Information about the column definitions, index, and statistics for a nickname is stored in the DB2 federated database system catalogs.

关于列定义、索引以及昵称统计信息的信息存储在DB 2联邦数据库系统编目中。

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Since a DB2 buffer pool is a part of the main memory of the system, the DB2 database manager allocates it for caching tables and index data when it reads or writes to and from media disks.

因为db2缓冲池是系统主内存的一部分，DB 2数据库管理器在它读取或写入磁盘介质时将它分配给缓存表和索引数据。

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Those details are not discussed here; instead this article describes the general idea and its adaptation to integrate a hash index into a database system using the DB2 index extension mechanism.

本文并不讨论这些细节，而是描述一般的思想，以及使用DB 2索引扩展机制将hash索引集成到数据库系统中。

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The paper estimates that each new profile added to the US DNA database - the Combined DNA Index System, or Codis - resulted in 0.57 fewer serious offences.

BBC: DNA and individual freedom v crime prevention