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公开(公告)号:US08200922B2
公开(公告)日:2012-06-12
申请号:US12316902
申请日:2008-12-17
申请人: Brian McKean , Mohamad El-Batal , Bret S. Weber , John Dietterich , Jeffrey S Werning , Timothy E. Hoglund
发明人: Brian McKean , Mohamad El-Batal , Bret S. Weber , John Dietterich , Jeffrey S Werning , Timothy E. Hoglund
IPC分类号: G06F12/00
CPC分类号: G06F11/1466 , G06F12/0246 , G06F2212/7201
摘要: A method and apparatus for taking a snapshot of a storage system employing a solid state disk (SSD). A plurality of mapping tables in the SSD store data needed to create a one or more point in time snapshots and a current view of the SSD. In response to a write command, the SSD executes its normal write process and updates its mapping tables to indicate the current view of the SSD and additionally retains the original data in a table of pointers to the original data, as the snapshot of an earlier state of the SSD. In the preferred embodiment, the innate ability of SSDs to write data to a new location is used to perform a point-in-time copy with little or no loss in performance in performing the snapshot.
摘要翻译: 一种用于拍摄采用固态盘(SSD)的存储系统的快照的方法和装置。 SSD中的多个映射表存储创建一个或多个时间点快照和SSD的当前视图所需的数据。 响应于写入命令,SSD执行其正常写入处理并更新其映射表以指示SSD的当前视图,并且将原始数据另外保留在指向原始数据的指针表中,作为较早状态的快照 的SSD。 在优选实施例中,SSD用于将数据写入新位置的固有能力用于执行时间点复制,而在执行快照时性能很少或没有损失。
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公开(公告)号:US20100153620A1
公开(公告)日:2010-06-17
申请号:US12316902
申请日:2008-12-17
申请人: Brian McKean , Mohamad El-Batal , Bret S. Weber , John Dietterich , Jeffrey S. Werning , Timothy E. Hoglund
发明人: Brian McKean , Mohamad El-Batal , Bret S. Weber , John Dietterich , Jeffrey S. Werning , Timothy E. Hoglund
CPC分类号: G06F11/1466 , G06F12/0246 , G06F2212/7201
摘要: A method and apparatus for taking a snapshot of a storage system employing a solid state disk (SSD). A plurality of mapping tables in the SSD store data needed to create a one or more point in time snapshots and a current view of the SSD. In response to a write command, the SSD executes its normal write process and updates its mapping tables to indicate the current view of the SSD and additionally retains the original data in a table of pointers to the original data, as the snapshot of an earlier state of the SSD. In the preferred embodiment, the innate ability of SSDs to write data to a new location is used to perform a point-in-time copy with little or no loss in performance in performing the snapshot.
摘要翻译: 一种用于拍摄采用固态盘(SSD)的存储系统的快照的方法和装置。 SSD中的多个映射表存储创建一个或多个时间点快照和SSD的当前视图所需的数据。 响应于写入命令,SSD执行其正常写入处理并更新其映射表以指示SSD的当前视图,并且将原始数据另外保留在指向原始数据的指针表中,作为较早状态的快照 的SSD。 在优选实施例中,SSD用于将数据写入新位置的固有能力用于执行时间点复制,而在执行快照时性能很少或没有损失。
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