发明授权
US07996636B1 Uniquely identifying block context signatures in a storage volume hierarchy
有权
独特地识别存储卷层次结构中的块上下文签名
- 专利标题: Uniquely identifying block context signatures in a storage volume hierarchy
- 专利标题(中): 独特地识别存储卷层次结构中的块上下文签名
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申请号: US11935704申请日: 2007-11-06
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公开(公告)号: US07996636B1公开(公告)日: 2011-08-09
- 发明人: Ashish Prakash , Robert M. English , Eric Hamilton
- 申请人: Ashish Prakash , Robert M. English , Eric Hamilton
- 申请人地址: US CA Sunnyvale
- 专利权人: NetApp, Inc.
- 当前专利权人: NetApp, Inc.
- 当前专利权人地址: US CA Sunnyvale
- 代理机构: Cesari and McKenna, LLP
- 主分类号: G06F13/00
- IPC分类号: G06F13/00
摘要:
A technique uniquely identifies block context signatures in a storage volume hierarchy of a storage system. In particular, the technique assigns unique volume identifiers (“IDs,” e.g., buffer tree or “bufftree” IDs) to volumes of the storage volume hierarchy, and allows clone volumes to determine that data blocks belong to an appropriate ancestor volume (e.g., and were written by the ancestor volume prior to creation of the clone). In this manner, the novel technique may uniquely identify and accurately determine whether an accessed data block is a correct data block (e.g., alleviating occurrences of data ID aliasing).