WO2002050684A3 - Object-based storage device with improved reliability and fast crash recovery - Google Patents

Object-based storage device with improved reliability and fast crash recovery Download PDF

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Publication number
WO2002050684A3
WO2002050684A3 PCT/US2001/048511 US0148511W WO0250684A3 WO 2002050684 A3 WO2002050684 A3 WO 2002050684A3 US 0148511 W US0148511 W US 0148511W WO 0250684 A3 WO0250684 A3 WO 0250684A3
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WO
WIPO (PCT)
Prior art keywords
file
inode
atomically
copy
storage
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Application number
PCT/US2001/048511
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French (fr)
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WO2002050684A2 (en
Inventor
John H Howard
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Sun Microsystems Inc
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.)
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Publication date
Application filed by Sun Microsystems Inc filed Critical Sun Microsystems Inc
Priority to AU2002230883A priority Critical patent/AU2002230883A1/en
Publication of WO2002050684A2 publication Critical patent/WO2002050684A2/en
Publication of WO2002050684A3 publication Critical patent/WO2002050684A3/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/10—File systems; File servers
    • G06F16/18—File system types
    • G06F16/1865—Transactional file systems

Abstract

An object-based storage may employ a transactional interface and a copy on write protocol. The inode for the file (which is identified by the I-number and indicates one or more blocks storing the file data) may be copied to a working copy of the inode, and the working copy may be updated to indicate the newly allocated blocks. In response to a file commit (e.g. a file close or a file synchronization command), the working copy of the inode may be atomically written to a non-volatile storage. In this manner, the updates performed during the transaction may be atomically committed to the file. The inode itself may be stored in a file (referred to as the inode file), and the storage may perform updates to the inode file atomically as well. The inode file may be modified using the copy on write protocol described above, and the master inode (mapping the blocks of the inode file) may be atomically written to non-volatile storage to atomically update the inode file. In one particular embodiment, the storage employs a journal technique for updates to the inode file.
PCT/US2001/048511 2000-12-18 2001-12-13 Object-based storage device with improved reliability and fast crash recovery WO2002050684A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002230883A AU2002230883A1 (en) 2000-12-18 2001-12-13 Object-based storage device with improved reliability and fast crash recovery

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/739,618 US7730213B2 (en) 2000-12-18 2000-12-18 Object-based storage device with improved reliability and fast crash recovery
US09/739,618 2000-12-18

Publications (2)

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WO2002050684A2 WO2002050684A2 (en) 2002-06-27
WO2002050684A3 true WO2002050684A3 (en) 2004-03-25

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US (1) US7730213B2 (en)
AU (1) AU2002230883A1 (en)
WO (1) WO2002050684A2 (en)

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Also Published As

Publication number Publication date
US7730213B2 (en) 2010-06-01
WO2002050684A2 (en) 2002-06-27
US20020078244A1 (en) 2002-06-20
AU2002230883A1 (en) 2002-07-01

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