摘要:
一. 官网说明 owid的定义:A globally unique address for a row in a database. rowid 分为extended rowid 和 restricted rowied.1.1 Restricted ROWID Internally, the ROWID is a structure that holds information that the database server needs to access a row. The restricted internal ROWID is 6 bytes on most platforms. E 阅读全文
摘要:
一. DBV 说明 DBV是一个常用的工具,OracleMOS上有一篇文章介绍DBV:[ID 35512.1]。 dbverify工具的主要目的是为了检查数据文件的物理结构,包括数据文件是否损坏,是否存在逻辑坏块,以及数据文件中包含何种类型的数据。DBV checks Oracledatafiles to ensure that:(1)The datafile has a valid header (2)Each datablock in the file has aspecial "wrapper" which identifies the block - this&qu 阅读全文