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公开(公告)号：WO2009020978A2
公开(公告)日：2009-02-12
申请号：PCT/US2008/072248
申请日：2008-08-05
Applicant: MICROSOFT CORPORATION
Inventor： VANAMAMALAI, Thothathri , MEHRA, Karan , OLTEAN, Paul Adrian , DAS, Rajsekhar , KUSTERS, Norbert
CPC classification number: G06F11/2074 , G06F11/2041 , G06F11/2048 , G06F17/30088
Abstract: Aspects of the subject matter described herein relate to sharing volume data via shadow copies. In aspects, an active computer creates a shadow copy of a volume. The shadow copy is exposed to one or more passive computers that may read but not write to the volume. A passive computer may obtain data from the shadow copy by determining whether the data has been written to a differential area and, if so, reading it from the differential area. If the data has not been written to the differential area, the passive computer may obtain it by first reading it from the volume, then re-determining whether it has been written to the differential area, and if so, reading the data from the differential area. Otherwise, the data read from the volume corresponds to the data needed for the shadow copy.
Abstract translation: 这里描述的主题的各方面涉及经由影子副本共享卷数据。 在某些方面，活动计算机会创建卷的卷影副本。 影子副本会暴露给一个或多个可以读取但不写入卷的被动计算机。 被动计算机可以通过确定数据是否已经写入差分区域，并且如果是，从差分区域读取数据，可以从影子副本获得数据。 如果数据没有写入差分区域，被动计算机可以通过首先从卷中读取数据，然后重新确定它是否写入差分区域来获取数据，如果是，则从差分读取数据 区。 否则，从卷读取的数据对应于卷影副本所需的数据。
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公开(公告)号：WO2007030805A1
公开(公告)日：2007-03-15
申请号：PCT/US2006/035228
申请日：2006-09-08
Applicant: MICROSOFT CORPORATION
Inventor： GROFF, Dana D. , JOHNSON, James E. , CARGILLE, Jonathan M. , KUSTERS, Norbert , KALACH, Ran , VERMA, Surendra
CPC classification number: G06F11/1474 , G06F11/1471 , G06F2201/82
Abstract: Aspects of the subject matter described herein relate to transactions. In aspects, a consistency requestor such as a shadow copy service requests to have a consistent view of a set of resources. In response, transactions that are in a problematic state are allowed to exit the problematic state while new and existing transactions that are not in the problematic state are allowed to perform any work except work that takes them into the problematic state. After no transactions are in the problematic state, a consistent view of the set of resources is available. This view may be used by the consistency requestor as desired. Afterwards, the consistency requestor may indicate that a consistent view is no longer needed. Transactions are then allowed to enter the problematic state. Transactions may also be allowed to enter the problematic state if a timeout elapses.
Abstract translation: 本文描述的主题的方面涉及交易。 在一些方面，诸如卷影副本服务的一致性请求者请求具有一组资源的一致视图。 作为响应，处于有问题的状态的事务被允许退出有问题的状态，而不存在问题状态的新的和现有的事务被允许执行任何工作，除了使它们进入有问题的状态的工作。 在没有交易处于问题状态之后，可以使用一组资源的一致视图。 该视图可以由一致性请求者根据需要使用。 之后，一致性请求者可能表示不再需要一致的视图。 然后允许交易进入有问题的状态。 如果超时，也可允许交易进入问题状态。
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公开(公告)号：EP2186013A2
公开(公告)日：2010-05-19
申请号：EP08797218.8
申请日：2008-08-05
Applicant: Microsoft Corporation
Inventor： VANAMAMALAI, Thothathri , MEHRA, Karan , OLTEAN, Paul Adrian , DAS, Rajsekhar , KUSTERS, Norbert
CPC classification number: G06F11/2074 , G06F11/2041 , G06F11/2048 , G06F17/30088
Abstract: Aspects of the subject matter described herein relate to sharing volume data via shadow copies. In aspects, an active computer creates a shadow copy of a volume. The shadow copy is exposed to one or more passive computers that may read but not write to the volume. A passive computer may obtain data from the shadow copy by determining whether the data has been written to a differential area and, if so, reading it from the differential area. If the data has not been written to the differential area, the passive computer may obtain it by first reading it from the volume, then re-determining whether it has been written to the differential area, and if so, reading the data from the differential area. Otherwise, the data read from the volume corresponds to the data needed for the shadow copy.
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