TW200723102A - Snapshot management method for a logical diskette manager - Google Patents

Snapshot management method for a logical diskette manager

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Publication number
TW200723102A
TW200723102A TW094142685A TW94142685A TW200723102A TW 200723102 A TW200723102 A TW 200723102A TW 094142685 A TW094142685 A TW 094142685A TW 94142685 A TW94142685 A TW 94142685A TW 200723102 A TW200723102 A TW 200723102A
Authority
TW
Taiwan
Prior art keywords
snapshots
diskette
logical
time
data address
Prior art date
Application number
TW094142685A
Other languages
Chinese (zh)
Other versions
TWI296776B (en
Inventor
Yuen-Hong Chen
Tom Chen
Win-Harn Liu
Original Assignee
Inventec 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
Application filed by Inventec Corp filed Critical Inventec Corp
Priority to TW094142685A priority Critical patent/TW200723102A/en
Publication of TW200723102A publication Critical patent/TW200723102A/en
Application granted granted Critical
Publication of TWI296776B publication Critical patent/TWI296776B/zh

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  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)

Abstract

Disclosed is a snapshot management method for a logical diskette manager, including the steps of: upon receiving a write request, locating the data address in the logical diskette to which data is to be written using the plural snapshots created in the logical diskette at different points of time, and backing up the data in the data address in the logical diskette to which the data is about to be written based on the snapshots created at the very preceding point of time prior to the copying operation; upon receiving a read request, determining whether the requested data address exist in the snapshots corresponding to the read request; if the requested data address does not exist and the point of time corresponding to the snapshots is not the latest point of time, searching backwards for plural snapshots corresponding to a later point of time, and reading the snapshots in the requested data address. This invention can realize the function of quickly backing up the snapshots and reducing the space required for storing the snapshots.
TW094142685A 2005-12-02 2005-12-02 Snapshot management method for a logical diskette manager TW200723102A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW094142685A TW200723102A (en) 2005-12-02 2005-12-02 Snapshot management method for a logical diskette manager

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW094142685A TW200723102A (en) 2005-12-02 2005-12-02 Snapshot management method for a logical diskette manager

Publications (2)

Publication Number Publication Date
TW200723102A true TW200723102A (en) 2007-06-16
TWI296776B TWI296776B (en) 2008-05-11

Family

ID=45068874

Family Applications (1)

Application Number Title Priority Date Filing Date
TW094142685A TW200723102A (en) 2005-12-02 2005-12-02 Snapshot management method for a logical diskette manager

Country Status (1)

Country Link
TW (1) TW200723102A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8171246B2 (en) * 2008-05-31 2012-05-01 Lsi Corporation Ranking and prioritizing point in time snapshots

Also Published As

Publication number Publication date
TWI296776B (en) 2008-05-11

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees