GB9615696D0 - Data access apparatus and distributed data base system - Google Patents

Data access apparatus and distributed data base system

Info

Publication number
GB9615696D0
GB9615696D0 GBGB9615696.3A GB9615696A GB9615696D0 GB 9615696 D0 GB9615696 D0 GB 9615696D0 GB 9615696 A GB9615696 A GB 9615696A GB 9615696 D0 GB9615696 D0 GB 9615696D0
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.)
Granted
Application number
GBGB9615696.3A
Other versions
GB2300937B (en
GB2300937A (en
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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
Priority claimed from JP06094870A external-priority patent/JP3085085B2/en
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of GB9615696D0 publication Critical patent/GB9615696D0/en
Publication of GB2300937A publication Critical patent/GB2300937A/en
Application granted granted Critical
Publication of GB2300937B publication Critical patent/GB2300937B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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.
GB9615696A 1994-05-09 1995-05-02 Data access apparatus and distributed data base system Expired - Fee Related GB2300937B (en)

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 true GB9615696D0 (en) 1996-09-04
GB2300937A GB2300937A (en) 1996-11-20
GB2300937B GB2300937B (en) 1997-08-20

Family

ID=26306970

Family Applications (5)

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
GB9615696A Expired - Fee Related GB2300937B (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
GB9615689A Expired - Fee Related GB2300935B (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 Before (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

Family Applications After (3)

Application Number Title Priority Date Filing Date
GB9615697A Expired - Fee Related GB2301209B (en) 1994-05-09 1995-05-02 Data access apparatus and distributed data base system
GB9615689A Expired - Fee Related GB2300935B (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

Country Status (1)

Country Link
GB (5) GB2301208B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
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

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2232256A5 (en) * 1973-05-29 1974-12-27 Labo Cent Telecommunicat
US5058002A (en) * 1987-06-23 1991-10-15 Mitsubishi Denki Kabushiki Kaisha Page splitting method and apparatus for a database stored in a plurality of memory storage units
GB2230626A (en) * 1989-04-20 1990-10-24 Croftlands Ltd Computerised database system
JPH07104871B2 (en) * 1989-08-31 1995-11-13 三菱電機株式会社 Join processing method in relational database
EP0443038B1 (en) * 1989-09-14 1997-07-30 Fujitsu Limited Temporary center system in a decentralized data base system
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

Also Published As

Publication number Publication date
GB9615615D0 (en) 1996-09-04
GB2300937B (en) 1997-08-20
GB2301208A (en) 1996-11-27
GB2301208B (en) 1997-08-20
GB2300935B (en) 1997-08-20
GB2301209A (en) 1996-11-27
GB9615689D0 (en) 1996-09-04
GB9615697D0 (en) 1996-09-04
GB2300935A (en) 1996-11-20
GB2300936B (en) 1997-08-20
GB2300937A (en) 1996-11-20
GB2301209B (en) 1997-08-20
GB2300936A (en) 1996-11-20
GB9615690D0 (en) 1996-09-04

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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