操作请求后，根据该操作请求中的文件的信息，及映射列表中每个文件的存储位置信息，即可确定存储该文件的存储卡，从而可以使该存储卡与上位机进行数据传输。
具体的，在本发明实施例中当上位机需要获取某一文件的信息时，向交换卡发送请求。交换卡接收到该请求后，在自身的IP地址段中选择空闲的IP地址，即选择空闲状态的IP地址，之后交换卡向上位机返回响应报文，该响应报文中携带该空闲的IP地址，以便使上位机从该IP地址获取相应的文件。并且，交换卡根据该上位机发送的请求，对该请求中的地址进行转换，将该请求发送到与自身连接的每个存储卡。在交换卡中保存有每个存储卡的地址，在进行地址转换后，该请求中携带该空闲的IP地址，源地址为该交换卡的地址，目的地址为每个存储卡的地址。每个存储卡接收到该请求后，做好与上位机进行数据连接的准备。
上位机接收该请求，并向交换卡发送连接请求。交换卡接收到该连接请求后，对该连接请求进行转换，将该连接请求的源地址转换为自身的地址，目的地址为每个存储卡的地址，交换卡将转换后的连接请求发送到每个存储卡。
每个存储卡接收到该连接请求后，向交换卡返回回复报文，交换卡接收到每个存储卡返回的回复报文后，向上位机返回回复报文，建立每个存储卡与上位机的虚连接。
上位机接收到交换卡返回的回复报文后，向交换卡发送操作请求，该操作请求中携带待访问的文件的信息，且该操作请求的目的地址为该空闲的IP地址。交换卡根据该操作请求中携带的文件的信息，及自身保存的映射列表，查找该文件所在的存储卡，当查找到相应的存储卡后，将该操作请求发送到对应的存储卡从而建立存储卡与上位机的连接，实现存储卡与上位机的数据传输，此时对于上位机而言该存储卡的地址为该空闲的IP地址。
交换卡确定了与上位机进行数据传输的存储卡后，此时由于其他存储卡还与上位机之间建立有虚连接，该虚连接后续无需进行数据传输，需要将该虚连接断开。在本发明实施例中在断开上位机与存储卡间的虚连接时，交换卡向其他存储卡发送断开虚连接的指令，通知存储卡与上位机断开虚连接；或，所述存储卡在设定的时间长度内未接收到操作
请求时，断开与所述上位机的虚连接。
当存储卡与上位机完成数据传输后，向交换卡发送数据传输完成的通知信息，具体的可以是上位机向交换卡发送数据传输完成的通知信息，也可以是存储卡向交换卡发送数据传输完成的通知信息。交换卡接收到该通知信息后，收回之前分配的IP地址，将所述IP地址的状态标记为空闲状态，并清除该IP的相关配置。
图3为本发明实施例提供的一种基于分布式FTP的详细数据传输过程，该过程包括以下步骤：
S301：上位机向交换卡发送请求，交换卡接收到该请求后，为该请求分配自身空闲的IP地址。
S302：交换卡向上位机返回响应报文，该响应报文中携带该空闲的IP地址，并且交换卡将该请求进行地址转换后，发送给与自身连接的每个存储卡。
S303：上位机接收到该响应报文后，向交换卡发送连接请求，交换卡对该连接请求进行地址转换，并将所述连接请求转发到与自身连接的每个存储卡。
S304：每个存储卡接收到该连接请求后，向交换卡返回回复报文，交换卡接收到每个存储卡返回的回复报文后，向上位机返回回复报文，建立每个存储卡与上位机的虚连接。
S305：上位机向交换卡发送操作请求，该操作请求中携带待访问的文件的信息，且该操作请求的目的地址为该空闲的IP地址，交换卡根据该操作请求中携带的文件的信息，及自身保存的映射列表，查找该文件所在的存储卡。
S306：将该操作请求进行转换发送给该查找到的存储卡，建立存储卡与上位机的连接，实现存储卡与上位机的数据传输。
S307：存储卡与上位机完成数据传输后，向交换卡发送数据传输完成的通知信息，交换卡接收到该通知信息后，收回之前分配的IP地址，将所述IP地址的状态标记为空闲状态，并清除该IP的相关配置。
在本发明实施例中可以基于文件的内容进行数据的传输，因此在交换卡中可以针对每个文件存储该文件的链接地址信息，当接收到上位机发送的操作请求后，根据该操作请求及保存的映射列表，查找存储该文件的存储卡。当查找到的存储卡包括至少两个时，该通知确定的所述存储卡与所述上位机进行数据传输包括：
确定所述存储卡与所述上位机进行数据传输的顺序；
按照确定的顺序，通知每个存储卡与所述上位机进行数据传输。
在确定存储卡的顺序时，可以基于负载均衡的方法，具体的确定所述存储卡与所述上位机进行数据传输的顺序包括：
根据存储卡的剩余存储空间，确定所述存储卡与所述上位机进行数据传输的顺序。
本发明实施例中利用地址转换机TCP转移技术实现上位机与存储卡之间的数据传输，从而实现基于文件内容的访问，在交换卡的映射列表的根目录下的子目录是根据内容定义的逻辑子目录，每个子目录内的文件是同一类型的，在该映射列表中保存有该文件的具体位置，该列表由交换卡管理和维护。因此当上位机请求某一文件时，可以支持访问多个存储卡上的文件，只要在每访问一个存储卡上的该文件时，提供数据传输的虚连接即可。另外，本发明实施例由于可以支持访问多个存储卡，因此可以采用负载均衡的策略，按照存储空间剩余的多少来确定存储卡的顺序，先对存储空间剩余较多的存储卡进行操作，从而有利于提高数据传输的速率和效率。
另外，在本发明实施例中为了基于内容向上位机提供文件，在交换卡中可以设置有多个虚拟上位机，每个虚拟上位机连接有地址转换模块，如图4所示的交换卡、存储卡与上位机的连接结构示意图，每个地址转换模块与存储卡连接，上位机中安装有ftp客户端。在具体使用时，在多个虚拟上位机中选举出master虚拟上位机，其他的虚拟上位机为slave虚拟上位机。每个存储卡上安装有Master Ftp，或Slave Ftp。
当上位机向交换卡发送请求时，交换卡中的master虚拟交换机接收到该请求，会打开数据连接监听端口，并为该请求分配自身空闲的IP地址，并向上位机返回响应报文，其中该响应报文中携带该空闲的IP地址，以便上位机向该空闲的IP地址发送操作请求。同时master虚拟交换机将该请求经地址转换模块进行转换，并在该请求中携带该空闲的IP地址，将转换后的请求发送到每个存储卡，通知每个存储卡做好与ftp客户端进行数据传输的准备。
另外，在本发明实施例中当交换卡与上位机位于同一网段(二层网络)时，该数据传输的过程还需要用保留Mac，此时交换卡在自身的Mac地址中选择一个空闲的Mac。该空闲的Mac用于在数据连接切换时，改变交换卡中的转发表项，但并不需要改变上位机中的arp表项。
上位机中的ftp客户端接收到交换卡返回的响应报文后，向交换卡发送tcp连接的连接请求，该连接请求为握手报文，该连接请求的目的地址为交换卡的地址。交换卡的master虚拟上位机接收到该连接请求，由该master虚拟上位机连接的地址转换模块对该连接请求进行转换，将转换后的连接请求发送到每个存储卡。每个存储卡接收到该连接请求后，向交换卡返回回复报文，该回复报文的源地址为该空闲的IP地址。此时交换卡并不将每个存储卡返回的回复报文发送给上位机，而是自身向上位机返回回复报文，从而建立每个存储卡与上位机的虚连接。交换卡中的master虚拟上位机模块负责维护本条tcp连接状态，包
括tcp的一些参数和所有的虚拟上位机中该tcp连接的状态。
上位机接收到交换卡的回复报文后，向交换卡发送操作请求，该操作请求中携带待访问的文件的信息，且该操作请求的目的地址为该空闲的IP地址，交换卡中的master虚拟交换机根据该操作请求中携带的文件的信息，及自身保存的映射列表，查找该文件所在的存储卡。根据查找到的存储卡，将该操作请求通过地址转换模块转换后，将该操作请求发送到查找到的存储卡，建立存储卡与上位机的连接，实现存储卡与上位机的数据传输。并且master虚拟交换机向其他存储卡发送关闭本次虚连接的命令，命令其他存储卡关闭与该上位机的虚连接。
另外，master虚拟上位机修改交换卡中的表项，使来自上位机的该tcp连接的数据转发到提供服务的存储卡上。
存储卡与上位机完成数据传输后，向交换卡发送数据传输完成的通知信息，master虚拟交换机接收到该通知信息后，收回之前分配的IP地址，将该IP地址的状态标记为空闲状态，并清除该IP的相关配置。
在本发明实施例中当用户需要通过上位机下载文件时，上位机将会与每个存储卡建立虚连接，这些虚拟的数据链路中只有一条是真是的与上位机进行数据传输的数据链路，具体由哪条虚连接与上位机进行数据传输，是由交换卡决定的。
图5为本发明实施例提供的一种基于分布式FTP的数据传输系统结构示意图，所述系统包括：
上位机51，用于向交换卡发送请求，接收所述交换卡返回的响应信息；向交换卡发送连接请求及操作请求，与存储卡进行数据传输；
交换卡52，用于根据接收到的上位机发送的请求，为所述请求分配自身空闲的IP地址并通知上位机，并将所述连接请求转发到与自身连接的每个存储卡，建立上位机与每个存储卡的虚连接；接收所述上位机发送的操作请求，其中所述操作请求的目的地址为所述空闲的IP地址；根据所述操作请求中携带的文件信息，确定所述文件所在的存储卡，通知确定的所述存储卡与所述上位机进行数据传输；
多个存储卡53，用于与所述交换卡进行数据传输。
所述交换卡52，具体用于在自身的IP地址段中选择空闲的IP地址；向所述上位机返回响应报文，其中所述响应报文中携带所述空闲的IP地址。
所述交换卡52，具体用于向每个存储卡发送连接请求，其中所述连接请求携带所述空闲的IP地址；接收每个所述存储卡返回的回复报文，建立上位机与每个存储卡的虚连接。
所述交换卡52，具体用于根据所述文件信息，及自身保存的映射列表，查找该文件
信息所在的存储卡；向查找到的所述存储卡发送操作请求，其中所述操作请求的目的IP地址为所述空闲的IP地址。
所述交换卡52，具体用于确定所述存储卡与所述上位机进行数据传输的顺序；按照确定的顺序，通知每个存储卡与所述上位机进行数据传输。
所述交换卡52，具体用于根据存储卡的剩余存储空间，确定所述存储卡与所述上位机进行数据传输的顺序。
所述交换卡52，具体用于数据传输完成后，将所述IP地址的状态标记为空闲状态，并通知确定的所述存储卡断开与所述上位机的连接。
本发明实施例提供了一种基于分布式FTP的数据传输方法及系统，该方法中交换卡接收到上位机发送的请求后，为该请求分配空闲的IP地址，并在上位机发送连接请求时，建立上位机与每个存储卡的虚连接，接收到上位机发送的目的地址为该空闲的IP地址的操作请求后，根据该操作请求中携带的文件的信息，确定该文件所在的存储卡，并通知相应的存储卡与上位机进行数据传输。由于在本发明实施例中交换卡接收到上位机发送的请求，为该请求分配自身空闲的IP地址，使上位机与存储卡建立虚连接，并在接收到操作请求时，使上位机与相应的存储卡进行数据传输，从而使上位机即使无法获知文件的存储地址，也能获取相应的文件。
在此提供的算法和显示不与任何特定计算机、虚拟系统或者其它设备固有相关。各种通用系统也可以与基于在此的示教一起使用。根据上面的描述，构造这类系统所要求的结构是显而易见的。此外，本发明也不针对任何特定编程语言。应当明白，可以利用各种编程语言实现在此描述的本发明的内容，并且上面对特定语言所做的描述是为了披露本发明的最佳实施方式。
在此处所提供的说明书中，说明了大量具体细节。然而，能够理解，本发明的实施例可以在没有这些具体细节的情况下实践。在一些实例中，并未详细示出公知的方法、结构和技术，以便不模糊对本说明书的理解。
类似地，应当理解，为了精简本公开并帮助理解各个发明方面中的一个或多个，在上面对本发明的示例性实施例的描述中，本发明的各个特征有时被一起分组到单个实施例、图、或者对其的描述中。然而，并不应将该公开的方法解释成反映如下意图：即所要求保护的本发明要求比在每个权利要求中所明确记载的特征更多的特征。更确切地说，如下面的权利要求书所反映的那样，发明方面在于少于前面公开的单个实施例的所有特征。因此，遵循具体实施方式的权利要求书由此明确地并入该具体实施方式，其中每个权利要求本身都作为本发明的单独实施例。
本领域那些技术人员可以理解，可以对实施例中的设备中的模块进行自适应性地改变并且把它们设置在与该实施例不同的一个或多个设备中。可以把实施例中的模块或单元或组件组合成一个模块或单元或组件，以及此外可以把它们分成多个子模块或子单元或子组件。除了这样的特征和/或过程或者单元中的至少一些是相互排斥之外，可以采用任何组合对本说明书(包括伴随的权利要求、摘要和附图)中公开的所有特征以及如此公开的任何方法或者设备的所有过程或单元进行组合。除非另外明确陈述，本说明书(包括伴随的权利要求、摘要和附图)中公开的每个特征可以由提供相同、等同或相似目的的替代特征来代替。
此外，本领域的技术人员能够理解，尽管在此所述的一些实施例包括其它实施例中所包括的某些特征而不是其它特征，但是不同实施例的特征的组合意味着处于本发明的范围之内并且形成不同的实施例。例如，在下面的权利要求书中，所要求保护的实施例的任意之一都可以以任意的组合方式来使用。
本发明的各个部件实施例可以以硬件实现，或者以在一个或者多个处理器上运行的软件模块实现，或者以它们的组合实现。本领域的技术人员应当理解，可以在实践中使用微处理器或者数字信号处理器(DSP)来实现根据本发明实施例的基于分布式FTP的数据传输系统中的一些或者全部部件的一些或者全部功能。本发明还可以实现为用于执行这里所描述的方法的一部分或者全部的设备或者装置程序(例如，计算机程序和计算机程序产品)。这样的实现本发明的程序可以存储在计算机可读介质上，或者可以具有一个或者多个信号的形式。这样的信号可以从因特网网站上下载得到，或者在载体信号上提供，或者以任何其他形式提供。
应该注意的是上述实施例对本发明进行说明而不是对本发明进行限制，并且本领域技术人员在不脱离所附权利要求的范围的情况下可设计出替换实施例。在权利要求中，不应将位于括号之间的任何参考符号构造成对权利要求的限制。单词“包含”不排除存在未列在权利要求中的元件或步骤。位于元件之前的单词“一”或“一个”不排除存在多个这样的元件。本发明可以借助于包括有若干不同元件的硬件以及借助于适当编程的计算机来实现。在列举了若干装置的单元权利要求中，这些装置中的若干个可以是通过同一个硬件项来具体体现。单词第一、第二、以及第三等的使用不表示任何顺序。可将这些单词解释为名称。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。
Claims (10)
- 一种基于分布式FTP的数据传输方法，其特征在于，该方法包括：交换卡根据接收到的上位机发送的请求，为所述请求分配自身空闲的IP地址并通知上位机；接收所述上位机发送的连接请求，并将所述连接请求转发到与自身连接的每个存储卡，建立上位机与每个存储卡的虚连接；接收所述上位机发送的操作请求，其中所述操作请求的目的地址为所述空闲的IP地址；根据所述操作请求中携带的文件的信息，确定所述文件所在的存储卡，通知确定的所述存储卡与所述上位机进行数据传输。
- 如权利要求1所述的方法，其特征在于，所述为所述请求分配自身空闲的IP地址并通知上位机包括：所述交换卡在自身的IP地址段中选择空闲的IP地址；向所述上位机返回响应报文，其中所述响应报文中携带所述空闲的IP地址。
- 如权利要求1所述的方法，其特征在于，所述将所述连接请求转发到与自身连接的每个存储卡，建立上位机与每个存储卡的虚连接还包括：所述交换卡向每个存储卡发送连接请求，其中所述连接请求携带所述空闲的IP地址；接收每个所述存储卡返回的回复报文，建立上位机与每个存储卡的虚连接。
- 如权利要求1所述的方法，其特征在于，所述确定所述文件所在的存储卡，通知确定的所述存储卡与所述上位机进行数据传输包括：所述交换卡根据所述文件的信息，及自身保存的映射列表，查找该文件所在的存储卡；向查找到的所述存储卡发送操作请求，其中所述操作请求的目的IP地址为所述空闲的IP地址。
- 如权利要求1所述的方法，其特征在于，数据传输完成后，所述方法还包括：所述交换卡将所述IP地址的状态标记为空闲状态。
- 一种基于分布式FTP的数据传输系统，其特征在于，所述系统包括：上位机，用于向交换卡发送请求，接收所述交换卡返回的响应信息；向交换卡发送连接请求及操作请求，与存储卡进行数据传输；交换卡，用于根据接收到的上位机发送的请求，为所述请求分配自身空闲的IP地址 并通知上位机，并将所述连接请求转发到与自身连接的每个存储卡，建立上位机与每个存储卡的虚连接；接收所述上位机发送的操作请求，其中所述操作请求的目的地址为所述空闲的IP地址；根据所述操作请求中携带的文件信息，确定所述文件所在的存储卡，通知确定的所述存储卡与所述上位机进行数据传输；多个存储卡，用于与所述交换卡进行数据传输。
- 如权利要求6所述的系统，其特征在于，所述交换卡，具体用于在自身的IP地址段中选择空闲的IP地址；向所述上位机返回响应报文，其中所述响应报文中携带所述空闲的IP地址。
- 如权利要求6所述的系统，其特征在于，所述交换卡，具体用于向每个存储卡发送连接请求，其中所述连接请求携带所述空闲的IP地址；接收每个所述存储卡返回的回复报文，建立上位机与每个存储卡的虚连接。
- 如权利要求6所述的系统，其特征在于，所述交换卡，具体用于根据所述文件信息，及自身保存的映射列表，查找该文件信息所在的存储卡；向查找到的所述存储卡发送操作请求，其中所述操作请求的目的IP地址为所述空闲的IP地址。
- 如权利要求6所述的系统，其特征在于，所述交换卡，具体用于数据传输完成后，将所述IP地址的状态标记为空闲状态。
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| CN106790348A (zh) * | 2016-11-11 | 2017-05-31 | 北京百卓网络技术有限公司 | 分布式系统的文件上传及下载方法与系统 |
| CN111866178A (zh) * | 2020-08-04 | 2020-10-30 | 蝉鸣科技(西安)有限公司 | 一种分布式ftp/ftps文件传输方法、装置及计算机存储介质 |
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