Systems and methods for optimized reclamation processing in a virtual tape library system

A virtual tape library and magnetic tape technology, applied in the input/output process of data processing, electrical digital data processing, instruments, etc., can solve the problem of storage capacity reduction and achieve the effect of effective storage capacity management and performance saving

Inactive Publication Date: 2015-09-16
INT BUSINESS MASCH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] 4. In case one output virtual tape becomes full, data collections or files that may belong together may be written to two different virtual tapes during reclamation
However, this results in a significant reduction in usable storage capacity - 70% in theory, typically 50% in practice

Method used

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  • Systems and methods for optimized reclamation processing in a virtual tape library system
  • Systems and methods for optimized reclamation processing in a virtual tape library system
  • Systems and methods for optimized reclamation processing in a virtual tape library system

Examples

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Embodiment Construction

[0054] With reference to the drawings in general and now in particular figure 2 , the inventive embodiment of the tape management system 300 includes a storage management application 204 running on the host computing system 202 . The storage management system manages the virtual tapes included in the virtual tape library (VTL) 310 . For each virtual tape on which data is written, the storage management system 204 maintains a mapping of an object such as a file (column 1) to a host block address (column 2) on that virtual tape (column 3) represented by VOLSER Table 208 - VOLSER uniquely identifies each virtual tape in the VTL - this is according to the prior art.

[0055] The storage management system 204 is connected to the virtual tape library system 310 via a network 220, which may be a Fiber Channel-based storage area network (SAN) or an Ethernet-based local area network (LAN), among others. The virtual tape library system 310 includes a computing system 212 running a vir...

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PUM

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Abstract

A storage management application determines that a source virtual tape requires reclamation, identifies all block addresses for active data of a source virtual tape and sorts the block addresses in an ascending order, identifies a target virtual tape which has sufficient free capacity to store the active data of said source virtual tape and the last written block address on said target virtual tape, and sends a command to the VTL-system instructing it to perform reclamation including information about said source and said target virtual tape, the sorted list of block addresses denoting active data on the source virtual tape and the starting block address on the target virtual tape. The reclamation logic references the active data host blocks of said source volume to said target virtual tape starting at said starting block address by just updating the host block to disk block mapping table.

Description

technical field [0001] The present invention relates to the field of storage management of time-series media, and more particularly, it relates to the autonomous reclamation process of virtualized time-series media such as virtual tapes in a virtual tape library. Background technique [0002] Storage management applications such as IBM Tivoli Storage Manager, Symantec Netbackup or EMC Legato Networker perform different data storage operations such as backup, archive and hierarchical storage management. Storage management applications use time-sequential media such as virtual tape primarily for cost-effective storage of data that is accessed more frequently than data on physical tape. [0003] Virtual tapes are typically emulated by a virtual tape library. A virtual tape library according to the prior art includes a computing system executing tape virtualization software. This tape virtualization software emulates virtual tape drives, virtual tape libraries and virtual tape...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/06
CPCG06F3/061G06F3/067G06F3/0686G06F3/0629G06F3/0689G06F3/0664
Inventor N·豪斯汀S·内夫
Owner INT BUSINESS MASCH CORP
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