TW200723102A - Snapshot management method for a logical diskette manager - Google Patents
Snapshot management method for a logical diskette managerInfo
- 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
Links
Landscapes
- 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.
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)
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 |
-
2005
- 2005-12-02 TW TW094142685A patent/TW200723102A/en not_active IP Right Cessation
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 |