JPH11317059A - System and method for recording/reproducing data and data processing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide system and method for recording/reproducing the data for dispersing a load for accessing a recorder and properly and efficiently inputting/outputting the data with respect to the recorder. SOLUTION: Identification information when the data are recorded in a tape drive device is gained while referring to the information held in a client host 11 based on a file name by an ID information-hard disk positional information conversion processing module 52. Since the identification information (idc) is coded, it is decoded by a decode processing module 53, and recording time information is extracted by a time information separation processing module 55. When the identification information (idc) and the recording time (time) are detected concerning plural data, the identification information (idc) are sorted in old order of the recorded time by a data rearrangement processing module 54. A reproducing request is outputted to a server host 12 so as to reproduce the data in the sorted order.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data recording / reproducing apparatus for recording and reproducing data by sequentially accessing a recording medium such as a tape recorder apparatus for recording and reproducing data. The present invention relates to a recording / reproducing system and a method thereof, and a data processing system for performing desired arithmetic processing using data recorded in such a recording device.

[0002]

2. Description of the Related Art With the advance of data recording technology and recording devices, various recording media and recording devices capable of recording a large amount of data have been developed. In particular, the density of disk-shaped media has been remarkably increasing, and it has been used for various devices including an external storage device of a computer device. On the other hand, a recording device for recording data on a magnetic tape (hereinafter, referred to as a tape recorder device) is inferior to a disk-shaped recording medium due to random access properties, but is recorded per volume in a rewritable recording medium. It is by far the most superior in density, and the cost per bit is two to four orders of magnitude superior to other recording media. Therefore, it still plays an important role in an archive system that records and stores a huge amount of information and a processing system that handles a moving image with a huge amount of data.

[0003] When such a tape recorder performs a process of fetching arbitrary plural data collectively, it is most efficient to access the data in the order of recording. Therefore, when data is read from the tape recorder device, the control device first obtains identification information (hereinafter referred to as ID information) for specifying a plurality of data to be read collectively on the tape medium. Address information indicating the specific data position of
Rearrangement processing for reading data in the recording order is performed based on the context of each piece of address information.

[0004]

However, when data is read by such a method, there is a problem that the load on the host computer to which the tape recorder device is connected increases. In particular, in a network system in which a plurality of computers are connected,
When the computer to which the tape recorder is connected is made to function as a server, and the tape recorder is controlled to input and output data in response to a data transmission request or a data recording request from each client computer, the tape is The load on the computer to which the recorder device is connected is significantly increased. As a result, there is a problem that the responsiveness of input / output of data is deteriorated and the processing capability of the entire network is reduced.

Accordingly, an object of the present invention is to distribute a load for accessing a recording apparatus in a system in which a plurality of processing apparatuses are connected and a recording apparatus sequentially accessed to any of the processing apparatuses is connected. It is another object of the present invention to provide a data recording / reproducing system and a method therefor, which can appropriately and efficiently input / output data to / from the recording device. Another object of the present invention is to distribute a load for accessing a recording apparatus in a system in which a plurality of processing apparatuses are connected and a recording apparatus that is sequentially accessed to any one of the processing apparatuses is connected. Another object of the present invention is to provide a data processing system capable of appropriately and efficiently inputting and outputting data to and from the recording device and improving the processing efficiency of the entire system.

[0006]

In order to solve the above-mentioned problems, even in a processing apparatus to which a recording device is not connected,
Information relating to the data recording order in the recording device can be known, and the processing up to the determination of the access order when accessing a plurality of data is performed in each processing device.

Therefore, a data recording / reproducing system according to the present invention comprises: a recording apparatus for sequentially accessing a recording medium to record and reproduce data; and a first apparatus for recording and reproducing data to and from the recording apparatus. A processing device, and a second processing device connected to the first processing device so as to be able to transfer data, wherein the second processing device includes a part of data recorded in the recording device or A first recording information storage unit for storing first recording information in which logical information specifying each data and information relating to a recording position of the data on the recording medium are associated with each other; Regarding a plurality of data to be reproduced recorded in the recording device, referring to the first recording information,
Reproduction request means for requesting the first processing device to reproduce in the order of recording positions on the recording medium.

In the data recording / reproducing system having such a configuration, when the second processing device needs to access a plurality of data recorded in the recording device, the data is stored in the first recording information storage means. The information of the recording position on the recording medium of each of the plurality of data is extracted with reference to the first information. Then, in the reproduction request means, the recording position is sorted so as to be in the order of access when the recording medium is sequentially and continuously accessed in the same direction in the recording apparatus, and the recording order is transmitted to the first processing apparatus in that order. Request data playback. Therefore, in the first processing device, it is sufficient to simply access the recording device in the order of the input reproduction request and transfer the reproduced data to the second processing device.

Specifically, the information on the recording position stored in the first recording information may be considered as information on the recording time of each data. Therefore, when data is recorded in the first processing device, identification data of the data is generated based on the information of the recording time, and the data is managed in the first processing device by the identification data, What is necessary is just to record data in a recording device. In the second processing device, each data can be managed based on the recording time that can be grasped by itself.

Further, the data recording / reproducing method of the present invention provides a recording apparatus for recording and reproducing data by sequentially accessing a recording medium, and a first apparatus for recording and reproducing data on the recording apparatus. In a data processing system having a processing device and a second processing device connected to the first processing device, a method for recording and reproducing desired data from the second processing device to the recording device. In the second processing device, for part or all of the data recorded in the recording device, logical information specifying each data and information relating to a recording position of the data on the recording medium are provided. The associated first recording information is stored, and the second processing device performs the first processing on the plurality of reproduction target data recorded in the recording device. Referring to recording information, and requests the playback to the first processing device in the order of the recording position on the recording medium,
The first processing device generates data recorded in the recording device in the requested order.

Further, the data processing system of the present invention comprises a recording device for sequentially accessing a recording medium to record and reproduce data, and a first process for recording and reproducing data to and from the recording device. An apparatus, an apparatus connected to the first processing apparatus, an arithmetic processing unit for performing a desired process on a plurality of data recorded in the recording apparatus, and an arithmetic processing unit recorded in the recording apparatus First recording information for storing first recording information in which logical information for specifying each data and information relating to a recording position of the data on the recording medium are associated with a part or all of the data. A storage unit for reproducing the plurality of data to be processed by requesting the first processing apparatus to reproduce the plurality of data to be processed in the order of recording positions on the recording medium with reference to the first recording information; And a second processor having a means.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A data processing system according to an embodiment of the present invention will be described with reference to FIGS.

First, an overall configuration of a data processing system 10 according to the present embodiment will be described with reference to FIG. FIG. 1 shows a data processing system (system) according to the present embodiment.
m) A diagram showing a configuration of No. 10. Data processing system 1
0 has a client host (client) 11, a server host (server) 12, a hard disk drive (hddrv) 13, and a tape drive (tpdrv) 14.

The client host 11 receives, as an input stream, packet data (p
packet 1) and read data (hrdata) from the hard disk drive 13. Also,
The output stream includes packet data (packet 2) to the server host 12, write data (hwdata) to the hard disk drive 13, and a control signal (cnthd).

The server host 12 receives, as an input stream, packet data (p
packet 2 (packet 2) and data (trdata) read from the tape drive device 14, and as an output stream, packet data (p
packet1), write data (twdata) to the tape drive device 14, and a control signal (cn)
ttp).

The hard disk drive 13 has, as an input stream, a control signal (cnthd) from the client host 11 and write data (hwdata) from the hard disk drive 13, and reads out to the client host 11 as an output stream. It has data (hrdata).

The tape drive 14 receives a control signal (cntp) from the server host 12 and write data (twdata) as input streams.
And has read data (trdata) to the server host 12 as an output stream.

Next, the configuration of the client host 11 and the flow of data will be described with reference to FIG. The client host 11 is a terminal input device (stdin)
21. A migration processing unit (migrate) that writes data from the client host 11 to the server host 12
e) 22, a reloading unit (reload) 2 for reading data from the server host 12 to the client host 11
3, a functional module group including a hard disk controller (hdrvcnt) 24 for the hard disk drive device 13 and a terminal output device 25 for notifying a user of the processing results of the migration processing unit 22 and the reload processing unit 23.

The terminal input device 12 outputs a migration processing section 22 and a reload processing section 23 as output streams.
Command designation information (command) and a file name (fname). Command specification information (co
mmand) and the file name (fname) are output as a set. Command designation information (command)
In the content of “”, either “migrate” or “reload” is specified.

The migration processing unit 22 receives command designation information (command) and file name (fname) from the terminal input device 12 as input streams.
And read data (hrdata) from the hard disk drive 13 and packet data (packet1) from the server host 12. As an output stream, a read / write direction designation (rw) to the hard disk controller 24 and a file position on the hard disk It has information (inode) and packet data (packet2) to the server host 12. The configuration and operation of the migration processing unit 22 will be described later in detail.

The reload processing unit 23 receives command designation information (co
mmand), a file name (fname), and packet data (packet1) from the server host 12.
And write data (hwdata) to the hard disk drive 13 as an output stream;
It has a read / write direction designation (rw) to the hard disk controller 24, file position information (inode) on the hard disk, and packet data (packet2) to the server host 12. The configuration and operation of the reload processing unit 23 will also be described later in detail.

The terminal output unit 25 receives the input stream as the migration processing unit 22 and the reload processing unit 23.
From the processing result (msg).

Next, the configuration of the server host 12 and the flow of data will be described with reference to FIG. The server host 12 includes an API process identification processing unit (api) 3
1. Write processing unit (pu
tdata) 32, a read processing unit (getdata) 33 from the tape drive device 14, and a tape drive controller (tapedrvcnt) 34.

The API process identification processing section 31 has, as an input stream, packet data (packet 2) from the client host 11, and as an output stream, API operation function designation information (to the write processing section 32 and the read processing section 33). apicom).
Either “migrate” or “reload” is specified in the content of the API operation function specification information (apicom).

The write processing unit 32 has, as input streams, API operation function designation information (apicom) from the API process identification processing unit 31 and packet data (packet 2) from the client host 11.
As output streams, packet data (packet 1) to the client host 11, write data (twdata) to the tape drive device 14, file position information (addr) on the tape to the tape drive controller 34, and read / write direction designation (rw) are specified. Have.

The read processing unit 33 reads, as input streams, API operation function designation information (apicom) from the API process identification processing unit 31, packet data (packet 2) from the client host 11, and read from the tape drive device 14. Data (trdat
a), and as an output stream, packet data (packet 1) to the client host 11, file position information (addr) on the tape to the tape drive controller 34, and read / write direction designation (rw).

The tape drive controller 34 receives, as an input stream, file position information (add) on the tape from the write processing unit 32 and the read processing unit 33.
r) and a read / write direction designation (rw), and a control signal (cntp) to the tape drive device 14 as an output stream.

Next, the migration processing section 22 of the client host 11 will be described in detail with reference to FIG. The migration processing unit 22 outputs the command designation information (c
Ommand) When “migrate” is detected in the input stream, the file name-to-disk position information conversion processing module (ftoi) 41, the time generation processing module (clock) 42, the host ID generation processing module (gethostid) 43, and the ID information mixed Processing module (merge) 44, encryption processing module (ch)
aper) 45, a packet generation processing module (mak)
(Epacket) 46, a packet identification processing module (openpacket) 47, a data reading request processing module (readhd) 48, a data reading request processing module 48, and a packet matching processing module (compare) 49.

Although not shown, if the migration process is successful, the client transmits map information indicating that migration has been completed and identification information (id) corresponding to file position information (inode) on the hard disk. It is held on the host 11.

Upon input of the file name (fname), the file name / disk position information conversion processing module 41 outputs file position information (inode) uniquely determined in the hard disk drive 13 to the hard disk controller 24.

The time generation processing module 42 outputs data writing time information (time) to the ID information mixing processing module 44. This is done with minimal time-resolved performance manageable by the system, ie, for example, in microseconds.

The host ID generation processing module 43 outputs to the ID information mixing processing module 44 host identification information (hid), which is the only identification information that enables the client host 11 to be distinguished from any other host.

The ID information mixing processing module 44 writes the write time information (time) output from the time generation processing module 42 and the host ID generation processing module 43
, And always outputs fixed-length identification information (mid) to the encryption processing module 45.

The encryption processing module 45 encrypts the write time information (time) and the host identification information (hid) included in the identification information (mid) so as to conceal them, and converts the encrypted identification information (id). Packet generation processing module 46 and packet matching processing module 4
9 is output.

The packet generation module 46 includes command designation information (command), data read from the hard disk drive 13 (hrdata),
An information group composed of identification information (id) is packetized including a protocol necessary for communication, and is output to the server host 12 as packet data (packet2).

The packet identification processing module 47 outputs the packet data (packet) output to the server host 12.
The processing result (response information) of 2) is received as packet data (packet 1) from the server host 12, the contents are extracted, and output to the packet matching processing module 49 as identification information (id2).

The packet matching processing module 49 compares the identification information (id) with the identification information (id2), verifies the processing result from the server host 12, and uses the result as a processing result notification (msg). Output to the output device 25.

Data read request processing module 48
Indicates to the hard disk controller 24 that the data is in the read direction (read / write direction designation (rw)).
To instruct.

Next, the reload processing section 23 of the client host 11 will be described in detail with reference to FIG. The processing of the reload processing unit 23 is based on the command designation information (com
mand) When “reload” is detected in the input stream, a file name-to-disk position information conversion processing module (ftoi) 51, an ID information-to-hard disk position information conversion processing module (convert1) 52,
Decryption processing module (decode) 53, data rearrangement processing module (sort) 54, time information separation processing module (gettime) 55, data write request processing module (writed) 56 to hard disk drive 13, packet generation processing module (makepacket) ) 57, a functional module group including a packet identification processing module (openpacket) 58 and a packet matching processing module (compare) 59 is started. Note that the reload processing unit 23 handles a plurality of files at once.

Upon input of the file name (fname), the file name / disk position information conversion processing module 51 outputs file position information (inode) uniquely determined in the hard disk drive 13 to the hard disk controller 24.

The ID information-to-hard disk position information conversion processing module 52 refers to the map information held inside the client host 11 and outputs the file name-to-hard disk file position information output from the file name-to-disk position information conversion processing module 51. (Inode) and outputs identification information (idc). The identification information (idc) includes a plurality of pieces of file position information (inode).
A set is formed by a plurality of pieces of identification information (idc) for.

Since the identification information (idc) input from the ID information / hard disk position information conversion processing module 52 has been encrypted, the decryption processing module 53 executes the decryption processing, and the resulting identification information (idc). id
s) to the time information separation processing module 55. This identification information (ids) also forms a set with a plurality.

The time information separation processing module 55 identifies the identification information (id
Since time information is included in s), the time information is separated and taken out, and is output to the data rearrangement processing module 54 as write time information (time). This writing time information (time) also forms a set by a plurality.

Based on the experience that data having identification information with an earlier write time will be recorded in an earlier area of the tape, the data rearrangement processing module 54 converts the ID information to the hard disk position information based on the experience. The identification information (idc) input from the time information separation processing module 55
The information is rearranged in descending order of time on the basis of (im), and is output as identification information (id). This identification information (id) also forms a set by a plurality.

The packet generation processing module 57 packetizes an information group composed of command designation information (command) and identification information (id), including a protocol necessary for communication, and converts it into packet data (packet 2). Output to

The packet identification processing module 58 outputs the packet data (packet) output to the server host 12.
The processing result (response information) of 2) is transferred to the packet data (pa
packet1), and the identification information (id2) of the content
And outputs it to the packet matching module 59.

The packet matching processing module 59 compares the identification information (id2) with the identification information (id), verifies the processing result from the server host 12 side, and uses the result as a processing result notification (msg). Output to the output device 25.

Data write request processing module 56
Instructs the hard disk controller 24 to read / write direction designation (rw) that the data is in the writing direction.

Although not shown, if the reload process is successful, the reload has been completed and the identification information (i) corresponding to the file position information (inode) on the hard disk.
d) is retained on the client host 11.

Next, the write processing section 32 of the server host 12 will be described in detail with reference to FIG. The processing of the write processing unit 32 is performed by using API operation function designation information (ap
icom) When “migrate” is detected in the input stream, the ID information to tape position information conversion processing module (convert2) 61 and the tape drive device 1
Request processing module (writet
p) 62, packet identification processing module (openpa)
packet) 63, a packet generation processing module (mak)
(Epacket) 64 is started.

Although not shown, the server host 12 sends the identification information (id) to the corresponding file position information (addr) on the tape when the data writing to the tape drive device 14 is successful. Holds map information for conversion.

The ID information-to-tape position information conversion module 61 refers to the map information inside the server host 12 and responds to the new identification information (id) from the packet identification processing module 63 with the file on the new tape. Output position information (addr).

The write request processing module 62 instructs the tape drive controller 34 that the data is in the writing direction.

The packet generation processing module 64
An information group including I operation function designation information (apicom) and identification information (id) input from the packet identification processing module 63 is packetized including a protocol necessary for communication, and is converted into packet data (packet1) on the client host 11. Output to

The packet identification processing module 63 receives the processing content input from the client host 11 as packet data (packet 2), extracts the content, and converts the identification information (id) into the ID information to tape position information conversion processing module 61 and the packet The write data (twdata) is output to the generation processing module 64 to the tape drive device 14.

Next, the read processing section 33 of the server host 12 will be described in detail with reference to FIG. The processing of the read processing unit 33 is performed by using API operation function designation information (api
com) When “reload” is detected in the input stream, the ID information to hard disk position information conversion processing module (convert1) 71 and the read request processing (readtp) 7 to the tape drive device 14
2. Packet identification processing module (openpacke)
t) 73, a packet generation processing module (makepa)
(i.e., a functional module group composed of a ticket 74).

The ID information-to-hard disk position information conversion processing module 71 refers to the map information inside the server host 12, and responds to the new identification information (id) from the packet identification processing module 73 with the new file position on the tape. The information (addr) is extracted and output.

The read request process 72 instructs the tape drive controller 34 that the data is in the read direction.

The packet generation processing module 74
I. Operation function specification information (apicom), read data (trdata), information group consisting of identification information (id) is packetized including a protocol necessary for communication,
The data is output to the client host 11 as packet data (packet 1).

The packet identification processing module 73 outputs the packet data (p
packet2), retrieves the identification information (id), and outputs it to the ID information / hard disk position information conversion processing module 71 and the packet generation processing module 74.

Next, the operation of the migration processing for recording desired data from the client host 11 to the tape drive device 14 connected to the server host 12 in the data processing system 10 having such a configuration will be described. First, the terminal input device 2 of the client host 11
From step 1, a command to perform the migration process and the file name of the data currently recorded in the hard disk drive 13 and transferred to the tape drive 14 as data and recorded are input. Then, this command (com
The file name (mand) and the file name (fname) are applied to the migration processing unit 22.

In the migration processing section 22, the file name (fname) is converted into the file position information (inod) on the hard disk drive 13 by the file name / disk position information conversion processing module 41.
e) and input to the hard disk controller 24 together with the data rw for instructing reading. Thus, the hard disk controller 24 accesses the hard disk drive 13 to read out desired data and input the data to the packet generation processing module 46 of the migration processing unit 22.

On the other hand, almost at the same time as the migration processing instruction, the time generation processing module 42 generates time information (time), and the host ID generation processing module 43 generates the host ID (hi) of the client host 11.
d) is obtained, and these are mixed by the ID information mixing processing module 44 to generate fixed-length identification information (mid), which is encrypted by the encryption processing module 45 to encrypt the encrypted identification information (id). Generate

The data (hrdata) read from the hard disk drive 13 and the encrypted identification information (id) generated by the encryption processing module 45 are transmitted to the packet generation processing module 46 by the packet generation processing module 46. The data is converted into a transfer data pack and output to the server host 12 as packet data (packet 2).

In the server host 12, the packet is received by the packet identification processing module 63, decomposed, and the identification information (id) is written to the ID information / tape position information conversion processing module 61 and the packet generation processing module 64. (Twdata) is output to the tape drive device 14. Based on the identification information (id), the ID information to tape position information conversion processing module 61 refers to the map information inside the server host 12 and
The data recording position of the tape drive device 14 is determined and output to the tape drive controller 34 as file position information (addr). Further, the write request processing module 62 instructs the tape drive controller 34 that the data is in the writing direction.

Then, under the control of the tape drive controller 34, file position information (ad
At the position indicated by dr), the write data (twdata) input from the packet generation processing module 64 to the tape drive 14 is sequentially recorded.

Information relating to the result of these recording processes is as follows:
The packet is processed by the packet generation processing module 64 and output to the client host 11 as packet data (packet 1). The packet identification processing module 47 of the migration processing unit 22 of the client host 11
Receives this processing result (response information), extracts the content, and outputs it to the packet matching processing module 49 as identification information (id2). Then, the packet matching processing module 49 verifies the processing result notified from the server host 12 side by comparing with the original identification information (id) generated by the encryption processing module 45, and notifies the processing result of the processing result. (Msg) to the terminal output device 25. Processing for recording data on the tape drive device 14, that is,
The migration process is performed in this manner.

Next, the operation of the data processing system 10 having such a configuration when performing a reload process for reproducing desired data from the tape drive device 14 connected to the server host 12 from the client host 11 will be described. First, from the terminal input device 21 of the client host 11, a command for performing a reload process and a file name indicating a file name in the hard disk drive device 13 and indicating data recorded in the tape drive device 14 are input. Then, this command (co
mmand) and the file name (fname) are applied to the reload processing unit 23.

Then, in the reload processing section 23,
File name to disk position information conversion processing module 51
Then, the file name (fname) is converted into file position information (inode) on the hard disk drive 13. The file position information (inode) is output to the hard disk controller 24 for determining the recording position of the reproduced data.

On the other hand, the file position information (inod
Based on e), the ID information to hard disk position information conversion processing module 52 refers to the map information held in the client host 11 and generates the data to be reproduced when the data to be reproduced is recorded on the tape drive device 14. Obtain identification information (idc). Since the obtained identification information (idc) is encrypted, the decryption processing module 53 performs decryption processing, and applies the time information separation processing module 5 to the decrypted identification information (ids).
In step 5, information on the recording time is extracted.

When such identification information (idc) and its recording time (time) are detected for a plurality of data, the data rearrangement processing module 54 replaces the identification information (idc) with the oldest recording time. Sort in order. Then, the plurality of pieces of identification information (id) are packetized by the packet generation processing module 57 and output to the server host 12 in the sorted order.

In the server host 12, the packet identification processing module 73 receives the packet data (packet2) input from the client host 11, and sequentially extracts identification information (id). Then, the ID information-to-hard disk position information conversion processing module 71 refers to the map information inside the server host 12 and refers to the file position information (addr) on the tape of the tape drive device 14 for the data corresponding to the identification information (id). ) Are sequentially extracted and output to the tape drive controller 34. The read request processing module 72 instructs the tape drive controller 34 to read data.

As a result, the tape drive 14 is accessed, and the reproduced data is input to the packet generation processing module 74 of the read processing unit 33. As described above, this reproduction processing is sequentially performed on a plurality of data corresponding to a plurality of pieces of identification information. Since these plurality of data are specified in the order of the oldest recording time, the tape drive 14 What is necessary is just to select and play back a file as needed while advancing the tape in a predetermined direction, and it is possible to perform playback at high speed and efficiently.

The reproduced data is packetized by the packet generation processing module 74 together with other information, and output to the client host 11 as packet data (packet 1). On the client host 11,
The packet is received by the packet identification processing module 58, depacked, and the identification information is output to the packet matching processing module 59, and the reproduced data is output to the hard disk drive 13. The data output to the hard disk drive 13 is transmitted to the hard disk controller 24
According to the control of the hard disk drive 13
Will be recorded. The packet matching processing module 59
Is compared with the identification information (id) generated by the data rearrangement processing module 54, the processing result in the server host 12 is verified, and the result is used as a processing result notification (msg). Output to the terminal output device 25. In this way, data is reproduced from the tape drive device 14.

As described above, in the data processing system 10 of the present embodiment, the data requesting side issues a reproduction request in an order that is conscious of the recording order. And data transfer and data processing can be performed efficiently. Also, as a method, since the ID information itself includes information that allows the data requester to determine the access order, complicated inquiry processing between the data requester and the side having the sequential storage device is not required. The reproduction order can be determined efficiently. In addition, since the requester of each data can independently determine the access order, it is possible to further reduce the load on the sequential storage device on which requests are concentrated and the consumption of the main storage area associated therewith. it can. Further, even if the recording time information is stored in the ID information, it is hidden by encryption, so that the confidentiality of the data is maintained.

[0076]

As described above, according to the present invention,
In a system in which a plurality of processing devices are connected and a recording device that is sequentially accessed by any one of the processing devices is connected, a load for accessing the recording device is distributed, and data input / output to / from the recording device is performed. A data recording / reproducing system and a method thereof that can be performed appropriately and efficiently can be provided. Further, in a system in which a plurality of processing devices are connected and a recording device that is sequentially accessed to any one of the processing devices is connected, a load for accessing the recording device is dispersed, and input of data to the recording device is performed. It is possible to provide a data processing system capable of performing output appropriately and efficiently and improving the processing efficiency of the entire system.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of a data processing system according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a configuration of a client host of the data processing system illustrated in FIG. 1;

FIG. 3 is a diagram illustrating a configuration of a server host of the data processing system illustrated in FIG. 1;

FIG. 4 is a diagram for explaining an operation of a migration processing unit of the client host shown in FIG. 2;

FIG. 5 is a diagram for explaining an operation of a reload processing unit of the client host shown in FIG. 2;

FIG. 6 is a diagram for explaining an operation of a write processing unit of the server host shown in FIG. 3;

FIG. 7 is a diagram for explaining an operation of a read processing unit of the server host shown in FIG. 3;

[Explanation of symbols]

Reference Signs List 10 data processing system, 11 client host, 12 server host, 13 hard disk drive device, 14 tape drive device, 21 terminal input device, 22 migration processing unit, 23 reload processing unit, 24 hard disk Controller 25 25 Terminal output device 31 API process identification processing unit 32 Write processing unit 33 Read processing unit 34 Tape drive controller 41 File name-to-disk position information conversion processing module 42 Time generation Processing module, 43: Host ID generation processing module, 44: ID
Information mixing processing module, 45: encryption processing module, 46: packet generation processing module, 47: packet identification processing module, 48: data read request processing module, 49: packet matching processing module, 51
… File name to disk position information conversion module
52: ID information to hard disk position information conversion processing module, 53: decryption processing module, 54: data rearrangement processing module, 55: time information separation processing module, 56: data write request processing module, 5
7: packet generation processing module, 58: packet identification processing module, 59: packet matching processing module,
61 ... ID information to tape position information conversion processing module
62: write request processing module, 63: packet identification processing module, 64: packet generation processing module

Claims (22)

[Claims] 1. A recording device for sequentially accessing a recording medium to record and reproduce data, a first processing device for recording and reproducing data to and from the recording device, and a first process An apparatus connected so as to be able to transfer data with the apparatus, and for part or all of data recorded in the recording apparatus, logical information specifying each data and recording of the data on the recording medium First recording information storage means for storing first recording information associated with position-related information; and the first recording information for a plurality of reproduction target data recorded in the recording device. And a second processing device having a reproduction requesting means for requesting the first processing device to reproduce in the order of recording positions on the recording medium. 2. The information processing apparatus according to claim 1, wherein the first recording information storage means stores, for a part or all of the data recorded in the recording device, information relating to a recording time of the data and information relating to a recording position on the recording medium. And stores the information in association with the logical information. The reproduction request unit refers to the first recording information,
2. The data recording / reproducing system according to claim 1, wherein a request is made to the first processing device for reproduction such that recording times of the plurality of data to be reproduced are in a predetermined order. 3. The first recording information storage means includes, for a part or all of the data recorded in the recording device, a predetermined information capable of identifying the data including the information relating to the recording time of the data. The identification data is stored in association with the logical information, and the reproduction request unit refers to the first recording information,
The identification data of the plurality of data to be reproduced is transmitted to the first processing device in a predetermined order, and a request is made to reproduce each of the data in the predetermined order. For each piece of data recorded in the recording device, the predetermined identification data that includes information related to the recording time of the data and that can identify the data is associated with the address information of the data on the recording medium. A second recording information storage unit that stores second recording information; and a second recording information storage unit that stores the second recording information based on the identification data of the plurality of reproduction target data transmitted in the predetermined order from the reproduction request unit of the second processing device. With reference to the second record information,
Address detecting means for sequentially detecting address information of the data on the recording medium; and sequentially accessing the recording device based on the sequentially detected address information, and sequentially reproducing the plurality of data to be reproduced. The data recording / reproducing system according to claim 2, further comprising: a data reproducing unit; and a transmitting unit that sequentially transmits the plurality of sequentially reproduced data to the second processing device. 4. An identification data generating means for generating, with respect to data to be recorded, information on a predetermined recording time and generating the predetermined identification data capable of identifying the data, Transmitting means for transmitting the data to be recorded and the generated identification data to the first processing device so as to record the data on the recording medium; and the first processing device of the second processing device. The record information storage means,
The logical information specifying the data to be recorded and the generated identification data are stored in association with each other, and the first processing device transmits the data to be recorded transmitted from the first processing device, The apparatus further includes a data recording unit that records on the recording device, wherein the second recording information storage unit of the first processing device includes:
4. The data recording / reproducing system according to claim 3, wherein the transmitted identification data of the recorded data is stored in association with address information of the data on the recording medium. 5. The identification data generating means, based on a recording time of the data to be recorded and predetermined identification data for specifying the second processing device, generates predetermined identification data for specifying the data. The data recording / reproducing system according to claim 4, which generates the data. 6. The identification data generating means further includes an encryption means for encrypting predetermined data having the data of the recording time and predetermined identification data for specifying the second processing device. The data recording / reproducing system according to claim 5, wherein the encrypted data is generated as identification data for specifying the data to be recorded. 7. The reproduction request means, wherein predetermined data having data of a recording time of data to be reproduced, obtained by referring to the first recording information, is encrypted. Decoding means for decoding identification data; time data extracting means for extracting data of the recording time from the decoded predetermined data; and time data extracting means for extracting a plurality of data to be reproduced. Sorting means for sorting data and determining a reproduction order of the plurality of data to be reproduced so that a recording time is in a predetermined order, wherein the first data is reproduced in the determined order. 7. The data recording / reproducing system according to claim 6, wherein a request is made to a processing device to reproduce the plurality of data. 8. The data recording / reproducing system according to claim 7, wherein said storage medium is a tape-shaped recording medium, and said recording device is a tape recorder device. 9. A recording apparatus for recording and reproducing data by sequentially accessing a recording medium sequentially, a first processing apparatus for recording and reproducing data to and from the recording apparatus, and a first processing apparatus A data processing system having a second processing device connected to the device;
A method for recording and reproducing desired data from the processing device to the recording device, wherein the second processing device specifies each data for a part or all of the data recorded in the recording device. Storing first recording information in which logical information to be associated with information relating to a recording position of the data on the recording medium is stored, and the second processing device records the first recording information in the recording device. With respect to a plurality of data to be reproduced, the first recording information is referred to in order of recording positions on the recording medium.
A data recording / reproducing method, wherein the first processing device generates data recorded in the recording device in the requested order. 10. The first recording information is, for part or all of data recorded in the recording device, information relating to a recording time of the data as information relating to a recording position on the recording medium. The information associated with the logical information, wherein the request for reproduction is performed with reference to the first recording information such that recording times of the plurality of data to be reproduced are in a predetermined order. 10. The data recording / reproducing method according to item 9. 11. The first recording information includes, for a part or all of data recorded in the recording device, predetermined identification data capable of identifying the data including the information relating to the recording time of the data. Is information associated with the logical information as information related to a recording position on the recording medium. The reproduction request refers to the first recording information, This is performed by transmitting the identification data to the first processing device in the order of reproduction. The first processing device includes, for each piece of data recorded in the recording device, information on a recording time of the data. And stores second recording information in which the predetermined identification data capable of identifying the data and address information of the data on the recording medium are associated with each other. Based on the identification data transmitted in the order of reproduction from the physical device, referring to the second recording information, sequentially detecting the address information of the respective data on the recording medium, The method according to claim 10, wherein the recording device is sequentially accessed based on the address information, the plurality of data to be reproduced is sequentially reproduced, and the plurality of sequentially reproduced data is sequentially transmitted to the second processing device. Data recording and reproduction method. 12. The recording apparatus according to claim 2, further comprising: generating, for the data to be recorded, said predetermined identification data including information relating to a predetermined recording time and identifying said data. And storing the generated identification data in association with the logical information specifying the identification information as the first recording information, and transmitting the data to be recorded and the generated identification data to the first processing device. In the first processing device, the data to be recorded transmitted from the first processing device is recorded in the recording device, and the transmitted identification data of the recorded data, 12. The second recording information is stored in association with address information on the recording medium.
The data recording / reproducing method described in 1. 13. The data recording / reproducing apparatus according to claim 12, wherein the identification data is generated based on a recording time of the data to be recorded and predetermined identification data specifying the second processing device. Method. 14. The data according to claim 13, wherein said identification data is generated by encrypting predetermined data having said recording time data and predetermined identification data specifying said second processing device. Recording and playback method. 15. The reproduction request is obtained by encrypting predetermined data having recording time data of reproduction target data obtained by referring to the first recording information. Decoding the identification data, extracting the data of the recording time from the decoded predetermined data, and extracting the data of the extracted recording time for a plurality of data to be reproduced in a predetermined order of the recording time. 15. The data recording / reproducing method according to claim 14, wherein sorting is performed so as to be performed on the first processing device so that the data is reproduced in the sorted order. 16. The storage medium is a tape-shaped recording medium, and the recording device is a tape recorder.
The data recording / reproducing method described in 1. 17. A recording device for sequentially accessing a recording medium to record and reproduce data, a first processing device for recording and reproducing data to and from the recording device, and a first process A device connected to the device, an arithmetic processing unit that performs a desired process on a plurality of data recorded in the recording device, and a part or all of the data recorded in the recording device, First recording information storage means for storing first recording information in which logical information specifying each data and information relating to a recording position of the data on the recording medium are associated with each other; Reproduction processing means for requesting reproduction of the first processing apparatus in the order of recording positions on the recording medium with reference to the first recording information for a plurality of data; A data processing system having a. 18. A method according to claim 18, wherein said first recording information storage means includes, for a part or all of the data recorded in said recording device, said predetermined information including said information relating to a recording time of said data and capable of identifying said data. The identification data is stored in association with the logical information, and the reproduction request unit refers to the first recording information,
The identification data of the plurality of data to be reproduced is transmitted to the first processing device in a predetermined order, and a request is made to reproduce each of the data in the predetermined order. For each piece of data recorded in the recording device, the predetermined identification data that includes information related to the recording time of the data and that can identify the data is associated with the address information of the data on the recording medium. A second recording information storage unit that stores second recording information; and a second recording information storage unit that stores, based on the identification data of the plurality of data to be reproduced, transmitted in the predetermined order from the reproduction requesting unit of the second processing device With reference to the second record information,
Address detecting means for sequentially detecting address information of the data on the recording medium; and sequentially accessing the recording device based on the sequentially detected address information, and sequentially reproducing the plurality of data to be reproduced. The data processing system according to claim 17, further comprising: a data reproducing unit; and a transmitting unit configured to sequentially transmit the plurality of sequentially reproduced data to the second processing device. 19. An identification data generating means for generating, for data to be recorded, said predetermined identification data including information relating to a predetermined recording time and capable of identifying said data, Transmitting means for transmitting the data to be recorded and the generated identification data to the first processing device so as to record the data on the recording medium; and the first processing device of the second processing device. The record information storage means,
The logical information specifying the data to be recorded and the generated identification data are stored in association with each other, and the first processing device transmits the data to be recorded transmitted from the first processing device, The apparatus further includes a data recording unit that records on the recording device, wherein the second recording information storage unit of the first processing device includes:
19. The data processing system according to claim 18, wherein the transmitted identification data of the recorded data is stored in association with address information of the data on the recording medium. 20. The identification data generating means, based on a recording time of the data to be recorded and predetermined identification data for specifying the second processing device, generates predetermined identification data for specifying the data. 20. The data processing system according to claim 19, wherein the data is generated. 21. Time data for extracting the data of the recording time from predetermined data having the data of the recording time of the data to be reproduced, obtained by referring to the first recording information. Extracting means for sorting the data of the extracted recording time with respect to a plurality of data to be reproduced, and determining a reproduction order of the plurality of data to be reproduced so that the recording time is in a predetermined order. 21. The data processing system according to claim 20, further comprising: means for requesting the first processing device to reproduce the plurality of data so that the data is reproduced in the determined order. 22. The recording medium according to claim 21, wherein the storage medium is a tape-shaped recording medium, and the recording device is a tape recorder.
A data processing system according to claim 1.