CA2497326A1 - Moving data among storage units - Google Patents

Moving data among storage units Download PDF

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Publication number
CA2497326A1
CA2497326A1 CA 2497326 CA2497326A CA2497326A1 CA 2497326 A1 CA2497326 A1 CA 2497326A1 CA 2497326 CA2497326 CA 2497326 CA 2497326 A CA2497326 A CA 2497326A CA 2497326 A1 CA2497326 A1 CA 2497326A1
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Canada
Prior art keywords
storage
storage pool
pool
target
source
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA 2497326
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French (fr)
Other versions
CA2497326C (en
Inventor
Kevin Lee Gibble
Gregory Tad Kishi
Jonathan Wayne Peake
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International Business Machines Corp
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Individual
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Publication of CA2497326A1 publication Critical patent/CA2497326A1/en
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Publication of CA2497326C publication Critical patent/CA2497326C/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
    • G06F3/0646—Horizontal data movement in storage systems, i.e. moving data in between storage devices or systems
    • G06F3/0647—Migration mechanisms
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
    • G06F3/0608—Saving storage space on storage systems
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
    • G06F3/0671—In-line storage system
    • G06F3/0683—Plurality of storage devices
    • G06F3/0686—Libraries, e.g. tape libraries, jukebox
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/026—Control of operating function, e.g. switching from recording to reproducing by using processor, e.g. microcomputer

Abstract

Storage pool information indicates an assignment of a plurality of storage units to a plurality of storage pools, wherein each pool is assigned zero or more storage units, wherein data associated with one storage pool is stored in a storage unit assigned to the storage pool, wherein the storage pool information for each pool indicates a threshold and target storage pool, and wherein the target storage pool is capable of being different from the storage pool. One storage unit associated with a source storage pool is selected and a determination is made of the threshold from the storage pool information for the source storage pool. A determination is made of whether the selected storage unit satisfies the determined threshold and if the selected storage unit satisfies the determined threshold, then a target storage unit in the target storage pool is selected if the storage pool information for the source storage pool indicates a target storage pool different from the source storage pool. Data from the selected storage unit is copied to the selected target storage unit.

Claims (23)

1. A method for managing data in storage units (6a, 6b), comprising:
maintaining storage pool information (90) indicating an assignment of a plurality of storage units to a plurality of storage pools, wherein each pool is assigned zero or more storage units, wherein data associated with one storage pool is stored in a storage unit assigned to the storage pool, wherein the storage pool information for each pool indicates a threshold (100) and target storage pool (102), and wherein the target storage pool is capable of being different from the storage pool, and wherein at least two of the storage pools have different thresholds;
selecting one storage unit associated with a source storage pool;
determining the threshold from the storage pool information for the source storage pool;
determining whether the selected storage unit satisfies the determined threshold;
if the selected storage unit satisfies the determined threshold, then selecting a target storage unit in the target storage pool if the storage pool information for the source storage pool indicates a target storage pool different from the source storage pool; and copying data from the selected storage unit to the selected target storage unit.
2. The method of claim 1, wherein the selected storage unit satisfies the determined threshold if an amount of active data in the selected storage unit is less than the threshold.
3. The method of claim 1, further comprising:
selecting the target storage unit from the source storage pool if a different target storage pool is not indicated in the storage pool information for the source storage pool.
4. The method of claim 1, wherein the threshold for the source storage pool is lower than the threshold for the target storage pool.
5. The method of claim 1, wherein the storage units in the source storage pool have a lower storage capacity than the storage units in the target storage pool.
6. The method of claim 1, wherein the source storage pool comprises a first storage pool, wherein the target storage pool comprises a second storage pool, wherein a third storage pool is identified as a target storage pool in the storage pool information for the second storage pool, and whereby data from one selected storage unit in the second storage pool is moved to the third storage pool when the threshold for the second storage pool is reached.
7. The method of claim 1, wherein the source storage pool stores data transferred from a storage device.
8. The method of claim 7, wherein the storage device has a higher data access rate than the storage units.
9. The method of claim 7, wherein the storage units comprise tape cartridges, and wherein the storage device operates as a tape buffer to which data is written using tape Input/Output commands.
10. The method of claim 7, wherein the storage units comprise tape cartridges in a virtual tape server and wherein the storage device comprises a virtual tape buffer in said virtual tape server.
11. The method of claim 1, wherein the storage units comprise sequential access tape cartridges.
12. A system for managing data, comprising:
storage units (6a, 6b);
means for maintaining storage pool information (90) indicating an assignment of a plurality of storage units to a plurality of storage pools (8a, 8b), wherein each pool is assigned zero or more storage units, wherein data associated with one storage pool is stored in a storage unit assigned to the storage pool, wherein the storage pool information for each pool indicates a threshold (100) and target storage pool (102), and wherein the target storage pool is capable of being different from the storage pool, and wherein at least two of the storage pools have different thresholds;
means for selecting one storage unit associated with a source storage pool;
means for determining the threshold from the storage pool information for the source storage pool;
means for determining whether the selected storage unit satisfies the determined threshold;
means for selecting, if the selected storage unit satisfies the determined threshold, a target storage unit in the target storage pool if the storage pool information for the source storage pool indicates a target storage pool different from the source storage pool; and means for copying data from the selected storage unit to the selected target storage unit.
13. The system of claim 12, wherein the selected storage unit satisfies the determined threshold if an amount of active data in the selected storage unit is less than the threshold.
14. The system of claim 12, further comprising:
selecting the target storage unit from the source storage pool if a different target storage pool is not indicated in the storage pool information for the source storage pool.
15. The system of claim 12, wherein the threshold for the source storage pool is lower than the threshold for the target storage pool.
16. The system of claim 12, wherein the storage units in the source storage pool have a lower storage capacity than the storage units in the target storage pool.
17. The system of claim 12, wherein the source storage pool comprises a first storage pool, wherein the target storage pool comprises a second storage pool, wherein a third storage pool is identified as a target storage pool in the storage pool information for the second storage pool, and whereby data from one selected storage unit in the second storage pool is moved to the third storage pool when the threshold for the second storage pool is reached.
18. The system of claim 12, wherein the source storage pool stores data transferred from a storage device.
19. The system of claim 18, wherein the storage device has a higher data access rate than the storage units.
20. The system of claim 19, wherein the storage units comprise tape cartridges, and wherein the storage device operates as a tape buffer to which data is written using tape Input/Output commands.
21. The system of claim 18, wherein the storage units comprise tape cartridges in a virtual tape server and wherein the storage device comprises a virtual tape buffer in said virtual tape server.
22. The system of claim 12, wherein the storage units comprise sequential access tape cartridges.
23. A computer program product for, when executed on a computer system, instructing the computer system to carry out the method of any preceding method claim.
CA 2497326 2002-08-29 2003-08-13 Moving data among storage units Expired - Lifetime CA2497326C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/231,815 2002-08-29
US10/231,815 US7103731B2 (en) 2002-08-29 2002-08-29 Method, system, and program for moving data among storage units
PCT/GB2003/003551 WO2004021190A2 (en) 2002-08-29 2003-08-13 Moving data among storage units

Publications (2)

Publication Number Publication Date
CA2497326A1 true CA2497326A1 (en) 2004-03-11
CA2497326C CA2497326C (en) 2011-10-11

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Family Applications (1)

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CA 2497326 Expired - Lifetime CA2497326C (en) 2002-08-29 2003-08-13 Moving data among storage units

Country Status (10)

Country Link
US (2) US7103731B2 (en)
EP (1) EP1540455B1 (en)
JP (1) JP4502807B2 (en)
KR (1) KR100633982B1 (en)
CN (1) CN1295591C (en)
AT (1) ATE362132T1 (en)
AU (1) AU2003251066A1 (en)
CA (1) CA2497326C (en)
DE (1) DE60313783T2 (en)
WO (1) WO2004021190A2 (en)

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