GB2300937B - Data access apparatus and distributed data base system - Google Patents
Data access apparatus and distributed data base systemInfo
- Publication number
- GB2300937B GB2300937B GB9615696A GB9615696A GB2300937B GB 2300937 B GB2300937 B GB 2300937B GB 9615696 A GB9615696 A GB 9615696A GB 9615696 A GB9615696 A GB 9615696A GB 2300937 B GB2300937 B GB 2300937B
- Authority
- GB
- United Kingdom
- Prior art keywords
- access apparatus
- base system
- distributed data
- data base
- data access
- 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.)
- Expired - Fee Related
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
- G06F11/2053—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where persistent mass storage functionality or persistent mass storage control functionality is redundant
- G06F11/2056—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where persistent mass storage functionality or persistent mass storage control functionality is redundant by mirroring
- G06F11/2087—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where persistent mass storage functionality or persistent mass storage control functionality is redundant by mirroring with a common controller
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
- G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
- G06F11/1076—Parity data used in redundant arrays of independent storages, e.g. in RAID systems
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
- G11B20/1833—Error detection or correction; Testing, e.g. of drop-outs by adding special lists or symbols to the coded information
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/002—Programmed access in sequence to a plurality of record carriers or indexed parts, e.g. tracks, thereof, e.g. for editing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/40—Combinations of multiple record carriers
- G11B2220/41—Flat as opposed to hierarchical combination, e.g. library of tapes or discs, CD changer, or groups of record carriers that together store one title
- G11B2220/415—Redundant array of inexpensive disks [RAID] systems
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Multi Processors (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
- Hardware Redundancy (AREA)
Abstract
In a distributed data-base system, an access apparatus 90 is coupled by a network 91 to a manager sub-system 70 and a plurality of member sub-systems 80, 81 managed by the manager sub-system in response to requests from the access apparatus 90.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP06094870A JP3085085B2 (en) | 1994-05-09 | 1994-05-09 | Data access device and distributed database system |
GB9508941A GB2289355B (en) | 1994-05-09 | 1995-05-02 | Data access apparatus and distributed data base system |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9615696D0 GB9615696D0 (en) | 1996-09-04 |
GB2300937A GB2300937A (en) | 1996-11-20 |
GB2300937B true GB2300937B (en) | 1997-08-20 |
Family
ID=26306970
Family Applications (5)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9615689A Expired - Fee Related GB2300935B (en) | 1994-05-09 | 1995-05-02 | Data access apparatus and distributed data base system |
GB9615697A Expired - Fee Related GB2301209B (en) | 1994-05-09 | 1995-05-02 | Data access apparatus and distributed data base system |
GB9615690A Expired - Fee Related GB2300936B (en) | 1994-05-09 | 1995-05-02 | Data access apparatus and distributed data base system |
GB9615696A Expired - Fee Related GB2300937B (en) | 1994-05-09 | 1995-05-02 | Data access apparatus and distributed data base system |
GB9615615A Expired - Fee Related GB2301208B (en) | 1994-05-09 | 1995-05-02 | Data access apparatus and distributed data base system |
Family Applications Before (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9615689A Expired - Fee Related GB2300935B (en) | 1994-05-09 | 1995-05-02 | Data access apparatus and distributed data base system |
GB9615697A Expired - Fee Related GB2301209B (en) | 1994-05-09 | 1995-05-02 | Data access apparatus and distributed data base system |
GB9615690A Expired - Fee Related GB2300936B (en) | 1994-05-09 | 1995-05-02 | Data access apparatus and distributed data base system |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9615615A Expired - Fee Related GB2301208B (en) | 1994-05-09 | 1995-05-02 | Data access apparatus and distributed data base system |
Country Status (1)
Country | Link |
---|---|
GB (5) | GB2300935B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8572137B2 (en) | 2009-09-08 | 2013-10-29 | International Business Machines Corporation | Data de-duplication in a distributed network |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2207264A (en) * | 1987-06-23 | 1989-01-25 | Mitsubishi Electric Corp | Data processing system |
GB2235798A (en) * | 1989-08-31 | 1991-03-13 | Mitsubishi Electric Corp | Join processor for relational database |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2232256A5 (en) * | 1973-05-29 | 1974-12-27 | Labo Cent Telecommunicat | |
GB2230626A (en) * | 1989-04-20 | 1990-10-24 | Croftlands Ltd | Computerised database system |
US5408608A (en) * | 1989-09-14 | 1995-04-18 | Fujitsu Limited | Distributed data base control center having a plurality of information tables for facilitating a direct communication among terminal units of a network |
US5185884A (en) * | 1990-01-24 | 1993-02-09 | International Business Machines Corporation | Computer controlled optimized pairing of disk units |
US5452445A (en) * | 1992-04-30 | 1995-09-19 | Oracle Corporation | Two-pass multi-version read consistency |
GB2273183A (en) * | 1992-12-04 | 1994-06-08 | Ibm | Replicated distributed databases. |
JPH06290099A (en) * | 1993-03-24 | 1994-10-18 | Internatl Business Mach Corp <Ibm> | Method for storage management and subsystem therefor |
JP3170095B2 (en) * | 1993-04-14 | 2001-05-28 | 富士通株式会社 | Information retrieval system |
-
1995
- 1995-05-02 GB GB9615689A patent/GB2300935B/en not_active Expired - Fee Related
- 1995-05-02 GB GB9615697A patent/GB2301209B/en not_active Expired - Fee Related
- 1995-05-02 GB GB9615690A patent/GB2300936B/en not_active Expired - Fee Related
- 1995-05-02 GB GB9615696A patent/GB2300937B/en not_active Expired - Fee Related
- 1995-05-02 GB GB9615615A patent/GB2301208B/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2207264A (en) * | 1987-06-23 | 1989-01-25 | Mitsubishi Electric Corp | Data processing system |
GB2235798A (en) * | 1989-08-31 | 1991-03-13 | Mitsubishi Electric Corp | Join processor for relational database |
Also Published As
Publication number | Publication date |
---|---|
GB2300935B (en) | 1997-08-20 |
GB2300935A (en) | 1996-11-20 |
GB9615615D0 (en) | 1996-09-04 |
GB2301208B (en) | 1997-08-20 |
GB2301208A (en) | 1996-11-27 |
GB9615697D0 (en) | 1996-09-04 |
GB2300936B (en) | 1997-08-20 |
GB2301209B (en) | 1997-08-20 |
GB9615696D0 (en) | 1996-09-04 |
GB2300936A (en) | 1996-11-20 |
GB9615690D0 (en) | 1996-09-04 |
GB2300937A (en) | 1996-11-20 |
GB9615689D0 (en) | 1996-09-04 |
GB2301209A (en) | 1996-11-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
746 | Register noted 'licences of right' (sect. 46/1977) |
Effective date: 20000127 |
|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20020502 |