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    • 5. 发明授权
    • Continuous data reduction for highly available synchronous mirrors
    • 高可用同步镜的连续数据缩减
    • US08352435B1
    • 2013-01-08
    • US13050905
    • 2011-03-17
    • Richard P. RuefUday K. GuptaChris D. Youngworth
    • Richard P. RuefUday K. GuptaChris D. Youngworth
    • G06F7/00
    • G06F11/2076G06F11/2066
    • In a synchronous remote mirroring system, as a host computer writes data to primary storage in a primary data storage system, remote copy data is transferred from the primary data storage system to a secondary storage system in which secondary storage is maintained as a remote mirror of the primary storage. The primary data storage system performs data reduction upon the remote copy data prior to transmitting the remote copy data in a reduced to the secondary data storage system. The secondary data storage system returns an acknowledgement of receipt of the remote copy data upon receipt of the remote copy data in the reduced form, and later reverses the data reduction upon the remote copy data in the reduced form to produce data written to the secondary storage to maintain the secondary storage as the remote mirror of the primary storage.
    • 在同步远程镜像系统中,作为主计算机,将数据写入主数据存储系统中的主存储器,远程复制数据从主数据存储系统传输到辅助存储系统,辅助存储系统中维护辅助存储器作为远程镜像 主要存储。 主数据存储系统在将副本数据存储系统中的远程复制数据发送到副数据存储系统之前,在远程拷贝数据上执行数据缩减。 次级数据存储系统在收到缩减形式的远程复制数据后,返回收到远程复制数据的确认,然后在缩小形式的远端复制数据之后反转数据减少,以产生写入辅助存储器的数据 将辅助存储作为主存储的远程镜像进行维护。