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JPH02277141A - Duplex system - Google Patents

Duplex system

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Publication number
JPH02277141A
JPH02277141AJP1099784AJP9978489AJPH02277141AJP H02277141 AJPH02277141 AJP H02277141AJP 1099784 AJP1099784 AJP 1099784AJP 9978489 AJP9978489 AJP 9978489AJP H02277141 AJPH02277141 AJP H02277141A
Authority
JP
Japan
Prior art keywords
memory
cpu
data
peripheral control
memories
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
JP1099784A
Other languages
Japanese (ja)
Inventor
Kazuyoshi Kameyama
亀山 一好
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC CorpfiledCriticalNEC Corp
Priority to JP1099784ApriorityCriticalpatent/JPH02277141A/en
Publication of JPH02277141ApublicationCriticalpatent/JPH02277141A/en
Pendinglegal-statusCriticalCurrent

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Abstract

PURPOSE:To save time and labor to copy the contents of memories at the switch of systems by writing data into a memory of another system as well as a memory of its own system. CONSTITUTION:A working system consists of a CPU 1, a memory 2, and a CPU 4; while a spare system consists of a CPU 5, a memory 6, and a CPU 8 respectively. A common bus 3 secures connection among the CPU 1, the memory 2, and the CPU 4; while a common bus 7 secures connection among the CPU 5, the memory 6, and the CPU 8. The same form is applied between the CPU 1 and 5, the memories 2 and 6, and the CPU 4 and 8 respectively. The data written into the memory 2 is also written into the memory 6 since both memories are connected to each other via a local bus. The CPU 4 and 8 are connected to each other by a certain bus, and both systems are switched and the health check is controlled to the working system from the spare system via the bus.

Description

Translated fromJapanese

【発明の詳細な説明】(産業上の利用分野)本発明は二重化システムの改良に関し、特に系の切換え
時のメモリのデータに関する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to improvements in duplex systems, and particularly to memory data when switching systems.

(従来の技術)従来、この種の二重化システムでは系の切換え時にメモ
リ内容のデータのコピーが必要であった。
(Prior Art) Conventionally, in this type of duplex system, it has been necessary to copy data in memory when switching systems.

・”汀2図は、従来方式による二重化システムの一列を
示すブロック1凶である。第2図に訃いて、9゜13は
それぞれ中央部=11.lJi!(以後、CPUと称す
る。)、10.14はそれぞれメモリ、11゜15はそ
れぞれ共通バス、12.16はそれぞれ周辺制御装置(
以後、PCUと称する。)である。
・"Figure 2 shows block 1 showing one row of a conventional redundant system. Referring to Figure 2, 9°13 is the central part = 11.lJi! (hereinafter referred to as CPU), 10.14 are memories, 11.15 are common buses, and 12.16 are peripheral control devices (
Hereinafter, it will be referred to as PCU. ).

ここで、CPU5、メモリ・10、ならびにPCU12
は運用系を形成し、(:’pLT’13、メモリ14、
ならびにPCUI Bは待機系を形成する。
Here, CPU5, memory 10, and PCU12
forms the operational system, (:'pLT'13, memory 14,
In addition, PCUI B forms a standby system.

通常動作の場合、運用系のメモリ9の内容は待機系のメ
モリ14に反映されないので、系の切換え時にはPCU
I 2と、PCUI 8とを通してメモIJ 10の内
容をメモリ14に吸上げる必要がある。
In normal operation, the contents of the active system memory 9 are not reflected in the standby system memory 14, so when switching systems, the PCU
It is necessary to download the contents of the memo IJ 10 to the memory 14 through the PCUI 8 and the PCUI 8.

(発明が解決しようとする課題)上述した従来の二重化システムでは、系の切換え時にメ
モリ内容のデータをコピーする手間が不可欠であるとい
う欠点がある。
(Problems to be Solved by the Invention) The conventional duplex system described above has a drawback in that it is necessary to copy the data of the memory contents when switching systems.

本発明の目的は、自系のメモリにデータを書込むと同時
に1他系のメモリにもデータが書込まれるようにし、常
に自系と他系とでともにメモリ内容を同一にしておくこ
とにより上記欠点を除去し、系の切換え時にメメリ内容
をコピーする必要のないよう忙構成した二重化システム
を提供することにある。
The purpose of the present invention is to write data to the memory of one system and another system at the same time as writing data to the memory of one system, and to always keep the memory contents the same between the system and the other system. It is an object of the present invention to provide a redundant system which eliminates the above-mentioned drawbacks and is configured so that there is no need to copy memory contents when switching systems.

(課題を解決するための手段)本発明による二重化システムは第11および第2の系と
、データ送受信手段とを具備して構成したものである。
(Means for Solving the Problems) A duplex system according to the present invention includes an eleventh system, a second system, and data transmitting/receiving means.

@1の系は第1の中央処理装置と、第1のメモリと、第
1の周辺制御装置とを備え、第1の共通パスにより相互
KWe続して構成したものである。
The system @1 includes a first central processing unit, a first memory, and a first peripheral control unit, and is configured to be connected to each other by a first common path.

第2の系はfa2の中央処理装置と、第2のメモリと、
第1の周辺制御装置に接続されていて第1の周辺制御装
置との間で運用/待機系の切換えを行うことができる第
2の周辺制御装置とを備え、@2の共通パスにより相互
に接続して構成し九ものである。
The second system includes a central processing unit of fa2, a second memory,
and a second peripheral control device that is connected to the first peripheral control device and can switch between active and standby systems with the first peripheral control device, and mutually communicate via @2 common path. There are nine things that can be connected and configured.

データ送受信手段は、第1(あるいは第2)のメモリに
データを書込むと、同時に第2(あるいは第1)のメモ
リにデータが書込まれるように1第1および第2のメモ
リの相互間で制限なくデータを授受するためのものであ
る。
The data transmitting/receiving means transmits data between the first and second memories so that when data is written to the first (or second) memory, the data is written to the second (or first) memory at the same time. It is used to send and receive data without restrictions.

(実権例)次に1本発明について図面を参照して説明する。(Example of actual power)Next, one embodiment of the present invention will be explained with reference to the drawings.

第1図は、本発明による二重化システムの一実施例を示
すブロック図である。
FIG. 1 is a block diagram showing an embodiment of a duplex system according to the present invention.

第1図において、1.sはそれぞれCPU、2゜8はそ
れぞれメモリ、3.7はそれぞれ共通パス、4.8はそ
れぞれPCUである。
In FIG. 1, 1. s is a CPU, 2.8 is a memory, 3.7 is a common path, and 4.8 is a PCU.

第1図において、CPU1、メモリ2、ならびにPCU
4は運用系を形成し、CPU5、メモリ8、ならびにP
CUSは待機系を形成する。共通パス3はCPUIと、
メモリ2と、PCU4とを相互に接続し、共通パス7は
CPU6と、メモリBと、PCU8とを相互に接続する
In FIG. 1, CPU 1, memory 2, and PCU
4 forms the operational system, which includes the CPU 5, memory 8, and P
CUS forms a standby system. Common path 3 is CPUI,
The memory 2 and the PCU 4 are interconnected, and the common path 7 interconnects the CPU 6, the memory B, and the PCU 8.

CPUIとCPU5とは同じ形式のものであり、メモリ
2とメモリ8とは同じ形式のものであり、PCU4とP
CU8とは同じ形式のものである。
CPUI and CPU5 are of the same format, memory 2 and memory 8 are of the same format, and PCU4 and PCU5 are of the same format.
It is of the same format as CU8.

メモリ2,6は相互にローカルパスによって接続されて
いるため、メモリ2に書込まれたデータはメモリ8にも
書込まれる。PCU4とPCUIIとは、同らかのパス
を介して相互に接続されており、このパスにより系の切
換えや、待機系から運用系へのヘルスチェックが制御さ
れる。
Since memories 2 and 6 are connected to each other by a local path, data written to memory 2 is also written to memory 8. The PCU 4 and the PCU II are connected to each other via the same path, and this path controls system switching and health checks from the standby system to the active system.

通常の場合、運用系のメモリ2と待機系のメモリBとの
内容は一致しているので、即座に系を切換えることがで
きる。
Normally, the contents of the active memory 2 and the standby memory B are the same, so the systems can be switched immediately.

(発明の効果)以上説明したように本発明は、自系のメモリにデータを
書込むと同時に、他系のメモリにもデータが書込まれる
ようにすることにより、系の切換え時にメモリの内容を
コピーする手間を省く仁とができるという効果がある。
(Effects of the Invention) As explained above, the present invention allows data to be written to the memory of the other system at the same time as data is written to the memory of the own system. This has the effect of saving you the trouble of copying.

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

第1図は、本発明による二重化システムの一実施例を示
すブロック図である。第2図は、従来技術による二重化システムの一列を示す
ブロック図である。1.5,9.13・・・CPU2.8.1G、14・拳・メモリ!、7,11,15・番・共通パス4.8.12.18−Φ・PCU特許出頌人 日本電気株式会社代理人 弁理士 井ノ ロ    壽
FIG. 1 is a block diagram showing an embodiment of a duplex system according to the present invention. FIG. 2 is a block diagram showing one row of a duplex system according to the prior art. 1.5, 9.13...CPU 2.8.1G, 14・Fist・Memory! , 7, 11, 15・Common path 4.8.12.18-Φ・PCU Patent issuer: NEC Corporation Representative Patent attorney: Hisashi Inoro

Claims (1)

Translated fromJapanese
【特許請求の範囲】[Claims]第1の中央処理装置、第1のメモリ、ならびに第1の周
辺制御装置を備え、第1の共通バスにより相互に接続し
て構成した第1の系と、第2の中央処理装置、第2のメ
モリ、ならびに前記第1の周辺制御装置に接続されてい
て前記第1の周辺制御装置との間で運用/待機の系の切
換えを行うことができる第2の周辺制御装置を備え、第
2の共通バスにより相互に接続して構成した第2の系と
、前記第1あるいは第2のメモリにデータを書込むと、
同時に前記第2あるいは第1のメモリにデータが書込ま
れるように前記第1および第2のメモリの相互間で制限
なくデータを授受するためのデータ送受信手段とを具備
して構成したことを特徴とする二重化システム。
A first system comprising a first central processing unit, a first memory, and a first peripheral control unit, which are interconnected by a first common bus, a second central processing unit, and a second peripheral control unit; a second peripheral control device connected to the first peripheral control device and capable of switching between active and standby systems with the first peripheral control device; When data is written to the second system connected to each other by a common bus and the first or second memory,
It is characterized by comprising a data transmitting/receiving means for transmitting and receiving data between the first and second memories without restriction so that data is simultaneously written to the second or first memory. A redundant system.
JP1099784A1989-04-181989-04-18Duplex systemPendingJPH02277141A (en)

Priority Applications (1)

Application NumberPriority DateFiling DateTitle
JP1099784AJPH02277141A (en)1989-04-181989-04-18Duplex system

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
JP1099784AJPH02277141A (en)1989-04-181989-04-18Duplex system

Publications (1)

Publication NumberPublication Date
JPH02277141Atrue JPH02277141A (en)1990-11-13

Family

ID=14256567

Family Applications (1)

Application NumberTitlePriority DateFiling Date
JP1099784APendingJPH02277141A (en)1989-04-181989-04-18Duplex system

Country Status (1)

CountryLink
JP (1)JPH02277141A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPS5920884U (en)*1982-07-281984-02-08日本ビクター株式会社 Tank cleaning device
JPS6475727A (en)*1987-09-161989-03-22Toto LtdWashhand basin

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPS5920884U (en)*1982-07-281984-02-08日本ビクター株式会社 Tank cleaning device
JPS6475727A (en)*1987-09-161989-03-22Toto LtdWashhand basin

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