JPS56152063A - Common storage control system - Google Patents
Common storage control systemInfo
- Publication number
- JPS56152063A JPS56152063A JP5508080A JP5508080A JPS56152063A JP S56152063 A JPS56152063 A JP S56152063A JP 5508080 A JP5508080 A JP 5508080A JP 5508080 A JP5508080 A JP 5508080A JP S56152063 A JPS56152063 A JP S56152063A
- Authority
- JP
- Japan
- Prior art keywords
- processors
- memory
- access
- common
- copying operation
- 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
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/14—Handling requests for interconnection or transfer
- G06F13/16—Handling requests for interconnection or transfer for access to memory bus
- G06F13/18—Handling requests for interconnection or transfer for access to memory bus based on priority control
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
- Hardware Redundancy (AREA)
- Multi Processors (AREA)
Abstract
PURPOSE:To prevent a system from lowering of the processing performance, by performing access operation and storage copying operation in time division mode from plural processors to a doubled common memory constituting stand-by spare ones. CONSTITUTION:Doubled common memories 10 and 11, which can be switched at any time, as stand-by spare ones are accessible to processors 1-4 via storage controllers 12 and 13 in common. Controllers 12 and 13 are equipped with copying control parts 14 and 15 which control the copying operation of equalizing the contents of common memories 10 and 11 to each other under the command of processor 1, and contention circuits 16 and 17 which compare and select memory access of each processor with that of control parts 14 and 15, and memory access parts 18 and 19. When the copying operation of the memory and memory access from processors 2-4 are executed, circuits 16 and 17 compare access from control parts 14 and 15 with that from processors 2-4, word by word, to select one preferentially and access the memory in time-division mode. Consequently, the queuing and stopping of the processors are eliminated and the lowering of the processing performance is prevented.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5508080A JPS56152063A (en) | 1980-04-25 | 1980-04-25 | Common storage control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5508080A JPS56152063A (en) | 1980-04-25 | 1980-04-25 | Common storage control system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56152063A true JPS56152063A (en) | 1981-11-25 |
Family
ID=12988719
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5508080A Pending JPS56152063A (en) | 1980-04-25 | 1980-04-25 | Common storage control system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56152063A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01109453A (en) * | 1987-10-23 | 1989-04-26 | Hitachi Ltd | Storage area duplicating system |
JPH01134646A (en) * | 1987-11-20 | 1989-05-26 | Fujitsu Ltd | Exchanging memory control system |
JPH03148737A (en) * | 1989-11-06 | 1991-06-25 | Nippon Telegr & Teleph Corp <Ntt> | Memory data coincidence control system for duplex memory device |
US5890218A (en) * | 1990-09-18 | 1999-03-30 | Fujitsu Limited | System for allocating and accessing shared storage using program mode and DMA mode |
-
1980
- 1980-04-25 JP JP5508080A patent/JPS56152063A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01109453A (en) * | 1987-10-23 | 1989-04-26 | Hitachi Ltd | Storage area duplicating system |
JPH01134646A (en) * | 1987-11-20 | 1989-05-26 | Fujitsu Ltd | Exchanging memory control system |
JPH03148737A (en) * | 1989-11-06 | 1991-06-25 | Nippon Telegr & Teleph Corp <Ntt> | Memory data coincidence control system for duplex memory device |
US5890218A (en) * | 1990-09-18 | 1999-03-30 | Fujitsu Limited | System for allocating and accessing shared storage using program mode and DMA mode |
US5963976A (en) * | 1990-09-18 | 1999-10-05 | Fujitsu Limited | System for configuring a duplex shared storage |
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