发明授权
US08140788B2 Apparatus, system, and method for selecting an input/output tape volume cache
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用于选择输入/输出磁带卷缓存的装置,系统和方法
- 专利标题: Apparatus, system, and method for selecting an input/output tape volume cache
- 专利标题(中): 用于选择输入/输出磁带卷缓存的装置,系统和方法
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申请号: US11763340申请日: 2007-06-14
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公开(公告)号: US08140788B2公开(公告)日: 2012-03-20
- 发明人: Thirumale N. Niranjan , Joseph M. Swingler
- 申请人: Thirumale N. Niranjan , Joseph M. Swingler
- 申请人地址: US NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: US NY Armonk
- 代理机构: Kunzler Needham Massey & Thorpe
- 主分类号: G06F12/00
- IPC分类号: G06F12/00
摘要:
An apparatus, system, and method are disclosed for selecting an input/output tape volume cache (TVC). A history module maintains access history instances for a plurality of clusters. A request module receives an access request for a logical volume. An adjustment module weights the access history instances in favor of recent access history instances. A calculation module calculates an affinity of the logical volume for each cluster of the plurality of clusters. The calculation module may calculate the affinity of the logical volume for each cluster of the plurality of clusters using read/write/scratch granularity and an algorithm. Further, the calculation module may filter out clusters. A selection module selects a cluster TVC with a highest affinity as the TVC for the logical volume.
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