WO2003042816A3 - Entry locking for large data structures - Google Patents

Entry locking for large data structures Download PDF

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Publication number
WO2003042816A3
WO2003042816A3 PCT/IB2002/004531 IB0204531W WO03042816A3 WO 2003042816 A3 WO2003042816 A3 WO 2003042816A3 IB 0204531 W IB0204531 W IB 0204531W WO 03042816 A3 WO03042816 A3 WO 03042816A3
Authority
WO
WIPO (PCT)
Prior art keywords
entry
value
hashed value
hashed
large data
Prior art date
Application number
PCT/IB2002/004531
Other languages
French (fr)
Other versions
WO2003042816A2 (en
Inventor
Jan Hoogerbrugge
Paul Stravers
Original Assignee
Koninkl Philips Electronics Nv
Jan Hoogerbrugge
Paul Stravers
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 Koninkl Philips Electronics Nv, Jan Hoogerbrugge, Paul Stravers filed Critical Koninkl Philips Electronics Nv
Priority to EP02777701A priority Critical patent/EP1449076A2/en
Priority to AU2002339651A priority patent/AU2002339651A1/en
Priority to US10/494,823 priority patent/US7051136B2/en
Priority to JP2003544583A priority patent/JP2005509944A/en
Publication of WO2003042816A2 publication Critical patent/WO2003042816A2/en
Publication of WO2003042816A3 publication Critical patent/WO2003042816A3/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/46—Multiprogramming arrangements
    • G06F9/52—Program synchronisation; Mutual exclusion, e.g. by means of semaphores
    • G06F9/526—Mutual exclusion algorithms
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99931—Database or file accessing
    • Y10S707/99938—Concurrency, e.g. lock management in shared database

Abstract

The invention is based on the idea that for a large data structure with N entries, memory space for the locks corresponding to said entries can be saved by performing a hashing function on a value that represents an entry into a hashed value 1 to M. This hashed value is used to index the table of M locks. The value of M is typically much smaller than the value of N thereby reducing memory space requirements. If M is chosen large enough and a good hashing function is selected problems with collisions will be very small. Additionally, problems relating to deadlock occurring, when the hashed value of a second entry equals the hashed value of the a first entry, are being addressed by swapping said hashed values of said first and second entry, when the hashed value of the second entry is smaller than the hashed value of the first entry.
PCT/IB2002/004531 2001-11-13 2002-10-28 Entry locking for large data structures WO2003042816A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP02777701A EP1449076A2 (en) 2001-11-13 2002-10-28 Entry locking for large data structures
AU2002339651A AU2002339651A1 (en) 2001-11-13 2002-10-28 Entry locking for large data structures
US10/494,823 US7051136B2 (en) 2001-11-13 2002-10-28 Entry locking for large data structures
JP2003544583A JP2005509944A (en) 2001-11-13 2002-10-28 Entry lock for large data structures

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP01204330 2001-11-13
EP01204330.3 2001-11-13

Publications (2)

Publication Number Publication Date
WO2003042816A2 WO2003042816A2 (en) 2003-05-22
WO2003042816A3 true WO2003042816A3 (en) 2004-03-18

Family

ID=8181224

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2002/004531 WO2003042816A2 (en) 2001-11-13 2002-10-28 Entry locking for large data structures

Country Status (6)

Country Link
US (1) US7051136B2 (en)
EP (1) EP1449076A2 (en)
JP (1) JP2005509944A (en)
CN (1) CN1266602C (en)
AU (1) AU2002339651A1 (en)
WO (1) WO2003042816A2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7370048B2 (en) * 2005-05-27 2008-05-06 International Business Machines Corporation File storage method and apparatus
US8862639B1 (en) 2006-09-28 2014-10-14 Emc Corporation Locking allocated data space
US7756831B1 (en) * 2006-09-28 2010-07-13 Emc Corporation Cooperative locking between multiple independent owners of data space
US9454536B1 (en) 2006-09-28 2016-09-27 Emc Corporation Space compaction and defragmentation mechanisms in data space
US7647466B1 (en) * 2006-09-28 2010-01-12 Emc Corporation Linear space allocation mechanisms in data space
US7526623B1 (en) * 2006-09-28 2009-04-28 Emc Corporation Optimizing reclamation of data space
US8533158B1 (en) 2006-09-28 2013-09-10 Emc Corporation Reclaiming data space by rewriting metadata
US7660956B1 (en) * 2007-01-08 2010-02-09 Emc Corporation Save set bundling for staging
US7822927B1 (en) * 2007-05-14 2010-10-26 Emc Corporation Dynamically configurable reverse DNLC lookup
WO2015165077A1 (en) * 2014-04-30 2015-11-05 Oracle International Corporation System and method for providing distributed transaction lock in transactional middleware machine environment
CN110706101B (en) * 2019-08-30 2021-06-29 创新先进技术有限公司 Method and apparatus for concurrently executing transactions in a blockchain

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4480304A (en) * 1980-10-06 1984-10-30 International Business Machines Corporation Method and means for the retention of locks across system, subsystem, and communication failures in a multiprocessing, multiprogramming, shared data environment

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01303527A (en) * 1988-05-31 1989-12-07 Hitachi Ltd Control method for shared resources
US5339427A (en) * 1992-03-30 1994-08-16 International Business Machines Corporation Method and apparatus for distributed locking of shared data, employing a central coupling facility
US5737611A (en) * 1996-04-05 1998-04-07 Microsoft Corporation Methods for dynamically escalating locks on a shared resource
US6360220B1 (en) * 1998-08-04 2002-03-19 Microsoft Corporation Lock-free methods and systems for accessing and storing information in an indexed computer data structure having modifiable entries
US6529905B1 (en) * 2000-01-11 2003-03-04 Frontline Solutions, Inc. Method and system for allowing multiple users to edit a hierarchical data structure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4480304A (en) * 1980-10-06 1984-10-30 International Business Machines Corporation Method and means for the retention of locks across system, subsystem, and communication failures in a multiprocessing, multiprogramming, shared data environment

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"HIERARCHICAL LATCHING METHOD -- SPLITTING LOCKS/LATCHES TO INCREASECONCURRENCY", IBM TECHNICAL DISCLOSURE BULLETIN, IBM CORP. NEW YORK, US, vol. 33, no. 10A, 1 March 1991 (1991-03-01), pages 30 - 32, XP000109947, ISSN: 0018-8689 *

Also Published As

Publication number Publication date
CN1266602C (en) 2006-07-26
AU2002339651A1 (en) 2003-05-26
WO2003042816A2 (en) 2003-05-22
US7051136B2 (en) 2006-05-23
CN1610884A (en) 2005-04-27
EP1449076A2 (en) 2004-08-25
US20040267745A1 (en) 2004-12-30
JP2005509944A (en) 2005-04-14

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