JPH0784850A - Directory name checking device for decentralized database system - Google Patents

Abstract

PURPOSE:To shorten the comparing process time of a center by comparing not a directory name, but a number code which is less in the number of bits than it. CONSTITUTION:The center 2 holds reference directory groups 200-1 to 200-m to be compared with directory groups 100 of databases 101 of computers 1-1 to 1-m. A means 203 assigns unique number codes of small-number-bit constitution by directory names present in the reference directory groups 200-1 to 200-m, registers them in a dictionary 201 corresponding to the directory names, and also registers them in standard reference tables 202-1 to 202-m. The respective computers 1-1 to 1-m have the same dictionaries 102, and a table converting means 103 converts the directory names included in the directory groups 100 into number codes by referring to the dictionaries 102 and registers them in comparsion reference tables 104. A structure check on the directory groups 100 is made by comparing and collating the number codes on the basis of the comparison reference tables 104 and standard reference table 202-1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a directory name checking device for a distributed database system, and more specifically, it manages the names of directories included in a directory group of databases existing on each distributed computer and a centralized management at a center. The present invention relates to a directory name check device of a distributed database system that converts the names of directories included in a standard directory group that have been created into numerical codes and compares and collates them.

[0002]

In a distributed database system in which databases on a plurality of geographically or logically distributed distributed computers are connected by a network,
If any component of the database on each distributed computer is missing, it will cause a great deal of trouble to users.

Therefore, it is important to check whether or not the constituent elements of the database on each distributed computer have the desired constituent elements, but it is realistic to carefully check all the constituent elements. Not.

Therefore, as a simple method for checking the lack of constituent elements of the database, a method for checking the directory name in the database of each distributed computer has been considered. In other words, since the directory in the database has a role of a registry for managing files, by checking whether or not a predetermined directory name exists, it is possible to check to some extent a missing component of the database. Because.

In order to check such a directory name, a method as shown in FIG. 15 has been considered.

In FIG. 15, reference numeral 1000 denotes one distributed computer constituting a distributed database system, which is a database 100 including a directory group 1001.
3 exists, and a search unit 1002 for searching a directory name from this directory group 1001 is provided.
2000 is a center communicatively connected to the distributed computer 1000.
Reference directory group 2 indicating the desired directory group of
001 is held and this directory group 2001
There is provided a search unit 2002 for searching the directory name from the, and a comparison unit 2003 for comparing and collating the directory names. Although not shown, there are other distributed computers, and the center 2000 also holds a reference directory group indicating those desirable directory groups.

When checking the name of each directory included in the directory group 1001 of the distributed computer 1000, the comparison unit 2003 of the center 2000 uses the search unit 2002 and the search unit 1002 of the distributed computer 1000.
In response to the request, a directory group search is requested, the directory names searched by both search units 2002 and 1002 are received, and the directory names in the directory group 1001 are detected by comparing and collating.
The names of directories included in the directories of other distributed computers are also checked in the same manner.

[0008]

According to the method as described above, it is possible to collectively check the names of directories included in the directory group on each distributed computer at the center. However, since the directory name is often composed of about 60 to 100 characters, if the directory names are directly compared and collated, in the case of a large-scale database system with a large number of directories, the comparison time at the center becomes enormous. There was a problem.

The present invention has been proposed in view of the above circumstances, and an object thereof is to convert a directory name into a numerical code having a smaller number of bits and compare directory names with numerical codes. The process is performed so that the center can check the directory name at high speed.

[0010]

In order to achieve the above object, the present invention adopts the following constitution (A) or (B).

(A) In a directory name checking device of a distributed database system for checking the name of each directory included in a database directory group in each distributed computer on the distributed database system, a center connected to each distributed computer so as to be communicable Shows a desirable directory group structure on the distributed computer, a standard directory group corresponding to each distributed computer, a standard reference table corresponding to each distributed computer, a directory name, and a number of bits sufficiently smaller than the number of bits constituting the directory name. A numeric code dictionary holding a correspondence relationship with a unique numeric code, and by referring to the numeric code dictionary, the name of each directory included in the reference directory group corresponding to each distributed computer is converted into a numeric code, Initial registration means for registering in the standard reference table corresponding to the distributed computer, table collection means for collecting the comparison reference table from each distributed computer, and numbers included in the comparison reference table of each distributed computer collected by the table collection means. Each of the distributed computers and each of the centers are provided with a table comparison means for comparing the code with the numerical code included in the corresponding reference reference table, and a comparison control means for outputting the comparison result by the table comparison means from the output device. A numeric code dictionary that is the same as the provided numeric code dictionary, a comparison reference table that is compatible with the self-distributed computer, and the numeric code dictionary is used to refer to the name of the directory included in the directory group of the database in the self-distributed computer as the numeric code. To the comparison reference table Arrangement comprising a table conversion means for recording, and a table transmitting means for transmitting the comparison reference table in response to a request from the center to the center.

(B) In the directory name checking device of the distributed database system for checking the name of each directory included in the directory group of the database in each distributed computer on the distributed database system, a center connected to each distributed computer so as to communicate with each other. Shows a desirable directory group structure on the distributed computer, a standard directory group corresponding to each distributed computer, a standard reference table corresponding to each distributed computer, a directory name, and a number of bits sufficiently smaller than the number of bits constituting the directory name. A numeric code dictionary that holds a correspondence relationship with a unique numeric code, and by requiring initial registration, a unique numeric code for the name of the directory included in the reference directory group corresponding to each distributed computer Numbering is performed and the set of directory name and number code is registered in the number code dictionary, and the number code assigned to the directory name included in the reference directory group corresponding to each distributed computer is applied to each distributed computer. Initial registration means for registering in the standard reference table, and deleting, adding, or renaming a directory name for the standard directory group, deleting, adding a numeric code registered in the corresponding standard reference table,
Dynamic registration means for making changes and modifying the numeric code dictionary as necessary, contents of the numeric code dictionary registered by the initial registration means, and the numeric code dictionary modified by the dynamic registration means Distribution means for distributing the changed contents of each distributed computer to each distributed computer, table collection means for collecting a comparison reference table from each distributed computer at fixed time intervals, and comparison reference table of each distributed computer collected by the table collection means Each of the distributed computers is provided with a table comparing means for comparing the numerical code included in the corresponding numerical reference code with the numerical code included in the corresponding reference reference table, and a comparison control means for outputting the comparison result by the table comparing means from the output device. , The numeric code dictionary and the numeric code dictionary distributed from the center to the numeric code dictionary. And a dictionary registration means for reflecting the delivered changes registers the contents, and comparing the reference table,
Table conversion means for converting the name of the directory included in the directory group of the database in the self-distributed computer into a numerical code by referring to the numerical code dictionary and registering it in the comparison reference table, and transmitting the comparison reference table from the center And a table transmitting means for transmitting the comparison reference table in which the numerical code is registered to the center by the activated table converting means.

[0013]

In the directory name check device of the distributed database system of the configuration (A), the center connected to each distributed computer in a communicable manner indicates the configuration of a desired directory group on the distributed computer. A directory group, a standard reference table for each distributed computer, a numeric code dictionary holding a correspondence between a directory name and a unique numeric code having a bit number sufficiently smaller than the number of bits constituting the directory name are held, and initial registration means is provided. Refers to the numeric code dictionary, converts the name of each directory included in the standard directory group corresponding to each distributed computer into a numeric code, and registers it in the standard reference table corresponding to each distributed computer. Comparative reference table from each distributed computer And the table comparison means compares the numeric code included in the collected comparison reference table of each distributed computer with the numeric code included in the corresponding standard reference table, and the comparison control means outputs the comparison result. Output from the device. Further, each distributed computer holds a numerical code dictionary which is the same as the numerical code dictionary provided in the center and a comparison reference table corresponding to its own distributed computer, and the table conversion means refers to the numerical code dictionary and The name of the directory included in the directory group of the database in the distributed computer is converted into a numerical code and registered in the comparison reference table, and the table transmission means transmits the comparison reference table in response to a request from the center.

In the directory name check device of the distributed database system having the configuration (B), the center is
A reference directory group corresponding to each distributed computer and a reference reference table corresponding to each distributed computer, which shows the configuration of a desired directory group on the distributed computer, are held, and when initial registration is requested, the initial registration means, Structure of directory name and directory name by assigning a unique numerical code to the name of the directory included in the standard directory group corresponding to each distributed computer and registering the combination of the directory name and the numerical code in the numerical code dictionary Initially creates a numeric code dictionary that retains the correspondence with a unique numeric code that has a sufficiently smaller number of bits than the number of bits, and also assigns a numeric code to the directory name included in the standard directory group for each distributed computer. The standard reference table for each distributed computer Registered in, dictionary delivery means, to deliver the initial created numeric code dictionary to each distributed computer.

In each distributed computer, the contents of the numerical code dictionary distributed from the center are registered in the numerical code dictionary of its own distributed computer.

After that, the table collection means of the center collects the tables by requesting each distributed computer to transmit the comparison reference table at regular intervals.

In each distributed computer, when the transmission of the comparison reference table is requested by the center, the table transmission means activates the table conversion means of its own distributed computer,
This table conversion means refers to the numerical code dictionary of the self-distributed computer, converts the name of the directory included in the directory group of the database in the self-distributed computer into a numerical code, registers it in the comparison reference table, and the table transmission means. Sends the comparison reference table in which the numeric code is registered by the table conversion means to the center.

In the center, the table comparison means compares the numeric code included in the comparison reference table of each distributed computer collected by the table collection means with the numeric code included in the corresponding standard reference table, and the comparison control means. Outputs the comparison result from the output device.

Further, when deleting, adding or changing the directory name for the reference directory group in the center,
The dynamic registration means deletes, adds, or changes the numeric code registered in the corresponding reference reference table, and modifies the numeric code dictionary on the center side as necessary, and the dictionary distribution means makes the modification. Distribute changes to the numeric code dictionary to each distributed computer. On each distributed computer,
The dictionary registration means reflects the delivered changes in the numerical code dictionary of the self-distributed computer.

[0020]

Embodiments of the present invention will now be described in detail with reference to the drawings.

Referring to FIG. 1, an example of a distributed database system to which an embodiment of the present invention is applied is a plurality of distributed computers 1-1 to 1-m and a center 2 communicably connected to these distributed computers by communication lines. It consists of and.

Each of the distributed computers 1-1 to 1-m has a database 101 including a directory group 100, a numeric code dictionary 102, a table conversion means 103, and a comparison reference table, as exemplified by the distributed computer 1-1. It has 104, a table transmission means 105, and a dictionary registration means 106.

The center 2 has the distributed computers 1-1 to 1-1.
Reference directory group 200 corresponding to 1-n one-to-one
1 to 200-m, a numeric code dictionary 201, reference reference tables 202-1 to 202-m corresponding to the respective reference directory groups 200-1 to 200-m in a one-to-one correspondence, an initial registration means 203, and Registration means 204, comparison control means 205, dictionary distribution means 206, table collection means 2
07, a comparison target table 208, a table comparison unit 209, and a terminal 210.

FIG. 2 is a flow chart showing an example of processing of the initial registration means 203, FIG. 3 is a diagram showing a configuration example of a general directory group, FIG. 4 is a diagram showing an example of contents of the numeric code dictionary 201, and FIG. 5 is a reference. Reference tables 202-1 to 202-m
6 is a flowchart showing an example of the processing of the dictionary distribution means 206, FIG. 7 is a flowchart showing an example of the processing of the dictionary registration means 106, and FIG. 8 is a comparison control means 205.
9 is a flowchart showing a processing example of the table collecting means 207, FIG. 10 is a flowchart showing a processing example of the table transmitting means 105, and FIG. 11 is a flowchart showing a processing example of the table converting means 103. 12 is a flowchart showing a processing example of the table comparison means 209, FIG. 13 is a flowchart showing a processing example of the dynamic registration means 204, and FIG. 14 is processing S9 in FIG.
4, a flow chart showing the details of S96,
The operation of this embodiment will be described with reference to the drawings.

Each distributed computer 1 in the center 2
Reference directory group 200-1 corresponding to 1-1-m
At the time of setting of 200-m, the initial registration means 20 from the terminal 210
3, the initial registration means 203 starts the process shown in FIG.

First, the contents of the numeric code dictionary 201 are all cleared (S1), and the final numeric code used for numbering is set to 0.
Is set (S2).

Next, one reference directory group 200-
1 (S3), the reference directory group 200-
One to one directory names are searched (S5).

In general, the directory group has a tree structure as shown in FIG. 3. Therefore, the individual directory names are searched by searching this tree structure in a predetermined order.

Then, it is confirmed that the same name as the searched directory name is not registered in the numeric code dictionary 201 (S7), and the numeric code corresponding to the directory name is numbered (S8). That is, the current final numeral code 0 is incremented by 1, and 1 is assigned. Then, the set of the searched directory name and the assigned number code 0 is registered in the number code dictionary 201 (S9), and the reference directory group 20
The assigned numerical code is registered in the standard reference table 202-1 corresponding to 0-1 (S10).

Next, returning to step S5, the next one directory name is searched from the reference directory group 200-1,
The above process is repeated. Then, the reference directory group 20
When it is determined in step S6 that the processing of all directory names included in 0-1 has been completed, the process returns to step S3, the next reference directory group 200-2 is focused, and the same as the previous reference directory group 200-1. The process of is repeated.

At this time, the reference directory group 200-2
If it is determined in step S7 that the same directory name as the directory name searched from is registered in the numeric code dictionary 201, new numbering and registration in the numeric code dictionary 201 are not performed, and the same directory name is first registered. The numerical code assigned to the number is registered in the standard reference table 202-2 (S11).

When the same processing is completed for all the remaining reference directory groups, the reference directory group 20 is stored in the numeric code dictionary 201 as shown in FIG.
Unique numeric codes assigned to all directory names included in 0-1 to 200-m are registered.
Further, in each of the standard reference tables 202-1 to 202-m, for example, as shown in FIG.
Numerical codes assigned to the directory names included in 00-1 to 200-m are registered.

When the initial registration means 202 determines in step S4 of FIG. 2 that the processing of the last reference directory group 200-m has been completed, it requests the dictionary delivery means 206 to deliver the numeric code dictionary 201 (S12). ), The processing of FIG. 2 ends.

The dictionary delivery means 206 is a means for performing the processes S21 to S23 as shown in FIG.
When 03 requests distribution of the numerical code dictionary 201,
The contents of the numeric code dictionary 201 are sequentially transmitted to each of the distributed computers 1-1 to 1-m.

In the distributed computer 1-1 to which the contents of the numeric code dictionary 201 are transmitted from the center 2, the dictionary registration means 106 is activated and the processing shown in FIG. 7 is performed.
First, the dictionary registration means 106 receives the contents of the numerical code dictionary 201 transmitted from the center (S31).
Next, since the received information is the entire number code dictionary, it is determined to be initial registration (YES in S32), and the content of the received number code dictionary 201 is registered in the number code dictionary 102 of the self-distributed computer 1-1 (S33). The other distributed computers 1-2 to 1-m also perform the same processing as the distributed computer 1-1. Thereby, each distributed computer 1-1 to
The content of the numerical code dictionary 102 in 1-m is exactly the same as the numerical code dictionary 201 of the center 2.

Now, during operation of the distributed database system, the comparison control means 205 of the center 2 periodically (for example, every predetermined time or every predetermined day) executes the processing shown in FIG.

First, the comparison control means 205 pays attention to one reference reference table 202-1 (S41), designates the distributed computer 1-1 corresponding to the noted reference reference table 202-1 and collects the table. 207 is activated (S43).

As shown in FIG. 9, the activated table collecting means 207 first sets the designated distributed computer 1.
The transmission of the comparison reference table is requested by communication with -1 (S51).

In the distributed computer 1-1, when the center 2 requests the transmission of the comparison reference table, the table transmitting means 105 is activated, and the table transmitting means 105 starts the processing of FIG. 10, and first, the table converting means. 103 is activated (S61).

The activated table conversion means 103 converts the directory name in the directory group 100 into a numerical code and sets it in the comparison reference table 104 by executing the processing shown in FIG. That is, first, one directory name is searched from the directory group 100 (S71), and the numerical code corresponding to the searched directory name is searched from the numerical code dictionary 102 (S7).
3).

If the search is successful (YES in S74),
The obtained numeric code is registered in the comparison reference table 104 (S75), the process returns to step S71, and the above-described process is repeated for the next directory name. If the search fails, that is, the numerical code corresponding to the directory name searched from the directory group 100 is the numerical code dictionary 1
If the directory name is not registered in 02, there is a possibility that a directory not managed by the center 2 is mistakenly created on the distributed computer 1-1. Notify the transmitting means 105 (S76), and process S71.
Return to and proceed to the processing of the next directory name. And
When it is determined in step S72 that all directory names in the directory group 100 have been processed, the process of FIG. 11 ends.

When the processing of the table conversion means 103 is completed, the table transmission means 105 transmits the created comparison reference table 104 to the center 2 (S62). Also,
If the directory name is notified from the table conversion means 103, the directory name is also transmitted to the center 2 (S63), as shown in FIG.
The processing of 0 is completed.

The table collecting means 207 of the center 2 receives the comparison reference table 1 from the request-destination distributed computer 1-1.
When 04 is transmitted, it is received and stored in the comparison target table 208 (S52). When the directory name is received from the request-destination distributed computer 1-1, the comparison control means 205 is notified of it (S5).
3), the process of FIG. 9 is completed.

When the processing of the table collection means 207 is completed, the comparison control means 205 then specifies the reference reference table 202-1 of interest and activates the table comparison means 209 (S44).

As shown in FIG. 12, the table comparison means 209 pays attention to one numeric code in the reference reference table 202-1 designated by the comparison control means 205 (S8).
1) It is checked by comparing the numerical codes whether the same numerical code as this numerical code exists in the comparison target table 208 (S83). Then, if there is a matching numeric code (YES in S84), the numeric code (received numeric code) in the compared comparison target table 208 is marked (S85), and the process returns to the process S81 to return to the reference reference table. The above-mentioned processing is repeated while paying attention to the next one numeric code in 202-1.

On the other hand, when there is no numeric code in the comparison target table 208 that matches the current numeric code of interest (NO in S84), the current numeric code of no match is stored internally ( S86) and the process returns to S81.

The above-mentioned processing is applied to the standard reference table 20.
When all the numerical codes in 2-1 have been processed (YES in S82), the comparison result is returned to the comparison control means 205 (S87), and the processing of FIG. 12 is ended. There are the following types of comparison results at this time.

Comparison result indicating perfect match; when numeric code is completely matched Comparison result indicating that there is a numeric code that cannot be matched in the reference reference table; Will be returned. The comparison result indicating that there is a numerical code that cannot be matched in the comparison target table; at this time, the numerical code that cannot be matched is also returned. The comparison result indicating that there is a numerical code that cannot be matched in both the reference reference table and the comparison target table; in this case, it is returned by specifying which table the numerical code that cannot match. .

Upon receiving the comparison result from the table comparison unit 209, the comparison control unit 205 outputs the comparison result to the terminal 210 and notifies the operator (S45). At this time, the comparison control means 205 is
The directory name corresponding to the returned numeric code is acquired from the numeric code dictionary 201, and the directory name is output to the terminal 210 together with the numeric code. If the directory name is notified from the table collection unit 207, the comparison control unit 205 outputs the directory name to the terminal 210 as the directory name that could not be coded by the distributed computer 1-1.

Upon completion of processing the reference reference table 202-1, the comparison control means 205 returns to the processing S41 of FIG. 8, pays attention to the next reference reference table 202-2, and performs the same processing as described above. The last standard reference table 20
Continue to 2-m. And the last standard reference table 2
When it is determined in step S42 that the processing up to 02-m has been completed, the processing of the current periodical check is ended.

By regularly executing the above-mentioned checks, the following can be detected and the measures can be promptly implemented.

(1) A directory that should not be deleted is mistakenly deleted due to an operator's operation error on a certain distributed computer side. (2) A directory that should not be added is mistakenly added due to an operator's operation error on a certain distributed computer side. (3) The directory name is mistakenly changed due to an operator's operation mistake on a certain distributed computer side.

By the way, directories are added / deleted to / from the database 101 of each distributed computer.
When the directory name is changed, the reference directory groups 200-1 to 200- stored on the center 2 side are stored.
m is also changed accordingly by the operation of the terminal 210. However, when the reference directory group 200-1 to 200-m is changed, the reference reference table 202-
It is also necessary to change 1 to 202-m, and in some cases, it is necessary to change the number code dictionaries 201 and 102.
Such a change is made by changing the reference directory groups 200-1 to 200-2.
It is possible to reactivate the initial registration means 202 after the change of 00-m, but since there is a lot of waste, in the present embodiment, the dynamic registration means 204 can dynamically change only the necessary part. I have to. Hereinafter, the dynamic registration means 2
The operation of 04 will be described.

Reference directory group 200-1 to 200-
If a certain directory is added to m, what directory name is added to which reference directory group, and if a certain directory is deleted, what directory from which reference directory group is added If the directory having the name is deleted, and if the directory name is further changed, what kind of directory name of which reference directory group is changed to what kind of directory name is input from the terminal 210, respectively, and the dynamic registration means Start 204.

When activated, the dynamic registration means 204 starts the process shown in FIG. 13 and, in the case of deleting the directory name (YES in S91), executes the deleting process S93 and in the case of adding the directory name ( (YES in S92), an additional process S94 is executed. When the directory name is changed (NO in S92), the deletion process S95 is executed and then the addition process S96 is executed. Note that additional processing S94 and S96
The details of are shown in FIG.

For example, when a certain directory name in the reference directory group 200-1 is deleted, the dynamic registration means 204 uses the numerical code corresponding to the deleted directory name as the numerical code in step S93 of FIG. It is acquired from the dictionary 201 and the acquired numeric code is deleted from the standard reference table 202-1.

Further, for example, the reference directory group 200-
When a certain directory name is added to 1, the dynamic registration means 204 first checks, as shown in FIG. 14, whether or not the added directory name is registered in the number code dictionary 201 (S101). If it is registered, the numeric code registered in the numeric code dictionary 201 corresponding to the directory name is used as the standard reference table 202.
-1 is registered (S102).

On the other hand, if the same directory name is not registered (NO in S101), a new numerical code is assigned (S103). That is, the final numeral code inherited from the initial registration means 203 is incremented by 1 to generate a unique numeral code. Next, the combination of the numbered number code and the added directory name is registered in the number code dictionary 201 (S104), and the numbered number code is registered in the standard reference table 202-1 (S105). Then, the dictionary delivery unit 206 is requested to deliver the added dictionary information, that is, the information of the set of the number code assigned above and the added directory name (S106).

The dictionary delivery means 206 executes the processing shown in FIG.
Distribute dictionary information to -m.

The dictionary registration means 106 of each of the distributed computers 1-1 to 1-m, which has received the distribution of the dictionary information, receives the dictionary information from the center 2 in the process S31 of FIG. 7 and partially registers it (at S32). No), the received dictionary information is added to the number code dictionary 102 of the own distributed computer (S).
34).

Further, for example, the reference directory group 200-
When a certain directory name in 1 is changed to another directory name, the dynamic registration means 204 obtains the numeric code obtained by searching the numeric code dictionary 201 with the directory name before the change in the process S95 of FIG. Is deleted from the standard reference table 202-1. Then, the addition process described in FIG. 14 is performed on the changed directory name (S96).

[0062]

As described above, according to the present invention, the following effects can be obtained.

Since the directory name is converted into a unique numerical code having a smaller number of bits and the directory name comparison is processed by the numerical code comparison, the comparison processing time at the center is shortened and the directory name is checked at high speed. It becomes possible to do. For example, if the total number of directory names is 10,000, it is only necessary to compare a 4-digit numerical code in decimal number, and the comparison processing time is significantly shortened as compared with the case of directly comparing the directory names of 60 to 100 characters. .

With the configuration in which the comparison reference table is collected and the comparison and collation are performed at regular time intervals, it is possible to detect the lack of the directory of the distributed computer and the like within the constant time.

When a new directory is legally added to the directory group of each distributed computer, an existing directory is deleted, or the name is changed, the reference directory group on the center side is corrected accordingly, and the state is changed. If you check with, you can proceed with the check after adding, deleting, or renaming the directory as a normal state, but for that purpose, you need to change the reference table or the numeric code dictionary if necessary. . This can be dealt with by performing the initial registration again, and can be dealt with without initial registration in the configuration including the dynamic registration means.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of a distributed database system to which the present invention is applied.

FIG. 2 is a flowchart showing a processing example of an initial registration unit.

FIG. 3 is a diagram showing a configuration example of a directory group.

FIG. 4 is a diagram showing an example of contents of a numeric code dictionary.

FIG. 5 is a diagram showing an example of contents of a standard reference table.

FIG. 6 is a flowchart showing a processing example of a dictionary delivery means.

FIG. 7 is a flowchart showing a processing example of a dictionary registration means.

FIG. 8 is a flowchart showing a processing example of comparison control means.

FIG. 9 is a flowchart showing a processing example of a table collecting unit.

FIG. 10 is a flowchart showing a processing example of a table transmitting means.

FIG. 11 is a flowchart illustrating a processing example of a table conversion unit.

FIG. 12 is a flowchart showing a processing example of table comparison means.

FIG. 13 is a flowchart showing a processing example of a dynamic registration means.

14 is a flowchart showing details of processes S94 and S96 in FIG.

FIG. 15 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 1-1 to 1-m ... Distributed computer 100 ... Directory group 101 ... Database 102 ... Numerical code dictionary 103 ... Table conversion means 104 ... Comparison reference table 105 ... Table transmission means 106 ... Dictionary registration means 2 ... Center 200-1 to 200 -M ... Standard directory group 201 ... Numerical code dictionary 202-1 to 202-m ... Standard reference table 203 ... Initial registration means 204 ... Dynamic registration means 205 ... Comparison control means 206 ... Dictionary distribution means 207 ... Table collection means 208 ... Comparison target table 209 ... Table comparison means 210 ... Terminal

Claims (6)

[Claims] 1. A directory name checking device of a distributed database system for checking the name of each directory included in a directory group of a database in each distributed computer on the distributed database system, in a center connected to each distributed computer so as to communicate with each other. , A standard directory group for each distributed computer showing a desirable directory group structure on the distributed computer, a standard reference table for each distributed computer, a directory name, and a unique number of bits sufficiently smaller than the number of bits constituting the directory name A numeric code dictionary that holds a corresponding relationship with various numeric codes, and by referring to the numeric code dictionary, the names of the directories included in the reference directory group corresponding to each distributed computer are converted into numeric codes, Initial registration means for registering in the standard reference table corresponding to a distributed computer, table collection means for collecting a comparison reference table from each distributed computer, and numbers included in the comparison reference table of each distributed computer collected by the table collection means. A table comparison means for comparing the code with the numerical code included in the corresponding reference reference table, and a comparison control means for outputting the comparison result by the table comparison means from the output device are provided, and each distributed computer is provided with the center. A numeric code dictionary that is the same as the provided numeric code dictionary, a comparison reference table that is compatible with your own computer, and the numeric code dictionary is used to reference the names of directories included in the directory group of the database in the local distributed computer. Converted to the comparison reference table And table conversion means for registering the directory name checking device of a distributed database system, characterized by comprising a table transmitting means for transmitting the comparison reference table to the center in response to a request from the center. 2. A directory name checking device of a distributed database system for checking the name of each directory included in a directory group of a database in each distributed computer on the distributed database system, in a center connected to each distributed computer so as to communicate with each other. , A standard directory group for each distributed computer showing a desirable directory group structure on the distributed computer, a standard reference table for each distributed computer, a directory name, and a unique number of bits sufficiently smaller than the number of bits constituting the directory name A numeric code dictionary that holds the corresponding relationship with various numeric codes, and by requiring initial registration, a unique numeric code is assigned to the name of the directory included in the reference directory group corresponding to each distributed computer. The group of directory names and numerical codes is registered in the numerical code dictionary, and the numerical codes assigned to the names of the directories included in the reference directory group corresponding to each distributed computer are assigned to each distributed computer. Correspondence between initial registration means for registering in the reference reference table, table collection means for collecting comparison reference tables from each distributed computer, and numerical codes included in the comparison reference table of each distributed computer collected by the table collection means. Table comparison means for comparing the numeric code included in the reference reference table, and comparison control means for outputting the comparison result by the table comparison means from the output device. Numeric code dictionary that is the same as the code dictionary, and your own computer A corresponding comparison reference table, and a table conversion unit that refers to the numerical code dictionary, converts the name of the directory included in the directory group of the database in the self-distributed computer into a numerical code, and registers the numerical code in the comparison reference table. A directory name check device for a distributed database system, comprising: a table transmission means for transmitting the comparison reference table to the center in response to a request from the center. 3. The table collection means of the center collects the comparison reference table of each distributed computer at regular time intervals, and the table transmission means of each distributed computer receives the comparison reference table from the center when the center requests the transmission of the comparison reference table. 3. The directory name check device for a distributed database system according to claim 2, wherein the table conversion means is activated, and the comparison reference table in which a numerical code is registered is transmitted to the center by the activated table conversion means. 4. A directory name checking device of a distributed database system for checking the name of each directory included in a directory group of a database in each distributed computer on the distributed database system, in a center connected to each distributed computer so as to communicate with each other. , A standard directory group for each distributed computer showing a desirable directory group structure on the distributed computer, a standard reference table for each distributed computer, a directory name, and a unique number of bits sufficiently smaller than the number of bits constituting the directory name A numeric code dictionary that holds the corresponding relationship with various numeric codes, and by requiring initial registration, a unique numeric code is assigned to the name of the directory included in the reference directory group corresponding to each distributed computer. The group of directory names and numerical codes is registered in the numerical code dictionary, and the numerical codes assigned to the names of the directories included in the reference directory group corresponding to each distributed computer are assigned to each distributed computer. Initial registration means for registering in the standard reference table, deleting, adding, or changing the numerical code registered in the corresponding standard reference table when deleting, adding, or renaming a directory name for the standard directory group,
Dynamic registration means for modifying the numeric code dictionary as necessary, contents of the numeric code dictionary registered by the initial registration means, and contents of modification of the numeric code dictionary modified by the dynamic registration means. A dictionary distribution means for distributing to the distributed computer, a table collection means for collecting a comparison reference table from each distributed computer at fixed time intervals, and a numerical code included in the comparison reference table of each distributed computer collected by the table collection means And a table comparison means for comparing the numerical codes included in the corresponding reference reference table, and a comparison control means for outputting the comparison result by the table comparison means from the output device. , The contents of the numerical code dictionary distributed from the center are registered in the numerical code dictionary. With reference to the dictionary registration means, which reflects the contents of changes distributed together with the comparison reference table, and the numeric code dictionary, converts the directory names included in the directory group of the database in the local distributed computer into numeric codes, Table conversion means registered in the comparison reference table, and the comparison reference table in which a numerical code is registered by the table conversion means activated when the center requests the transmission of the comparison reference table. And a table transmitting means for transmitting the information to the center. 5. The table comparison means of the center, when comparing the reference reference table and the comparison reference table, a numeric code registered only in the reference reference table, a numeric code registered only in the comparison reference table 5. The distributed database according to claim 4, wherein the comparison control means acquires the directory name corresponding to the numeric code in the comparison result from the numeric code dictionary and outputs it from the output device. System directory name checking device. 6. The table transmitting means of each distributed computer, when the table converting means detects that the numerical code corresponding to the name of the directory included in the directory group is not registered in the numerical code dictionary, The directory name is transmitted to a center, the table collecting means of the center notifies the received directory name to the comparison control means, and the comparison control means outputs the directory name from an output device. 5. A directory name checking device of the distributed database system according to 5.