Invention Grant
US08156306B1 Systems and methods for using thin provisioning to reclaim space identified by data reduction processes
有权
使用精简配置回收由数据简化过程标识的空间的系统和方法
- Patent Title: Systems and methods for using thin provisioning to reclaim space identified by data reduction processes
- Patent Title (中): 使用精简配置回收由数据简化过程标识的空间的系统和方法
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Application No.: US12642109Application Date: 2009-12-18
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Publication No.: US08156306B1Publication Date: 2012-04-10
- Inventor: Helen S. Raizen , Michael E. Bappe , Agarkov Vadim Nikolaevich , William Carl Biester , Richard Ruef , Karl M. Owen
- Applicant: Helen S. Raizen , Michael E. Bappe , Agarkov Vadim Nikolaevich , William Carl Biester , Richard Ruef , Karl M. Owen
- Applicant Address: US MA Hopkinton
- Assignee: EMC Corporation
- Current Assignee: EMC Corporation
- Current Assignee Address: US MA Hopkinton
- Agency: Daly, Crowley, Mofford & Durkee, LLP
- Main IPC: G06F12/08
- IPC: G06F12/08
Abstract:
The invention provides a system to reclaim space identified as no longer in use and comprises a vLUN, a thinly provisioned mapped LUN, a mapping layer, and a data reduction engine. Chunks of data are stored at logical chunk addresses (LCAs) in the vLUN and are mapped to corresponding physical chunk addresses (PCAs) in the thinly provisioned mapped LUN. The data reduction engine performs a data reduction process on a first logical chunk of data stored at a first LCA in the vLUN, where the first logical chunk has a size that is a nonzero integer multiple of the size of the storage extent of the thinly provisioned mapped LUN. After the data reduction process, the PCA associated with the first logical chunk is no longer needed, and the thinly provisioned mapped LUN is instructed to deallocate the PCA associated with the first logical chunk that is no longer needed.
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