JP4705795B2 - Data sharing program, computer for data sharing system, and data sharing method - Google Patents

Description

  The present invention relates to a data sharing program, a data sharing system, and a data sharing method capable of sharing data such as files and folders between computer terminals connected to a peer-to-peer network.

  As a LAN constructed at a business office or the like, a client server type network has been widely used. In the case of a client server system, a computer connected to a network is divided into roles by a client and a server. Computers connected to a network in such a system are divided into clients that issue various requests and job requests in accordance with user operation inputs, and servers that quickly respond to request requests from clients. In many cases, a personal computer connected to a network serves as a client, and an expensive and high-performance dedicated server equipped with a mass storage device and a high-performance CPU serves as a server. On the other hand, recently, a peer-to-peer (P2P) network in which a computer connected to a network is not divided into a client and a server is used due to an improvement in CPU performance of a personal computer connected to the network and an increase in disk capacity.

  In a peer-to-peer network, all computers function as clients and also as servers. Since a dedicated server machine is not required and the cost is low, it is suitable for sharing files and printers over a small LAN.

In such a peer-to-peer network, when sharing a file, the file to be shared is used in synchronization. For example, when a file stored in a specific folder (directory) of one computer terminal connected to a peer-to-peer network is used in synchronization with another computer, the specific folder of the one computer terminal is used as another By performing synchronization processing by designating it as an object to be synchronized with a computer terminal, a copy of a specific folder of one computer terminal is stored in another computer terminal. On the other hand, when a user of another computer terminal updates a file in the synchronization folder, the file in the synchronization folder of one computer terminal is also updated (Patent Document 1).
JP 2004-265418 A

  However, since the file synchronization method described in Patent Document 1 performs synchronization processing for each folder, synchronization management cannot be performed for each file. For example, when a file is moved to another folder There is a problem that synchronization processing cannot be performed. There is a method to synchronize each file, but there is a problem that the hard disk is consumed more than necessary because a copy of the file to be synchronized is stored in a predetermined folder. However, there is a problem that the file is not automatically synchronized and the file version cannot be managed.

  Therefore, the present invention provides a data sharing program, a data sharing system, and a data sharing method that can share data such as files and folders in a synchronized manner with less restrictions between computer terminals connected to a peer-to-peer network. For the purpose.

  In order to achieve the above object, the present invention attaches metadata having at least storage destination address information regarding the storage destination address of each shared computer to actual data shared with other computers connected by peer-to-peer. A data set creation step for creating a data set by the computer, and a data transfer step for transferring the data set created by the data set creation step to the other computer based on the storage destination address information of the metadata. This is a data sharing program characterized in that the program is executed.

  As described above, according to the data sharing program of the present invention, the data set including the actual data is transferred to the other computer sharing the actual data based on the metadata attached to the actual data. The data type that can be shared by synchronizing is not limited, and the storage destination is stored in the metadata, and it is less subject to other restrictions, such as the storage destination folder. Can be done.

  In addition, the present invention provides real data shared with other computers connected by peer-to-peer, storage destination address information related to the storage destination address of each computer to be shared and attached to the real data, and transfer of each shared computer Metadata having at least transferred / untransferred status information related to the status related to completed / untransferred, and when the metadata is received, the metadata of the received data set or the received metadata Of the transferred / untransferred status information, the transferred / untransferred status information changing step for changing its own status to transferred, and the storage destination address information included in the metadata of the received data set or metadata Storing in the storage location of the And when the transferred / untransferred status information is changed by the transfer / untransfer status information change step and the data set or metadata is stored by the storage step, An untransferred computer determination step for determining whether or not the transferred / untransferred status information changed by the untransferred status information change step includes a computer whose status is not transferred, and the untransferred computer determination step A data transfer step of transferring the data set or metadata to any of the untransferred computers based on the storage address information of the metadata when it is determined that a computer whose status has not been transferred is included; , Let the computer run further And wherein the door.

  As described above, the transferred / untransferred status information is provided in the metadata, the transferred / untransferred status information is updated each time, and the transfer process is performed based on the updated information. Duplicate transfer of metadata can be prevented. In such a data sharing program, the metadata further includes creation source computer information related to the computer on which the actual data is created, and includes an untransferred computer in the untransferred computer determination step. If it is determined, the data transfer step is preferably configured to transfer the metadata to the computer on which the actual data is generated based on the source computer information. Further, when the computer further executes a metadata determination step for determining whether or not the received data is only metadata, when it is determined that the received data includes not only the metadata but also the actual data, An update data determination step for determining whether or not the data is updated is further executed by the computer, and the metadata determination step determines that the data is metadata, or the update data determination step determines that the data is update data. If it is determined that the data is not present, the computer further executes a data presence determination step for determining whether the metadata or the data set exists in the storage destination of the metadata storage destination address information. Let the computer further perform a search step to search for data and If is retrieved, it may be configured to execute on metadata change step of changing the destination address information of the meta data further to a computer.

  Furthermore, the present invention provides real data shared with other computers connected by peer-to-peer, storage destination address information related to the storage destination address of each computer to be shared and attached to the real data, and transfer of each shared computer When the actual data or metadata of the data set composed of metadata having at least transferred / untransferred status information related to status regarding transferred / untransferred is updated, update of the transferred / untransferred status information is performed. The transferred / untransferred status information changing step for changing the status of the shared computer other than the computer to which the transfer is performed to untransferred, and the transferred / untransferred status information changing step, the transferred / untransferred status information is When changed, the changed transferred / not transferred A data transfer step of causing the computer to execute a data transfer step of transferring the data set or metadata to any of computers whose status information has not been transferred based on the storage address information of the metadata. It is a program.

  In this way, when the actual data or metadata is updated, the updated actual data or the non-transferred status information other than the updated computer is changed to “untransferred”. Metadata can be transferred to a computer to be shared. In the transfer / non-transfer status information change step, first, the status of all computers in the transfer / untransfer status information may be untransferred, and the status of the updated computer may be transferred. When actual data is updated, the metadata includes version information of the actual data. When the actual data is updated, the computer is further configured to execute a version information update step for updating the version information. If the metadata is updated, the metadata includes an update history of the metadata. When the metadata is updated, an update history change step for changing the update history is further performed by the computer. You may comprise so that it may be made to perform.

  Furthermore, the present invention provides real data shared with other computers connected by peer-to-peer, storage destination address information related to the storage destination address of each computer to be shared and attached to the real data, and transfer of each shared computer When the storage destination of the data set consisting of metadata having at least transferred / untransferred status information related to the status related to completed / untransferred is changed, the storage of the computer in which the storage destination address information is changed is changed. When the storage destination is changed by the storage destination changing step for changing the destination and when the storage destination is changed by the storage destination changing step, the transfer destination / untransferred status information other than the computer where the storage destination is changed is shared. Change the status of the computer to untransferred. When the transferred / untransferred status information is changed by the step and the transferred / untransferred status information changing step, any of the computers whose status of the changed transferred / untransferred status information is not transferred A data sharing program that causes a computer to execute a data transfer step of transferring the updated metadata based on storage address information of the metadata.

  By configuring in this way, when the storage destination of the data set is changed, that is, when the data set is moved to another storage destination, the storage address information of the metadata is changed, and the metadata in which the storage destination address information is changed Are transferred to other shared computers.

  In addition, the present invention creates a data set by attaching metadata having at least storage destination address information regarding the storage destination address of each shared computer to actual data shared with other computers connected by peer-to-peer. And a data transfer means for transferring the data set created by the data set creation means to the other computer based on the storage destination address information of the metadata. It is a data sharing system.

  The present invention relates to real data shared with other computers connected by peer-to-peer, storage destination address information related to the storage destination address of each computer to be shared and attached to the real data, Metadata having at least transferred / untransferred status information relating to the status relating to untransferred, and a receiving means for receiving the metadata or the metadata of the data set received by the receiving means or received Transferred / untransferred status information changing means for changing its own status to transferred among the transferred / untransferred status information of the metadata, and a storage destination in which the metadata includes the received data set or metadata Storage means for storing the address information in the storage destination and the transferred / untransferred When the transferred / untransferred status information is changed by the status information changing unit and the data set or metadata is stored by the storage unit, the transferred / untransferred status information changing unit changed by the transferred / untransferred status information changing unit. Non-transfer computer determining means for determining whether or not the transfer status information includes a computer whose status is not transferred, and the non-transfer computer determining means determines that a computer whose status is not transferred is included. And a data transfer means for transferring the data set or metadata to any untransferred computer based on the storage address information of the metadata. .

  The present invention relates to real data shared with other computers connected by peer-to-peer, storage destination address information related to the storage destination address of each computer to be shared and attached to the real data, When the actual data or metadata of the data set consisting of metadata having at least transferred / untransferred status information related to the status related to untransferred is updated, update is performed in the transferred / untransferred status information. The transferred / untransferred status information changing means for changing the status of a shared computer other than the transferred computer to untransferred and the transferred / untransferred status information changing means change the transferred / untransferred status information. Then, the status of the changed transferred / untransferred status information is changed. Itasu is a data sharing system, characterized in that it and a data transfer means for transferring, based on the data set or the storage address information of the metadata the metadata to any untransferred computer.

  The present invention relates to real data shared with other computers connected by peer-to-peer, storage destination address information related to the storage destination address of each computer to be shared and attached to the real data, When the storage location where the data set consisting of metadata having at least transferred / untransferred status information related to untransferred status is stored is changed, the storage location of the computer where the storage address information is changed is changed. When the storage destination is changed by the storage destination changing means for changing the storage destination and the storage destination changing means, a shared computer other than the computer in which the storage destination is changed among the transferred / untransferred status information. Transferred / untransferred status information changing means for changing the status to untransferred, and the transfer When the transferred / untransferred status information is changed by the completed / untransferred status information changing unit, the changed status of the transferred / untransferred status information is updated to one of the untransferred computers. A data sharing system comprising: data transfer means for transferring the metadata based on the storage address information of the metadata.

  The present invention provides data for creating a data set by attaching metadata having at least storage destination address information related to the storage destination address of each shared computer to actual data shared with other computers connected by peer-to-peer A data creation process comprising: a set creation process; and a data transfer process for transferring the data set created by the data set creation process to the other computer based on the storage destination address information of the metadata. It is a sharing method.

  The present invention relates to real data shared with other computers connected by peer-to-peer, storage destination address information related to the storage destination address of each computer to be shared and attached to the real data, When a data set consisting of metadata having at least transferred / untransferred status information relating to the status relating to untransferred or the metadata thereof is received, the metadata of the received data set or the transfer of the received metadata Transferred / untransferred status information changing step of changing own status to transferred among stored / untransferred status information, and storage of storage destination address information included in the metadata of the received data set or metadata Data sharing that allows the computer to execute the storage process that is stored first When the transferred / untransferred status information is changed by the transferred / untransferred status information changing step and the data set or metadata is stored by the storing step, the transferred / untransferred status is changed. An untransferred computer determination step for determining whether the transferred / untransferred status information changed by the information change step includes a computer whose status is not transferred, and the untransferred computer determination step determines whether the status is And a data transfer step of transferring the data set or metadata to any untransferred computer based on the storage address information of the metadata when it is determined that a transfer computer is included. It is characterized by that.

  The present invention relates to real data shared with other computers connected by peer-to-peer, storage destination address information related to the storage destination address of each computer to be shared and attached to the real data, When the actual data or metadata of the data set consisting of metadata having at least transferred / untransferred status information related to the status related to untransferred is updated, update is performed in the transferred / untransferred status information. The transferred / untransferred status information changing step for changing the status of the shared computer other than the transferred computer to untransferred and the transferred / untransferred status information changing step change the transferred / untransferred status information. Then, the status of the changed transferred / untransferred status information is changed. Itasu is a data sharing method characterized by comprising a data transfer step of transferring on the basis of the data set or the storage address information of the metadata the metadata to any untransferred computer.

    The present invention relates to real data shared with other computers connected by peer-to-peer, storage destination address information related to the storage destination address of each computer to be shared and attached to the real data, When the storage location where the data set consisting of metadata having at least transferred / untransferred status information related to untransferred status is stored is changed, the storage location of the computer where the storage address information is changed is changed. When the storage destination is changed by the storage destination changing step and the storage destination changing step is performed, a shared computer other than the computer in which the storage destination is changed among the transferred / untransferred status information Transferred / untransferred status information changing step for changing the status to untransferred, and the transfer When the transferred / untransferred status information is changed in the completed / untransferred status information changing step, the changed status of the transferred / untransferred status information is updated to one of the untransferred computers. And a data transfer step of transferring the metadata based on the storage address information of the metadata.

  As described above, in the data sharing program, the data sharing system, and the data sharing method according to the present invention, the actual data includes various data such as file data and folder data. By attaching metadata to these various data, , It can be shared by performing synchronous processing with few restrictions.

  In the data sharing program, the data sharing system, and the data sharing method according to the present invention, the computers that share the actual data can be broadly classified into a creation source computer that created the actual data and other shared computers. The transferred / untransferred status information may include information on the creation source computer and other shared computers, or may include only information on other shared computers. When information on the creation source computer is not included in the transferred / untransferred status information, information on the creation source computer is separately included in the metadata. In such a case, when actual data or metadata is updated or changed, first, the status of all computers in the transferred / untransferred status information is changed to untransferred, and the update or change is performed. If it is determined whether the generated computer is the creation source computer, and if it is determined that it is the creation source computer, the updated actual data is transferred to one of the computers whose status of the transferred / untransferred status information is not transferred. Transfer datasets and modified metadata that contain. If it is determined that the computer is not the creation source computer, the updated computer status is changed to “transferred” in the transferred / untransferred status information, and the updated source computer includes the updated actual data. Transfer datasets and modified metadata. Note that the file data and metadata are updated by a computer other than the creation source computer even if the information of the creation source computer terminal is not formally included in the transferred / untransferred status information in this way. In this case, since the updated file data and metadata are first transferred to the creation source computer, the transferred / untransferred status of the creation source computer terminal is substantially the transferred / untransferred status in the present invention. Included in the information.

  As described above, according to the present invention, a data sharing program, a data sharing system, and a data sharing that can share data such as files and folders in synchronization with less restrictions between computer terminals connected to a peer-to-peer network. A method can be provided.

  Next, embodiments of a data sharing program, a data sharing system, and a data sharing method according to the present invention will be described with reference to the drawings. FIG. 1 is a conceptual diagram of file data 10 shared by a data sharing program according to the present embodiment and metadata 12 attached thereto. FIG. 2 stores a data sharing program 14 according to the present embodiment. FIG. 3 is a conceptual diagram showing a state in which the computer terminals 16A, 16B, 16C, and 16D are connected by a peer-to-peer network. FIG. 3 is a diagram of the computer terminals 16A, 16B, 16C, and 16D in which the data sharing program according to the present embodiment is stored. It is a conceptual diagram.

  As shown in FIG. 1, the metadata 12 attached to the file data 10 includes a title, keywords, update history of the metadata 12, version information of the file data 10, and storage of the file data 10 of the shared computer terminal. The destination address information, the information of the creation source computer terminal where the file data is created, and the transferred or untransferred state of each other computer terminal to be shared, that is, the information regarding the transferred / untransferred status, etc. are included. Among these, the information regarding the transferred / untransferred status is managed by setting the computer terminal to which the file data and the updated metadata have been transferred as “true” and the untransferred computer as “false”. . Information included in the metadata 12 is updated by the operation of the data sharing program 14 or a change by the metadata editor program 28. The metadata 12 is stored as a hidden file attached to the file data 10, and a data set is formed by the file data 10 and the metadata 12. In this embodiment, the metadata is described in RDF (Resource Description Framework) based on XML.

  The computer terminals 16A, 16B, 16C, and 16D in which the data sharing program according to the present embodiment is stored are connected via a network 18 including a hub and a router as shown in FIG. 2, thereby forming a peer-to-peer network. is doing. Examples of the network 18 include an intranet and the Internet. Since these computer terminals 16A, 16B, 16C, and 16D have the same configuration, only the configuration of the computer terminal 16A will be described below.

  As shown mainly in FIG. 3, the computer terminal 16A causes the memory 20, the processing unit 22 including a CPU and a chip set, the network connection unit 24 including a LAN card, and the processing unit 22 to execute a specific process. A hard disk 26 capable of storing programs, file data, and the like is provided, and those provided in a normal computer terminal such as a monitor and an input device are naturally provided. The hard disk 26 stores a data sharing program 14 according to this embodiment and a metadata editor program 28 capable of changing metadata. In the hard disk 26, a temporary folder 32 and other folders 34, which are temporary storage destinations for shared data, are created, and the file data 10 and the like can be stored in these folders 32 and 34. it can.

  Next, the operation of the data sharing program 14 according to the present embodiment will be described. First, the case where the file data stored in the computer terminal 16A is shared with the computer terminals 16B and 16C will be described based on the flowchart shown in FIG. First, the user of the computer terminal 16A selects the fill data 10 to be shared among the file data existing in the computer terminal 16A (S100). When the file data 10 is selected, the data sharing program 14 is executed and the metadata editor program 28 is activated (S102). The user of the computer terminal 16A inputs the title and keywords of the shared file data and information on the other computer terminals 16B and 16C sharing the file data 10 by the metadata editor program 28, and saves the metadata 12. (S104). When the metadata 12 is saved, it is attached to the file data 10 and is processed by default in the metadata 12, for example, address information of temporary folders of the other computer terminals 16B and 16C to be shared and other shared information. Processing such as setting the transferred / untransferred status of each computer terminal to “false” is performed (S106). When the metadata default processing is completed, a copy of the data set including the shared file data 10 and the metadata 12 attached thereto is created (S108). Next, the storage destination address information of each computer terminal in the metadata 12 is referred to, so that the storage destination address of one of the computer terminals 16B and 16C in the “false” state, for example, the temporary folder 32 Is a destination address, and a copy of the data set is transferred via the network connection unit 24 (S110). By such a transfer process, the data set is transferred from the computer terminals 16A to 16B as shown in FIG. 5 (arrow a in FIG. 5).

Data Set Transfer Processing Next, processing when the shared file data 10 and metadata 12 data sets are transferred will be described with reference to the flowcharts shown in FIGS. 6A and 6B. First, when the computer terminal 16B receives the data set of the file data 10 and the metadata 12 via the network connection unit 24, the data sharing program 14 is executed, and whether the received data is only the metadata 12 or the file data It is determined whether the data set includes 10 (S200). If it is determined that only the metadata 12 exists, the process proceeds to step 214. This metadata transfer process will be described later. If it is determined in step 200 that the file data 10 is also included, the file data 10 is updated by referring to the version information of the file data 10 included in the metadata 12 of the received data set. Or whether it is a new one (S202). If it is determined that it has been updated, the process proceeds to step 214. The updated file data transfer process will be described later. If it is determined in step 202 that the file data 10 is new, the storage address information of each computer terminal in the metadata 12 is referred to, so that the received shared file data 10 and the metadata 12 The data set is stored at the storage destination address (S204). Next, it is determined whether or not there is a computer terminal whose status is “false” (S206). If it is determined that there is a computer terminal whose status is “false”, a copy of the data set including the shared file data 10 and the metadata 12 attached thereto is created (S208). Next, by referring to the storage destination address information of each computer terminal in the metadata 12, the storage destination address of any one of the computer terminals in the “false” state, for example, the temporary folder 32 is the destination address. Then, a copy of the data set is transferred via the network connection unit 24 (S210). As a result, the data set is transferred from, for example, the computer terminals 16B to 16C in FIG. 5 (arrow b in FIG. 5). When it is confirmed that there is no computer terminal having the transferred / untransferred status “false”, a copy of the metadata 12 is created (S212). Next, by referring to the information of the creation computer terminal of the metadata 12, the storage destination of the file creation computer terminal 16 A is set as the destination address, and a copy of the metadata 12 is transferred via the network connection unit 24. Processed (S214). Thereby, the metadata 12 is transferred from, for example, the computer terminals 16C to 16A in FIG. 5 (arrow c in FIG. 5).

Update of Metadata Next, a case where the metadata 12 is changed and updated by the metadata editor program 28 will be described with reference to the flowchart shown in FIG. First, when the metadata 12 is updated by the user starting up the metadata editor program 28 to change and save the metadata 12 (S300), the data sharing program 14 is executed and the metadata 12 is updated. Is recognized (S302). When the update of the metadata 12 is recognized, the update history of the metadata 12 is changed and the status of all shared computer terminals is changed to “false” (S304). Next, a determination is made as to whether or not the computer terminal for which the metadata 12 has been updated is the creation source computer terminal 16A of the file data 10 (S306), and is determined to be the creation source computer terminal 16A. Then, a copy of the metadata 12 is created (S308). Next, by referring to the storage destination address information of each computer terminal in the metadata 12, the storage destination address of one of the computer terminals 16B and 16C in the “false” state is set as the destination address. A copy of the metadata 12 is transferred via the network connection unit 24 (S310). Thereby, for example, the metadata 12 is transferred from the computer terminals 16A to 16C in FIG. 8 (arrow a in FIG. 8). If it is determined that the computer terminal is not the creation source computer terminal, the transferred / untransferred status of the computer terminal itself that has been subjected to the update process of the metadata 12 is changed to “true” (S310), and the copy of the metadata 12 is made. Is created (S312). Next, by referring to the information of the creation source computer terminal of the metadata 12, the storage destination address of the creation source computer terminal 16A is set as the destination address, and a copy of the metadata 12 is transferred via the network connection unit 24. (S316). Thereby, for example, the metadata 12 is transferred from the computer terminals 16B to 16A in FIG. 8 (arrow b in FIG. 8).

Metadata Transfer Processing Next, the case where the metadata 12 is transferred will be described based on the flowcharts shown in FIGS. 6A and 6B. First, when the metadata 12 is received by the computer terminal via the network connection unit 24, the data sharing program 14 is executed, and the received data is only the metadata 12 as in the case of the data set transfer process. Then, it is determined whether the data set includes the file data 10 (S200). If it is determined that the file data 10 is included, the process proceeds to step 202 and processed according to the data set transfer process described above. When it is determined that only the metadata 12 is stored, it is determined whether the metadata 12 is stored in the storage destination of the storage destination address information of the metadata 12 (S214). If it is determined that it is stored, the process proceeds to step 222, where the metadata 12 is overwritten and stored. If it is determined that the metadata 12 is not stored, the metadata 12 is searched (S216). If the metadata 12 is searched, the storage destination address information of the metadata 12 is changed (S218, S220). The data is overwritten and stored in the stored destination (S222). When the storage destination information of the metadata 12 is changed in this way, the metadata update process described above is performed. When the metadata 12 is not searched (S218), the process proceeds to step 220, and the metadata 12 is stored in the storage destination of the storage destination address information of the metadata 12 (S222). Next, it is determined whether or not there is a computer terminal whose status is “false” (S206). If it is determined that there is a computer terminal having a status of “false”, a copy of the metadata 12 is created (S208), and the storage destination address information of each computer terminal in the metadata 12 is referred to, thereby “false”. Among the computer terminals in the state, the storage destination address of any one of the computer terminals is set as the destination address, and a copy of the metadata 12 is transferred via the network connection unit 24 (S210). Thereby, the metadata 12 is transferred from, for example, the computer terminals 16B to 16C in FIG. 9 (arrow a in FIG. 9). If it is confirmed in step 208 that there is no computer terminal having the transferred / untransferred status of “false”, a copy of the metadata 12 is created (S212), and the information of the computer terminal that created the metadata 12 is stored. By being referred to, the storage destination address of the computer terminal 16A that is the file creation source is set as the destination address, and a copy of the metadata 12 is transferred via the network connection unit 24 (S214). Thereby, the metadata 12 is transferred from the computer terminals 16C to 16A in FIG. 9, for example (arrow b in FIG. 9).

Moving data sets Next, the processing of the case of moving the data set of the shared file data 10 and metadata 12 stored in the temporary folder 32 of the computer terminal 16B in another folder 34, the flow chart shown in FIG. 10 Based on First, as shown by the arrow X in FIG. 3, when the data set composed of the shared file data 10 and the metadata 12 is moved to another folder 34 (S400), the data sharing program 14 is executed, and the data set is moved. Recognized, the address of the storage destination of the computer terminal 16B of the metadata 12 is changed to another folder 34 (S402), and thereafter, the same operations as in the above steps 304 to 316 are performed (S404 to 416).

Update of File Data Next, a case where the file data 10 is changed and updated will be described with reference to the flowcharts shown in FIGS. 11A and 11B. First, when the user changes the file data 10 and saves it, the update of the file data 10 is recognized (S500), the data sharing program 14 is executed, and the file data 10 updated by the data sharing program 14 is updated. It is determined whether or not the metadata 12 is attached (S502). When it is determined that the metadata 12 is not attached, the operation of the data sharing program 14 ends. If it is determined that the metadata 12 is attached, it is determined whether or not the file subjected to the change / save process can be overwritten (S504). If it is determined that overwriting is not possible, storage processing is performed with a new file name, and processing for creating a data set including new shared file data is performed according to the flow shown in FIG. If it is determined that overwriting is possible, it is overwritten and saved (S506). Next, the version information of the file data 10 included in the metadata attached to the updated file data 10 is updated, and the transferred / untransferred status of all shared computer terminals is changed to “false” (S508). It is determined whether or not the computer terminal on which the file data 10 has been updated is the computer terminal that created the file data 10 (S510). If it is determined that the computer terminal is the creation source computer terminal, a copy of the data set including the updated file data 10 and metadata 12 is created (S512). Next, by referring to the storage destination address information of each computer terminal in the metadata 12, the storage destination address of one of the computer terminals 16B and 16C in the “false” state is set as the destination address. Then, a copy of the data set is transferred via the network connection unit 24 (S514). Thereby, the data set is transferred to, for example, the computer terminals 16A to 16C in FIG. 12 (arrow a in FIG. 12). If it is determined that the computer terminal is not the creation source computer terminal, the transferred / untransferred status of the computer terminal itself that has been updated for the file data 10 is changed to “true” (S516), and the updated file data is updated. A copy of the data set consisting of 10 and metadata 12 is created (S518). Next, by referring to the information of the creation computer terminal of the metadata 12, the storage destination address of the creation computer terminal 16A is set as the destination address, and a copy of the data set is transferred via the network connection unit 24. (S520). Thereby, the metadata 12 is transferred from the computer terminals 16B to 16A in FIG. 12, for example (arrow b in FIG. 12).

Transfer update file data
Next, a case where updated file data is transferred will be described. If it is determined in step 202 of the data set transfer process described above that the file is an update file, the process proceeds to step 214 of the metadata transfer process described above, and thereafter, the same process as the metadata transfer process is performed.

It is a conceptual diagram of the file data 10 shared by the Example of the data sharing program which concerns on this invention, and the metadata 12 attached to it. It is a conceptual diagram which shows the state by which the computer terminal in which the data sharing program concerning a present Example was stored was connected by the peer to peer network. It is a conceptual diagram of the computer terminal in which the data sharing program based on a present Example was stored. It is a flowchart which shows the operation | movement of a creation process of a shared file by the data sharing program which concerns on a present Example. It is a conceptual diagram which shows the state which a data set transfers between the computer terminals in which the data sharing program which concerns on a present Example was stored. It is a flowchart which shows the operation | movement of the transfer process of a data set by the data sharing program which concerns on a present Example. It is a flowchart which shows the operation | movement of the transfer process of a data set by the data sharing program which concerns on a present Example. It is a flowchart which shows the operation | movement of the update process of metadata by the data sharing program which concerns on a present Example. It is a conceptual diagram which shows the state which transfers metadata between the computer terminals in which the data sharing program which concerns on a present Example was stored. It is a conceptual diagram which shows the state which transfers metadata between the computer terminals in which the data sharing program which concerns on a present Example was stored. It is a flowchart which shows the operation | movement of the process when a data set is moved by the data sharing program which concerns on a present Example. It is a flowchart which shows operation | movement of the update process of file data by the data sharing program which concerns on a present Example. It is a flowchart which shows operation | movement of the update process of file data by the data sharing program which concerns on a present Example. It is a conceptual diagram which shows the state which the data set containing the updated file data transfers between the computer terminals in which the data sharing program which concerns on a present Example was stored.

Explanation of symbols

10 File Data 12 Metadata 14 Data Sharing Program 16A, 16B, 16C, 16D Computer Terminal 28 Metadata Editor Program 32 Temporary Folder 34 Other Folder

Claims (9)

On the computer,
For real data shared with other computers connected by peer-to-peer, storage destination address information regarding the storage destination address of each computer to be shared, and transferred / untransferred status regarding the status regarding the transfer / non-transfer of each computer to be shared A dataset creation step for creating a dataset by attaching metadata having at least information ;
A first data transfer step of transferring the data set created by the data set creation step to one other untransferred computer among the computers based on the storage address information of the metadata;
When the data set is received from another computer, the first transferred / untransferred status is changed to transferred among the transferred / untransferred status information in the metadata of the received data set. A transfer status information change step;
A storage step of storing the received data set or metadata in a storage destination of storage destination address information included in the metadata;
When the transferred / untransferred status information is changed by the first transferred / untransferred status information changing step and the data set or the received metadata is stored by the storing step, the first transferred / untransferred status information is stored. An untransferred computer determination step for determining whether or not the transferred / untransferred status information changed by the transfer status information change step includes a computer whose status is not transferred;
If the untransferred computer determination step determines that a computer whose status has not been transferred is included, the data set is transferred to one of the other untransferred computers among the computers. A second data transfer step for transferring based on the storage destination address information;
Data sharing program for causing the execution. In addition to the computer,
When the actual data or metadata of the data set is updated, the second transferred data that changes the status of the shared computer other than the updated computer to non-transferred among the transferred / untransferred status information・ Untransfer status information change step,
When the transferred / untransferred status information is changed in the second transferred / untransferred status information changing step, the changed status of the transferred / untransferred status information among the computers is not transferred. A third data transfer step of transferring the data set or metadata to any one of the other computers based on the storage address information of the metadata;
Claim 1, wherein the data sharing program, characterized in that for the execution. In addition to the computer,
When the storage location where the data set is stored is changed, a storage location change step for changing the storage location of the computer where the storage location address information is changed,
When the storage location is changed in the storage location changing step, the status of other shared computers other than the computer where the storage location is changed is changed to untransferred in the transferred / untransferred status information. A third transferred / untransferred status information changing step;
When the transferred / untransferred status information is changed by the third transferred / untransferred status information changing step, the changed status of the transferred / untransferred status information among the computers is not transferred. A fourth data transfer step of transferring the updated metadata to any one of the other computers based on the storage address information of the metadata;
The data sharing program according to claim 1, wherein the data sharing program is executed. For real data shared with other computers connected by peer-to-peer, storage destination address information regarding the storage destination address of each computer to be shared, and transferred / untransferred status regarding the status regarding the transfer / non-transfer of each computer to be shared A data set creation means for creating a data set by attaching metadata having at least information ;
First data transfer means for transferring the data set created by the data set creation means to one other untransferred computer among the computers based on the storage address information of the metadata;
Receiving means for receiving the data set from another computer;
First transferred / untransferred status information changing means for changing its own status to transferred among the metadata of the data set received by the receiving means or the transferred / untransferred status information of the received metadata; ,
Storage means for storing the received data set or metadata in a storage destination of storage destination address information included in the metadata;
When the transferred / untransferred status information is changed by the first transferred / untransferred status information changing means and the data set or metadata is stored by the storage means, the first transferred / untransferred status information Untransferred computer determining means for determining whether or not the transferred / untransferred status information changed by the changing means includes a computer whose status is not transferred;
If the untransferred computer determination means determines that a computer whose status has not been transferred is included, the data set or metadata is transferred to the other untransferred one of the computers. Second data transfer means for transferring based on metadata storage address information;
A computer for a data sharing system. When the actual data or metadata of the data set is updated, the second transferred data that changes the status of the shared computer other than the updated computer to non-transferred among the transferred / untransferred status information・ Untransfer status information change means,
When the transferred / untransferred status information is changed by the second transferred / untransferred status information changing unit, the status of the changed transferred / untransferred status information among the computers is not transferred. Third data transfer means for transferring the data set or metadata to any one of the other computers based on the storage address information of the metadata;
5. The computer for data sharing system according to claim 4, further comprising: When the storage location where the data set is stored is changed, storage location changing means for changing the storage location of the computer whose storage location address information has been changed,
When the storage destination is changed by the storage destination changing means, the status of other shared computers other than the computer whose storage destination has been changed is changed to untransferred in the transferred / untransferred status information. A third transferred / untransferred status information changing means;
When the transferred / untransferred status information is changed by the third transferred / untransferred status information changing unit, the changed status of the transferred / untransferred status information among the computers is not transferred. A fourth data transfer means for transferring the updated metadata to any one of the other computers based on the storage address information of the metadata;
A computer for a data sharing system according to claim 4 or 5, characterized by comprising : For real data shared with other computers connected by peer-to-peer, storage destination address information regarding the storage destination address of each computer to be shared, and transferred / untransferred status regarding the status regarding the transfer / non-transfer of each shared computer a higher data set creation factory create a data set by appending metadata having at least information,
A first data transfer step of transferring the data set created by the data set creation step to one other untransferred computer among the computers based on the storage address information of the metadata;
When the data set from another computer is received, the status of the received data set or the transferred / untransferred status information of the received metadata is changed to transferred. First transferred / untransferred status information changing process;
A storage step of storing the received data set or metadata in a storage destination of storage destination address information included in the metadata;
When the transferred / untransferred status information is changed by the first transferred / untransferred status information changing step and the data set or metadata is stored by the storing step, the first transferred / untransferred status information is stored. An untransferred computer determination step for determining whether the transferred / untransferred status information changed by the change step includes a computer whose status is not transferred;
If the untransferred computer determination step determines that a computer whose status has not been transferred is included, the data set or metadata is transferred to one of the untransferred computers among the computers. A second data transfer step of transferring based on the storage address information of the metadata;
A data sharing method characterized by comprising: When the actual data or metadata of the data set is updated, the second transferred data that changes the status of the shared computer other than the updated computer to non-transferred among the transferred / untransferred status information・ Untransfer status information change process,
When the transferred / untransferred status information is changed in the second transferred / untransferred status information changing step, the changed status of the transferred / untransferred status information among the computers is not transferred. A third data transfer step of transferring the data set or metadata to any of other computers based on the storage address information of the metadata;
The data sharing method according to claim 7, further comprising : When the storage location where the data set is stored is changed, a storage location change step for changing the storage location of the computer where the storage location address information is changed,
When the storage destination is changed by the storage destination changing step, the status of other shared computers other than the computer whose storage destination has been changed is changed to untransferred in the transferred / untransferred status information. A third transferred / untransferred status information changing step;
When the transferred / untransferred status information is changed in the third transferred / untransferred status information changing step, the status of the changed transferred / untransferred status information among the computers is not transferred. A fourth data transfer step of transferring the updated metadata to any one of the other computers based on the storage address information of the metadata;
The data sharing method according to claim 7 or 8, further comprising :

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