JP2016099902A - Storage management device, storage management system, control method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the data use capacity rate of each storage a predetermined value or below.SOLUTION: According to an embodiment of the invention, a storage management device (15) includes an information collection processing part (151) for collecting the data use capacity rate of each storage corresponding to each of a plurality of data servers, a data movement determination part(152) for determining whether there is a storage in which a data use capacity rate is higher than the predetermined value on the basis of the data use capacity rate of each storage, and a data movement processing part (153) for moving data of a storage in which the data use capacity rate is higher than the predetermined value to a storage in which a data use capacity rate is equal to or less than the predetermined value in the case that the data movement determination part (152) determines that there is a storage in which the data use capacity rate is higher than the predetermined value.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a technology for managing storage.

  For example, Japanese Patent Laid-Open No. 08-237296 discloses a technique for equalizing the amount of communication to a mail server and distributing the processing load.

  In Patent Document 1, the total amount of traffic between each mail server is compared to determine whether there is a mail server with a biased traffic, and when there is a mail server with a biased traffic, The arrangement of user posts that are predicted to have almost equal server loads is planned. This makes it possible to distribute the processing load by equalizing the amount of communication to the mail server.

Japanese Patent Laid-Open No. 08-237296

  In recent years, for example, there is a data system as shown in FIG. The data system shown in FIG. 1 includes user terminals UE1 to UEn (n means an arbitrary number), a data distribution device 101, a data distribution information database 102, and data servers 103A to 103n (n is an arbitrary number). ), And storages 104A to 104n (n means an arbitrary number). In the data system shown in FIG. 1, user terminals UE1 to UEn are connected to a network NW, and a data distribution apparatus 101 is connected to the network NW. Further, a plurality of data servers 103A to 103n are connected to the data distribution apparatus 101, and storages 104A to 104n configured with data capacities that can be processed by the data servers 103A to 103n are respectively connected to the data servers 103A to 103n. Connected individually. The number of data servers 103A to 103n and storages 104A to 104n configuring the data system shown in FIG. 1 is not particularly limited, and can be configured by an arbitrary number. However, it is assumed that the data servers 103A to 103n are individually connected to storages 104A to 104n configured with data capacities that can be processed by the data servers 103A to 103n. For example, it is assumed that the data server 103A is connected to a storage 104A configured with a data capacity that can be processed by the data server 103A. Further, it is assumed that the data server 103B is connected to a storage 104B configured with a data capacity that can be processed by the data server 103B. Further, it is assumed that the data server 103n is connected to a storage 104n configured with a data capacity that can be processed by the data server 103n.

  The data distribution information database 102 manages data distribution information for specifying which data is distributed to which data servers 103A to 103n. When the data distribution apparatus 101 receives data from the user terminals UE1 to UEn via the network NW, the data distribution apparatus 101 converts the received data into data based on the data distribution information managed in the data distribution information database 102. The server 103A to 103n is specified to be distributed to any one data server, and the data is transmitted to the specified data server. The data servers 103A to 103n store the data transmitted from the data distribution device 101 in the storages 104A to 104n connected to the data servers 103A to 103n. As a result, each data distributed by the data distribution device 101 is stored in the storages 104A to 104n connected to the data servers 103A to 103n. However, the data amount of data stored in each of the storages 104A to 104n varies from storage 104A to 104n with time. For this reason, the data use capacity of each of the storages 104A to 104n varies with time.

  In the data system shown in FIG. 1 described above, it is assumed that storages 104A to 104n each configured with an upper limit data capacity that can be processed by each data server 103A to 103n are connected to each data server 103A to 103n. In the data system in such a state, when the free capacity of at least one of the storages 104A to 104n connected to the data servers 103A to 103n decreases, a new data server is newly added to the data server whose free capacity has decreased. Data capacity cannot be increased by adding additional storage. This is because the storage servers 104A to 104n configured with the upper limit data capacity that can be processed by the data servers 103A to 103n are already connected to the data servers 103A to 103n. This is because the upper limit of the data capacity that can be processed by the data server 103A to 103n is exceeded, and the new storage cannot be recognized on the data server 103A to 103n side, making it impossible to process the data.

  For this reason, in the data system in the above-described state, when the free data capacity of the storage connected to a certain data server decreases, the new data server and the data capacity that can be processed by the new data server are used. It is necessary to secure a data capacity by adding a pair of new storage devices. However, if a new data server and a new storage device are added to secure the data capacity, the cost of the additional device increases and the entire data system shown in FIG. The scale will also increase.

  Japanese Patent Application Laid-Open No. 2004-228561 discloses a technique that enables the processing load to be distributed by equalizing the amount of communication to the mail server. However, Patent Document 1 does not consider a method for dealing with a case where the free data capacity of the storage connected to each data server is reduced.

  An object of the present invention is to make the data usage capacity ratio of each storage equal to or less than a predetermined value.

The storage management device according to the present invention is:
An information collection processing unit that collects the data usage capacity rate of each storage corresponding to each of a plurality of data servers;
Based on the data usage capacity rate of each storage, a data movement determination unit that determines whether there is a storage with a data usage capacity rate higher than a default value,
When there is a storage whose data usage capacity rate is higher than the default value by the data movement determination unit, the data that moves storage data whose data usage capacity rate is higher than the default value to storage whose data usage capacity rate is lower than the default value A movement processing unit;
It is characterized by having.

  According to the present invention, the data usage capacity ratio of each storage can be set to a predetermined value or less.

It is a figure which shows the system configuration example of the data system relevant to this invention. It is a figure which shows the system configuration example of the storage management system concerning 1 aspect of this invention. It is a figure which shows the system configuration example of the electronic mail operation management system of this embodiment. It is a figure which shows the structural example of mail distribution information. It is a figure which shows the example of arrangement | positioning of the mailbox stored in each storage 4A-4n. 2 is a diagram illustrating a configuration example of an electronic mail operation management device 5. FIG. It is a figure which shows a series of processing operation examples of the email operation management system of this embodiment. It is a figure which shows the detailed processing operation example of step S3 of FIG. It is a figure which shows an example of the list | wrist of the mailbox of a movement object. FIG. 8 is a first diagram illustrating a detailed processing operation example of steps S4 to S7 in FIG. 7. FIG. 8 is a second diagram illustrating a detailed processing operation example of steps S4 to S7 in FIG. 7. It is a figure which shows an example of the list | wrist of the attribute information memorize | stored in the memory | storage part of the electronic mail operation management apparatus 5. FIG.

(Outline of storage management system according to one aspect of the present invention)
First, an overview of a storage management system according to an aspect of the present invention will be described with reference to FIG. FIG. 2 shows a system configuration example of the storage management system according to one aspect of the present invention.

  As shown in FIG. 2, the storage management system according to one aspect of the present invention corresponds to a plurality of data servers 13A to 13n (n is an arbitrary number) and each of the data servers 13A to 13n. Each storage 14A-14n (n means an arbitrary number) and a storage management device 15 are configured.

  The storage management device 15 includes an information collection processing unit 151, a data movement determination unit 152, and a data movement processing unit 153.

  The information collection processing unit 151 collects the data usage capacity ratio of each storage 14A to 14n corresponding to each of the plurality of data servers 13A to 13n. In FIG. 2, the information collection processing unit 151 acquires and collects the data usage capacity rates of the storages 14A to 14n from the data servers 13A to 13n. However, the data usage capacity ratio may be acquired directly from each of the storages 14A to 14n. Further, the data usage capacity is acquired from each of the data servers 13A to 13n or each of the storages 14A to 14n, and the information collection processing unit 151 calculates the data usage capacity ratio (data usage capacity) from the data usage capacity and the maximum storage capacity of the storage. (Capacity / maximum storage capacity of storage) may be calculated and acquired. In this case, the maximum storage capacity of the storage is acquired from each of the data servers 13A to 13n or each of the storages 14A to 14n when the data usage capacity is acquired, or each of the data servers 13A to 13n or each of the storages 14A to 14A is acquired. You may make it acquire beforehand from 14n.

  The data movement determination unit 152 determines whether there is a storage having a data usage capacity rate higher than a predetermined value based on the data usage capacity rates of the storages 14A to 14n.

  When there is a storage in which the data usage capacity rate is higher than the default value by the data migration determination unit 152, the data movement processing unit 153 sets the data usage capacity rate to the data of the storage whose data usage capacity rate is higher than the default value. Move to the following storage.

  In the storage management system according to one aspect of the present invention, the storage management device 15 collects the data usage capacity rates of the storages 14A to 14n corresponding to the plurality of data servers 13A to 13n. Then, based on the collected data usage capacity ratios of the storages 14A to 14n, the data of the storage whose data usage capacity ratio is higher than the predetermined value is moved to the storage whose data usage capacity ratio is lower than the predetermined value. . As a result, the data usage capacity ratio of each of the storages 14A to 14n can be made equal to or less than a predetermined value. As a result, it is possible to prevent the data free capacity of any one of the storages 14A to 14n from becoming unbalanced, and to suppress the securing of the data capacity by adding a pair of data server and storage devices. Can do. Further, it is possible to suppress the generation of cost due to the addition of the apparatus, and to suppress the increase in the scale of the entire system. Note that the processing performed by the storage management device 15 can also be performed by the data distribution device 11 shown in FIG. 2, for example. It is also possible to carry out with one data server among the data servers 13A to 13n shown in FIG. Hereinafter, a storage management system according to an aspect of the present invention will be described in detail with reference to the accompanying drawings. In the following embodiment, the e-mail operation management system shown in FIG. 3 as an embodiment of the storage management system shown in FIG. 2 will be described as an example.

<System configuration example of e-mail operation management system>
First, a system configuration example of the e-mail operation management system of this embodiment will be described with reference to FIG. FIG. 3 is a diagram showing a system configuration example of the e-mail operation management system of this embodiment.

  The electronic mail operation management system of this embodiment includes user terminals UE1 to UEn (n means an arbitrary number), a mail distribution device 1, a mail distribution information database 2, and mail servers 3A to 3n (n is An arbitrary number), storages 4A to 4n (n means an arbitrary number), and an e-mail operation management apparatus 5.

  In the electronic mail operation management system of the present embodiment, user terminals UE1 to UEn are connected to a network NW, and the mail distribution device 1 is connected to the network NW. In addition, a plurality of mail servers 3A to 3n are connected to the mail distribution apparatus 1, and storages 4A to 4n having an upper limit data capacity that can be processed by the mail servers 3A to 3n, respectively. Is connected. The network NW can be configured in any communication form regardless of wired or wireless.

  The user terminals UE1 to UEn are terminals used by each user. For example, various communication devices that can be connected to the network NW such as a PC, a mobile phone, and a smartphone are applicable. The number of user terminals UE1 to UEn is not particularly limited, and can be configured with an arbitrary number. The user terminals UE1 to UEn transmit an e-mail to the mail distribution device 1 via the network NW. Further, the user terminals UE1 to UEn access one of the corresponding mail servers 3A to 3n via the mail distribution device 1 and store it in a mailbox corresponding to the user who uses the user terminals UE1 to UEn. The user browses e-mails such as received e-mails to the user, sent e-mails sent by the user, and draft e-mails being drafted by the user. Further, the user's address book and schedule management table may be stored in the mailbox. The mailbox is stored in any of the storages 4A to 4n connected to the mail servers 3A to 3n.

  The mail distribution device 1 distributes the e-mail addressed to each user transmitted from the user terminals UE1 to UEn to the corresponding mail servers 3A to 3n. Moreover, the mail distribution device 1 connects the user terminals UE1 to UEn and any of the corresponding mail servers 3A to 3n.

  As shown in FIG. 4, the mail distribution information database 2 stores mail distribution information in which user information and mail server information are associated with each other. The user information is information for specifying each user, and includes a user ID, an e-mail address, and the like. The user ID is information unique to each user for uniquely identifying each user. The e-mail address is address information unique to each user used when each user sends and receives e-mail. The mail server information is information for specifying the mail servers 3A to 3n, and is composed of a mail server ID, an IP address, and the like. The mail server ID is information such as a server name unique to the mail server for uniquely identifying each mail server. The IP address is an address unique to the mail server used when connecting to the mail server. In the mail server information shown in FIG. 4, the mail server information A is information for specifying the mail server 3A. The mail server information B is information for specifying the mail server 3B. The mail server information n is information for specifying the mail server 3n.

  When mail distribution device 1 accepts an e-mail addressed to each user from user terminals UE1 to UEn, each mail server 3A corresponding to each mail server 3A based on the mail distribution information stored in mail distribution information database 2 E-mails are sorted and sent to ~ 3n. Further, the mail distribution device 1 uses the mail distribution information stored in the mail distribution information database 2 when receiving a connection request to the mailbox corresponding to each user from the user terminals UE1 to UEn. The mail box corresponding to the user stored in any one of the storages 4A to 4n connected to the accessed mail server is accessed by accessing any one of the corresponding mail servers 3A to 3n. Can be viewed from the user terminals UE1 to UEn.

  The mail servers 3A to 3n store e-mails in the storages 4A to 4n individually connected to the mail servers 3A to 3n.

  As shown in FIG. 5, each of the storages 4A to 4n has a mailbox for each user. The storage 4A to 4n stores an email corresponding to the user information in a mailbox corresponding to the user information, and stores each user's electronic mail. Mail is managed on a mailbox basis. The mailbox corresponding to each user information is stored in any one of the storages 4A to 4n, and the mailbox corresponding to one user information is not divided and stored in a plurality of storages. . The storages 4A to 4n may be built in the mail servers 3A to 3n. Further, the mail servers 3A to 3n may be externally wired or wirelessly connected. Further, the mail servers 3A to 3n may be connected via a network.

  The numbers of the mail servers 3A to 3n and the storages 4A to 4n constituting the electronic mail operation management system of the present embodiment are not particularly limited, and can be configured by an arbitrary number. However, it is assumed that the mail servers 3A to 3n are connected to the storages 4A to 4n configured by the upper limit data capacity that can be processed by the mail servers 3A to 3n. For example, it is assumed that the mail server 3A is connected to a storage 4A configured with an upper limit data capacity that can be processed by the mail server 3A. Further, it is assumed that the mail server 3B is connected to a storage 4B configured with an upper limit data capacity that can be processed by the mail server 3B. Further, it is assumed that the mail server 3n is connected to a storage 4n configured with an upper limit data capacity that can be processed by the mail server 3n. It is assumed that the electronic mail operation management system of this embodiment is composed of mail servers 3A to 3n of the same model. For this reason, the data capacity of the upper limit value that can be processed by each of the mail servers 3A to 3n is also the same, and each of the mail servers 3A to 3n is connected to the storages 4A to 4n configured with the same data capacity. Since each mail server 3A to 3n is connected to storage 4A to 4n configured with an upper limit data capacity that can be processed by each mail server 3A to 3n, a new storage is provided to each mail server 3A to 3n. Suppose that it cannot be added.

  The e-mail operation management device 5 collects and monitors the data usage capacity ratio of each of the storages 4A to 4n, and moves the data of the storage whose data usage capacity ratio is higher than the default value to the storage whose data usage capacity ratio is lower than the default value. Then, management is performed so that the data usage capacity ratio of each of the storages 4A to 4n is equal to or less than a predetermined value. The data usage capacity ratio is the ratio of the data usage capacity already stored to the data capacity that can be stored in the storage. For example, if the data capacity that can be stored in the storage is 2 terabytes and 1 terabyte of data is already stored in the storage, the data usage capacity ratio is 50% (1 terabyte / 2 terabytes).

  The e-mail operation management system of the present embodiment assigns a mailbox corresponding to each user information to each of the storages 4A to 4n almost equally as shown in FIG. The information is stored in a mailbox corresponding to user information. However, since the user accumulates or does not accumulate e-mails in the mailbox, the data capacity of the e-mail accumulated in the mailbox also varies from user to user over time. As a result, at first, even if the mailboxes are evenly allocated to the respective storages 4A to 4n, the e-mail data capacity accumulated in each mailbox is different for each mailbox as time passes. As a result, the data usage capacity of each of the storages 4A to 4n varies with time. When the data usage capacity of a certain storage becomes full (100%), new data cannot be stored in the storage, which hinders the operation of electronic mail. For this reason, the e-mail operation management apparatus 5 collects and monitors the data usage capacity ratio of each of the storages 4A to 4n, and the data usage capacity ratio of the storage having a data usage capacity ratio higher than the predetermined value is less than the predetermined value. It moves to the storage and manages so that the data usage capacity ratio of each of the storages 4A to 4n is equal to or less than a predetermined value. As a result, the e-mail operation management apparatus 5 prevents the data usage capacity of any one of the storages 4A to 4n from being biased to full.

<Example of Configuration of E-mail Operation Management Device 5>
Next, a configuration example of the electronic mail operation management apparatus 5 according to the present embodiment will be described with reference to FIG. FIG. 6 is a diagram illustrating a configuration example of the e-mail operation management apparatus 5 according to the present embodiment.

  The e-mail operation management apparatus 5 of this embodiment includes a network interface 51, an information collection processing unit 52, a data movement determination unit 53, and a data movement processing unit 54.

  The network interface 51 is an interface for connecting to the mail servers 3A to 3n.

  The information collection processing unit 52 collects resource information and user usage information from each of the mail servers 3A to 3n at a predetermined timing. The resource information is information such as the data usage capacity ratio of the storages 4A to 4n connected to the mail servers 3A to 3n. Note that the resource information is not the data usage capacity rate but the data usage capacity. The data usage capacity is obtained, and the data usage capacity ratio (data usage capacity / storage capacity) is calculated from the data usage capacity and the maximum storage capacity of the storage. It is also possible to obtain the maximum storage capacity. In this case, the maximum storage capacity of the storage may be acquired from each of the mail servers 3A to 3n when acquiring the data usage capacity, or may be acquired in advance from each of the mail servers 3A to 3n. The user usage information includes the data capacity that is the capacity of e-mail stored in each mailbox stored in each storage 4A to 4n, the number of data that is the number of e-mails stored in each mailbox, and the like. Information. The data capacity of the mailbox may include the data capacity stored in the mailbox in addition to the e-mail. Further, the number of data in the mailbox may include the number of data stored in the mailbox other than the electronic mail. The timing at which the information collection processing unit 52 collects information is not particularly limited, and can be performed at an arbitrary timing. For example, information may be collected once a day at 2 am.

  The data movement determination unit 53 determines whether or not data movement of each of the mail servers 3A to 3n is necessary based on the information collected by the information collection processing unit 52. If there is a mail server that is determined to require data movement, the data movement determination unit 53 sets the mail server as the movement source mail server. Further, the data movement determination unit 53 selects a mailbox to be moved from among mailboxes stored in a storage connected to the movement source mail server. In addition, the data movement determination unit 53 selects a destination mail server to which the data is to be moved from among the mail servers that are determined to be unmovable.

  The data movement processing unit 54 instructs data movement to the source mail server, and connects the data of the target mailbox stored in the storage connected to the source mail server to the destination mail server. Move to the storage that has been saved.

<Example of processing operation of e-mail operation management system>
Next, a processing operation example of the e-mail operation management system of this embodiment will be described with reference to FIGS. FIG. 7 shows a series of processing operation examples of the e-mail operation management system of this embodiment. FIG. 8 shows a specific processing operation example of step S3 shown in FIG. FIG. 9 shows a list of mailboxes to be used for data movement. FIG. 10 shows a specific processing operation example of steps S4 to S7 shown in FIG. In FIG. 7, the mail server 3A is the source mail server, and the mail server 3B is the destination mail server. In FIG. 10, the mail server 3A is the source mail server.

  The information collection processing unit 52 of the e-mail operation management device 5 requests resource information and user usage information from each of the mail servers 3A to 3n at a predetermined timing (step S1).

  When each mail server 3A to 3n receives a request for resource information and user usage information, it collects resource information and user usage information of the storages 4A to 4n connected to each mail server 3A to 3n. It transmits to the mail operation management apparatus 5 (step S2).

  Thereby, the information collection processing unit 52 of the electronic mail operation management apparatus 5 collects resource information and user usage information from each of the mail servers 3A to 3n at a predetermined timing.

  The data movement determination unit 53 of the electronic mail operation management apparatus 5 determines whether or not the data movement of each of the mail servers 3A to 3n is necessary based on the resource information collected from each of the mail servers 3A to 3n by the information collection processing unit 52. (Step S3). If there is a mail server determined to require data movement, the data movement determination unit 53 sets the mail server as the movement source mail server. Further, the data movement determination unit 53 selects a mailbox to be moved from among mailboxes stored in a storage connected to the movement source mail server. In addition, the data movement determination unit 53 selects a destination mail server to which the data is to be moved from the mail servers determined to be data movement failure. A specific processing operation example of step S3 will be described in detail with reference to FIG.

  As shown in FIG. 8, the data movement determination unit 53 uses each data 4A-4n based on the data usage capacity ratio of each storage 4A-4n included in the resource information collected from each mail server 3A-3n by the information collection processing unit 52. It is determined whether or not data movement of the servers 3A to 3n is necessary (step A1). Specifically, the data movement determination unit 53 determines that a mail server having a storage data usage capacity rate higher than a predetermined first threshold is a mail server that requires data movement, and sets it as a movement source mail server. As the first threshold, for example, a data usage capacity ratio of 80% can be used as the first threshold. It is also possible to calculate the average value of the data usage capacity ratio of each of the storages 4A to 4n and use the calculated average value + 20% as the first threshold value.

  If there is a mail server determined to require data movement (step A2 / Yes), the data movement determination unit 53 sets the mail server as the movement source mail server. The data movement determination unit 53 also moves the data of each mailbox stored in the storage connected to the source mail server based on the user usage information collected by the information collection processing unit 52 from the source mail server. Time is calculated (step A3). Then, based on the calculated data movement time of each mailbox, a mailbox to be moved is selected (step A4).

  The data movement time is the time taken to move the mailbox data. The data movement time of each mailbox is the data capacity of each mailbox and each mail included in the user usage information collected from the source mail server. Based on the number of data in the box, for example, it can be obtained by the following equation.

Data movement time (seconds) = S + A × T + B × U
S: Overhead time (seconds) for waiting for the change processing of each system that occurs during data movement and the reflection to a plurality of mail servers. S can be changed by default.
A: Mailbox data capacity (GB).
T: Processing time (seconds) per 1 GB of data capacity. T can be changed by default.
B: Number of mailbox data.
U: Processing time per second (number of data). U can be changed by default.
Note that S, T, and U are set according to the performance of the mail servers 3A to 3n and the storages 4A to 4n constituting the electronic mail operation management system of this embodiment, the transmission efficiency of the network, or based on actual measurement values. Is possible.
Further, the data capacity of the mailbox may be the data capacity of the e-mail stored in the mailbox or the data capacity including the capacity of the data stored in the mailbox other than the e-mail. .
The number of data in the mailbox may be the number of emails stored in the mailbox, or the number of data including the number of data stored in the mailbox other than the email.

  Based on the data movement time of each mailbox, the data movement determination unit 53 selects the movement target in order from the mailbox with the largest data capacity among the mailboxes whose data movement time is equal to or less than the predetermined second threshold. Select a mailbox. The second threshold can be arbitrarily set, and for example, 240 seconds can be used as the second threshold.

  Another way to select a mailbox to be moved is from mailboxes whose data movement time is less than or equal to the preset second threshold, from mailboxes with a large mailbox data capacity and a small number of mailbox data. It is also possible to select the mailboxes to be moved in order. For example, it is possible to select the mailboxes to be moved in order from the mailbox with the highest value calculated by the calculation formula (mailbox data capacity / number of mailbox data). It is also possible to select the mailboxes to be moved in order from the mailbox with the lowest value calculated by the formula (number of mailbox data / data volume of mailbox). As another method, among the mailboxes whose data movement time is equal to or less than the predetermined second threshold, the mailbox data capacity is equal to or more than the predetermined third threshold and the number of mailbox data is the predetermined first threshold. It is also possible to select a mailbox with less than 4 thresholds as a mailbox to be moved. The third threshold value and the fourth threshold value can be arbitrarily set.

  In this embodiment, data is moved in units of mailboxes. When data is moved in units of mailboxes, the user corresponding to the mailbox to be moved cannot access the corresponding mailbox using the user terminal while the data is being moved, The box can no longer be used. As a result, while the user is moving the data, the user cannot accumulate e-mails in the movement target mailbox or view the e-mails stored in the mailbox. Therefore, in this embodiment, based on the data movement time of each mailbox, a mailbox that can move a large amount of data in a short time is preferentially selected as a mailbox to be moved. . Thereby, since the data of the mailbox to be moved can be moved in a short time, the period during which the user of the mailbox to be moved cannot use the mailbox can be shortened. As a result, data can be moved in units of mailboxes without hindering the operation of electronic mail.

  The data movement determination unit 53 repeatedly selects the mailbox to be moved until the data usage capacity ratio of the storage of the movement source mail server becomes equal to or less than the first threshold value. Specifically, the data movement determining unit 53 subtracts the total data capacity of the mailboxes to be moved from the data usage capacity of the storage of the movement source mail server, and the data usage capacity ratio of the storage of the movement source mail server is determined. It is determined whether or not the data usage capacity ratio is not less than or equal to the first threshold, and if the data use capacity ratio is not less than or equal to the first threshold, the above-described selection method is used from the remaining mailboxes that are not selected as the mailboxes to be moved. The mailbox to be moved is selected, and the mailbox to be moved is repeatedly selected until the data usage capacity ratio becomes the first threshold value or less.

  However, if the total data capacity of the mailboxes to be moved exceeds a predetermined fifth threshold (for example, 5 GB), the data capacity that can be moved within a predetermined data movement time zone may be exceeded. For this reason, it is preferable to select the mailbox to be moved so that the data capacity of the mailbox to be moved becomes a maximum value that does not exceed the fifth threshold. As a method for setting the data capacity of the mailbox to be moved to a maximum value that does not exceed the fifth threshold, for example, a mailbox having a large data capacity among mailboxes whose data movement time is equal to or less than a predetermined second threshold is used. When the mailboxes are selected in order, and the total data capacity of the selected mailboxes exceeds the fifth threshold (for example, 5 GB), the last selected mailbox is excluded from the move target and the remaining mailboxes The mailbox having the maximum data volume that does not exceed the fifth threshold is selected. Thereby, the data capacity of the mailbox to be moved can be set to the maximum value that does not exceed the fifth threshold value. The fifth threshold can be arbitrarily set and changed according to a predetermined data movement time zone. If the number of mailboxes to be moved exceeds a predetermined sixth threshold (for example, 250), the number of data that can be moved within a predetermined data movement time zone may be exceeded. For this reason, it is possible to select a mailbox to be moved so that the number of mailboxes to be moved does not exceed the sixth threshold. The sixth threshold can be arbitrarily set and changed according to a predetermined data movement time zone.

  The data movement determining unit 53 determines whether the data usage capacity rate of the storage of the source mail server is equal to or lower than the first threshold (step A6 / Yes) or the data usage capacity rate of the storage of the source mail server is the first threshold value. Even if it is not below (step A6 / No), until the total data capacity of the mailboxes to be moved exceeds the preset fifth threshold, or the number of mailboxes to be moved has reached the preset sixth threshold. Until it exceeds (step A7 / Yes), the processing of steps A4 to A7 is repeated to select a mailbox to be moved. Then, when the data usage capacity rate of the storage of the source mail server becomes equal to or less than the first threshold (step A6 / Yes), the data movement determination unit 53 or the data usage capacity rate of the storage of the source mail server is Even if it is not less than the first threshold (Step A6 / No), if the total data capacity of the mailboxes to be moved exceeds the preset fifth threshold, or the number of mailboxes to be moved is the default If the sixth threshold is exceeded (step A7 / Yes), the selection of the mailbox to be moved is terminated. Then, the data movement determination unit 53 selects the mail server with the lowest data usage capacity ratio of the storage from the mail servers determined to be unmovable, and sets it as the movement destination mail server. Then, the data movement determination unit 53 distributes the movement target mailbox to the movement destination mail server (step A8). In this case, even if the data movement determination unit 53 adds the data capacity of the mailbox to be moved to the data usage capacity of the storage connected to the destination mail server, the data usage capacity ratio of the storage of the destination mail server Are moved to the destination mail server so that does not exceed a predetermined seventh threshold (or the first threshold is acceptable). For example, if the total value of the data capacity of the mailbox to be moved is added to the data usage capacity of the storage of the destination mail server, the data usage capacity ratio of the storage of the destination mail server is the seventh threshold (or the first threshold is acceptable) Is exceeded, the mailboxes to be moved are distributed to the destination mail server within a range where the data usage capacity rate does not exceed the seventh threshold (or the first threshold is acceptable). Then, the remaining mailboxes to be moved are distributed to the destination mail server with the next lowest data usage capacity rate. As a result, all the mailboxes to be moved can be distributed to the destination mail server. The seventh threshold value can be arbitrarily changed. The data movement determination unit 53 creates a list of mailboxes to be moved (step A10) when all the mailboxes to be moved are distributed to the destination mail server (step A9 / Yes). For example, the list shown in FIG. 9 is created. The list shown in FIG. 9 is associated with order, mailbox information, and destination mail server information. The order is the order in which the data movement process is performed. Mailbox information is information for specifying a mailbox to be moved. The destination mail server information is information for specifying the destination mail server. In this embodiment, a mailbox that can move a large amount of data in a short time is preferentially set as a mailbox to be moved. For this reason, the list shown in FIG. 9 is selected as a mailbox to be moved in the order of mailboxes A → D → C.

  If there is a mail server that has been determined to require data movement by performing a series of processes shown in FIG. 8, the data movement determination unit 53 sets the mail server as the movement source mail server, selects a mailbox to be moved, The destination mail server will be selected. Then, the process of step S3 is terminated, and the process proceeds to step S4 shown in FIG.

  The data movement processing unit 54 has a movement source mail server that has been determined to require data movement by the data movement determination unit 53, and when the movement target mail server or the movement destination mail server is selected, the movement source mail A data movement instruction is transmitted to the server (step S4). In this case, based on the list of mailboxes to be moved shown in FIG. 9, the data movement processing unit 54 issues a data movement instruction to the source mail server so that data movement processing is performed in order from the mailboxes with the highest priority. Send. Initially, based on the list of mailboxes to be moved shown in FIG. 9, the data movement processing unit 54 transmits to the source mail server an instruction to move the data of the mailbox to be moved with the highest priority.

  When the movement source mail server receives a data movement instruction from the electronic mail operation management apparatus 5, the movement source mail server performs data movement processing for moving the data of the movement target mailbox to the storage of the movement destination mail server (step S5). Then, a data movement end notification of the mailbox to be moved is transmitted to the e-mail operation management apparatus 5 (step S6).

  When the e-mail operation management apparatus 5 receives the data movement end notification, the data movement processing unit 54 selects the second highest priority moving target mailbox based on the moving target mailbox list shown in FIG. Send data movement instructions to the source mail server. The source mail server that has received the data movement instruction performs data movement processing for the mailbox to be moved (step S5), and transmits a data movement end notification to the electronic mail operation management apparatus 5 (step S6). The e-mail operation management apparatus 5 and the source mail server repeatedly perform the processing in steps S4 to S6 for each mailbox, and the data movement processing for all the target mailboxes on the list shown in FIG. It will be repeated until. The data movement processing unit 54 determines that all data movement has ended when it has received a data movement end notification for all the mailboxes to be moved on the list shown in FIG. 9 (step S7). A specific processing operation example of steps S4 to S7 will be described in detail with reference to FIG.

  The data movement processing unit 54 of the electronic mail operation management apparatus 5 selects one piece of mailbox information to be moved based on the list of mailboxes to be moved shown in FIG. A data movement instruction including the mail server information is transmitted to the target source mail server (step B1). In the case of the list shown in FIG. 9, the data movement processing unit 54 selects the mailbox A with the order of 1, and associates the current mailbox A with the data movement instruction to move the mailbox A to the mail server 3B. To the mail server 3A.

  When the movement source mail server receives the data movement instruction from the electronic mail operation management apparatus 5, the movement source mail server moves the data of the movement target mailbox included in the data movement instruction to the storage of the movement destination mail server (step B2). . In the case of the list shown in FIG. 9, the mail server 3A, which is the movement source mail server, accepts a data movement instruction to move the mailbox A to the mail server 3B, so the mail server 3A, which is the movement source mail server, The data of A is moved to the storage 4B of the mail server 3B. Thereby, the mailbox A of the user information A is moved from the storage 3A to the storage 4B. When the movement of the data is completed (step B3 / Yes), the movement source mail server accesses the mail distribution information database 2 and stores the mail distribution information corresponding to the movement target mailbox that has been moved. Update (step B4). The mail distribution information is updated by changing the mail server information associated with the user information of the mailbox to be moved for which the data movement process has been completed from the information of the movement source mail server to the information of the movement destination mail server. In the case of the list shown in FIG. 9, the mail server information associated with the user information A of the mailbox A is changed from the mail server information A which is the information of the source mail server to the mail server information which is the information of the destination mail server. Change to B. In addition, the movement source mail server transmits a data movement end notification of the movement target mailbox to the electronic mail operation management apparatus 5 (step B5). In the case of the list shown in FIG. 9, the data movement end notification of the mailbox A is transmitted to the electronic mail operation management apparatus 5. Thereby, the data movement of the mailbox A in the order 1 in the list shown in FIG. 9 is completed. The data movement processing unit 54 of the e-mail operation management apparatus 5 stores the presence / absence of a data movement end notification for each movement target mailbox, based on the movement target mailbox list shown in FIG. Based on the presence / absence of a data movement end notification, it is determined whether or not the data movement of all the mailboxes to be moved has been completed (step B6). If the data movement of all the movement target mailboxes has not been completed (step B6 / No), the data movement processing unit 54 proceeds to step B1, and based on the list shown in FIG. 9, the next movement target Is sent to the target source mail server (step B1), and a data movement instruction including the target mailbox information and destination mail server information is transmitted to the target source mail server. The data movement processing unit 54 transmits a data movement instruction to the movement source mail server based on the list shown in FIG. 9 until the data movement of all the mailboxes to be moved is completed, and performs the processing of steps B1 to B6. Repeatedly. The data movement processing unit 54 determines that the data movement of all the movement target mailboxes is completed when the data movement end notification of all the movement target mailboxes is received from the movement source mail server (step B6 / Yes), it is determined that all data movement has been completed (step B7).

  As described above, the data movement processing unit 54 of the electronic mail operation management apparatus 5 performs a data movement instruction for each mailbox on the basis of the list of mailboxes to be moved shown in FIG. The original mail server accesses the mail distribution information database 2 every time the data movement processing of one movement target mailbox is completed, and mail distribution information corresponding to the movement target mailbox that has completed the data movement process. Update. As a result, when the mail distribution information managed by the mail distribution information database 2 is updated, the user can use the mailbox whose data movement has been completed.

  Note that the processing operation example shown in FIG. 11 may be performed instead of the processing operation example shown in FIG. 10 described above. In this case, first, the data movement processing unit 54 of the electronic mail operation management apparatus 5 transmits a data movement instruction including a list of mailboxes to be moved shown in FIG. 9 to the movement source mail server (step C1). When the movement source mail server receives a data movement instruction from the e-mail operation management apparatus 5, the movement e-mail server moves the mail to be moved based on the list of movement target mailboxes shown in FIG. 9 received from the e-mail operation management apparatus 5. One box is selected, and the data of the selected mailbox to be moved is moved to the storage of the destination mail server (step C2). In the case of the list of FIG. 9, the mailbox A with the order 1 is selected, and the data of the selected mailbox A is moved to the storage 4B of the mail server 3B. Thereby, the mailbox A of the user information A is moved from the storage 3A to the storage 4B. When the movement of the data is completed (step C3 / Yes), the movement source mail server accesses the mail distribution information database 2 and stores the mail distribution information corresponding to the movement target mailbox that has been moved. Update (step C4). In the case of the list of FIG. 9, the mail server information A associated with the user information A of the mailbox A is changed from the mail server information A which is the information of the movement source mail server to the mail server information B which is the information of the movement destination mail server. Change to In addition, the movement source mail server transmits a data movement end notification of the movement target mailbox to the electronic mail operation management apparatus 5 (step C5). In the case of the list of FIG. 9, a notification of completion of data movement of the mailbox A is transmitted to the electronic mail operation management apparatus 5. As a result, the data movement of the mailbox A in order 1 in the list of FIG. 9 is completed. Based on the list shown in FIG. 9, the movement source mail server repeats the processing of steps C2 to C6 until data movement of all the movement target mailboxes is completed, and data movement of all the movement target mailboxes is performed. Is completed (step C6 / Yes), an all-data movement end notification is transmitted to the e-mail operation management apparatus 5 (step C7), and the process is terminated. When the data movement processing unit 54 of the e-mail operation management apparatus 5 receives the all data movement end notification from the movement source mail server, the data movement processing unit 54 determines that the data movement of all the movement target mailboxes is completed, and moves all data. It is determined that the process is finished (step C8). In this way, the e-mail operation management apparatus 5 transmits the list of mailboxes to be moved shown in FIG. 9 to the source mail server, and the source mail server sends the list of mailboxes to be moved shown in FIG. Based on the data movement processing of the mailbox to be moved (step C2), every time the data movement processing of one mailbox to be moved is completed (step C3 / Yes), the mail distribution information database 2 is accessed. Then, the mail distribution information corresponding to the movement target mailbox for which the data movement processing is completed is updated (step C4), and the data movement end notification of the movement target mailbox is transmitted to the electronic mail operation management apparatus 5. It is also possible (step C5). Also in this case, when the mail distribution information managed in the mail distribution information database 2 is updated, the user can use the mailbox whose data movement has been completed. In FIG. 11, the source mail server transmits an all data movement end notification to the e-mail operation management apparatus 5 (step C7), and the data movement processing unit 54 of the e-mail operation management apparatus 5 sends an all data movement end notification. When it is received, it is determined that the data movement of all the mailboxes to be moved has been completed, and it is determined that the movement of all data has been completed (step C8). However, when all data movement end notification is not performed in step C7, and the data movement end notification is received from the source mail server by the data movement processing unit 54 by the data movement end notification in step C5. It is also possible to determine that all data movement has ended (step C8).

  After determining that all data has been moved, the data movement processing unit 54 transmits a moved data deletion instruction for deleting data in the moved mailbox to the movement source mail server (step S8).

  When the move source mail server receives a moved data deletion instruction from the e-mail operation management device 5, the move source mail server deletes the data of the moved mailbox. As a result, the moved mailbox is deleted from the storage. Then, the movement source mail server transmits a data deletion end notification to the e-mail operation management apparatus 5 when the deletion ends (step S9).

  When receiving the data deletion end notification, the data movement processing unit 54 determines that the deletion of the data in the moved mailbox has been completed, and ends the series of processing (step S10).

<Operation / Effect of E-mail Operation Management System of this Embodiment>
As described above, in the electronic mail operation management system according to the present embodiment, the electronic mail operation management apparatus 5 collects resource information and user usage information from each of the mail servers 3A to 3n at a predetermined timing (steps S1 and S2). . Then, the e-mail operation management apparatus 5 determines whether or not the data movement of each mail server 3A to 3n is necessary based on the data usage capacity rate of each storage 4A to 4n included in the resource information collected from each mail server 3A to 3n. Determine (Step A1). Specifically, a mail server whose storage data usage capacity rate is higher than a predetermined first threshold is determined as a mail server that requires data movement. If there is a mail server determined to require data movement (step A2 / Yes), the mail server is set as the movement source mail server, and the data movement time of each mailbox of the movement source mail server is calculated (step A3). . Based on the data movement time of each mailbox, the mailbox to be moved is selected (step A4), the mailbox to be moved is distributed to the destination mail server (step A8), and the list of mailboxes to be moved is listed. Is created (step A10). Next, the e-mail operation management apparatus 5 instructs the movement source mail server to move data (step S4), and the movement source mail server moves the data of the movement target mailbox to the storage of the movement destination mail server. Is performed (step S5). The e-mail operation management system of the present embodiment can perform the series of processes at predetermined timings so that the data usage capacity ratios of the respective storages 4A to 4n are equal to or lower than the predetermined first threshold. . As a result, it is possible to avoid that the data free capacity of any one of the storages 4A to 4n is unbalanced, and to suppress the securing of the data capacity by adding a pair of mail server and storage devices. Can do. Further, it is possible to suppress the generation of cost due to the addition of the apparatus, and to suppress the increase in the scale of the entire system.

  In the above processing operation example, the processing operation example for one source mail server has been described. However, when there are a plurality of mail servers determined to be necessary for movement, the above processing operation example is performed on a plurality of movement source mail servers. However, the total data capacity of the mailboxes targeted for migration in each migration source mail server exceeds the default fifth threshold, or the number of mailboxes targeted for migration in each migration source mail server exceeds the default sixth threshold. If exceeded, the data capacity or the number of data that can be moved within the range of the predetermined data movement time zone will be exceeded. For this reason, when there are a plurality of mail servers determined to be required to move, it is necessary to make the total data capacity of the mailboxes to be moved in each source mail server the maximum value not exceeding the predetermined fifth threshold. There is. Alternatively, it is necessary that the total number of mailboxes to be moved in each movement source mail server becomes a maximum value that does not exceed the predetermined sixth threshold.

  When there are a plurality of migration source mail servers, it is preferable that the mailbox data is preferentially migrated from the migration source mail server of the storage with the highest data usage capacity ratio. The storage with the highest data usage capacity rate has the highest probability that the free data capacity of the storage will be the shortest. For this reason, it is preferable to perform data movement of mailboxes preferentially from the storage source mail server of the storage with the highest data usage capacity rate. Also, when there are multiple source mail servers, refer to the memory usage rate of each source mail server and move mailbox data preferentially from the source mail server with high memory usage rate. It is preferable to do. A mail server with a high memory usage rate has a high frequency of access to the storage, has a large amount of data and the number of data stored in the storage, and has a high probability that the data usage capacity rate of the storage will increase with time. For this reason, it is preferable to move the mailbox data preferentially from the source mail server having a high memory usage rate. As a result, data can be preferentially moved from a storage that has a high probability that the data usage capacity ratio of the storage is high. When the memory usage rate of the mail server is used, each mail server must include the memory usage rate in the resource information, and the e-mail operation management device 5 collects the memory usage rate from each mail server. become. Alternatively, each mail server includes the memory use capacity and the maximum storage capacity of the memory in the resource information, and the e-mail operation management device 5 collects the memory use capacity and the maximum storage capacity of the memory from each mail server, The memory usage rate (memory usage capacity / memory maximum storage capacity) may be calculated from the collected memory usage capacity and the maximum memory storage capacity. When there are a plurality of migration source mail servers, it is possible to determine a migration source mail server that performs data migration preferentially using the data usage capacity rate and the memory usage rate. For example, move mailbox data preferentially from the storage source mail server with the highest data usage capacity ratio, and if there are multiple source mail servers with the same data usage capacity ratio, use memory. It is also possible to preferentially move mailbox data from a source mail server having a high rate.

  In the above processing operation example, the mailbox to be moved is selected based on the data movement time of each mailbox. However, it is also possible to select a mailbox to be moved based on the attribute information of each user. Examples of the attribute information include member information (individual member, corporate member, etc.). Corporate member users tend to use email more frequently than individual member users. For this reason, if the data of the corporate member user's mailbox is moved, the mail cannot be used during the data movement. For this reason, it is preferable to select the mailbox to be moved by excluding the mailbox of the corporate member user from the mailbox to be moved. Thereby, data can be moved without causing trouble for users who frequently use mail. In order to select (or exclude) the mailboxes to be moved based on the attribute information of each user, the user attribute information corresponding to each mailbox is listed as shown in FIG. This is stored in the storage unit of the management device 5. FIG. 12 shows a list in which user information and user attribute information are associated with each other, and the list shown in FIG. 12 is stored in the storage unit of the e-mail operation management apparatus 5. The attribute information is information for specifying the attribute of each user. For example, member information (individual member, corporate member, etc.), gender information (male, woman, etc.), age information (20s, 30s, 40s). Etc.). Thereby, since the e-mail operation management apparatus 5 can use the attribute information of each user, the mailbox to be moved can be selected based on the attribute information of each user. In this case, the e-mail operation management device 5 manages the exclusion list of attribute information excluded from the mailbox to be moved, and excludes the mailbox of attribute information corresponding to the exclusion list from the mailbox to be moved. Manage the attribute information target list to be moved mailboxes, and select the mailbox to be moved based on the data move time from the attribute information mailboxes corresponding to the target list Will do. In addition, a mailbox with attribute information corresponding to the target list is preferentially made a mailbox to be moved. Also, a weighted list corresponding to the attribute information is managed, and based on the list, the data moving time is calculated by changing the weighting for the default values S, T, and U used when calculating the data moving time. It is also possible to select a mail server to be moved based on the calculated data movement time. In this case, for example, when the weight is increased for the corporate member user and the weight is decreased for the individual member user, and the data volume of the mailbox is equal to the number of data in the mailbox, the corporate It is necessary to make the list such that the data movement time of the mailbox of the member user is longer than the data movement time of the mailbox of the individual member user. As a result, the mailbox of the individual member user can be preferentially selected as the mail server to be moved over the mailbox of the corporate member user.

  In addition, the priority used as an index to be selected as a mailbox to be moved is included in the attribute information, and the weights for the default values S, T, and U used when calculating the data moving time are changed based on the priority. It is also possible to calculate the data movement time and select a mail server to be moved based on the calculated data movement time. In this case, for example, the weight is increased for a low-priority user to be selected as a movement target mailbox, and the weight is decreased for a high-priority user to be selected as a movement target mailbox. When the amount of data in the box is equal to the number of data in the mailbox, the data movement time of the low-priority user mailbox that is selected as the target mailbox is selected as the target mailbox. The list needs to be longer than the data movement time of the user's mailbox. As a result, the mailbox of the user with higher priority to be selected as the mailbox to be moved is preferentially selected as the mail server to be moved than the mailbox of the user with lower priority to be selected as the mailbox to be moved. Can be.

  In addition, the e-mail operation management device 5 selects a mailbox of a user who has a high probability of using e-mail from the mailbox to be moved based on a log when each user accesses the mailbox. It is also possible to exclude them. In this case, the log must include usage history information such as the date and time when each user accessed the mailbox. Thereby, the e-mail operation management device 5 can move the data without causing any trouble for the user who frequently uses the mail during the time of moving the data. In order to exclude the mailboxes of users who have a high probability of using mail during the data movement time period from the mailboxes to be moved, logs when each user accesses the mailboxes are stored in the mail servers 3A to 3A. In 3n, the log is included in the user usage information and transmitted to the electronic mail operation management apparatus 5. As a result, the e-mail operation management device 5 identifies the mailbox of the user who has a high probability of using the mail during the data movement time period based on the log when each user accesses the mailbox, Can be excluded from the mailbox. Note that the access frequency of each user to the mailbox can be obtained based on a log when each user accesses the mailbox. Users with high access frequency to mailboxes tend to have a higher probability of using mail more frequently than users with low access frequency to mailboxes. For this reason, if data in a mailbox of a user who frequently accesses the mailbox is moved, the mail cannot be used during the data movement. For this reason, it is preferable to select a mailbox to be moved by excluding a mailbox of a user who frequently accesses the mailbox from the mailbox to be moved. Therefore, a list of weights corresponding to the access frequency to the mailbox is managed, and based on the list, the weights for the default values S, T, and U used when calculating the data movement time are changed to change the data movement time. It is also possible to calculate. In this case, increase the weighting for users who access the mailbox frequently, and decrease the weighting for users who access the mailbox less frequently, and the mailbox data capacity and the number of mailbox data. Are equivalent to each other, it is necessary to make the list such that the data movement time of the mailbox of the user with low access frequency is shorter than the data movement time of the mailbox of the user with high access frequency. Thereby, it is possible to preferentially select a mailbox of a user whose access frequency is lower than that of a user whose access frequency is high as a mail server to be moved.

  The above-described embodiment is a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiment alone, and various modifications are made without departing from the gist of the present invention. Implementation is possible.

  For example, each of the mail servers 3A to 3n configuring the electronic mail operation management system of the above embodiment is connected in advance to storage 4A to 4n configured with an upper limit data capacity that can be processed by each of the mail servers 3A to 3n. I have decided. However, each of the mail servers 3A to 3n can be connected to a storage configured with a data capacity less than the upper limit that can be processed by each of the mail servers 3A to 3n. In this case, as time elapses, it becomes possible to add storage to each mail server 3A to 3n within the range of the upper limit data capacity that can be processed by each mail server 3A to 3n. The operation management apparatus 5 notifies the administrator's terminal of the e-mail operation management system of a warning that the storage is to be expanded if the storage can be expanded in the mail server that is determined to require data movement in the processing operation of the above embodiment. It is also possible to do so. In this case, the e-mail operation management device 5 manages the upper limit data capacity that can be processed in each mail server 3A to 3n and the data capacity of the storage currently connected to each mail server 3A to 3n. become. Thereby, the e-mail operation management device 5 can determine whether or not storage can be added to each of the mail servers 3A to 3n.

  Moreover, in the said embodiment, the electronic mail operation management apparatus 5 is collecting the data usage capacity rate of each storage 4A-4n from each mail server 3A-3n regularly. Therefore, based on the data usage capacity rate of each storage 4A-4n collected periodically, the usage capacity rate of the storage 4A-4n of the entire e-mail operation management system is managed on a time axis, and the storage usage capacity rate is It is also possible to predict the time of full (100%) and notify the administrator's terminal of the e-mail operation management system of the storage expansion time.

  In addition, the control operation in each device constituting the electronic mail operation management system of the above embodiment can be executed using hardware, software, or a combined configuration of both.

  In the case of executing processing using software, it is possible to install and execute a program in which a processing sequence is recorded in a memory in a computer incorporated in dedicated hardware. Alternatively, it can be installed in a memory in a general-purpose computer capable of executing various processes and executed.

  For example, the program can be recorded in advance on a hard disk or a ROM (Read Only Memory) as a recording medium. Alternatively, the program can be stored (recorded) temporarily or permanently in a removable recording medium. Such a removable recording medium can be provided as so-called package software. Examples of the removable recording medium include various recording media such as a magnetic disk and a semiconductor memory.

  The program is installed in the computer from the removable recording medium as described above. In addition, it is wirelessly transferred from the download site to the computer. In addition, it is transferred to a computer via a network by wire.

  The program can be used from a server on the network such as in the cloud. There may be a form in which only a part of the program is transferred to the computer.

  In addition, each device constituting the electronic mail operation management system of the above embodiment is not limited to performing processing in time series according to the processing operation described in the above embodiment. For example, it is possible to construct the processing capability of a device that executes processing, or to execute processing in parallel or individually as necessary.

  Further, the processing operation performed by the electronic mail operation management apparatus 5 of the above embodiment may be performed by the mail distribution apparatus 1, or may be performed by one mail server among the mail servers 3A to 3n.

  In the above embodiment, the e-mail operation management system shown in FIG. 3 has been described as an example. However, the technical idea of the present invention is not limited to the e-mail operation, but can be applied to various data systems that store various types of data in units of users. For example, in the storage management system shown in FIG. It is also possible to perform the same processing operation as. In this case, the data distribution apparatus 11 shown in FIG. 2 performs the same processing as the mail distribution apparatus 1 shown in FIG. Further, the data distribution information database 12 shown in FIG. 2 manages the same information as the mail distribution information database 2 shown in FIG. Further, the data servers 13A to 13n illustrated in FIG. 2 perform the same processing as the mail servers 3A to 3n illustrated in FIG. Further, the storages 14A to 14n shown in FIG. 2 store data similar to the storages 4A to 4n shown in FIG. Also, the storage management device 15 shown in FIG. 2 performs the same processing as the e-mail operation management device 5 shown in FIG. 3, and the information collection processing unit 151 shown in FIG. 2 performs the information collection processing shown in FIG. The data movement determination unit 152 shown in FIG. 2 performs the same processing as the data movement determination unit 53 shown in FIG. 6, and the data movement processing unit 153 shown in FIG. The same processing as the data movement processing unit 54 shown is performed. As a result, the technical idea described in the present embodiment is not limited to a system that stores an e-mail for each user, as shown in FIG. 3, but can be applied to a system that stores various data for each user. it can.

UE1 to UEn User terminal NW network 1 Mail distribution device 2 Mail distribution information database 3A to 3n Mail server 4A to 4n Storage 5 E-mail operation management device 51 Network interface 52 Information collection processing unit 53 Data movement determination unit 54 Data movement processing Unit 11 data distribution device 12 data distribution information database 13A-13n data server 14A-14n storage 15 storage management device 151 information collection processing unit 152 data movement determination unit 153 data movement processing unit

Claims (9)

An information collection processing unit that collects the data usage capacity rate of each storage corresponding to each of a plurality of data servers;
Based on the data usage capacity rate of each storage, a data movement determination unit that determines whether there is a storage with a data usage capacity rate higher than a default value,
Data that moves storage data with a data usage capacity rate higher than the default value to storage with a data usage capacity rate equal to or lower than the default value when there is storage with a data usage capacity rate higher than the default value by the data movement determination unit A movement processing unit;
A storage management device comprising: Each storage stores data in units of users,
The data movement determination unit
The data movement time of the data stored in the storage whose data usage capacity rate is higher than the predetermined value is calculated for each user, and the user data whose calculated data movement time is a predetermined time or less is selected as the data to be moved. ,
The data movement processing unit
The storage management apparatus according to claim 1, wherein the data of the user selected as a movement target in the data movement determination unit is moved in units of users. The information collection processing unit
Collect the data capacity and number of data stored in each storage on a user basis, on a user basis,
The data movement determination unit
The data movement time according to the data capacity and the number of data is calculated for each user based on the data capacity and the number of data collected by the information collection processing unit for each user. 2. The storage management device according to 2. The data movement determination unit
The storage management apparatus according to claim 3, wherein the data movement time is calculated by the following equation.
Data movement time = A x T + B x U
A: Data capacity (GB) collected for each user.
T: Processing time (seconds) per 1 GB of data capacity. T can be set and changed with a default value.
B: Number of data collected for each user U: Processing time (seconds) per number of data, U can be set and changed with a default value. The data movement determination unit
The data to be moved is selected from among users whose data movement time is a predetermined time or less, in order from the user with the largest data capacity, and the total data capacity is within a predetermined data capacity value. The storage management device according to any one of claims 2 to 4. The data server is a mail server;
The storage data is e-mail data, and the e-mail data is stored in a mailbox for each user of each storage. The storage management device described. A storage management system comprising a plurality of data servers, each storage corresponding to each of the data servers, and a storage management device,
The storage management device
An information collection processing unit that collects the data usage capacity rate of each storage corresponding to each of a plurality of data servers;
Based on the data usage capacity rate of each storage, a data movement determination unit that determines whether there is a storage with a data usage capacity rate higher than a default value,
Data that moves storage data with a data usage capacity rate higher than the default value to storage with a data usage capacity rate equal to or lower than the default value when there is storage with a data usage capacity rate higher than the default value by the data movement determination unit A movement processing unit;
A storage management system comprising: A control method performed by a storage management device,
An information collection process for collecting the data usage capacity rate of each storage corresponding to each of a plurality of data servers;
Based on the data usage capacity ratio of each storage, a data movement determination step of determining whether there is a storage having a data usage capacity ratio higher than a predetermined value;
When there is a storage whose data usage capacity rate is higher than the default value in the data movement determination step, data that moves storage data whose data usage capacity rate is higher than the default value to storage whose data usage capacity rate is lower than the default value A transfer processing step;
A control method characterized by comprising: An information collection process for collecting the data usage capacity rate of each storage corresponding to each of a plurality of data servers;
Based on the data usage capacity rate of each storage, a data movement determination process for determining whether there is a storage with a data usage capacity rate higher than the default value,
Data that moves storage data with a data usage capacity ratio higher than the default value to storage with a data usage capacity ratio equal to or lower than the default value when there is a storage with a data usage capacity ratio higher than the default value by the data movement determination process A program for causing a computer to execute a movement process.

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