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

IPC: G06F15/16 ,  G06F15/00

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。

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

IPC: G06F15/16 ,  G06F15/00

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.