Method for fault tolerant modification of data representation in a large database
    2.
    发明授权
    Method for fault tolerant modification of data representation in a large database 失效
    大型数据库中数据表示的容错修改方法

    公开(公告)号:US06792429B2

    公开(公告)日:2004-09-14

    申请号:US10027407

    申请日:2001-12-19

    IPC分类号: G06F1700

    摘要: A system and method for restructuring the physical storage of a table of a database. The records of the table are grouped into one or more partitions, each of which is stored in a file having a number of fixed sized blocks. Each of the blocks has a first format. Restructuring the physical storage of the table involves changing, to a second format, the format of the blocks of the file in which a partition of the table is stored. Additionally, control data that includes a catalog table and one or more file labels describing the partitions in which the records of the table are grouped, is altered to indicate that the blocks of a partition are enabled to be stored in the second format. Restructuring occurs in phases so as to minimize the inaccessibility of the table being restructured to updates.

    摘要翻译: 一种用于重组数据库表的物理存储的系统和方法。 表的记录被分组成一个或多个分区,每个分区存储在具有多个固定大小的块的文件中。 每个块具有第一格式。 重新构建表的物理存储涉及将存储表的分区的文件的块的格式更改为第二格式。 此外,改变包括目录表和描述表的记录被分组的分区的一个或多个文件标签的控制数据,以指示分区的块被使能以第二格式存储。 重组分阶段发生,以便最小化正在重新更新的表的不可访问性。