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Apparatus and method for resource reclamation in data storage systems

A storage system and resource recovery technology, applied in the field of managing resource recovery in data storage systems")

Active Publication Date: 2009-09-23
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In large systems with many administrators and no single point of control, such manual intervention is also unacceptable

Method used

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  • Apparatus and method for resource reclamation in data storage systems
  • Apparatus and method for resource reclamation in data storage systems
  • Apparatus and method for resource reclamation in data storage systems

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Embodiment Construction

[0033] The preferred embodiment of the present invention is implemented in a data storage system in which newly allocated volumes can be created. Newly allocated volumes are volumes that do not have underlying real storage areas associated with them when they are created. The system then provides the real storage area when needed, ie when a write to the newly allocated volume occurs. However, it will be clear to one of ordinary skill in the art that the inventive concept illustrated by the preferred exemplary embodiment can also be applied in other data storage systems, for example where just-in-time or on-demand provisioning of data storage can be expected Any data storage system.

[0034] During the process of data processing, volumes already in use may become redundant so that they can be returned to the reclamation pool, prepared or manually selected for reuse, or put back into use if necessary . The latter can occur, for example, if the action to make the volume redund...

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Abstract

An apparatus for managing resource reclamation in data storage systems comprises: a volume deletion metadata recorder for recording metadata for one or more deleted volumes; a policy engine responsive to a predetermined policy rule to apply the policy rule to the metadata; and the policy engine initiating policy-controlled data storage space reclamation for the one or more deleted volumes. A volume reclaimer is responsive to the policy engine for reclaiming a data storage space from the one or more deleted volumes; and a resource allocator allocates the data storage space.

Description

technical field [0001] The present invention relates to techniques for managing device controllers, and more particularly, techniques for managing reclamation (or "scavenging") in data storage systems. Background technique [0002] Many file systems and storage subsystems provide tools for recovering deleted files. A simple example of this is The operating system's Recycle Bin, where if users accidentally delete files, they can go to the Recycle Bin, list the deleted files, and select the ones they want to restore (Microsoft and Windows are US and elsewhere trademarks or registered trademarks of Microsoft Corporation). Subsequently, the file is made available to the user again. In this situation, the Recycle Bin will gradually fill up and the free space on the system will eventually be exhausted. Today, Windows monitors free space and in some cases provides a prompt to the administrator along with the line "You're running out of space - do you want to empty the Recycle ...

Claims

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Application Information

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IPC IPC(8): G06F17/30G06F3/06
CPCG06F3/0644G06F17/30082G06F3/0652G06F3/0662G06F3/0608G06F3/0683G06F16/122G06F9/50G06F3/06
Inventor 约翰·P·阿戈姆巴克里斯托弗·B·比肯卡洛斯·F·富恩特西蒙·沃尔什
Owner HUAWEI TECH CO LTD
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