JP4385280B2 - Data input / output control apparatus and method - Google Patents

Description

  The present invention relates to a data input / output control apparatus and method, and is suitably applied to, for example, a video server system that controls input / output of A / V (Audio / Visual) data.

  Conventionally, as a video server used in a video server system, A / V data input from an external device such as an editing device via an input port is recorded as a file on a recording device such as a hard disk, and the recorded file is again recorded. Some data are converted into A / V data, reproduced, and output to an external device via an output port.

Such a video server has a plurality of input / output ports to handle access from a plurality of external devices, and further records and reproduces A / V data via the plurality of input / output ports. Therefore, a file manager that performs file management of the A / V data is provided, and the file manager can perform file management in an integrated manner. (For example, see Patent Document 1)
Japanese Patent Laid-Open No. 10-021179

  By the way, the video server as described above has a recording device, an input / output port, and a file manager in the casing, and the space in the casing is limited. In order to cope with this type of access, there is a problem that even if an attempt is made to increase the number of input / output ports, the number of input / output ports is limited and it is difficult to expand the input / output ports.

  The present invention has been made in view of the above points, and intends to propose a data input / output control device that can be easily expanded.

In order to solve such a problem, in the present invention, in a data input / output control device that controls input / output of data to / from an external storage holding unit that stores and holds predetermined data as a file, a file stored in the storage holding unit is stored in a file. A management unit that performs centralized management based on file management information, and connects to the management unit via a predetermined network, writes data input from the outside under the management of the management unit as a file to the storage holding unit, and stores When a failure occurs in the connection between the input / output means, the management means, and the input / output means that reads out the file written in the holding means as data and outputs it to the outside, the management means and the input / output means are made normal immediately after the failure is recovered. provided between normal operation returning means for returning the Do operation, input and output means, the data as a file in the storage holding means When writing and when reading a file as data from the memory holding means, predetermined information for specifying a portion written or read up to now is stored in a predetermined storage unit as progress information of the file, and normal operation When the connection between the management unit and the input / output unit is disconnected due to an abnormality in the network connecting the management unit and the input / output unit, the recovery unit reconnects the management unit and the input / output unit immediately after the network is restored. Thus, when the management means and the input / output means are returned to normal operation, and the connection of the management means and the input / output means is disconnected due to abnormal termination of the input / output means, after the input / output means is restarted, The management means and the input / output means are immediately reconnected, and the file progress information stored in the storage unit and the input / output means The closing means of the file closed by the input / output means at the time of termination is transmitted to the management means as the current state of the file, and the management means and the input / output means are updated by the management means. When the connection between the management means and the input / output means is disconnected due to abnormal termination of the management means, immediately after the management means is restarted, the management means and the input / output means are reconnected. The writing and reading of data by the input / output means are stopped, the file of the data is closed, and the progress information of the file stored in the storage unit by the time of the stop is set as the current state of the file to the management means. Tell the management means to update the file management information, to return the management means and input / output means to normal operation, When the connection is cut off due to abnormal termination of both the management means and the input / output means, immediately after the management means and the input / output means are restarted, the management means and the input / output means are immediately reconnected, and the input / output means terminates abnormally. Normal operation of the management means and the input / output means by transmitting the progress information of the file stored in the storage unit by the time to the management means as the current state of the file and causing the management means to update the file management information was so that is returned to.

As a result, according to this data input / output control device, files can be shared among a plurality of input / output means under the control of the management means, and the number of input / output means connected to the network can be increased. The number of data that can be input / output simultaneously can be increased. Even when a failure occurs, it can operate normally immediately after the failure is recovered.

In the present invention, the data output control device, the data input-output control method for controlling input and output of the data to an external storage holding means for storing and holding the predetermined data as a file, to input and output data, data a plurality of output means of the output control device, the file to be stored and held in the storage holding means centrally managed by the file management information, the first connecting via the management unit and the network data input-output control unit And a second step in which the input / output unit writes data input from the outside to the storage holding unit and reads the data written to the storage holding unit and outputs the data to the outside under the management of the management unit If, when the normal operation returning means of the data input-output control apparatus is a failure in the connection management means and the output means occurs after failure recovery, immediately And a third step of restoring the physical means and output means in normal operation is provided, when in the second step, reading out the file as data from and memory retention means when writing data as a file in the storage holding means, Predetermined information for specifying a portion written or read up to now is stored in a predetermined storage unit as progress information of the file, and in the third step, a network connecting the management means and the input / output means If the connection between the management unit and the input / output unit is disconnected due to an abnormality in the network, the management unit and the input / output unit operate normally by reconnecting the management unit and the input / output unit immediately after the network is restored. If the connection between the management unit and the input / output unit is disconnected due to abnormal termination of the input / output unit, restart the input / output unit. After that, the management means and the input / output means were immediately reconnected, and the file progress information stored in the storage unit until the abnormal end of the input / output means and the input / output means were closed when the input / output means ended abnormally. The close information of the file is transmitted to the management means as the current state of the file, and the management means and the input / output means are returned to normal operation by causing the management means to update the file management information. If the connection between the management unit and the input / output unit is disconnected due to abnormal termination of the management unit, the management unit and the input / output unit are immediately reconnected after the management unit is restarted, and data is written and read by the input / output unit. In addition to stopping, the file of the data is closed, and the progress information of the file stored in the storage unit until the stop is displayed. The management means and the input / output means are returned to normal operation by transmitting the file management information to the management means as the current status, and the management means and the input / output means are returned to normal operation, and connected by abnormal termination of both the management means and the input / output means. Is disconnected, the management unit and the input / output unit are immediately reconnected after the restarting of the management unit and the input / output unit, and the progress information of the file stored in the storage unit until the abnormal termination of the input / output unit Is transmitted to the management means as the current state of the file, and the management means and the input / output means are returned to normal operation by causing the management means to update the file management information .

As a result, according to this data input / output control method, a file can be shared among a plurality of input / output means under the management of the management means, and the number of input / output means connected to the network can be increased. The number of data that can be input / output simultaneously can be increased. Even when a failure occurs, it can operate normally immediately after the failure is recovered.

As described above, according to the present invention, in the data input / output control device, a file can be shared among a plurality of input / output means under the management of the management means, and the input / output means connected to the network can be shared. By increasing the number, the number of data that can be input / output simultaneously can be increased. Even when a failure occurs, it can operate normally immediately after the failure is recovered. Thus, a data input / output control device that can be easily expanded can be realized.

According to the present invention, in the data input / output control method, a file can be shared among a plurality of input / output means under the management of the management means, and the number of input / output means connected to the network is increased. It is possible to increase the number of data that can be input / output simultaneously. Even when a failure occurs, it can operate normally immediately after the failure is recovered. Thus, a data input / output control method that can be easily expanded can be realized.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

(1) Configuration of Video Server System According to this Embodiment In FIG. 1, reference numeral 1 denotes a video server system according to this embodiment as a whole, having a plurality of input / output ports for inputting / outputting A / V data. A plurality of input / output devices 2 ₁ to 2 _n that perform recording / playback processing of the A / V data, and a RAID (Redundant Array of Independent Disks) configuration for recording the A / V data as an A / V file. The storage 3 and the file manager 4 that centrally manages the A / V file are configured, and the file manager 4 and the input / output devices 2 ₁ to 2 _n are respectively connected via the Ethernet (registered trademark) 5. The input / output devices 2 ₁ to 2 _n and the storage 3 are connected to each other via a dedicated cable 6.

In the video server system 1, when the input / output devices 2 ₁ to 2 _n receive an A / V data recording request from the outside during recording of A / V data, the A / V data for recording the A / V data is recorded. File management information managed by the file manager 4 such as the file name and open / close information of the V file and the usage status of the input / output port is transferred to the Ethernet (registered trademark) 5 by the file manager 4 and the input / output devices 2 ₁ to 2 _n. To communicate through.

In the video server system 1, based on the file management information, the A / V data input through the input port is subjected to predetermined encoding processing by the input / output devices 2 ₁ to 2 _n. This is recorded in the storage 3 as an A / V file.

Further, when A / V data is reproduced, in the video server system 1, file management information of the A / V file managed by the file manager 4 is transmitted to the file manager 4 and the input / output devices 2 ₁ to 2 _n via the Ethernet. (Registered trademark) 5 is exchanged, and based on the file management information, the input / output devices 2 ₁ to 2 _n read out a predetermined A / V file from the storage 3 and decode this to decode the A / V The data is converted into data and output from the output port.

As described above, in this video server system 1, the file management information of the A / V file handled by each of the input / output devices 2 ₁ to 2 _n is transmitted to each of the input / output devices 2 ₁ to 2 _n and the Ethernet (registered trademark) 5. The file manager 4 connected via the file system is managed in an integrated manner, whereby the A / V file can be shared between the input / output devices 2 ₁ to 2 _n under the management of the file manager 4. In addition, the number of input / output ports can be easily increased only by increasing the number of input / output devices 2 ₁ to 2 _n connected to the Ethernet (registered trademark) 5.

(2) Configuration of File Manager and Input / Output Device Next, the configuration of the input / output devices 2 ₁ to 2 _n and the file manager 4 will be described with reference to FIG.

The input / output devices 2 _{1 to} 2 _n include a file manager unit 10 and a data processing unit 11. Here, the file manager unit 10 includes a CPU (Central Processing Unit) 12, a ROM (Read Only Memory) 13 in which various programs such as a normal operation return processing program to be described later are stored, and a RAM (RAM) used as a work area of the CPU 12. Random Access Memory) 14, SRAM (Static Random Access Memory) 15, which is a nonvolatile memory for storing and holding file management information of A / V files handled by the input / output devices 2 ₁ to 2 _n , an interface unit 16, and 17 is connected to the Ethernet (registered trademark) 5 via the interface unit 16 and is also connected to the data processing unit 11 via the interface unit 17. ing.

The data processing unit 11 for outputting an input port P _{I1 to P I3,} and a predetermined A / V data to an external device (not shown) for inputting a predetermined A / V data sent from an external device (not shown) Output ports P _{O1 to} P _O3 , which are connected to the file manager unit 10 and are connected to the storage 3 via a dedicated cable 6.

On the other hand, the file manager 4 is a hard disk in which various programs such as file management information for managing A / V files handled by the CPU 20 and the input / output devices 2 ₁ to 2 _n and a normal operation return processing program to be described later are stored. 21, a RAM 22 used as a work area of the CPU 20, and an interface unit 23 are connected via a CPU bus 24, and are connected to the Ethernet (registered trademark) 5 via the interface unit 23. Yes.

In practice, when recording the A / V data, file manager 4, recording request input and output device ₂ 1 to 2 _n of the predetermined A / V data is receives from the outside, to the input-output device ₂ 1 to 2 _n Then, file management information including open information of the A / V file for recording the A / V data is transmitted.

When the input / output devices 2 _{1 to} 2 _n receive the file management information transmitted from the file manager 4, _{first, the} input / output devices 2 _{1 to} 2 _n store the file management information in the SRAM 15 of the file manager unit 10 and further send it to the data processing unit 11.

Based on this file management information, the data processing unit 11 opens a predetermined A / V file in the storage 3, and at this time, for example, a predetermined encoding process is performed on the A / V data input to the input port _PI1. This is recorded in the A / V file.

  At this time, the data processing unit 11 is configured to send to the file manager unit 10 duration information indicating how much A / V data has been recorded. Then, the file manager unit 10 records the duration information transmitted from the data processing unit 11 in the SRAM 15 one by one.

  Thereafter, when all the recording of the A / V data is completed, the data processing unit 11 closes the A / V file in which the A / V data is recorded, and sends the close information of the A / V file to the file manager unit 10. Send it out.

  When the file manager unit 10 receives the close information of the A / V file from the data processing unit 11, the file manager unit 10 transmits the file management information including the close information to the file manager 4, and also transmits the file management information of the A / V file. Delete from the SRAM 15.

In this way, the file manager 4 writes the file management information to the storage 3 by the input / output devices 2 ₁ to 2 _n by exchanging file management information with the input / output devices 2 ₁ to 2 _n when the A / V file is opened and closed. A / V files are centrally managed to control recording of A / V data in the input / output devices 2 ₁ to 2 _n .

Further, when reproducing the A / V data, the file manager 4 includes a file including open information of the A / V file so that the input / output devices 2 ₁ to 2 _n open the predetermined A / V file. The management information is transmitted to the input / output devices 2 ₁ to 2 _n .

The input / output devices 2 _{1 to} 2 _n open a predetermined A / V file recorded in the storage 3 based on the file management information transmitted from the file manager 4 and While performing the decoding process, this is converted into A / V data, and the A / V data is output from the output port _PO1, for example.

  Even in this case, the data processing unit 11 sends the file management information to the file manager unit 10 one by one. Then, the file manager unit 10 stores the file management information received from the data processing unit 11 in the SRAM 15 one by one.

  Thereafter, when the reproduction of the A / V data is completed, the data processing unit 11 closes the opened A / V file and sends the A / V file close information to the file manager unit 10.

  When the file manager unit 10 receives the close information of the A / V file from the data processing unit 11, the file manager unit 10 transmits the file management information including the close information to the file manager 4, and also receives the file management information of the A / V file. Delete from the SRAM 15.

As described above, the file manager 4 reads the file management information from the storage 3 by the input / output devices 2 ₁ to 2 _n by exchanging the file management information with the input / output devices 2 ₁ to 2 _n when the A / V file is opened and closed. The A / V file is centrally managed to control the reproduction of A / V data in the input / output devices 2 ₁ to 2 _n .

By the way, in the video server system 1 as described above, the file manager 4 and the input / output devices 2 ₁ to 2 _n are separated via the Ethernet (registered trademark) 5. It is necessary to consider the case where an abnormality occurs in the connection with the devices 2 _{1 to} 2 _n .

For example, when the file manager 4 is abnormally terminated, the file manager 4 and the input / output devices 2 ₁ to 2 _n cannot be connected until the file manager 4 is restarted.

When such a failure (hereinafter referred to as a connection failure) occurs, the file manager 4 and each of the input / output devices 2 ₁ to 2 _n cannot communicate with each other for a certain period. _The file management information cannot be exchanged with ₁ to _2n .

As a result, the file management information managed by the file manager 4 and the file management information (for example, open / close information) managed by the file manager unit 10 of each of the input / output devices 2 ₁ to 2 _n do not match. There is a possibility that the video server system 1 cannot operate normally even after recovery from the connection failure.

  Therefore, in the video server system 1 of the present invention, even when such a connection failure occurs, it has a normal operation return function so that it can operate normally immediately after the failure is recovered. The return function will be described below.

(3) Function for returning to normal operation As a connection failure that may occur in the video server system 1, an abnormal communication path between the file manager 4 and the input / output devices 2 ₁ to 2 _n (for example, an Ethernet (registered trademark) cable is disconnected). Connection failure due to abnormal termination of input / output devices 2 ₁ to 2 _n , connection failure due to abnormal termination of file manager 4, abnormal termination of both input / output devices 2 ₁ to 2 _n and file manager 4 Possible connection failure. When these connection failures occur, the file manager 4 and the input / output devices 2 ₁ to 2 _n cannot communicate until the failure is recovered. As a result, if no measures against the failure are taken, The above problems may occur. Therefore, the video server system 1 of the present invention has a normal operation return function in response to these connection failures.

(3-1) Normal operation return processing at the time of connection failure due to abnormality of communication path between file manager 4 and input / output devices 2 ₁ to 2 _n First, a communication path between file manager 4 and input / output devices 2 ₁ to 2 _n A case of a connection failure due to an abnormality will be described.

In this case, since the file manager 4 and the input / output devices 2 ₁ to 2 _n themselves are operating normally, it is only necessary to reconnect immediately after the failure recovery.

Therefore, in this video server system 1, the CPU 12 of each of the input / output devices 2 ₁ to 2 _n checks a connection with the file manager 4 (hereinafter referred to as a heartbeat command). Are transmitted at regular intervals, and when the CPU 20 of the file manager 4 receives the heartbeat command, a response command to the heartbeat command is returned to the input / output devices 2 ₁ to 2 _n . .

Thereby, the CPU 12 of each of the input / output devices 2 ₁ to 2 _n can recognize that the connection between itself and the file manager 4 has been disconnected when the response command is not returned from the file manager 4. On the other hand, the CPU 20 of the file manager 4 disconnects itself from the input / output devices 2 ₁ to 2 _n when a heartbeat command is not transmitted from the input / output devices 2 ₁ to 2 _n within a certain period. Can be recognized.

Upon recognizing the disconnection in this way, the CPU 12 of the input / output devices 2 ₁ to 2 _n starts a connection process to the file manager 4, and the CPU 20 of the file manager 4 responds to this, whereby each input / output device. 2 _{1 to} 2 _n and the file manager 4 are reconnected.

Thus, as this in the video server system 1, the abnormality in the communication path between the file manager 4 and the input-output device 2 ₁ to 2 _n, connected with the file manager 4 and input-output device 2 ₁ to 2 _n is disconnected However, it is possible to return to normal operation immediately after recovery from the failure.

(3-2) in the normal operation restoration process followed when a connection failure due to abnormal termination of the input-output device ₂ 1 to 2 _n, will be described for the case of connection failure due to abnormal termination of the input-output device ₂ 1 to 2 _n.

Here, if the input / output devices 2 _{1 to} 2 _n are in the process of recording or reproducing A / V data, the A / V file corresponding to the A / V data is opened in the input / output devices 2 ₁ to 2 _n. It is. In this state, if the input / output devices 2 _{1 to} 2 _n end abnormally, the input / output devices 2 ₁ to 2 _n can only record or play back the A / V file until the middle of the A / V data. It will be closed.

On the other hand, since the file manager 4 holds only file management information when the input / output devices 2 ₁ to 2 _n open the A / V file, the input / output devices 2 ₁ to 2 _n can be It is recognized that the A / V data is being recorded or reproduced, and the A / V file corresponding to the A / V data remains open.

Therefore, in this case, after the input / output devices 2 ₁ to 2 _n are restarted to confirm the connection with the file manager 4, the duration information of the A / V file recorded in the SRAM 15 one by one until the abnormal termination is performed. The closing information of the A / V file closed at the abnormal end is transmitted to the file manager 4 as file management information.

Then, the file manager 4 updates the file management information transmitted from the input / output devices 2 ₁ to 2 _n after the failure recovery as the latest file management information.

Thus, in this video server system 1, the abnormal termination of the input-output device 2 ₁ to 2 _n, as connected with the file manager 4 and input-output device 2 ₁ to 2 _n is disconnected, after failure recovery, respectively It is possible to immediately return to normal operation by synchronizing the file management information.

(3-3) Normal Operation Return Processing at the Time of Connection Failure Due to Abnormal Termination of File Manager 4 Next, a case of a connection failure due to abnormal termination of the file manager 4 will be described.

Here, _assuming that the input / output devices 2 _{1 to} 2 _n are in the process of recording or reproducing A / V data, the A / V file corresponding to the A / V data is opened in the storage 3. If the file manager 4 terminates abnormally at this time, the file manager 4 recognizes that all A / V files are closed at the time of restart.

Therefore, in this case, the file manager 4, input-output device by requesting to restart against ₂ 1 to 2 _n, the input-output device ₂ 1 to 2 _n to restart the input and output device _{2 1} The recording / reproducing process of A / V data by ~ _2n is stopped and the A / V file corresponding to the A / V data is closed. The file manager 4 receives from the input / output devices 2 ₁ to 2 _n the file management information including the duration information of the A / V file that has been recorded in the SRAM 15 of the input / output devices 2 ₁ to 2 _n until then. The file management information is updated as the latest file information.

On the other hand, the input / output devices 2 _{1 to} 2 _n initialize the file management information after transmitting the file management information recorded in the SRAM 15 one by one to the file manager 4.

Thus, in this video server system 1, even if the connection between the file manager 4 and the input / output devices 2 ₁ to 2 _n is disconnected due to the abnormal termination of the file manager 4, each file management information is stored after the failure recovery. By synchronizing, normal operation can be immediately restored.

(3-4) input-output device ₂ 1 to 2 _n and the normal operation return processing at the time of connection failure due to abnormal termination of both the File Manager 4 Next, both input and output devices ₂ 1 to 2 _n and the file manager 4 abnormality A case of connection failure due to termination will be described.

Here, _assuming that the input / output devices 2 _{1 to} 2 _n are in the process of recording or reproducing A / V data, the A / V file corresponding to the A / V data is opened in the storage 3. In this state, if the input / output devices 2 _{1 to} 2 _n end abnormally, the input / output devices 2 ₁ to 2 _n can only record or play back the A / V file until the middle of the A / V data. It will be closed.

  On the other hand, the file manager 4 also recognizes that all A / V files are closed upon restart after abnormal termination.

Therefore, in this case, after the input / output devices 2 ₁ to 2 _n are restarted to confirm the connection with the file manager 4, the duration information of the A / V file recorded in the SRAM 15 one by one until the abnormal termination is performed. The included file management information is transmitted to the file manager 4.

Then, the file manager 4 updates the file management information transmitted from the input / output devices 2 ₁ to 2 _n after the failure recovery as the latest file management information.

Thus, in this video server system 1, even if the connection between the file manager 4 and the input / output devices 2 ₁ to 2 _n is disconnected due to the abnormal termination of both the input / output devices 2 ₁ to 2 _n and the file manager 4. After the failure recovery, the normal operation can be immediately restored by synchronizing each file management information.

(4) Normal Operation Return Processing Procedure Here, normal operation return processing at the time of a connection failure between the file manager 4 and the input / output devices 2 ₁ to 2 _n as described above is performed on the input / output device side shown in FIGS. Control of the CPU 12 (FIG. 2) of the input / output devices 2 ₁ to 2 _n according to the normal operation return processing procedures RT1 and RT2, and the normal operation return processing procedures RT3 and RT4 on the file manager side shown in FIGS. This is performed under the control of the CPU 20 (FIG. 2) of the file manager 4.

First, the normal operation return processing procedure RT1 when the input / output devices 2 _{1 to} 2 _n are activated will be described. When activated, the CPU 12 of the input / output devices 2 _{1 to} 2 _n reads the normal operation return processing program from the ROM 13 and starts the normal operation return processing procedure RT1 in step SP0. To start the connection process. At this time CPU12 is unique number of itself to the file manager 4 containing the ( "1" if for example input-output device 2 _1, if input-output device 2 ₂ "2") or the like issues an authentication command.

  Subsequently, the CPU 12 proceeds to step SP2 and determines whether or not the connection with the file manager 4 is completed. If the CPU 12 obtains a negative result in step SP2, it returns to step SP1 and starts the connection process to the file manager 4 again. If it obtains an affirmative result, it proceeds to step SP3 and is recorded in the SRAM 15. Check for file management information.

Subsequently, the CPU 12 proceeds to step SP4 and determines whether or not file management information exists in the SRAM 15. If a negative result is obtained in step SP4, this means that the input / output devices 2 ₁ to 2 _n have been activated for the first time, or that A / V data recording or playback processing has not been executed during the previous operation. In this case, the CPU 12 proceeds to step SP6 and ends the normal operation return processing procedure RT1 at the time of activation.

If an affirmative result is obtained, this indicates that the input / output devices 2 ₁ to 2 _n ended abnormally during the previous operation during recording or reproduction of A / V data. In this case, the CPU 12 proceeds to step SP5 and transmits the file management information including the duration information and the close information recorded in the SRAM 15 to the file manager 4.

Thereby, the file management information of the input / output devices 2 ₁ to 2 _n and the file manager 4 can be synchronized.

Then, the CPU 12 proceeds to step SP6 and ends the normal operation return processing procedure RT1 when the input / output devices 2 ₁ to 2 _n are activated.

Here, when the normal operation return processing procedure RT1 at the time of activation ends, the CPU 12 enters a steady state, and starts a normal operation return processing procedure RT2 in the steady state shown in FIG. In practice, when the CPU 12 moves to the steady state, the normal operation return processing procedure RT2 is started in step SP10, and in the subsequent step SP11, the connection between the input / output devices 2 ₁ to 2 _n and the file manager 4 is disconnected. It is determined whether or not this is detected.

Here, the CPU 12 recognizes that the connection between the input / output devices 2 ₁ to 2 _n and the file manager 4 is disconnected when there is no response to the heartbeat command transmitted to the file manager 4. Yes.

In step SP11, the CPU 12 waits until an affirmative result is obtained. If the affirmative result is obtained, the CPU 12 recognizes that the connection between the input / output devices 2 ₁ to 2 _n and the file manager 4 has been disconnected, and proceeds to step SP12. Connection processing is started again for the manager 4. Note that the CPU 12 at this time needs to inform the file manager 4 that the connection process is the second or more connection process after startup. That is, the second or more connection processing after startup means that the input / output devices 2 ₁ to 2 _n themselves are operating normally in a steady state, a connection failure due to abnormal termination of the file manager 4, or a simple input / output device. This indicates that the connection is disconnected due to a connection failure due to an abnormality in the communication path between 2 _{1 to} 2 _n and the file manager 4 and the connection process is performed again.

Therefore, in the case of connection processing for the second time or more after activation, a flag is added to the authentication command issued at this time to notify the file manager 4 that the input / output devices 2 ₁ to 2 _n are in a steady state, As a result, the file manager 4 can recognize what kind of connection failure has occurred in the video server system 1.

That file manager 4, if the connection count for himself in the input-output device 2 ₁ to 2 _n is one, recognizes input and output devices 2 ₁ to 2 _n are to be upon restart due to abnormal termination, the time itself When restarting due to abnormal termination, it is recognized that a connection failure has occurred due to abnormal termination of both the input / output devices 2 ₁ to 2 _n and the file manager 4, and if the device itself is in a steady state, the input / output device 2 ₁ It recognizes that the connection failure has occurred due to abnormal termination of ~2 _n.

The file manager 4 recognizes that the input / output devices 2 ₁ to 2 _n are in a steady state when the number of connections to the input / output devices 2 ₁ to 2 _n is two times or more, and then terminates abnormally. If it is restarted by, it is recognized that a connection failure due to its own abnormal termination has occurred, and if it is in a steady state, a connection failure due to an abnormality in the communication path between itself and the input / output devices 2 ₁ to 2 _n Recognize that it occurred.

  Subsequently, the CPU 12 proceeds to step SP13 to determine whether or not the connection with the file manager 4 is completed. If the CPU 12 obtains a negative result in step SP13, it returns to step SP12 and starts the connection process to the file manager 4 again. If it obtains an affirmative result, it proceeds to step SP14, It is determined whether or not there is a restart request.

If a negative result is obtained in step SP14, the CPU 12 returns to step SP11 and waits for detection of disconnection again. If the CPU 12 obtains a positive result, this is because the file manager 4 ended abnormally. This indicates that the restart has been requested, and the process proceeds to step SP15 where the input / output devices 2 ₁ to 2 _n are restarted and the normal operation return processing procedure RT1 (when the input / output devices 2 ₁ to 2 _n are started again) Then, the normal operation return processing procedure RT2 in the steady state is terminated.

  This is the end of the description of the normal operation return processing procedures RT1 and RT2 on the input / output device side.

Next, the normal operation return processing procedure RT3 when the file manager 4 is activated will be described with reference to FIG. When activated, the CPU 20 of the file manager 4 reads the normal operation return processing program from the hard disk 21 and starts the normal operation return processing procedure RT3 in step SP20. In the subsequent step SP21, the input / output devices 2 ₁ to 2 _n Waiting for connection.

Subsequently, the CPU 20 proceeds to step SP22 and determines whether or not the connection with the file manager 4 is completed. The CPU20, when this obtains a negative result in step SP22 the connection process starts for the File Manager 4 again returns to step SP21, obtaining a positive result, the process proceeds to step SP23, input-output device _{2 1} ~ 2 _n authentication. That is, the authentication command issued from the input / output devices 2 _{1 to} 2 _n is analyzed.

Subsequently, the CPU 20 proceeds to step SP24 and determines whether or not a flag is added to the authentication command. If a negative result is obtained in step SP23, this indicates that the input / output devices 2 ₁ to 2 _n are operating normally and the file manager 4 has ended abnormally. At this time, the CPU 20 performs step SP25. proceeds to perform a restart request to the input-output device ₂ 1 to 2 _n, and further returns to step SP21, the connection waiting state again from input-output device ₂ 1 to 2 _n.

On the other hand, if an affirmative result is obtained in step SP24, this indicates that both the file manager 4 and the input / output devices 2 ₁ to 2 _n are starting up, and the CPU 20 proceeds to step SP 26 at this time. Thus, the normal operation return processing procedure RT3 on the file manager side when the file manager 4 is started is terminated.

Here, after completing the normal operation return processing procedure RT3 at the time of startup, the CPU 20 enters a steady state, and proceeds to the normal operation return processing procedure RT4 in the steady state shown in FIG. In practice, when the CPU 20 moves to the steady state, the normal operation return processing procedure RT4 is started in step SP30, and in the subsequent step SP31, the disconnection between the input / output devices 2 ₁ to 2 _n and the file manager 4 is detected. Determine whether or not.

Here, CPU 20, when the heartbeat command from the input-output device 2 ₁ to 2 _n is not transmitted, the connection with the output device 2 ₁ to 2 _n and the file manager 4 is made to recognize that the cut ing.

In step SP31, the CPU 20 waits until an affirmative result is obtained. If the affirmative result is obtained, the CPU 20 recognizes that the connection between the file manager 4 and the input / output devices 2 ₁ to 2 _n has been disconnected, proceeds to step SP32, and again A connection waiting state from the input / output devices 2 _{1 to} 2 _{n is} entered.

Subsequently, the CPU 20 proceeds to step SP33 and determines whether or not the connection with the input / output devices 2 ₁ to 2 _n is completed. If the CPU 20 obtains a negative result in step SP33, it returns to step SP32 and again waits for connection from the input / output devices 2 ₁ to 2 _{n. If} it obtains a positive result, it proceeds to step S34. The input / output devices 2 _{1 to} 2 _n are authenticated. Then, the CPU 20 returns to step SP31 and waits for detection of disconnection again.

This is the end of the description of the normal operation return processing procedures RT3 and RT4 on the file manager side. In practice, the file manager 4 is configured to individually execute the normal operation return process for each of the input / output devices 2 ₁ to 2 _n .

(5) Operation and effect of the present embodiment In the above configuration, in the video server system 1, when A / V data is input to the input / output devices 2 ₁ to 2 _n in the A / V data recording mode. The file manager 4 and the input / output devices 2 ₁ to 2 _n receive file management information of A / V files for recording the A / V data managed by the file manager 4 via the Ethernet (registered trademark) 5. Communicate.

In the video server system 1, based on the file management information, the input / output devices 2 ₁ to 2 _n perform predetermined encoding processing on the input A / V data, Record in the storage 3 as a file.

In the A / V data playback mode, the video server system 1 transmits file management information for A / V files managed by the file manager 4 between the file manager 4 and the input / output devices 2 ₁ to 2 _n via the Ethernet ( A / V data is exchanged via the registered trademark) 5 and the input / output devices 2 ₁ to 2 _n read a predetermined A / V file from the storage 3 based on the file management information and decode it. Convert to and output.

According to the above configuration, in this video server system 1, the file manager 4 connected to the input / output devices 2 ₁ to 2 _n via the Ethernet (registered trademark) 5 stores the A / V file to be recorded in the storage 3. by which is adapted to centrally manage, it is possible to share the a / V files between input and output device 2 ₁ to 2 _n, Ethernet input-output device connected to the 5 2 ₁ to 2 _n Since the number of input / output ports can be increased simply by increasing the number of ports, it can be easily expanded.

In this video server system 1, when a connection failure occurs between the file manager 4 and the input-output device 2 ₁ to 2 _n has a file manager 4 and the input-output device 2 ₁ to 2 _n based on the number of connections, the file manager 4 and the input-output device 2 ₁ to 2 _n between abnormal by the connection failure of the communication channel, input-output devices 2 ₁ to 2 _n of the abnormal termination due to a connection failure, abnormal termination of the file manager 4 It is determined which of the connection failures due to the connection failure due to the connection failure due to the abnormal termination of both the input / output devices 2 ₁ to 2 _n and the file manager 4 has occurred, and the normal operation return processing corresponding to these connection failures is performed. Do.

As described above, in the video server system 1, even if a connection failure occurs between the file manager 4 and the input / output devices 2 ₁ to 2 _n , the failure recovery is performed by performing normal operation return processing according to the connection failure. Thereafter, the file manager 4 and the input / output devices 2 ₁ to 2 _n can be immediately restored to normal operations, so that reliability can be ensured.

Furthermore, in this video server system 1, when the file manager 4 and the input / output devices 2 ₁ to 2 _n are operating normally, file management information is exchanged only when the A / V file is opened and closed. Thus, the load on the Ethernet (registered trademark) 5 can be reduced.

(6) Other Embodiments In the above-described embodiment, as a data input / output control device that controls input / output of A / V data to / from the storage 3 that stores and holds A / V data as A / V files, Although the case where the present invention is applied to the file manager 4 and the input / output devices 2 ₁ to 2 _n connected via the Ethernet (registered trademark) 5 has been described, the present invention is not limited thereto, and various other types are also available. The present invention can be widely applied to file managers and input / output devices that control the input / output of data.

In the above-described embodiment, the case where the file manager 4 and the input / output devices 2 ₁ to 2 _n are connected via the Ethernet (registered trademark) 5 as a network has been described. Not limited to this, the file manager 4 and the input / output devices 2 ₁ to 2 _n may be connected via another network.

Further, in the above-described embodiment, the case where the SRAM 15 is used as the storage unit in order for the input / output devices 2 ₁ to 2 _n to store file management information including duration information as progress information has been described. The present invention is not limited to this, and various other nonvolatile memories such as a flash memory may be used.

Further, in the above-described embodiment, the input / output devices 2 ₁ to 2 _n that record the input A / V data as the A / V file in the storage 3 and read and output the A / V file are shown in FIG. Although the case where it comprised as mentioned above was described, this invention is not restricted to this, Various other structures can be applied widely.

  Furthermore, in the above-described embodiment, the case where the file manager 4 that centrally manages the A / V files recorded in the storage 3 is configured as shown in FIG. 2 is described, but the present invention is not limited to this. However, various other configurations can be widely applied.

  Further, in the above-described embodiment, the case where the storage 3 for storing and holding the A / V file is configured by RAID is described. However, the present invention is not limited to this, and various configurations of the storage 3 are possible. The configuration of can be widely applied.

Further, in the above-described embodiment, the video is recorded by the storage 3 as the memory holding means, the file manager 4 as the normal operation return means and the management means, and the input / output devices 2 ₁ to 2 _n as the normal operation return means and the input / output means. Although the case where the server system 1 is configured has been described, the present invention is not limited to this, and the video server system may be configured by various other storage holding means, management means, and normal operation return means. Good.

  The present invention can be applied to a video server system used in a television broadcasting station.

It is a block diagram which shows the whole structure of the video server system by this Embodiment. It is a block diagram which shows the structure of a file manager and an input / output device. It is a flowchart which shows the normal operation return process sequence at the time of starting of an input / output device. It is a flowchart which shows the normal operation return process sequence at the time of the steady state of an input / output device. It is a flowchart which shows the normal operation return process sequence at the time of starting of a file manager. It is a flowchart which shows the normal operation return process sequence in the steady state of a file manager.

Explanation of symbols

1 ...... video server _system, 2 1 to 2 _n ...... input and output device, 3 ...... storage, 4 ...... file manager, 5 ...... Ethernet, 10 ...... file manager unit, 11 ...... data processing Part, 12, 20... CPU, 15... SRAM.

Claims (4)

In a data input / output control device for controlling input / output of the data to / from an external storage holding means for storing and holding predetermined data as a file,
Management means for centrally managing the file stored and held in the storage holding means by file management information ;
Connected to the management means via a predetermined network, and writes data input from the outside as a file to the storage holding means under the management of the management means, and the file written to the storage holding means to the data As a plurality of input / output means for reading out and outputting to the outside
A normal operation return means for returning the management means and the input / output means to normal operation immediately after the failure recovery when a failure occurs in the connection between the management means and the input / output means ;
The input / output means is
Predetermined information for identifying the portion written or read up to now is used as progress information of the file when writing data to the storage holding unit as a file and when reading the file as data from the storage holding unit. Memorize in a predetermined storage unit,
The normal operation return means is
When the connection between the management means and the input / output means is disconnected due to an abnormality in the network connecting the management means and the input / output means, the management means and the input / output means are immediately connected after the network is restored. By reconnecting, the management means and the input / output means are restored to normal operation,
If the connection between the management means and the input / output means is disconnected due to abnormal termination of the input / output means, immediately after the input / output means is restarted, reconnect the management means and the input / output means, and The progress information of the file stored in the storage unit up to the abnormal end of the input / output means and the close information of the file closed by the input / output means at the abnormal end of the input / output means The management means and the input / output means are returned to normal operation by transmitting the file management information to the management means as a state of
If the management means and the input / output means are disconnected due to abnormal termination of the management means, immediately after the management means is restarted, the management means and the input / output means are reconnected, and the input / output The writing and reading of the data by the means are stopped, the file of the data is closed, and the progress information of the file stored in the storage unit until the stop is set as the current state of the file. The management means and the input / output means to return to normal operation by updating the file management information to the management means,
If the connection is disconnected due to abnormal termination of both the management means and the input / output means, immediately after the restart of the management means and the input / output means, reconnect the management means and the input / output means, By transmitting the progress information of the file stored in the storage unit until the abnormal end of the input / output means to the management means as the current state of the file, and causing the management means to update the file management information, A data input / output control device for returning the management means and the input / output means to normal operation . The normal operation return means is
If the number of connections from the input / output means to the management means is greater than or equal to the second time , the connection has been disconnected due to an abnormality in the network connecting the management means and the input / output means , or a connection has occurred due to an abnormality in the management means There were determined to have been cut, if the connection number of the first, or connected by abnormality of the output means is disconnected, or is connected by abnormal termination of both the management means and said output means cutting To determine
Data output control apparatus according to 請 Motomeko 1. In the data input / output control method in which the data input / output control device controls input / output of the data to / from an external storage holding means for storing and holding predetermined data as a file,
Management of the data input / output control device, wherein a plurality of input / output means of the data input / output control device for inputting / outputting the data centrally manages the files stored in the storage holding means by file management information a first step of connecting via the means and network,
The input / output means writes the data input from the outside to the storage holding means under the management of the management means, and reads the data written to the storage holding means and outputs the data to the outside. Two steps,
The normal operation return means of the data input / output control device returns the management means and the input / output means to normal operation immediately after recovery from the failure when a failure occurs in the connection between the management means and the input / output means. With a third step ,
In the second step,
Predetermined information for identifying the portion written or read up to now is used as progress information of the file when writing data to the storage holding unit as a file and when reading the file as data from the storage holding unit. Memorize in a predetermined storage unit,
In the third step,
When the connection between the management means and the input / output means is disconnected due to an abnormality in the network connecting the management means and the input / output means, the management means and the input / output means are immediately connected after the network is restored. By reconnecting, the management means and the input / output means are restored to normal operation,
If the connection between the management means and the input / output means is disconnected due to abnormal termination of the input / output means, immediately after the input / output means is restarted, reconnect the management means and the input / output means, and The progress information of the file stored in the storage unit up to the abnormal end of the input / output means and the close information of the file closed by the input / output means at the abnormal end of the input / output means To the management means as a state of the above, by causing the management means to update the file management information, to return the management means and the input / output means to normal operation,
If the management means and the input / output means are disconnected due to abnormal termination of the management means, immediately after the management means is restarted, the management means and the input / output means are reconnected, and the input / output The writing and reading of the data by the means are stopped, the file of the data is closed, and the progress information of the file stored in the storage unit until the stop is set as the current state of the file. The management means and the input / output means to return to normal operation by updating the file management information to the management means,
If the connection is disconnected due to abnormal termination of both the management means and the input / output means, immediately after the restart of the management means and the input / output means, reconnect the management means and the input / output means, By transmitting the progress information of the file stored in the storage unit until the abnormal end of the input / output means to the management means as the current state of the file, and causing the management means to update the file management information, A data input / output control method for returning the management means and the input / output means to normal operation . In the third step,
If the number of connections from the input / output means to the management means is greater than or equal to the second time , the connection has been disconnected due to an abnormality in the network connecting the management means and the input / output means , or a connection has occurred due to an abnormality in the management means There were determined to have been cut, if the connection number of the first, or connected by abnormality of the output means is disconnected, or is connected by abnormal termination of both the management means and said output means cutting It is determined that
Data input-output control method according to 請 Motomeko 3.

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