JP2001051859A - Load information communication method - Google Patents

Load information communication method

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Publication number
JP2001051859A
JP2001051859A JP11227352A JP22735299A JP2001051859A JP 2001051859 A JP2001051859 A JP 2001051859A JP 11227352 A JP11227352 A JP 11227352A JP 22735299 A JP22735299 A JP 22735299A JP 2001051859 A JP2001051859 A JP 2001051859A
Authority
JP
Japan
Prior art keywords
server
transaction
processing
load information
load
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11227352A
Other languages
Japanese (ja)
Inventor
Yuichi Hara
裕一 原
Takeshi Sakimoto
壮 崎本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11227352A priority Critical patent/JP2001051859A/en
Publication of JP2001051859A publication Critical patent/JP2001051859A/en
Pending legal-status Critical Current

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  • Multi Processors (AREA)
  • Computer And Data Communications (AREA)

Abstract

PROBLEM TO BE SOLVED: To improve the throughput of the whole dynamic load decentralization system by reducing the line load accompanying a communication of load information and decreasing the number of dynamic steps needed for transmission and reception processing. SOLUTION: By this communicating method, an allocation server 20 distributes a transaction from a terminal 30 by a distributing means 201 to a process server 10 according to a distributing index table 205, and the process server stores the transaction into a storage means 101, processes the transaction and sends the process result to an answer massage transmitting means 105, which adds load information to the process result by referring to a table 104 to generate and sends an answer message to the allocation server. The allocation server receives the answer message by a receiving means 202, sends the process result to the terminal by a transmitting means 203, and updates the distribution index table by an update means 204 according to the load information; and then a measuring means 207 measures an answer message reception interval and when the interval of reception from one process server is larger than a fixed value, a means 206 generates and transmits a health checking transaction to the process server.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、複数の端末からト
ランザクションを受信して、複数の処理サーバへ各処理
サーバの負荷状況に応じてトランザクションを分配し、
処理サーバから応答メッセージを受信して、トランザク
ションの入力元端末にその処理結果を送信する振分けサ
ーバを有する動的負荷分散システムに関し、特に各処理
サーバの負荷情報を振分けサーバへ効率的に連絡を行う
ための負荷情報連絡方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention receives a transaction from a plurality of terminals and distributes the transaction to a plurality of processing servers according to the load status of each processing server.
A dynamic load distribution system having a distribution server that receives a response message from a processing server and transmits the processing result to the input terminal of the transaction, and in particular, efficiently communicates load information of each processing server to the distribution server. Load information communication method.

【0002】[0002]

【従来の技術】従来、この種の負荷情報連絡方法では、
各処理サーバの負荷情報を一定間隔毎に振分けサーバに
対して送信していた。なお、本発明に対する従来の技術
については、特開平10−27168号広報(メッセー
ジ動的負荷分散方式)に記載がある。また、負荷情報連
絡をせずに、振分けサーバにおいて、トランザクション
の現実行数(振分け数と処理完了数の差)から負荷状況
を把握していた。
2. Description of the Related Art Conventionally, in this type of load information communication method,
The load information of each processing server has been transmitted to the distribution server at regular intervals. The prior art for the present invention is described in Japanese Patent Application Laid-Open No. Hei 10-27168 (message dynamic load distribution method). Further, the load status is grasped from the current number of executed transactions (the difference between the number of distributions and the number of completed processes) in the distribution server without notifying the load information.

【0003】[0003]

【発明が解決しようとする課題】上述した従来の技術の
問題点は、各処理サーバから振分けサーバに対する負荷
情報連絡に伴う回線負荷と、送受信処理に要するダイナ
ミックステップ数が増加するという問題があった。ま
た、振分けサーバにおいて、負荷状況を把握する方法で
は、バッチ処理等による処理サーバの負荷が判断できな
いため、最適な負荷分散が行われないという問題があっ
た。本発明の目的は、上記の問題を解決し、負荷情報の
連絡に伴う回線負荷と、送受信処理に要するダイナミッ
クステップ数を削減し、動的負荷分散システム全体とし
ての処理効率を向上させることである。
The problems of the prior art described above are that the line load associated with the load information communication from each processing server to the distribution server and the number of dynamic steps required for transmission / reception processing increase. . Further, in the method of determining the load status in the distribution server, the load on the processing server due to the batch processing or the like cannot be determined, so that there is a problem that the optimum load distribution is not performed. An object of the present invention is to solve the above-described problems, reduce the line load associated with the communication of load information, reduce the number of dynamic steps required for transmission / reception processing, and improve the processing efficiency of the entire dynamic load distribution system. .

【0004】[0004]

【課題を解決するための手段】上記目的を達成するた
め、本発明は、複数の端末からトランザクションを受信
して、複数の処理サーバへ各処理サーバの負荷状況に応
じてトランザクションを分配し、処理サーバから応答メ
ッセージを受信して、トランザクションの入力元端末に
その処理結果を送信する振分けサーバを有する動的負荷
分散システムにおける負荷情報連絡方法であり、前記各
処理サーバは、前記トランザクションの処理結果に処理
サーバの負荷情報を付加して応答メッセージを作成し、
該応答メッセージを前記振分けサーバに送信することに
より各処理サーバの負荷情報を前記振分けサーバへ通知
するようにしている。
In order to achieve the above object, according to the present invention, a transaction is received from a plurality of terminals, and the transaction is distributed to a plurality of processing servers according to the load status of each processing server. A load information communication method in a dynamic load distribution system having a distribution server that receives a response message from a server and transmits a processing result to an input source terminal of a transaction. Create a response message by adding the load information of the processing server,
By transmitting the response message to the distribution server, load information of each processing server is notified to the distribution server.

【0005】さらに、前記振分けサーバは、前記処理サ
ーバからの応答メッセージが予め定めた一定時間を越え
ても受信されないとき、ヘルスチェック用のトランザク
ションを生成して該処理サーバに送信するようにしてい
る。
[0005] Further, the distribution server generates a health check transaction and transmits it to the processing server when a response message from the processing server is not received within a predetermined period of time. .

【0006】[0006]

【発明の実施の形態】以下、本発明の実施例を図1を参
照して説明する。図1は、本発明の負荷情報連絡方法が
適用される動的負荷分散システムの構成を示すブロック
図である。図1の動的負荷分散システムは、複数の端末
30と、並列動作する複数の処理サーバ10と、振分け
サーバ20とを含んで構成される。また、処理サーバ1
0は、トランザクション格納手段101と、トランザク
ション処理手段102と、負荷測定手段103と、負荷
情報格納テーブル104と、応答メッセージ送信手段1
05と、処理サーバ名称107とを有する。処理サーバ
名称107は、各処理サーバ10でユニークとなる名称
により表現する。負荷情報格納テーブル104は、負荷
情報106により構成される。負荷情報106は、処理
サーバ10の負荷状況を表現する。また、振分けサーバ
20は、トランザクション分配手段201と、応答メッ
セージ受信手段202と、処理結果送信手段203と、
分配指標更新手段204と、分配指標表205と、ヘル
スチェック手段206と、応答メッセージ受信間隔計測
手段207を有する。分配指標表205は、処理サーバ
名称208と、負荷情報209により構成される。処理
サーバ名称208は、当該テーブルと処理サーバ10と
の対応を判断するための情報である。負荷情報209
は、当該テーブルに対応する処理サーバ10の負荷状況
を表現する。図に示す矢線は情報の流れを表わしたもの
である。なお、ヘルスチェックとは、通信相手に異常が
発生したり、通信回線や中継装置などの障害により通信
ができなくなったことを検出するために、正常性を確認
する制御情報を送信し、相手の応答により正常を確認す
ることである。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a block diagram showing the configuration of a dynamic load distribution system to which the load information communication method of the present invention is applied. 1 includes a plurality of terminals 30, a plurality of processing servers 10 operating in parallel, and a distribution server 20. Also, the processing server 1
0 indicates a transaction storage unit 101, a transaction processing unit 102, a load measurement unit 103, a load information storage table 104, and a response message transmission unit 1
05 and a processing server name 107. The processing server name 107 is represented by a name that is unique for each processing server 10. The load information storage table 104 includes load information 106. The load information 106 represents a load status of the processing server 10. Further, the distribution server 20 includes a transaction distribution unit 201, a response message reception unit 202, a processing result transmission unit 203,
It has a distribution index updating unit 204, a distribution index table 205, a health check unit 206, and a response message reception interval measuring unit 207. The distribution index table 205 includes a processing server name 208 and load information 209. The processing server name 208 is information for determining the correspondence between the table and the processing server 10. Load information 209
Represents the load status of the processing server 10 corresponding to the table. Arrows shown in the figure indicate the flow of information. A health check is a process in which control information for confirming normality is transmitted to detect that an error has occurred in the communication partner or that communication has been disabled due to a failure in the communication line or relay device. It is to confirm normality by response.

【0007】図2は、応答メッセージの内容を示す図で
ある。図2において、応答メッセージ400は、処理サ
ーバ名称401と、負荷情報402と、処理結果403
とを含んで構成される。図3は、振分けサーバ20が端
末30からトランザクションを受信した時の処理を示す
図である。図4は、処理サーバ10が振分けサーバ20
からトランザクションを受信した時の処理を示す図であ
る。図5は、各処理サーバ10が起動時に実行を開始
し、終了するまで常に実行している負荷情報測定処理を
示す図である。図6は、振分けサーバ20が処理サーバ
10から応答メッセージ400を受信した時の処理を示
す図である。図7は、各処理サーバ10から振分けサー
バ20への応答メッセージ受信間隔が一定時間を超えた
時に、振分けサーバ20が行う処理を示す図である。
FIG. 2 shows the contents of the response message. 2, a response message 400 includes a processing server name 401, load information 402, and a processing result 403.
It is comprised including. FIG. 3 is a diagram illustrating processing when the distribution server 20 receives a transaction from the terminal 30. FIG. 4 shows that the processing server 10
FIG. 10 is a diagram showing a process when a transaction is received from a. FIG. 5 is a diagram illustrating a load information measurement process in which each processing server 10 starts execution at the time of startup and is constantly executing until the processing ends. FIG. 6 is a diagram illustrating a process when the distribution server 20 receives the response message 400 from the processing server 10. FIG. 7 is a diagram illustrating processing performed by the distribution server 20 when a response message reception interval from each processing server 10 to the distribution server 20 exceeds a predetermined time.

【0008】次に、本発明の動作について図3と、図4
と、図5と、図6と、図7とを用いて詳細に説明する。
振分けサーバ20が端末30からトランザクションを受
信した時は、(1)の処理を行う。 (1)トランザクション分配手段201が、端末30か
らトランザクションを受信し(ステップ501)、分配
指標表205に基づいてトランザクションを送信する処
理サーバ10を決定し(ステップ502)、送信する
(ステップ503)。 処理サーバ10が振分けサーバ
20からトランザクションを受信した時は、(2)〜
(6)の処理を行う。 (2)トランザクション格納手段101が、振分けサー
バ20からトランザクションを受信する(ステップ50
4)。 (3)トランザクション処理手段102が、受信したト
ランザクションがヘルスチェック用のトランザクション
であるか判定する(ステップ505)。 (4)ステップ505の結果、ヘルスチェックでない場
合は、トランザクション処理手段102が、そのトラン
ザクションに対応する処理を行い、処理結果を応答メッ
セージ送信手段105に渡す(ステップ506)。 (5)ステップ505の結果、ヘルスチェックである場
合は、トランザクション処理手段102が、処理サーバ
10の起動状態を処理結果として応答メッセージ送信手
段105に渡す(ステップ507)。 (6)応答メッセージ送信手段105が、処理サーバ名
称107と、負荷情報格納テーブル104に格納されて
いる負荷情報106と、トランザクション処理手段10
2から受け取った処理結果とを組み立てた応答メッセー
ジ400を作成し(ステップ508)、振分けサーバに
送信する(ステップ509)。
Next, the operation of the present invention will be described with reference to FIGS.
5, FIG. 6, FIG. 6, and FIG. 7 will be described in detail.
When the distribution server 20 receives the transaction from the terminal 30, the processing of (1) is performed. (1) The transaction distribution unit 201 receives a transaction from the terminal 30 (step 501), determines the processing server 10 to which the transaction is to be transmitted based on the distribution index table 205 (step 502), and transmits it (step 503). When the processing server 10 receives a transaction from the distribution server 20, (2)-
The processing of (6) is performed. (2) The transaction storage unit 101 receives a transaction from the distribution server 20 (step 50).
4). (3) The transaction processing means 102 determines whether the received transaction is a health check transaction (step 505). (4) If the result of step 505 is not a health check, the transaction processing means 102 performs processing corresponding to the transaction, and passes the processing result to the response message transmitting means 105 (step 506). (5) If the result of step 505 is health check, the transaction processing means 102 passes the activation state of the processing server 10 to the response message transmitting means 105 as a processing result (step 507). (6) The response message transmitting unit 105 executes the processing server name 107, the load information 106 stored in the load information storage table 104, and the transaction processing unit 10.
A response message 400 is created by assembling the processing results received from the server 2 (step 508) and transmitted to the distribution server (step 509).

【0009】処理サーバ10が起動すると、処理サーバ
は、(7)〜(11)の処理を行う。 (7)負荷測定手段103が、処理サーバ10の負荷を
測定し(ステップ510)、負荷情報を負荷情報格納テ
ーブル104に格納する(ステップ511)。 (8)負荷測定手段103が、処理サーバ10の終了要
求があるか判定する(ステップ512)。 (9)ステップ512の結果、終了要求がある場合は、
負荷測定手段103が、処理を終了する。 (10)ステップ512の結果、終了要求がない場合
は、負荷測定手段103が、一定間隔待つ(ステップ5
13)。 (11)(7)の処理に戻る。
When the processing server 10 is started, the processing server performs the processes (7) to (11). (7) The load measuring unit 103 measures the load of the processing server 10 (Step 510), and stores the load information in the load information storage table 104 (Step 511). (8) The load measuring unit 103 determines whether there is a request to end the processing server 10 (Step 512). (9) If there is a termination request as a result of step 512,
The load measuring unit 103 ends the processing. (10) As a result of Step 512, if there is no end request, the load measuring means 103 waits for a fixed interval (Step 5).
13). (11) Return to the process of (7).

【0010】振分けサーバ20が処理サーバ10から応
答メッセージを受信した時は、(12)〜(15)の処
理を行う。 (12)応答メッセージ受信手段202が、処理サーバ
10からの応答メッセージ400を受信する(ステップ
514)。 (13)応答メッセージ受信手段202が、応答メッセ
ージ400を解析し、処理結果403がヘルスチェック
の処理結果であるかを判定する(ステップ515)。 (14)ステップ515の結果、端末から入力されたト
ランザクションの処理結果の場合は、処理結果送信手段
203が、応答メッセージ400に含まれる処理結果4
03を、トランザクション入力元の端末30に送信する
(ステップ516)。 (15)分配指標更新手段204が、応答メッセージ4
00に含まれる処理サーバ名称401と一致する、分配
指標表205を構成する処理サーバ名称208に対応す
る負荷情報209を、応答メッセージ400に含まれる
負荷情報402により更新する(ステップ517)。
When the distribution server 20 receives the response message from the processing server 10, the processes (12) to (15) are performed. (12) The response message receiving means 202 receives the response message 400 from the processing server 10 (Step 514). (13) The response message receiving unit 202 analyzes the response message 400 and determines whether the processing result 403 is a processing result of the health check (Step 515). (14) If the result of step 515 is that the transaction result is a transaction result input from the terminal, the processing result transmitting means 203 sends the processing result 4 included in the response message 400
03 is transmitted to the transaction input source terminal 30 (step 516). (15) The distribution index updating means 204 sets the response message 4
The load information 209 corresponding to the processing server name 208 included in the distribution index table 205 that matches the processing server name 401 included in the response message 400 is updated with the load information 402 included in the response message 400 (step 517).

【0011】応答メッセージ受信間隔計測手段207
は、応答メッセージ受信手段で受信する処理サーバ10
からの応答メッセージの受信状況を監視し、各処理サー
バ10毎に応答メッセージを受信する時間間隔を計測
し、この時間間隔が定義済みの限界値を超えた場合に、
該当する処理サーバ名称をヘルスチェック手段206に
送信し(16)の処理を行う。 (16)ヘルスチェック手段206が、ヘルスチェック
用のトラザクションを生成し(ステップ518)、応答
メッセージ受信間隔計測手段207から受信した処理サ
ーバ名称に対応する処理サーバ10へ送信する(ステッ
プ520)。
Response message receiving interval measuring means 207
Is a processing server 10 that is received by the response message receiving means.
And monitors the reception status of the response message from the server, measures the time interval for receiving the response message for each processing server 10, and when the time interval exceeds a defined limit value,
The corresponding processing server name is transmitted to the health check unit 206, and the process of (16) is performed. (16) The health check unit 206 generates a transaction for health check (step 518) and transmits it to the processing server 10 corresponding to the processing server name received from the response message reception interval measuring unit 207 (step 520).

【0012】[0012]

【発明の効果】本発明によれば、負荷情報の連絡だけを
行う通信を削減できるので、回線負荷と送受信処理に要
するダイナミックステップ数が削減されて、動的負荷分
散システム全体としての処理効率を向上する効果があ
る。
According to the present invention, it is possible to reduce the number of dynamic steps required for transmission / reception processing, because the communication for only communicating load information can be reduced, and the processing efficiency of the entire dynamic load distribution system can be reduced. There is an effect of improving.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の負荷情報連絡方法が適用される動的負
荷分散システムの構成を示すブロック図である。
FIG. 1 is a block diagram showing a configuration of a dynamic load distribution system to which a load information communication method according to the present invention is applied.

【図2】応答メッセージの内容を示す図である。FIG. 2 is a diagram showing the contents of a response message.

【図3】振分けサーバで行うトランザクション振分け処
理の流れを示す図である。
FIG. 3 is a diagram showing a flow of a transaction distribution process performed by the distribution server.

【図4】処理サーバで行うトランザクション処理の流れ
を示す図である。
FIG. 4 is a diagram showing a flow of a transaction process performed by the processing server.

【図5】処理サーバで行う負荷情報測定処理の流れを示
す図である。
FIG. 5 is a diagram illustrating a flow of a load information measurement process performed by the processing server.

【図6】振分けサーバで行う応答処理の流れを示す図で
ある。
FIG. 6 is a diagram showing a flow of a response process performed by the distribution server.

【図7】振分けサーバで行うヘルスチェック処理の流れ
を示す図である。
FIG. 7 is a diagram showing a flow of a health check process performed by the distribution server.

【符号の説明】[Explanation of symbols]

10 処理サーバ 20 振分けサーバ 30 端末 101 トランザクション格納手段 102 トランザクション処理手段 103 負荷測定手段 104 負荷情報格納テーブル 105 応答メッセージ送信手段 106 負荷情報 107 処理サーバ名称 201 トランザクション分配手段 202 応答メッセージ受信手段 203 処理結果送信手段 204 分配指標更新手段 205 分配指標表 206 ヘルスチェック手段 207 応答メッセージ受信間隔計測手段 208 処理サーバ名称 209 負荷情報 400 応答メッセージ 401 処理サーバ名称 402 負荷情報 403 処理結果 DESCRIPTION OF SYMBOLS 10 Processing server 20 Distribution server 30 Terminal 101 Transaction storage means 102 Transaction processing means 103 Load measurement means 104 Load information storage table 105 Response message transmission means 106 Load information 107 Processing server name 201 Transaction distribution means 202 Response message reception means 203 Processing result transmission Means 204 Distribution index updating means 205 Distribution index table 206 Health check means 207 Response message reception interval measuring means 208 Processing server name 209 Load information 400 Response message 401 Processing server name 402 Load information 403 Processing result

フロントページの続き Fターム(参考) 5B042 GA12 GA36 GA39 GB01 GC10 JJ23 5B045 BB49 GG02 JJ05 5B089 GA11 GA21 JA13 JB14 KA06 KA07 KC47 KC60 MA03 MA07 5B098 AA09 AA10 GB01 GB11 GC08 GC10 GC16 GD02 GD12 GD14Continued on the front page F term (reference) 5B042 GA12 GA36 GA39 GB01 GC10 JJ23 5B045 BB49 GG02 JJ05 5B089 GA11 GA21 JA13 JB14 KA06 KA07 KC47 KC60 MA03 MA07 5B098 AA09 AA10 GB01 GB11 GC08 GC10 GC16 GD02 GD12

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 複数の端末からトランザクションを受信
して、複数の処理サーバへ各処理サーバの負荷状況に応
じてトランザクションを分配し、処理サーバから応答メ
ッセージを受信して、トランザクションの入力元端末に
その処理結果を送信する振分けサーバを有する動的負荷
分散システムにおける負荷情報連絡方法であって、 前記各処理サーバは、前記トランザクションの処理結果
に処理サーバの負荷情報を付加して応答メッセージを作
成し、該応答メッセージを前記振分けサーバに送信する
ことにより各処理サーバの負荷情報を前記振分けサーバ
へ通知することを特徴とする負荷情報連絡方法。
A transaction is received from a plurality of terminals, the transaction is distributed to a plurality of processing servers in accordance with the load status of each processing server, a response message is received from the processing server, and the transaction input source terminal is transmitted to the processing server. A load information communication method in a dynamic load distribution system having a distribution server transmitting the processing result, wherein each of the processing servers creates a response message by adding load information of the processing server to a processing result of the transaction. And transmitting the response message to the distribution server to notify the distribution server of the load information of each processing server.
【請求項2】 請求項1記載の負荷情報連絡方法におい
て、 前記振分けサーバは、前記処理サーバからの応答メッセ
ージが予め定めた一定時間を越えても受信されないと
き、ヘルスチェック用のトランザクションを生成して該
処理サーバに送信することを特徴とする負荷情報連絡方
法。
2. The load information communication method according to claim 1, wherein the distribution server generates a health check transaction when a response message from the processing server is not received within a predetermined time. And transmitting the load information to the processing server.
JP11227352A 1999-08-11 1999-08-11 Load information communication method Pending JP2001051859A (en)

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