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    • 7. 发明授权
    • Application of log records to data compressed with different encoding
scheme
    • 将日志记录应用于使用不同编码方案压缩的数据
    • US5897641A
    • 1999-04-27
    • US854937
    • 1997-05-13
    • James Alan RuddyKalpana ShyamGary H. SockutJulie Ann Watts
    • James Alan RuddyKalpana ShyamGary H. SockutJulie Ann Watts
    • G06F17/30
    • G06F17/30368Y10S707/99942Y10S707/99953
    • A primary database's log records are used to update a second database that has a different encoding scheme than the log record and the primary database. This encoding scheme, for example, may involve compression, encryption, or another data transformation. First, a stale encoded data record from the second database is identified. This data record is one whose counterpart in the primary database has been updated in the primary database and where update has been logged. The stale data record is modified to reflect its contents as encoded by the first encoding scheme rather than the second. Then, the logged change is applied to update the modified record. The updated record is then decoded and subsequently re-encoded according to the second encoding scheme. This record is then stored in the second database replacing the stale second data record.
    • 主数据库的日志记录用于更新具有与日志记录和主数据库不同的编码方案的第二个数据库。 该编码方案例如可以涉及压缩,加密或另一数据转换。 首先,识别来自第二数据库的陈旧的编码数据记录。 该数据记录是主数据库中对应的数据库已在主数据库中更新,并记录更新的数据。 陈旧的数据记录被修改以反映其由第一编码方案而不是第二编码方案编码的内容。 然后,应用记录的更改来更新修改的记录。 然后对更新的记录进行解码,然后根据第二编码方案重新编码。 然后将该记录存储在第二数据库中,代替陈旧的第二数据记录。