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System and method 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: 2012-09-12
IBM 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 reduces usable storage capacity considerably - 70% in theory, usually 50% in practice

Method used

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  • System and method for optimized reclamation processing in a virtual tape library system
  • System and method for optimized reclamation processing in a virtual tape library system
  • System and method for optimized reclamation processing in a virtual tape library system

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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

The present invention relates to the field of storage management of sequential media and more particular it relates to autonomous reclamation processing of virtualized sequential media such as virtual tapes in a virtual tape library. In order to provide an improved method and system for managing virtual tapes in a virtual tape library system, the inventional system comprises a storage management application managing virtual tapes in a virtual tape library system (VTL-system) which is capable to identify all block addresses of active data for a given source virtual tape; said storage management application is connected via a network to said virtual tape library system and is capable to send a command instructing said VTL-system to perform autonomous reclamation. The VTL-system is characterized by an inventional reclamation logic which uniquely maps each host block written by the storage management application to a block on the disk system of said VTL-system. In conjunction with the storage management application it performs a method to perform autonomous reclamation.

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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IPC IPC(8): G06F3/06
CPCG06F3/0664G06F3/061G06F3/0629G06F3/067G06F3/0686G06F3/0689
Inventor N·豪斯汀S·内夫
Owner IBM CORP
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