发明授权
US06920447B2 Concurrent data recall in a hierarchical storage environment using plural queues
失效
在使用多个队列的分层存储环境中并发数据调用
- 专利标题: Concurrent data recall in a hierarchical storage environment using plural queues
- 专利标题(中): 在使用多个队列的分层存储环境中并发数据调用
-
申请号: US09783820申请日: 2001-02-15
-
公开(公告)号: US06920447B2公开(公告)日: 2005-07-19
- 发明人: Ravisankar Pudipeddi , Ran Kalach
- 申请人: Ravisankar Pudipeddi , Ran Kalach
- 申请人地址: US WA Redmond
- 专利权人: Microsoft Corporation
- 当前专利权人: Microsoft Corporation
- 当前专利权人地址: US WA Redmond
- 代理机构: Woodcock Washburn LLP
- 主分类号: G06F17/30
- IPC分类号: G06F17/30
摘要:
A technique for recalling data objects stored on media. A queue is created for each medium on which data objects are located, where each request to recall a data object is placed on the queue corresponding to the medium on which the data object is located. A queue is “active” when its corresponding medium is mounted and being used for recall; otherwise the queue is “non-active.” A thread is created for each active queue, where the thread retrieves from a medium the requested items on the active queue. When plural drives are available for mounting and reading media, plural queues may be active concurrently, so that the plural queues' respective threads may recall items from the plural media in parallel. Preferably, the requests on each queue are organized in an order such that the offset locations of the requested items form two monotonically increasing sequences.