JP2013073393A - File management system, file management method and file management program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a file management system, a file management method and a file management program which perform management of a data storage area and realize convenience improvement in file use and cost reduction for file storage, without making a user conscious of a movement policy of the data storage area.SOLUTION: A control part 21 of a management server 20 calculates an evaluation value using a file attribute and a use history of a file on the basis of an archive policy of a group to which the file belongs. An archive target is specified using the evaluation value, and archive processing is executed. The control part 21 calculates an evaluation value using a file attribute and a use history of a file on the basis of a reference support policy of a group to which the file belongs. When a restoration target is determined using the evaluation value, files which belong to the same group are specified and restoration processing is executed. The control part 21 periodically performs setting of the archive policy and setting of the reference support policy.

Description

  The present invention relates to a file management system, a file management method, and a file management program for managing a data storage area for recording a file.

  In many cases, a file created by a user is stored in a data storage device such as a file server, and is referred to or updated as necessary. However, when the storage amount increases, the capacity of the file server is limited, and a new data storage device needs to be prepared. Here, in order to reduce the cost for storing files, there are cases where unnecessary files are deleted or files that are less frequently used are moved to a low-cost storage medium, although the method of use is limited.

  A technique for predicting the usage status of a storage device using a SAN (Storage Area Network) and managing the storage device based on a prediction result has been studied (for example, see Patent Document 1). In the technique described in this document, in order to manage storage devices using SAN, a policy (rule) that defines actions for determination targets and conditions is set. Then, information relating to the usage status of the storage device is collected, a policy determination target value is obtained based on the collected information, and it is determined whether or not the determination target value satisfies the policy condition. When a policy condition is satisfied, the policy action is executed.

JP 2003-345632 A (first page, FIG. 1)

  As described above, there are high and low costs between data storage areas, and files stored in high-cost data storage areas are archived in low-cost data storage areas (for example, compression and low-cost storage media) The cost for storing the file can be reduced. However, in general, the low cost area is less convenient. For example, in a low-cost data storage area, the user cannot directly access it, and time is required for data restoration / decompression, loading from a storage medium, etc., and the stress increases for the user. For this reason, the user tends to place a file that may be used in an unarchived state, and it is difficult to reduce the cost by moving the storage area.

  In addition, the use user and the use frequency differ depending on the file. Therefore, if a rule (archive policy) for moving all files to a low-cost area is applied uniformly, accurate management may not be performed for various files. Furthermore, if an archive policy is defined for each file individually, a work load is imposed on setting the policy.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The present invention manages a data storage area without making the user aware of the data storage area movement policy, and improves the convenience when using a file and the file. An object of the present invention is to provide a file management system, a file management method, and a file management program for reducing the cost of storage.

  In order to solve the above-mentioned problem, the invention described in claim 1 is characterized in that a file storage unit configured by a first storage area and a second storage area for recording a file including a file attribute; History information management means for recording usage history information of the file, group management information storage means in which files are grouped together and group management information for specifying a group to which each file belongs is recorded, Corresponding to a group, a movement policy including a weighting value for a determination element for specifying a file to be moved between the first storage area and the second storage area and a movement necessity determination reference value is recorded. A file management system comprising policy storage means and control means for managing a file storage area based on the migration policy, The control means uses the group management information storage means to specify a group to which the processing target file recorded in the file storage means belongs, and uses the policy storage means to specify the group movement policy. Means for identifying a file attribute and usage history as a determination element in the movement policy for the processing target file, and calculating an evaluation value using a weighting value of the determination element, the evaluation value, and the movement The present invention includes a means for comparing a reference value for determining necessity of movement set in a policy and moving a processing target file determined to be necessary for movement to the other storage area based on the comparison result. To do.

  According to a second aspect of the present invention, in the file management system according to the first aspect, a weighting value for a user as a determination element is recorded in the movement policy, and in calculating the evaluation value, The gist is to identify a user included in the usage history of the history information management means and use the weighting value of the determination element.

  According to a third aspect of the present invention, in the file management system according to the first or second aspect, the control unit uses the group management information storage unit to identify a processing target file belonging to a group, and identifies the file. The gist of the invention is that it further includes means for acquiring usage history information of the processing target file from the history information management means, and executing a process for changing the migration policy of the group based on the usage history information.

  According to a fourth aspect of the present invention, in the file management system according to any one of the first to third aspects of the present invention, the migration policy is configured such that the file that is used less frequently is stored in the second storage area from the first storage area. The archiving policy is to perform archiving by moving to an area, and the gist is that the determination element includes information on the number of times the processing target file is used for a certain period.

  According to a fifth aspect of the present invention, in the file management system according to the fourth aspect of the present invention, in the migration policy change process, the usage history information is used to determine the processing target file belonging to the group during a predetermined evaluation period. When an evaluation value for the number of uses is calculated, and it is determined that the number of uses is small according to a comparison result between the evaluation value for the number of uses and a policy change necessity determination reference value of the archive policy, The gist is to change the reference value for determining whether or not to move the archive policy in the direction of promoting archiving.

  According to a sixth aspect of the present invention, in the file management system according to any one of the first to fifth aspects of the present invention, the migration policy specifies a file to be processed that can be used within a certain period of time as the second target file. The gist is to include a reference support policy for moving from the storage area to the first storage area and returning from the archive.

  According to a seventh aspect of the present invention, in the file management system according to the sixth aspect, all the files belonging to the same group as the processing target file determined to be necessary for movement are stored in the second storage based on the comparison result. The gist is to move from the area to the first storage area.

  According to an eighth aspect of the present invention, in the file management system according to the sixth or seventh aspect, in the migration policy change process, the use history information is used to process a file to be processed in a predetermined evaluation period. , Calculating an evaluation value for the number of return times returned based on the user's request, and according to a comparison result between the evaluation value for the return number and the policy change necessity determination reference value of the reference support policy, If it is determined that the number of times of return is large, the gist is to change the reference value for determining whether or not to move the reference support policy so as to promote the return from the archive.

  In the file management system according to claim 6 or 7, in the file management system according to claim 6 or 7, in the migration policy change process, a file belonging to the same group as the file to be processed is previously stored using the usage history information. An evaluation value is calculated for the total number of return times returned based on the user's request in a predetermined evaluation period, and the evaluation value for the total number of times and a policy change necessity determination reference value of the reference support policy If it is determined that the total number of return times is large according to the comparison result, the reference support policy movement necessity determination reference value is changed so as to promote the return from the archive. And

  According to a tenth aspect of the present invention, in order to record a file including a file attribute, file storage means composed of a first storage area and a second storage area, and usage history information of the file are recorded. History information management means, group management information storage means in which group management information for specifying a group to which the file belongs is recorded, and the first storage area and the second storage area corresponding to the group, Policy storage means for recording a movement policy including a weighting value for a determination element for specifying a file to be moved between and a movement necessity determination reference value, and a control for managing a storage area of the file based on the movement policy A file management system comprising: means for managing files, wherein the control means stores the group management information storage Identifying a group to which the file recorded in the file storage means belongs, identifying a movement policy of the group using the policy storage means, and as a determination element in the movement policy The step of calculating the evaluation value by specifying the file attribute and usage history is compared with the evaluation value and the movement necessity determination criterion value set in the movement policy, and based on the comparison result, the movement necessity And a step of moving the file determined to be moved to the other storage area.

  According to the eleventh aspect of the present invention, in order to record a file including a file attribute, file storage means constituted by a first storage area and a second storage area, and usage history information of the file are recorded. History information management means, group management information storage means in which group management information for specifying a group to which the file belongs is recorded, and the first storage area and the second storage area corresponding to the group, Policy storage means for recording a movement policy including a weighting value for a determination element for specifying a file to be moved between and a movement necessity determination reference value, and a control for managing a storage area of the file based on the movement policy A program for managing files using a file management system comprising: means for managing the group management information; Means for specifying a group to which a file recorded in the file storage means belongs using storage means, means for specifying a movement policy of the group using the policy storage means, and a file as a determination element in the movement policy A means for calculating an evaluation value by specifying an attribute and usage history, comparing the evaluation value with a movement necessity determination reference value set in the movement policy, and determining that movement is necessary based on the comparison result The gist is to function as a means for moving the recorded file to the other storage area.

(Function)
According to the first, tenth, or eleventh aspects, the control means uses the group management information storage means to identify the group to which the file recorded in the file storage means belongs. Next, the group storage policy is specified using the policy storage means. Next, with respect to the processing target file, the evaluation value is calculated by specifying the file attribute and the usage history as determination elements in the migration policy. Then, the evaluation value is compared with the movement necessity determination reference value set in the movement policy, and based on the comparison result, the processing target file determined to be movement is moved to the other storage area. As a result, the file storage destination can be determined based on the migration policy for each group. Furthermore, the necessity of movement can be determined in consideration of various situations using file attributes and usage history.

  According to the second aspect of the present invention, the movement policy records a weighting value for the user as a determination element, and in calculating the evaluation value, the user who is included in the usage history of the history information management means. And the weighting value of the determination element is used. Thereby, it is possible to determine whether or not to change the storage destination of the file in consideration of the attribute of the user of the file.

  According to the invention described in claim 3, the control means uses the group management information storage means to identify the processing target file belonging to the group, and obtains the usage history information of the identified processing target file from the history information management means. To do. Then, based on the usage history information, a group movement policy change process is executed. Thereby, when a group is constituted by a plurality of files, it is possible to correct the transfer policy to an appropriate one in consideration of the usage status of the files belonging to this group.

  According to the fourth aspect of the present invention, the migration policy is an archive policy for archiving by moving a file with a low usage count from the first storage area to the second storage area. Contains information about the number of times the target file is used. As a result, it is possible to archive a file with low usage frequency in a second storage area for a certain period of time for which an evaluation value is calculated by applying a migration policy. Therefore, economically efficient file management can be performed by configuring the second storage area with low-cost hardware with respect to the first storage area.

  According to the fifth aspect of the present invention, the use history information is used to calculate an evaluation value for the number of uses of the processing target file belonging to the group in a predetermined evaluation period. Then, if it is determined that the number of usages is low according to the comparison result between the evaluation value for the number of usages and the policy change necessity determination standard value of the archive policy, the archive policy is moved in a direction to promote archiving. Change the necessity criterion value. As a result, when the frequency of use of the processing target file is low during the period for evaluating whether or not the migration policy needs to be changed, archiving can be promoted and management in which the occupation in the first storage area is suppressed can be performed. .

  According to the invention described in claim 6, the migration policy is a reference support for moving a processing target file that can be used within a certain period of time from the second storage area to the first storage area and returning it from the archive. Includes policy. As a result, a file that can be used can be moved to the first storage area in advance. Therefore, user convenience can be improved even for archived files.

  According to the seventh aspect of the present invention, based on the comparison result, all files belonging to the same group as the process target file determined to be moved are moved from the second storage area to the first storage area. Other files related to files that may be used can be moved by group. Therefore, the user can use the related file without requesting the return.

  According to the eighth aspect of the present invention, in the migration policy changing process, an evaluation value is calculated for the number of times the process target file has been restored based on a user request during a predetermined evaluation period. And, according to the comparison result between the evaluation value about the number of return and the policy change necessity determination standard value of the reference support policy, when it is determined that the number of return is large, in the direction of promoting the return from the archive, Change the reference value of the reference support policy. Thereby, it is possible to correct the movement policy in consideration of the usage status of the file.

  According to the ninth aspect of the present invention, in the movement policy change process, the usage history information is used to determine whether a file belonging to the same group as the processing target file is based on a user request during a predetermined evaluation period. An evaluation value is calculated for the total number of times of return. Then, when it is determined that the total number of return times is large according to the comparison result between the evaluation value for the total number of times and the reference change policy determination criterion value of the reference support policy, the return from the archive is promoted. In the direction, the reference criterion value of the reference support policy is changed. As a result, even if the number of return times for each file is small, the reference support policy can be changed when a predetermined number of return requests are made for the entire group.

  According to the present invention, it is possible to manage a data storage area without making the user aware of the data storage area movement policy, and to improve the convenience when using the file and reduce the cost for storing the file. A file management system, a file management method, and a file management program can be provided.

The system schematic of embodiment of this invention. Explanatory drawing of the judgment element used for the archive policy of this embodiment, and a reference assistance policy, and the outline | summary of a process. It is explanatory drawing of the process sequence of this embodiment, Comprising: (a) is an archive execution process, (b) is explanatory drawing of a reference assistance execution process. It is explanatory drawing of the process sequence of this embodiment, Comprising: (a) is an archive policy setting process, (b) is an explanatory view of a reference assistance policy setting process.

  Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS. In the present embodiment, it is assumed that a file recorded in the data storage unit 10 shown in FIG. 1 is managed. Here, files are managed using two data storage areas (first area 11 and second area 12).

  The data storage unit 10 functions as a file storage unit and records various files used by the user. Each file is given a file identifier for individually identifying each file. For example, as the file identifier, information combining folder information indicating a file storage destination and a file name can be used. Information on file attributes (file name, storage folder, file type, management user, size, creation date, update date, reference date) is recorded in the property area of each file.

  A client terminal 50 used by the user is connected to the data storage unit 10, and a file created by the user is recorded using the client terminal 50. Furthermore, each file is referred (viewed) or updated by the user.

  The data storage unit 10 is provided with a first area 11 as a first storage area and a second area 12 as a second storage area. The first area 11 is a data storage area with a relatively high file storage cost. The second area 12 is a data storage area that has a lower usage cost than the first area 11 but has a low file storage cost.

  In this embodiment, the data storage unit 10 associates the position of data between a virtual volume and a physical volume on the data storage area (the first area 11 and the second area 12). Create a mapping table. The file created in the client terminal 50 is recorded in the first area 11 and registered in the mapping table in association with the save destination folder. Then, the file recorded in the first area 11 is moved to the second area 12 by an archive process to be described later.

  When the data storage unit 10 is accessed from the client terminal 50, the virtual folder configuration registered in the mapping table is displayed on the display of the client terminal 50. When referring to or updating the file, the file in the folder is selected. In this case, the data storage unit 10 specifies the physical storage destination of each file using the mapping table. Here, when the file selected in the client terminal 50 is recorded in the first area 11, this file is output to the display of the client terminal 50 as it is. On the other hand, if the selected file is recorded in the second area 12, the file is moved from the second area 12 to the first area 11 by the restoration process, and then displayed on the display of the client terminal 50. Output.

  The data storage unit 10 is connected to a history management unit 13 that manages file usage history. The history management unit 13 functions as history information management means, monitors the users and usage status of files recorded in the data storage unit 10, and records usage history information. In the present embodiment, records relating to creation history, update history, and reference history are recorded in the usage history information.

In the creation history record, data related to the creator (user identifier) and creation date (creation date and time) are recorded for the file identifier.
In the update history record, data relating to the updater (user identifier) and update date (update date / time) are recorded for the file identifier.
In the reference history record, data relating to a referrer (user identifier) and a reference date (reference date / time and time) are recorded with respect to the file identifier.

  Further, when the file recorded in the second area 12 is selected for use (update or reference) of the file, the file is returned to the first area 11. In this case, the history management unit 13 records the return history information of the file recorded in the second area 12. In the return history information, data relating to a file selector (user identifier) and return date (year / month / day and time) are recorded with respect to the file identifier of the restored file.

  The management server 20 is a computer system that manages files registered by users. In the present embodiment, a process for managing a storage location (first area 11 or second area 12) of a file registered in the data storage unit 10 is executed. As illustrated in FIG. 1, the management server 20 includes a control unit 21, an archive policy storage unit 22, a reference support policy storage unit 23, a group management information storage unit 24, and a user management information storage unit 25. In the present embodiment, the archive policy storage unit 22 and the reference support policy storage unit 23 function as a policy storage unit.

  The control unit 21 includes control means including a CPU, a RAM, a ROM (not shown), and the like, and processes (archive execution stage, reference support execution stage, archive policy setting stage, reference support policy setting stage) described later. Etc.). The control unit 21 functions as an archive execution unit 211, a reference support execution unit 212, an archive policy setting unit 213, and a reference support policy setting unit 214.

  The archive execution unit 211 executes a process of moving the file recorded in the first area 11 to the second area 12 in accordance with the movement policy (archive policy) recorded in the archive policy storage unit 22.

  The reference support execution unit 212 executes a process of moving the file recorded in the second area 12 to the first area 11 according to the movement policy (reference support policy) recorded in the reference support policy storage unit 23.

  The archive policy setting unit 213 executes a process for changing the archive policy recorded in the archive policy storage unit 22. The archive policy setting means 213 holds an archive policy change determination table for changing the archive policy. This archive policy change determination table holds data relating to the evaluation period for determining the usage status of a file and the reference count (policy change necessity determination reference value) for determining whether or not an archive policy needs to be changed. ing. In the present embodiment, a period that goes back a predetermined number of days from the present is determined in advance as an evaluation period of the archive policy.

  The reference support policy setting unit 214 executes processing for changing the reference support policy recorded in the reference support policy storage unit 23. The reference support policy setting means 214 holds a reference support policy change determination table for changing the reference support policy. In this reference support policy change determination table, data relating to an evaluation period for determining the restoration status of a file and a reference count (policy change necessity determination reference value) for determining whether or not a reference support policy needs to be changed are stored. keeping. In the present embodiment, a period that goes back a predetermined number of days from the present is determined in advance as an evaluation period of the reference support policy.

  The archive policy storage unit 22 stores a movement policy (archive policy) for specifying a file to be archived for moving a file recorded in the first area 11 to the second area 12. In addition, the reference support policy storage unit 23 stores a movement policy (reference support policy) for specifying a file that is a reference support processing target for moving the file recorded in the second area 12 to the first area 11. These policies are registered in advance before each process of the archive process and the reference support process is executed, and updated according to the usage status of the file.

  In the present embodiment, each migration policy is applied to each group composed of one or more files. As shown in FIG. 2, a movement policy (archive policy, reference support policy) applied to each group is recorded in association with a group identifier for specifying the group. In this movement policy, a weight value and a counting rule (a weighting method and a movement necessity determination method) for calculating an evaluation value are recorded for an element (determination element) included in a file attribute or usage history. . Further, the movement policy records a movement necessity determination reference value for determining whether or not file movement (archive or restoration) is necessary. In each movement policy, it is not necessary to use all elements included in the file attributes and usage history, and some elements can be used.

For example, in the archiving policy, “number of times of use within a certain period”, “number of users within a certain period”, “number of requests for restoration within a certain period”, “number of persons requested to return within a certain period”, etc. are used as determination factors. to decide.
In the archiving policy that is determined using “the number of times of use during a certain period”, “use user”, “use form”, “creator”, “file type”, “creation date”, “storage folder” are weighted targets. Different weighting values are set according to the above. Here, according to the counting rule, an evaluation value obtained by multiplying the number of uses by a weight value corresponding to each weighting target is calculated for each weighting target. Further, the necessity of archiving is determined according to the comparison result between the aggregate value of each evaluation value and the reference value for determining whether to move, by the method for determining the necessity for movement defined in the counting rule. For example, in the determination method for necessity of movement, the evaluation values calculated for each weighting target are summed up, and it is determined that the movement is necessary when the movement necessity determination reference value is exceeded. Note that the aggregate value is not limited to the total value of the evaluation values, and a maximum value or an average value may be used.

  Here, with respect to the weighting target “use user”, different weighting values are given depending on positions such as “general” and “officer”, “management ID”, and the like. For example, a large weighting value is assigned to a user who has a large influence on convenience evaluation such as an officer.

  A different weighting value is assigned to the weighting target “usage form” depending on “reference”, “update”, and the like. For example, a larger weight value than “reference” is assigned to “update”.

  A different weighting value is assigned to the weighting target “creator” by “matching with user”, “different from user”, and the like. For example, a weighting value larger than “match with user” is assigned to “different from user”.

  The weighting target “file type” is assigned a different weighting value depending on the type specified by the extension or the like. For example, a small weighting value is assigned to a type used exclusively for reference, such as a PDF (Portable Document Format) file, and a large weighting value is used for a type used exclusively for appending, such as a log file. Is given.

For the weighting target “creation date”, a weighting value that is gradually decreased according to the number of elapsed days is assigned.
The weighting target “storage folder” is assigned a different weighting value depending on “general folder”, “backup storage destination, etc., a management work folder used exclusively for management”, “public folder”, and the like. For example, a large weighting value is assigned to “management work folder” and “public folder” so that they are not archived.

  In the archiving policy that is determined using “the number of users within a certain period”, different weighting values are set according to “use user”, “use form”, “creator”, and the like as weighting targets. Here, according to the counting rule, an evaluation value obtained by multiplying the number of users by a weighting value corresponding to each weighting target is calculated for each weighting target. Further, the necessity of archiving is determined according to the comparison result between the total value of each evaluation value and the reference value for determining necessity of movement by the method for determining necessity of movement defined in the counting rule.

  In the archiving policy that is determined using the “return request count within a certain period”, different weighting values are set according to the “use user”, “use form”, “creator”, etc. as weighting targets. deep. Here, according to the counting rule, an evaluation value obtained by multiplying the number of return requests by a weighting value corresponding to each weighting target is calculated for each weighting target. Further, the necessity of archiving is determined according to the comparison result between the aggregate value of each evaluation value and the reference value for determining whether to move, by the method for determining the necessity for movement defined in the counting rule.

  In the archiving policy that is determined using “return request number of people within a certain period”, different weighting values are set according to “use user”, “use form”, “creator”, etc. as weighting targets. deep. Here, according to the counting rule, an evaluation value obtained by multiplying the return request number by a weighting value corresponding to each weighting target is calculated for each weighting target. Further, the necessity of archiving is determined according to the comparison result between the aggregate value of each evaluation value and the reference value for determining whether to move, by the method for determining the necessity for movement defined in the counting rule.

  In the reference support policy, determination is made using “scheduled use date” as a determination element. In the “scheduled use date and time”, a scheduled use date and time specified by a periodic use pattern of the file (interval, specified date, specified time (5 · 10 days, last day, after update of specified file, etc.) is recorded. This usage pattern is specified based on the usage history recorded in the history management unit 13. Here, the remaining time (evaluation value) from the current date to the scheduled usage date is calculated according to the counting rule. The necessity of return is determined according to the comparison result between the evaluation value and the reference value for determining necessity of movement (for example, 24 hours) by the method for determining the necessity for movement defined in the counting rule. Return when:

  The group management information storage unit 24 functions as a group management information storage unit. In the group management information storage unit 24, group management information for specifying a group to which each file belongs is recorded. This group management information is recorded when a group to which each file belongs is registered. This group management information includes data relating to a group identifier and a group definition.

In the group identifier data area, data related to an identifier for specifying each group is recorded.
In the group definition data area, data for specifying files belonging to this group is recorded. For example, when a file belonging to a group is specified by a save destination folder, data relating to the folder identifier of the folder in which the file is recorded is recorded. Furthermore, it is also possible to configure a group using a combination of file attributes, specific save destination folders, file types, and the like. Note that one file can belong to a plurality of groups by group definition.

The user management information storage unit 25 stores user management information of users who use this system. This user management information is recorded when the user registration of the user is performed. This user management information includes data relating to the user identifier and job title.
Data relating to an identifier for identifying each user is recorded in the user identifier data area.
In the post data area, data relating to the post of the user is recorded.

  A processing procedure when file management is performed using the system configured as described above will be described with reference to FIGS. Here, an outline of processing, archive execution processing, reference support execution processing, archive policy setting processing, and reference support policy setting processing will be described in this order.

(Outline of processing)
First, the outline of the processing will be described with reference to FIG.
Here, the control unit 21 of the management server 20 executes an archive execution process (step S1-1). Specifically, the archive execution unit 211 of the control unit 21 executes a process of moving the file from the first area 11 to the second area 12 according to the archive policy. This process will be described later with reference to FIG.

  Moreover, the control part 21 of the management server 20 performs a reference assistance execution process (step S1-2). Specifically, the reference support execution unit 212 of the control unit 21 executes a process of moving the file from the second area 12 to the first area 11 according to the reference support policy. This process will be described later with reference to FIG.

  In addition, the control unit 21 of the management server 20 executes an archive policy setting process (step S1-3). Specifically, the archive policy setting unit 213 of the control unit 21 executes a process of correcting the archive policy according to the usage status of the file. This process will be described later with reference to FIG.

  In addition, the control unit 21 of the management server 20 executes a reference support policy setting process (step S1-4). Specifically, the reference support policy setting unit 214 of the control unit 21 executes a process of correcting the reference support policy according to the usage status of the file. This process will be described later with reference to FIG.

(Archive execution process)
Next, the archive execution process will be described with reference to FIG. This archive execution process is periodically executed at a predetermined cycle. Here, each file recorded in the first area 11 of the data storage unit 10 is sequentially specified as a processing target file, and the following processing is repeated.

  First, the control unit 21 of the management server 20 executes a process for specifying a group to which a process target file belongs (step S2-1). Specifically, the archive execution unit 211 of the control unit 21 compares each group definition recorded in the group management information storage unit 24 with the attribute information of the processing target file. Then, the archive execution unit 211 acquires the group identifier of the group to which the processing target file belongs by specifying the group definition including the attribute information of the processing target file.

  Next, the control unit 21 of the management server 20 executes an affiliation group archive policy specifying process (step S2-2). Specifically, the archive execution unit 211 of the control unit 21 acquires an archive policy associated with the group identifier of the specified group from the archive policy storage unit 22.

  Next, the control unit 21 of the management server 20 executes an archive policy determination element specifying process (step S2-3). Specifically, the archive execution unit 211 of the control unit 21 specifies the determination element and the weighting target set in the acquired archive policy.

  Next, the control unit 21 of the management server 20 executes file attribute and usage history acquisition processing (step S2-4). Specifically, the archive execution unit 211 of the control unit 21 acquires the file attribute recorded in the property area of the processing target file. Further, the archive execution unit 211 acquires the usage history information of the processing target file from the history management unit 13. Then, the archive execution unit 211 specifies the file attribute, the attribute value included in the usage history information, and the history value for the determination element and the weighting target set in the archive policy.

  Next, the control unit 21 of the management server 20 executes an evaluation value calculation process based on the determination element (step S2-5). Specifically, the archive execution unit 211 of the control unit 21 acquires the weighting value and the counting rule according to the determination element in the archive policy. Then, the archive execution unit 211 calculates an evaluation value using the count rule, the weight value, the file attribute, the attribute value included in the usage history information, and the history value. For example, the number of times of use within a predetermined period is acquired, and the weighting value corresponding to the folder in which the file is stored, the weighting value corresponding to the attribute (post) of the user, and the usage form (reference, update) The evaluation value is calculated taking into account the corresponding weighting value.

  Next, the control part 21 of the management server 20 performs the determination process about whether it is an archive object (step S2-6). Specifically, the archive execution unit 211 of the control unit 21 compares the calculated evaluation value with an archive movement necessity determination reference value. When the evaluation value is larger than the movement necessity determination reference value corresponding to the determination element, it is determined as an archive target.

  When it determines with it being an archive object (in the case of "YES" in step S2-6), the control part 21 of the management server 20 performs an archive process (step S2-7). Specifically, the archive execution unit 211 of the control unit 21 moves the processing target file from the first area 11 to the second area 12.

On the other hand, when it is determined that it is not an archive target (in the case of “NO” in step S2-6), the control unit 21 of the management server 20 skips the archive process (step S2-7) and performs the process for this file. finish.
Then, the above process is repeated for all the files recorded in the first area 11.

(Reference support execution process)
Next, the reference support execution process will be described with reference to FIG. This reference support execution process is periodically executed at a predetermined cycle. Here, each file recorded in the second area 12 of the data storage unit 10 is sequentially specified as a processing target file, and the following processing is repeated.

  First, the control unit 21 of the management server 20 executes a process for identifying a group to which a process target file belongs (step S3-1). Specifically, the reference support execution unit 212 of the control unit 21 acquires the group identifier of the group to which the processing target file belongs in the group management information storage unit 24.

  Next, the control unit 21 of the management server 20 executes a process for specifying the belonging group reference support policy (step S3-2). Specifically, the reference support execution unit 212 of the control unit 21 acquires a reference support policy associated with the group identifier of the identified group from the reference support policy storage unit 23.

  Next, the control unit 21 of the management server 20 executes a process for specifying a determination element of the reference support policy (step S3-3). Specifically, the reference support execution unit 212 of the control unit 21 specifies the determination element set in the acquired reference support policy.

  Next, the control unit 21 of the management server 20 executes file attribute and usage history acquisition processing (step S3-4). Specifically, the reference support execution unit 212 of the control unit 21 acquires the file attribute recorded in the property area of the processing target file. Further, the reference support execution unit 212 acquires the usage history information of the processing target file from the history management unit 13. Then, the reference support execution unit 212 specifies the file attribute, the attribute value included in the usage history information, and the history value for the weighting target of the determination element set in the reference support policy in the file attribute and usage history information. For example, for a specific date and a specific time, the remaining time until the scheduled use date is acquired by comparing the current date and time. For the interval, the number of days elapsed is acquired by comparing the previous use date and the current date and time.

  Next, the control unit 21 of the management server 20 executes an evaluation value calculation process based on the determination element (step S3-5). Specifically, the reference support execution unit 212 of the control unit 21 acquires the weight value and the counting rule according to the determination element in the reference support policy. Then, the reference support execution unit 212 calculates the evaluation value using the counting rule, the weight value, the file attribute, the attribute value included in the usage history information, and the history value.

  In this case, for example, a weighting value for the folder in which the file is stored and a weighting value for the number of times of return by a user request may be acquired from the reference support policy, and the evaluation value may be calculated using these. Moreover, you may make it use the weighting value with respect to an attribute (post) of a user. In addition, the number of times of return by a user request within a predetermined period of time is acquired, and the weighting value corresponding to the folder in which the file is stored and the weighting value corresponding to the user's attribute (post) are added, An evaluation value may be calculated.

  Next, the control part 21 of the management server 20 performs the determination process about whether it is return object (step S3-6). Specifically, the reference support execution unit 212 of the control unit 21 compares the calculated evaluation value with the return movement necessity determination reference value. If the evaluation value is larger than the movement necessity determination reference value corresponding to the determination element, it is determined as a return target.

  When it is determined that it is a return target (in the case of “YES” in step S3-6), the control unit 21 of the management server 20 executes a process for specifying a file belonging to the same group (step S3-7). Specifically, the reference support execution unit 212 of the control unit 21 uses the group management information storage unit 24 to belong to the same group using the group definition associated with the group identifier of the group to which the processing target file belongs. Specify the file identifier of the file.

  Next, the control part 21 of the management server 20 performs a return process (step S3-8). Specifically, the reference support execution unit 212 of the control unit 21 moves the processing target file and the file with the file identifier specified in the previous step from the second area 12 to the first area 11.

On the other hand, when it is determined that it is not a return target (in the case of “NO” in step S3-6), the control unit 21 of the management server 20 specifies a file belonging to the same group (step S3-7), a return process (step S3-8) is skipped, and the process for this file is terminated.
Then, the above process is repeated for all the files recorded in the second area 12.

(Archive policy setting process)
Next, the archive policy setting process will be described with reference to FIG. This archive policy setting process is periodically executed at a time interval longer than the execution period of the archive execution process. Here, each group recorded in the group management information storage unit 24 is sequentially identified as a processing target group, and the following processing is repeated.

  First, the control unit 21 of the management server 20 executes a process for specifying a file belonging to the processing target group (step S4-1). Specifically, the archive policy setting unit 213 of the control unit 21 specifies the processing target file from the group management information storage unit 24 using the group definition associated with the group identifier of the processing target group. When a plurality of files belong to the processing target group, all files are specified as processing target files.

  Next, the control part 21 of the management server 20 performs the calculation process of the frequency | count of use of a process target file (step S4-2). Specifically, the archive policy setting unit 213 of the control unit 21 acquires usage history information for all the processing target files from the history management unit 13. Here, it is assumed that usage history information for the evaluation period of the archive policy is acquired. Then, the archive policy setting unit 213 calculates the number of times of use (the total value of the number of references and the number of updates) within the evaluation period in the use history information.

  Next, the control part 21 of the management server 20 performs the determination process about whether there is little utilization (step S4-3). The archive policy setting means 213 compares the calculated usage count with a reference count for determining whether or not the archive policy needs to be changed (archive policy policy change necessity determination reference value). Then, when the number of uses is less than or equal to the reference number, it is determined that the usage is low.

  If it is determined that the usage is low (“YES” in step S4-3), the control unit 21 of the management server 20 executes a policy change process (step S4-4). Specifically, the archive policy setting means 213 of the control unit 21 corrects the archive determination reference value in the direction of decreasing the archive policy of this group. Here, the archive determination reference value of the archive policy is updated to a low value by multiplying the original archive determination reference value by a correction coefficient of less than 1.

On the other hand, when it is determined that the usage is not low (in the case of “NO” in step S4-3), the control unit 21 of the management server 20 skips the policy change process (step S4-4), and the process for this group Exit.
And it repeats until the process about all the groups is complete | finished.

(Reference support policy setting process)
Next, reference support policy setting processing will be described with reference to FIG. This reference support policy setting process is periodically executed at a time interval longer than the execution period of the reference support execution process. Here, each group recorded in the group management information storage unit 24 is sequentially identified as a processing target group, and the following processing is repeated.

  First, the control unit 21 of the management server 20 executes a process for specifying a file belonging to the processing target group (step S5-1). Specifically, the reference support policy setting unit 214 of the control unit 21 specifies the processing target file from the group management information storage unit 24 using the group definition associated with the group identifier of the processing target group. When a plurality of files belong to the processing target group, all files are specified as processing target files.

  Next, the control unit 21 of the management server 20 executes a process for calculating the return count of the processing target file (step S5-2). Specifically, the reference support policy setting unit 214 of the control unit 21 acquires the return history information of the processing target file from the history management unit 13. Here, it is assumed that return history information based on a user request during the evaluation period of the reference support policy is acquired. Then, the reference support policy setting unit 214 calculates the number of return times within this evaluation period in the return history information.

  Next, the control part 21 of the management server 20 performs the determination process about whether there are many return (step S5-3). Specifically, the reference support policy setting unit 214 of the control unit 21 calculates the calculated return count and the reference count for determining whether or not the reference support policy needs to be changed (reference support policy policy change necessity determination reference value). ). If the return count is equal to or greater than the reference count, it is determined that there are many returns.

  When it is determined that there are many returns (in the case of “YES” in step S5-3), the control unit 21 of the management server 20 executes a policy change process (step S5-4). Specifically, the reference support policy setting means 214 of the control unit 21 corrects the return determination reference value in the direction of lowering the reference support policy of this group. Here, the return determination reference value of the reference support policy is updated to a low value by multiplying the original return determination reference value by a correction coefficient of less than 1.

On the other hand, when it is determined that there are not many returns (in the case of “NO” in step S5-3), the control unit 21 of the management server 20 skips the policy change process (step S5-4), and the process for this group Exit.
And it repeats until the process about all the groups is complete | finished.

According to this embodiment, the following effects can be obtained.
(1) In this embodiment, the control part 21 of the management server 20 specifies the archive policy of an belonging group (step S2-2), and specifies the determination element of an archive policy (step S2-3). Furthermore, the control unit 21 of the management server 20 executes processing for acquiring file attributes and usage history (step S2-4). And the control part 21 of the management server 20 performs the calculation process of an evaluation value based on a determination element (step S2-5). When it determines with it being an archive object (in the case of "YES" in step S2-6), the control part 21 of the management server 20 performs an archive process (step S2-7). Thus, archiving can be performed in consideration of various situations such as file attributes and usage conditions. Therefore, it is possible to perform management while suppressing the high-performance first area 11 from being occupied by a low-usage file.

  (2) In the present embodiment, the control unit 21 of the management server 20 specifies the group to which the processing target file belongs (step S2-1), and specifies the archive policy of the belonging group (step S2-2). Since the archive policy is specified for each group, various movement policies can be set efficiently.

  (3) In the present embodiment, the control unit 21 of the management server 20 specifies the reference support policy of the belonging group (step S3-2) and specifies the determination element of the reference support policy (step S3-3). Furthermore, the control unit 21 of the management server 20 executes processing for acquiring file attributes and usage history (step S3-4). And the control part 21 of the management server 20 performs the calculation process of an evaluation value based on a determination element (step S3-5). If it is determined to be a return target (in the case of “YES” in step S3-6), the control unit 21 of the management server 20 specifies a file belonging to the same group (step S3-7), and executes a return process (step S3-6). S3-8). As a result, files that are recorded in the second area 12 and that can be used can be moved to the first area 11 in advance. Therefore, the user can use the file promptly without being aware of the file movement.

  (4) In the present embodiment, the control unit 21 of the management server 20 specifies the group to which the processing target file belongs (step S3-1), and specifies the reference support policy of the belonging group (step S3-2). Thereby, since the reference support policy is specified for each group, various movement policies can be set efficiently.

  (5) In this embodiment, the control unit 21 of the management server 20 executes a process for specifying a file belonging to the processing target group (step S4-1). If it is determined that the usage is low (“YES” in step S4-3), the control unit 21 of the management server 20 executes a policy change process (step S4-4). As a result, the archive policy can be corrected according to the usage status, and accurate archiving can be performed.

  (6) In the present embodiment, the control unit 21 of the management server 20 executes a process for specifying a file belonging to the processing target group (step S5-1). If it is determined that there are many returns based on user requests (“YES” in step S5-3), the control unit 21 of the management server 20 executes policy change processing (step S5-4). As a result, the reference support policy can be corrected according to the usage status, and an accurate return can be performed.

In addition, you may change each said embodiment as follows.
In the above embodiment, the archive policy setting process and the reference support policy setting process are periodically executed. Here, by repeating these processes, an appropriate movement policy corresponding to the frequency of use of the file is generated. Therefore, it is also possible to perform simulation using the generated movement policy and use it for designing the data storage area. Specifically, the change status of the movement policy is monitored, and it is determined that the movement policy has converged when the change frequency is equal to or less than a reference value. Then, the amount of files to be used is newly predicted in the data storage unit, and a simulation is performed using the converged movement policy determination reference values (archive determination reference value, return determination reference value). By this simulation, the file capacity recorded in the first area and the file capacity recorded in the second area are calculated. Thereby, the data storage area can be designed in consideration of the use frequency.

  In the above embodiment, the data storage area (11, 12) is provided in the data storage unit 10. The hardware for realizing these data storage areas (11, 12) is not limited to the above-described configuration. For example, as the second region 12, a recording medium such as a magnetic tape or a magneto-optical disk can be used. In the data storage unit 10, the file may be compressed and recorded. When referring to or updating the file, the data storage unit 10 decompresses the file and expands the file in the first area 11. In this case, the area where the uncompressed file is recorded functions as the first area 11, and the area where the compressed file is recorded functions as the second area 12.

  -In the above embodiment, the judgment elements in the archive policy and the reference support policy are not limited to the above combinations, and other judgment elements can be added or only some judgment elements can be used. It is.

  In the above embodiment, the archive policy setting unit 213 executes a process for changing the archive policy recorded in the archive policy storage unit 22 according to the usage status of the file. Also, the reference support policy setting unit 214 executes a process of changing the reference support policy recorded in the reference support policy storage unit 23 according to the return status. Here, the archive policy may be changed in the case of an overall trend, and the reference support policy may be changed in the case of individual return. For example, in a specific file, when the number of times of return is equal to or greater than a predetermined number (return reference number), the reference support policy is changed in a direction that promotes return. On the other hand, if the return count is greater than or equal to the reference in a specific group, the archive policy is changed so as to suppress archiving.

  In the above embodiment, the group management information storage unit 24 records group management information that identifies the group to which each file belongs. Here, the group configuration may be changed according to the use status and return status of the file. For example, the control unit 21 of the management server 20 identifies the usage status of each file belonging to the same group, and compares the usage status of each file. Here, when a file or a file group that is significantly different from the other files belonging to the same group is detected, the control unit 21 divides these files from the target group to form a new group. . Then, the control unit 21 registers the group definition of this group in the group management information storage unit 24.

  Also, similar usage status groups may be integrated. In this case, the control unit 21 of the management server 20 identifies the usage status of the files belonging to each group and compares the usage status. When a group having a common usage status within a predetermined range is detected, the control unit 21 registers a group definition for making them the same group in the group management information storage unit 24.

  In the above-described embodiment, the determination is made by using “the number of uses within a certain period”, “the number of users within a certain period”, “the number of requests for return within a certain period”, etc. in the archive policy. Here, different weighting values are set according to “use user”, “use form”, “creator”, “file type”, “creation date”, “storage folder”, and the like as determination elements. In the reference support policy, determination is made using “scheduled use date” as a determination element. The determination elements used in these policies are not limited to these. For example, different weight values may be set for the file size range. For example, in the archive policy storage unit 22, when archiving is promoted for a file having a large size, the weighting value is set to be large with respect to the size. Thereby, in the first storage area, occupation by a large file can be suppressed. Further, in the reference support policy storage unit 23, when a return from the archive is promoted for a large file, the weighting value is set so as to increase with respect to the size. As a result, it is possible to improve the convenience by promoting the automatic restoration of a large file that takes a long time to restore.

  In the above embodiment, in the archive policy setting process, the control unit 21 of the management server 20 executes a process for calculating the number of times the process target file is used (step S4-2). Here, a weighting value may be set for the number of uses. In this case, a weighting value and a counting rule for calculating an evaluation value for determining whether policy change is necessary are recorded in the policy change reference information storage unit. Here, as with the archive policy, it is determined whether or not the policy needs to be changed using “the number of times of use during the evaluation period” or the like. Here, an evaluation value obtained by multiplying the number of uses by a weight value corresponding to each determination element is calculated for each determination element. Whether to change the reference support policy is determined according to the comparison between the evaluation value and the determination reference value. Furthermore, as with the archive policy, it is determined whether or not the policy needs to be changed using “number of users within the evaluation period”, “number of return requests within the evaluation period”, “number of return requests within the evaluation period”, etc. It may be.

  In the above-described embodiment, in the reference support policy setting process, the control unit 21 of the management server 20 executes a process for calculating the number of restoration times of the processing target file (step S5-2). Here, a weighting value may be set for the number of return times. In this case, a weighting value and a counting rule for calculating an evaluation value for determining whether policy change is necessary are recorded in the policy change reference information storage unit. For example, the determination is made using “return request count within evaluation period”, “return request count within evaluation period”, “use count within evaluation period”, “number of users within evaluation period”, and the like.

  When judging using “return request count within evaluation period” and “use count within evaluation period”, different weighting values depending on “use user”, “use form”, “creator”, etc. as judgment factors Is set in advance. Then, an evaluation value obtained by multiplying the return request count and the use count by a weight value corresponding to each determination element is calculated for each determination element. Whether to change the reference support policy is determined according to the comparison between the evaluation value and the determination reference value.

  In addition, when judging using “return request number within evaluation period” and “number of users within evaluation period”, it depends on “use user”, “use form”, “creator”, etc. as judgment factors Set the weight value. Then, an evaluation value obtained by multiplying the return request number of people and the number of users by a weighting value corresponding to each determination element is calculated for each determination element. Whether to change the reference support policy is determined according to the comparison between the evaluation value and the determination reference value.

  In the above embodiment, when it is determined that there are many returns (in the case of “YES” in step S5-3), the control unit 21 of the management server 20 executes a policy change process (step S5-4). Alternatively, the group processing target file may be enlarged.

  DESCRIPTION OF SYMBOLS 10 ... Data storage part, 11 ... 1st area | region, 12 ... 2nd area | region, 13 ... History management part, 20 ... Management server, 21 ... Control part, 211 ... Archive execution means, 212 ... Reference support execution means, 213 ... Archive Policy setting means, 214 ... reference support policy setting means, 22 ... archive policy storage section, 23 ... reference support policy storage section, 24 ... group management information storage section, 25 ... user management information storage section.

Claims (11)

A file storage means configured of a first storage area and a second storage area for recording a file including file attributes;
History information management means for recording usage history information of the file;
Group management information storage means in which files are grouped together and group management information for specifying a group to which each file belongs is recorded;
Corresponding to the group, a movement policy including a weighting value for a determination element for specifying a file to be moved between the first storage area and the second storage area and a movement necessity determination reference value is recorded. Policy storage means
A file management system comprising control means for managing a storage area of the file based on the migration policy,
The control means is
Means for specifying a group to which the processing target file recorded in the file storage means belongs, using the group management information storage means;
Means for specifying a movement policy of the group using the policy storage means;
Means for identifying a file attribute and usage history as a determination element in the migration policy for the processing target file, and calculating an evaluation value using a weighting value of the determination element;
Means for comparing the evaluation value with a movement necessity determination reference value set in the movement policy, and moving a processing target file determined to be moved to the other storage area based on the comparison result; A file management system characterized by comprising: In the movement policy, a weighting value for a user as a determination element is recorded,
2. The file management system according to claim 1, wherein, in the calculation of the evaluation value, a user included in a usage history of the history information management unit is specified and a weighting value of the determination element is used. The control means is
Using the group management information storage means, specify a processing target file belonging to a group, obtain usage history information of the specified processing target file from the history information management means,
3. The file management system according to claim 1, further comprising means for executing a change process of the group movement policy based on the usage history information.   The migration policy is an archiving policy for archiving by moving a file with a low usage count from the first storage area to the second storage area, and the number of times the processing target file is used for a certain period as the determination element The file management system according to claim 1, further comprising: In the movement policy change process,
Using the usage history information, calculate an evaluation value for the number of uses of the processing target file belonging to the group in a predetermined evaluation period,
If it is determined that the number of uses is small according to a comparison result between the evaluation value for the number of uses and a policy change necessity determination standard value of the archive policy, the archive policy is set in a direction to promote archiving. 5. The file management system according to claim 4, wherein the reference value for determining whether to move is changed.   The migration policy includes a reference support policy for moving a processing target file that can be used within a certain period of time from the second storage area to the first storage area and returning it from the archive. The file management system according to any one of claims 1 to 5.   7. The method according to claim 6, wherein all files belonging to the same group as the processing target file determined to be moved are moved from the second storage area to the first storage area based on the comparison result. The file management system described. In the movement policy change process,
Using the usage history information, for the processing target file, calculate an evaluation value for the number of return times that have been returned based on a user request in a predetermined evaluation period,
According to the comparison result between the evaluation value for the number of times of return and the policy change necessity determination standard value of the reference support policy, if it is determined that the number of times of return is large, in the direction of promoting the return from the archive, 8. The file management system according to claim 6, wherein a reference value for determining whether or not to move the reference support policy is changed. In the movement policy change process,
Using the usage history information, for a file belonging to the same group as the processing target file, calculate an evaluation value for the total number of return times returned based on a user request in a predetermined evaluation period,
When it is determined that the total number of return times is large according to the comparison result between the evaluation value for the total number and the policy change necessity determination reference value of the reference support policy, the return from the archive is promoted. The file management system according to claim 6 or 7, wherein a reference value for determining whether to move the reference support policy is changed in a direction. A file storage means configured of a first storage area and a second storage area for recording a file including file attributes;
History information management means for recording usage history information of the file;
Group management information storage means in which files are grouped together and group management information for specifying a group to which each file belongs is recorded;
Corresponding to the group, a movement policy including a weighting value for a determination element for specifying a file to be moved between the first storage area and the second storage area and a movement necessity determination reference value is recorded. Policy storage means
A file management method using a file management system comprising a control means for managing a storage area of a file based on the migration policy,
The control means is
Identifying the group to which the processing target file recorded in the file storage means belongs using the group management information storage means;
Identifying the group movement policy using the policy storage means;
For the processing target file, identifying a file attribute as a determination element in the migration policy, a usage history, and calculating an evaluation value using a weighting value of the determination element;
Comparing the evaluation value with a migration necessity determination reference value set in the migration policy, and moving a processing target file determined to be migrated to the other storage area based on the comparison result; The file management method characterized by performing. A file storage means configured of a first storage area and a second storage area for recording a file including file attributes;
History information management means for recording usage history information of the file;
Group management information storage means in which files are grouped together and group management information for specifying a group to which each file belongs is recorded;
Corresponding to the group, a movement policy including a weighting value for a determination element for specifying a file to be moved between the first storage area and the second storage area and a movement necessity determination reference value is recorded. Policy storage means
A file management system using a file management system comprising a control means for managing a file storage area based on the migration policy,
The control means;
Means for specifying a group to which the processing target file recorded in the file storage means belongs, using the group management information storage means;
Means for identifying the group movement policy using the policy storage means;
Means for identifying a file attribute as a determination element in the migration policy, a usage history for the processing target file, and calculating an evaluation value using a weighting value of the determination element;
As a means for comparing the evaluation value with a migration necessity determination reference value set in the migration policy, and moving a processing target file determined to be migrated to the other storage area based on the comparison result A file management program characterized by functioning.

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