JP2003122611A - Data providing method and server device - Google Patents
Data providing method and server deviceInfo
- Publication number
- JP2003122611A JP2003122611A JP2001313621A JP2001313621A JP2003122611A JP 2003122611 A JP2003122611 A JP 2003122611A JP 2001313621 A JP2001313621 A JP 2001313621A JP 2001313621 A JP2001313621 A JP 2001313621A JP 2003122611 A JP2003122611 A JP 2003122611A
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- JP
- Japan
- Prior art keywords
- data
- update
- providing
- updated
- utilization
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、データ利用装置に
データを提供するデータ提供方法及び装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data providing method and device for providing data to a data utilizing device.
【０００２】[0002]
【従来の技術】データをネットワークの複数のノードに
分散して利用する形態が広く行われている。かかる形態
が採られるのは、データを１つのノードに集中設置して
多数の使用者の要求全てに応えることは、処理能力及び
通信能力の面で不利だからである。利用者からのデータ
要求のトラヒックが分散される分散形態は、利用者に円
滑なデータ提供をなし得ると期待される。しかし、かか
る分散形態では一方で、ネットワークに分散配置された
データを維持管理するシステムが必要となり、データの
元本となるべきデータを保持し各ＤＢサーバのデータを
適宜更新する機能が求められる。その場合、元のデータ
に更新があった場合に複数のＤＢサーバ上のデータの同
期、即ち、各分散データベースにある同一のデータを如
何に等しく且つ時機に遅れることなく更新するかが問題
となる。2. Description of the Related Art A form in which data is distributed to a plurality of nodes of a network and used is widely used. This form is adopted because it is disadvantageous in terms of processing capability and communication capability to centrally install data in one node and meet all the requests of many users. The distributed form in which the traffic of data requests from users is distributed is expected to provide smooth data provision to users. However, on the other hand, in such a distributed mode, a system for maintaining and managing data distributed and arranged in a network is required, and a function of holding data to be a principal of data and appropriately updating data of each DB server is required. In that case, when the original data is updated, the problem is how to synchronize the data on multiple DB servers, that is, how to update the same data in each distributed database equally and without delay. .
【０００３】そこで、特開２０００−１０５７４４号
は、データの同期を図る分散型データベースシステムを
開示している。かかるシステムでは、管理ホストがＤＢ
サーバへの通信路の状態及び更新が必要か否かの情報を
含むサーバ更新管理情報テーブルを有する。そして、各
ＤＢサーバのデータを更新する際に、該管理ホストが該
サーバ更新管理情報テーブルを参照して、通信が可能且
つ更新が必要なＤＢサーバに向けてのみ更新に必要な情
報を送信する。Therefore, Japanese Patent Laid-Open No. 2000-105744 discloses a distributed database system for synchronizing data. In such a system, the management host is a DB
It has a server update management information table including information on the state of the communication path to the server and whether or not update is necessary. Then, when updating the data of each DB server, the management host refers to the server update management information table and transmits the information necessary for updating only to the DB server that can communicate and needs updating. .
【０００４】しかし、かかる技術では、各ＤＢサーバの
データの更新が管理ホストの主導によりなされて、ＤＢ
サーバ、即ちデータ利用装置側の処理サイクルからして
更新が望ましくない場合にも更新が強制されてしまう問
題があった。例えば、更新データをデータ利用者装置側
において何時何分から従来のものから切り替えたい等の
個別の要請が有る場合に不都合が存在した。However, in this technique, the management host takes the initiative in updating the data in each DB server, and
There is a problem that the update is forced even when the update is not desirable from the processing cycle of the server, that is, the data utilization device side. For example, there is an inconvenience when there is an individual request for switching the update data from the conventional one on the data user device side.
【０００５】[0005]
【発明が解決しようとする課題】そこで、本発明の目的
は、データ利用装置が自律的にデータの更新をなすこと
を可能としてデータの同期をなすデータ提供方法及びサ
ーバ装置を提供することである。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a data providing method and a server apparatus that enable a data utilizing apparatus to autonomously update data and synchronize the data. .
【０００６】[0006]
【課題を解決するための手段】本発明によるデータ提供
方法は、更新処理の管理下にある複数種類のデータ片を
データ利用装置に提供するデータ提供方法であり、該複
数種類のデータ片を該データ利用装置毎に群分けして保
持するデータ保持ステップと、該データ片の更新に応じ
て、更新後データ片が属する該データ利用装置に対応す
る装置識別子を保持する装置識別子保持ステップと、外
部からの指示に応じて、該保持された装置識別子を検索
して、対応するデータ利用装置に更新通知をなす通知ス
テップと、該データ利用装置からの要求に応じて、該更
新後データ片を提供する提供ステップとを含むことを特
徴とする。A data providing method according to the present invention is a data providing method for providing a data utilization apparatus with a plurality of types of data pieces under the control of update processing. A data holding step of grouping and holding each data using apparatus; a device identifier holding step of holding a device identifier corresponding to the data using apparatus to which the updated data piece belongs in accordance with the update of the data piece; In response to an instruction from the device, retrieves the held device identifier and notifies the corresponding data utilization device of the update, and provides the updated data piece in response to a request from the data utilization device. And a providing step of
【０００７】本発明によるデータ提供サーバ装置は、更
新処理の管理下にある複数種類のデータ片をデータ利用
装置に提供するデータ提供サーバ装置であり、該複数種
類のデータ片を該データ利用装置毎に群分けして保持す
るデータ保持手段と、該データ片の更新に応じて、更新
後データ片が属する該データ利用装置に対応する装置識
別子を保持する装置識別子保持手段と、外部からの指示
に応じて、該保持された装置識別子を検索して、対応す
るデータ利用装置に更新通知をなす通知手段と、該デー
タ利用装置からの要求に応じて、該更新後データ片を提
供する提供手段とを含むことを特徴とする。A data providing server device according to the present invention is a data providing server device that provides a plurality of types of data pieces under the control of update processing to a data utilization device, and the plurality of types of data fragments are provided for each data utilization device. Data holding means for grouping and holding the data pieces, a device identifier holding means for holding a device identifier corresponding to the data utilizing apparatus to which the updated data piece belongs in response to the update of the data piece, and an external instruction. Accordingly, a notification means for searching the held device identifier and making an update notification to the corresponding data utilizing device, and a providing means for providing the updated data piece in response to a request from the data utilizing device. It is characterized by including.
【０００８】[0008]
【発明の実施の形態】本発明の実施例について添付の図
面を参照して詳細に説明する。図１は、本発明の実施例
であり、データ提供装置を含むシステム構成を示してい
る。ここで、データ提供装置１とデータ利用装置３ａ乃
至３ｃがＴＣＰ／ＩＰ網２を介して接続される。データ
提供装置１とデータ利用装置３ａ乃至３ｃとの通信は、
ＴＣＰ／ＩＰ網２の通信プロトコルにおける所定のコマ
ンドを用いて行う。データ提供装置１と、データ利用装
置３ａ乃至３ｃの各々とは、コンピュータハードウェア
及びソフトウェアにより実現され得る。Embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an embodiment of the present invention and shows a system configuration including a data providing device. Here, the data providing apparatus 1 and the data utilizing apparatuses 3a to 3c are connected via the TCP / IP network 2. The communication between the data providing device 1 and the data using devices 3a to 3c is
It is performed using a predetermined command in the communication protocol of the TCP / IP network 2. The data providing device 1 and each of the data utilizing devices 3a to 3c can be realized by computer hardware and software.
【０００９】データ提供装置１は、データベースを形成
するデータ４ａ乃至４ｃと更新通知テーブル５とを含
み、これらは、磁気記憶装置等の記憶装置（図示せず）
に記憶され保持される。データ提供装置１は、通常、デ
ータ利用装置３ａ乃至３ｃからのデータ要求に随時応じ
て、該要求に対応するデータ４ａ乃至４ｃを提供する。
データ提供装置１は、又、外部からの指示、例えば操作
者の指令に基づいてデータの更新を行う機能を有し、更
に、同様に外部からの指示に基づいてデータ利用装置３
ａ乃至３ｃへ更新通知を一括して送信する機能を有す
る。The data providing apparatus 1 includes data 4a to 4c forming a database and an update notification table 5, which are storage devices (not shown) such as a magnetic storage device.
Stored and retained in. The data providing device 1 normally provides the data 4a to 4c corresponding to the data request from the data using devices 3a to 3c at any time.
The data providing device 1 also has a function of updating data based on an instruction from the outside, for example, a command from an operator, and similarly, the data using device 3 based on the instruction from the outside.
It has a function of collectively transmitting update notifications to a to 3c.
【００１０】データ利用装置３ａ乃至３ｃの各々は、デ
ータ提供装置１により提供されるデータ４ａ乃至４ｃを
各々取り込み、それぞれに要求される業務処理を実行す
る。この場合、データ４ａ乃至４ｃの各々は、磁気記憶
装置等の記憶装置（図示せず）に保存されて利用され
る。図２は、図１に示されるデータ提供装置において用
いられるデータ管理構造を示している。データ４ａ乃至
４ｃの各々は、複数のデータ利用装置３ａ乃至３ｃの各
々に対応して別々に管理される。即ち、データ利用装置
３ａ乃至３ｃのそれぞれに群分けされて保有され、例え
ば、データ利用装置３ｃについて見ると、対応するデー
タ４ｃには、複数種類からなるデータ項目名に対応して
複数のデータが各々１対１の関係で格納される。先頭の
項目名を「装置識別子」とし、対応するデータにはデー
タ利用装置３ｃの装置識別子が格納される。かかる装置
識別子は、ＴＣＰ／ＩＰ網２においてデータ利用装置３
ａ乃至３ｃを一意に識別可能な情報であれば良く、例え
ば、ＴＣＰ／ＩＰ網におけるノードアドレスをそのまま
用いても良い。本実施例においては図１及び２に示され
るように、データ提供装置１をserver.xxx.or.jpとし、
データ利用装置３ａ乃至３ｃの各々を、client_a.xxx.o
r.jp、client_b.xxx.or.jp及びclient_c.xxx.or.jpとし
ている。Each of the data utilizing devices 3a to 3c fetches the data 4a to 4c provided by the data providing device 1 and executes the business processing required for each. In this case, each of the data 4a to 4c is stored and used in a storage device (not shown) such as a magnetic storage device. FIG. 2 shows a data management structure used in the data providing apparatus shown in FIG. Each of the data 4a to 4c is separately managed corresponding to each of the plurality of data utilization devices 3a to 3c. That is, each of the data use devices 3a to 3c is grouped and held. For example, regarding the data use device 3c, the corresponding data 4c includes a plurality of data items corresponding to data item names of a plurality of types. Each is stored in a one-to-one relationship. The head item name is "device identifier", and the device identifier of the data utilizing device 3c is stored in the corresponding data. The device identifier is used by the data utilization device 3 in the TCP / IP network 2.
Any information that can uniquely identify a to 3c may be used, and for example, the node address in the TCP / IP network may be used as it is. In this embodiment, as shown in FIGS. 1 and 2, the data providing device 1 is server.xxx.or.jp,
Client_a.xxx.o for each of the data use devices 3a to 3c
r.jp, client_b.xxx.or.jp and client_c.xxx.or.jp.
【００１１】一方、項目名には「データＡ」、「データ
Ｂ」の如くデータの名称が設定され、対応するデータに
各々、例えば、１１１１、２２２２の如く格納される。
従って、データ４ａ乃至４ｃに格納されるデータは、デ
ータ利用者装置の装置識別子及び項目名をキーとした更
新処理される。又、利用者装置の識別子がキーとして用
いられることから、項目名に格納されるべきデータの名
称は複数の利用者装置に亘って重複した設定ができる。On the other hand, data names such as "data A" and "data B" are set in the item names, and the corresponding data are stored as 1111 and 2222, respectively.
Therefore, the data stored in the data 4a to 4c is updated using the device identifier and item name of the data user device as keys. Further, since the identifier of the user device is used as a key, the name of the data to be stored in the item name can be set to be duplicated among a plurality of user devices.
【００１２】更新通知テーブル５は、更新されたデータ
の項目名に関係付けられて、更新通知対象となるデータ
利用装置の装置識別子が格納される。ここでは、「デー
タＡ」が更新されたとして、それを通知すべきデータ利
用装置３ｃの装置識別子client_c.xxx.or.jpが設定され
ている。同様に、「データＤ」についてデータ利用装置
３ａの装置識別子client_a.xxx.or.jpとデータ利用装置
３ｃの装置識別子client_c.xxx.or.jpの２つが設定され
ている。即ち、データ名称「データＤ」のデータが、デ
ータ利用装置３ａ及び３ｃの両方について重複して利用
されていて、且つ、更新されていることを示している。
以後、かかる更新通知テーブル５が保持されていること
から、データ提供装置１は、更新通知をなすべきデータ
利用装置がどれであるかを更新通知時に一括して認識す
ることができる。The update notification table 5 is associated with the item name of the updated data and stores the device identifier of the data utilizing device to be the update notification target. Here, assuming that "data A" has been updated, the device identifier client_c.xxx.or.jp of the data using device 3c to be notified of it is set. Similarly, for "data D", two device identifiers client_a.xxx.or.jp of the data utilizing device 3a and device identifier client_c.xxx.or.jp of the data utilizing device 3c are set. That is, it is indicated that the data of the data name “data D” is used in duplicate for both the data use devices 3a and 3c and is updated.
After that, since the update notification table 5 is held, the data providing apparatus 1 can collectively recognize which data utilization apparatus should perform the update notification at the time of the update notification.
【００１３】図３は、図１に示されるデータ提供装置に
おける処理手順を示している。通常、データ利用装置３
ａ乃至３ｃ、例えばデータ利用装置３ｃがデータ提供装
置１に対して目的のデータを要求すると（ステップＳ
１）、これに応じてデータ提供装置１は、当該データを
データ４ｃから読み出してデータ利用装置３ｃに送信す
る（ステップＳ２）。データ利用装置３ｃはこれを受信
して、自身のデータ記憶媒体に保存して利用する（ステ
ップＳ３）。FIG. 3 shows a processing procedure in the data providing apparatus shown in FIG. Normally, the data utilization device 3
a to 3c, for example, the data utilization device 3c requests the target data from the data providing device 1 (step S
1) In response to this, the data providing apparatus 1 reads the data from the data 4c and transmits it to the data using apparatus 3c (step S2). The data use device 3c receives this, stores it in its own data storage medium, and uses it (step S3).
【００１４】次にデータの更新要求が発生した場合、例
えば、操作者から指令入力等の外部からの指示に基づい
て、データ提供装置１は、データ４ａ乃至４ｃのうちの
更新対象データを更新処理する（ステップＳ４）。この
場合、データの更新指示は、キー情報として、装置識別
子及びデータの項目名を指定して行う。そして、更新通
知テーブル５における更新済みのデータの項目名に更新
通知を要するデータ利用装置の識別子を関係付ける（ス
テップＳ５）。この場合、図２のデータ管理構造に示さ
れるように当該更新後データに関係付けられている全て
のデータ利用装置（データ利用装置３ａ乃至３ｃの何れ
か又は複数）が更新通知対象のデータ利用装置になる。When a data update request is generated next, the data providing apparatus 1 updates the update target data of the data 4a to 4c, for example, based on an instruction from the outside such as a command input from the operator. Yes (step S4). In this case, the data update instruction is performed by designating the device identifier and the item name of the data as the key information. Then, the item name of the updated data in the update notification table 5 is associated with the identifier of the data using device requiring the update notification (step S5). In this case, as shown in the data management structure of FIG. 2, all the data utilization devices (any or a plurality of the data utilization devices 3a to 3c) associated with the updated data are the data utilization devices subject to update notification. become.
【００１５】次に、データ提供装置１は、例えば、操作
者の指令入力等の外部からの指示に応じて、更新通知を
すべきデータ利用装置の装置識別子を更新通知テーブル
５から検索する（ステップＳ６）。次いで、検索された
データ利用装置、この例ではデータ利用装置３ｃに向け
て更新通知を送信する（ステップＳ７）。次に、更新通
知を受信したデータ利用装置３ｃは、自身の処理の進捗
に応じて、適宜のタイミングにおいて、データ要求をデ
ータ提供装置１に発信する（ステップＳ８）。これに応
じて、データ提供装置１は、当該更新後データをデータ
利用装置３ｃに向けて送信する（ステップＳ９）。この
データを受信したデータ利用装置３ｃは、自身が前から
保持していたデータを当該更新後データに置き換えて、
即ち更新して利用する（ステップＳ１０）。Next, the data providing device 1 searches the update notification table 5 for the device identifier of the data using device to which the update notification is to be issued, for example, in response to an external instruction such as a command input by the operator (step). S6). Next, the update notification is transmitted to the retrieved data use device, in this example, the data use device 3c (step S7). Next, the data utilization device 3c that has received the update notification transmits a data request to the data providing device 1 at an appropriate timing according to the progress of its processing (step S8). In response to this, the data providing apparatus 1 transmits the updated data to the data utilizing apparatus 3c (step S9). Upon receiving this data, the data utilization device 3c replaces the data it previously held with the updated data,
That is, it is updated and used (step S10).
【００１６】以上のように、本実施例によれば、データ
提供装置におけるデータ更新と各データ利用装置におけ
るデータ更新との同期は、更新通知を契機としてなされ
る。この更新通知は、更新されたデータに関係付けられ
た複数のデータ利用装置に対して一括して送信可能であ
る。従って、データの同期にかかわるデータ提供装置と
データ利用装置との間でより少ないトラヒックによりデ
ータの同期が達成される。そして、データ利用装置側
は、かかる更新通知を受領後に、更新データに切り替え
るべき利用開始時間に応じたタイミングでデータをデー
タ提供装置から取り込み利用することが可能となる。As described above, according to this embodiment, the synchronization of the data update in the data providing apparatus and the data update in each data utilizing apparatus is triggered by the update notification. This update notification can be collectively transmitted to a plurality of data utilization devices associated with the updated data. Therefore, data synchronization is achieved with less traffic between the data providing device and the data utilizing device involved in data synchronization. Then, after receiving the update notification, the data utilizing apparatus side can fetch and utilize the data from the data providing apparatus at a timing corresponding to the utilization start time at which the data should be switched to the updated data.
【００１７】尚、本実施例におけるデータ提供装置は、
インターネット等のネットワークを介したサーバシステ
ムとして、データ利用装置を通常のパーソナルコンピュ
ータによるクライアントとした構成でも良い。又、デー
タ提供装置が管理及び提供するデータの構成は、図２に
示される如き単純なデータ構造に限られず、関係データ
ベース（ＲＤＭＳ）の如きに多様なデータベースが使用
可能であり、データ利用装置の装置識別子がキーとして
データに関係付けられていれば良い。又、データ利用装
置の数は、本実施例に限られず、多数のデータ利用装置
が用いられ得る。The data providing apparatus in this embodiment is
As a server system via a network such as the Internet, the data utilization device may be a client using a normal personal computer. Further, the structure of data managed and provided by the data providing apparatus is not limited to the simple data structure shown in FIG. 2, and various databases such as a relational database (RDMS) can be used, The device identifier may be associated with the data as a key. Further, the number of data utilization devices is not limited to this embodiment, and a large number of data utilization devices can be used.
【００１８】[0018]
【発明の効果】以上のように、本発明のよるデータ提供
方法及びサーバ装置によれば、複数のデータ利用装置に
一括して送信されるデータ更新通知に応じて、データ利
用装置が自律的にデータの更新をすることが可能とな
る。即ち、データ利用装置側は、自身の処理の進捗に応
じて適宜の時点でデータ更新が可能となる。As described above, according to the data providing method and the server device of the present invention, the data utilization device autonomously operates in response to the data update notification collectively transmitted to the plurality of data utilization devices. It becomes possible to update the data. That is, the data utilizing apparatus side can update the data at an appropriate time according to the progress of its processing.
【図１】本発明の実施例であり、データ提供装置を含む
システム構成を示しているブロック図である。FIG. 1 is a block diagram showing a system configuration including a data providing apparatus according to an embodiment of the present invention.
【図２】図１に示されるデータ提供装置において用いら
れるデータ管理構造を示しているブロック図である。2 is a block diagram showing a data management structure used in the data providing apparatus shown in FIG. 1. FIG.
【図３】図１に示されるデータ提供装置における処理手
順を示しているフローチャートである。FIG. 3 is a flowchart showing a processing procedure in the data providing apparatus shown in FIG.
１ データ提供装置（ＤＢサーバ） ２ ＴＣＰ／ＩＰ網 ３ａ乃至３ｃ データ利用装置 ４ａ乃至４ｃ データ ５ 更新通知テーブル 1 Data providing device (DB server) 2 TCP / IP network 3a to 3c data utilization device 4a to 4c data 5 Update notification table
Claims (2)
タ片をデータ利用装置に提供するデータ提供方法であっ
て、 前記複数種類のデータ片を前記データ利用装置毎に群分
けして保持するデータ保持ステップと、 前記データ片の更新に応じて、更新後データ片が属する
前記データ利用装置に対応する装置識別子を保持する装
置識別子保持ステップと、 外部からの指示に応じて、前記保持された装置識別子を
検索して、対応するデータ利用装置に更新通知をなす通
知ステップと、 前記データ利用装置からの要求に応じて、前記更新後デ
ータ片を提供する提供ステップと、 を含むことを特徴とするデータ提供方法。1. A data providing method of providing a plurality of types of data pieces under the control of an update process to a data utilization apparatus, wherein the plurality of types of data pieces are grouped and held for each data utilization apparatus. A data holding step, a device identifier holding step of holding a device identifier corresponding to the data utilization device to which the updated data piece belongs in response to the update of the data piece, and the held in response to an external instruction A notification step of retrieving a device identifier and making an update notification to the corresponding data utilizing device; and a providing step of providing the updated data piece in response to a request from the data utilizing device. How to provide data.
タ片をデータ利用装置に提供するデータ提供サーバ装置
であって、 前記複数種類のデータ片を前記データ利用装置毎に群分
けして保持するデータ保持手段と、 前記データ片の更新に応じて、更新後データ片が属する
前記データ利用装置に対応する装置識別子を保持する装
置識別子保持手段と、 外部からの指示に応じて、前記保持された装置識別子を
検索して、対応するデータ利用装置に更新通知をなす通
知手段と、 前記データ利用装置からの要求に応じて、前記更新後デ
ータ片を提供する提供手段と、 を含むことを特徴とするデータ提供サーバ装置。2. A data providing server device for providing a data utilization device with a plurality of types of data fragments under the control of update processing, wherein the plurality of types of data fragments are grouped and retained for each data utilization device. Data holding means, a device identifier holding means for holding a device identifier corresponding to the data utilization device to which the updated data piece belongs in response to the update of the data piece, and the held in accordance with an instruction from the outside. And a notification unit that notifies the corresponding data utilization device of an update, and a providing unit that provides the updated data piece in response to a request from the data utilization device. Data providing server device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001313621A JP2003122611A (en) | 2001-10-11 | 2001-10-11 | Data providing method and server device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001313621A JP2003122611A (en) | 2001-10-11 | 2001-10-11 | Data providing method and server device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003122611A true JP2003122611A (en) | 2003-04-25 |
Family
ID=19132064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001313621A Pending JP2003122611A (en) | 2001-10-11 | 2001-10-11 | Data providing method and server device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003122611A (en) |
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