公开(公告)号：US20080177961A1

公开(公告)日：2008-07-24

申请号：US11626223

申请日：2007-01-23

申请人： Jeffrey A. McSharry ,  David C. Reed ,  Max D. Smith

发明人： Jeffrey A. McSharry ,  David C. Reed ,  Max D. Smith

IPC分类号： G06F12/00

CPC分类号： G06F11/1451

摘要： A backup operation is performed on a source data set. The data set is segmented into a plurality of blocks. An update bit indicator is implemented for each of the plurality of blocks. The update bit indicator is appended to a field of an existing data index or tied to a mapping table having a relative byte address (RBA). The update bit indicator is set for each of the plurality of blocks which are newly created or changed from a first backup to a second backup, which generates a dump data set containing compressed blocks from the source data set. A backup operation is executed to backup each of the plurality of blocks having the update bit indicator set. The data index or mapping table is updated to show which of the plurality of blocks have changed from the first backup to the second backup.

摘要翻译： 对源数据集进行备份操作。 数据集被分割为多个块。 为多个块中的每个块实现更新位指示符。 更新位指示符附加到现有数据索引的字段，或者被绑定到具有相对字节地址（RBA）的映射表。 针对从第一备份到第二备份新创建或更改的多个块中的每个块设置更新位指示符，其从源数据集生成包含压缩块的转储数据集。 执行备份操作以备份具有更新位指示符集的多个块中的每一个。 更新数据索引或映射表以显示多个块中的哪个块已经从第一备份变为第二备份。