WO2005052784A3 - Semi-static parity distribution technique - Google Patents

Semi-static parity distribution technique Download PDF

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Publication number
WO2005052784A3
WO2005052784A3 PCT/US2004/039618 US2004039618W WO2005052784A3 WO 2005052784 A3 WO2005052784 A3 WO 2005052784A3 US 2004039618 W US2004039618 W US 2004039618W WO 2005052784 A3 WO2005052784 A3 WO 2005052784A3
Authority
WO
WIPO (PCT)
Prior art keywords
parity
semi
disks
technique
array
Prior art date
Application number
PCT/US2004/039618
Other languages
French (fr)
Other versions
WO2005052784A2 (en
Inventor
Peter F Corbett
Robert M English
Steven R Kleiman
Original Assignee
Network Appliance Inc
Peter F Corbett
Robert M English
Steven R Kleiman
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 Network Appliance Inc, Peter F Corbett, Robert M English, Steven R Kleiman filed Critical Network Appliance Inc
Priority to JP2006541726A priority Critical patent/JP2007516524A/en
Priority to AU2004294208A priority patent/AU2004294208B2/en
Priority to KR1020067010172A priority patent/KR101148697B1/en
Priority to CA2546242A priority patent/CA2546242C/en
Priority to EP04812189A priority patent/EP1687707B1/en
Priority to CN200480034712XA priority patent/CN101023412B/en
Publication of WO2005052784A2 publication Critical patent/WO2005052784A2/en
Priority to IL175829A priority patent/IL175829A/en
Publication of WO2005052784A3 publication Critical patent/WO2005052784A3/en

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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
    • G06F11/08—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
    • 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
    • G06F11/1096—Parity calculation or recalculation after configuration or reconfiguration of the system
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring

Abstract

A semi-static distribution technique distributes parity across disks of an array. According to the technique, parity is distributed (assigned) across the disks of the array in a manner that maintains a fixed pattern of parity blocks among the stripes of the disks. When one or more disks are added to the array, the semi-static technique redistributes parity in a way that does not require recalculation of parity or moving of any data blocks. Notably, the parity information is not actually moved; the technique merely involves a change in the assignment (or reservation) for some of the parity blocks of each pre-existing disk to the newly added disk.
PCT/US2004/039618 2003-11-24 2004-11-24 Semi-static parity distribution technique WO2005052784A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP2006541726A JP2007516524A (en) 2003-11-24 2004-11-24 Quasi-static distributed technology
AU2004294208A AU2004294208B2 (en) 2003-11-24 2004-11-24 Semi-static distribution technique
KR1020067010172A KR101148697B1 (en) 2003-11-24 2004-11-24 Semi-static distribution technique
CA2546242A CA2546242C (en) 2003-11-24 2004-11-24 Semi-static distribution technique
EP04812189A EP1687707B1 (en) 2003-11-24 2004-11-24 Semi-static parity distribution technique
CN200480034712XA CN101023412B (en) 2003-11-24 2004-11-24 Semi-static parity distribution technique
IL175829A IL175829A (en) 2003-11-24 2006-05-22 Semi-static distribution technique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/720,364 2003-11-24
US10/720,364 US7185144B2 (en) 2003-11-24 2003-11-24 Semi-static distribution technique

Publications (2)

Publication Number Publication Date
WO2005052784A2 WO2005052784A2 (en) 2005-06-09
WO2005052784A3 true WO2005052784A3 (en) 2007-02-08

Family

ID=34591531

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/039618 WO2005052784A2 (en) 2003-11-24 2004-11-24 Semi-static parity distribution technique

Country Status (9)

Country Link
US (2) US7185144B2 (en)
EP (1) EP1687707B1 (en)
JP (1) JP2007516524A (en)
KR (1) KR101148697B1 (en)
CN (1) CN101023412B (en)
AU (1) AU2004294208B2 (en)
CA (1) CA2546242C (en)
IL (1) IL175829A (en)
WO (1) WO2005052784A2 (en)

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