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DB2手工创建数据库,很简单的。 创建例子数据库: 1. 生成数据库存放目录,和归档目录 mkdir -p /demo/sample mkdir -p

DB2手工创建数据库,很简单的。

创建例子数据库:
  1. 生成数据库存放目录,和归档目录
      mkdir -p /demo/sample
      mkdir -p /demo/samplearc
 2. 生成sample数据库
    db2sampl -dbpath /demo/sample
 3. 指定数据库归档目录
    -- DISK: 指磁盘  TSM:指IBM TSM  VENDOR: 指第三方存储设备
      db2 update db cfg for SAMPLE  using LOGARCHMETH1 DISK:/demo/samplearc


其它数据库创建:

1. 查找数据库默认创建路径
  # ./db2 get dbm cfg|grep "DFTDBPATH"
 Default database path (DFTDBPATH) = /home/db2inst1
当然也可在创建时手工指定
  //create database mydb on d:\data


2. 创建数据库
  简单例子:
    create database xcldb using codeset gbk territory cn;


  代码页和整理次序参数:
  所有db2字符类型(char varchar clob dbclob)都有一个相关联的字符代码页
  即对照表,将这些数据转为数据库中存储的二进制数据库.
    中文代码页为1386 codeset为GBK, Territory为CN
  产生文件:
  会创建3个默认表空间,日志,配置信息,历史文件
    SYSCATSPACE 数据字典
    TEMPSPACE1 临时表空间
    USERSPACE1 存储所有用户对象(表,索引)的地方.
  dbv9之前默认为sms表空间,之后,除临时表空间外其它默认为dms表空间


复杂些的例子:
  create database xcldb
  DFT_EXTENT_SZ 4
  CATALOG TABLESPACE MANAGED BY DATABASE USING
  (FILE 'C:\DATA\CATALOG.DAT' 2000,FILE 'D:\DATA\CATALOG.DAT' 2000)
  EXTENTSIZE 8
  PREFETCHSIZE 16
  TEMPORARY TABLESPACE MANAGED BY SYSTEM USING
  ('C:\TEMPTS','D:\TEMPTS')
  USER TABLESPACE MANAGED BY DATABASE USING
  (FILE 'C:\XCLDB\USERTS.DATA' 1200)
  EXTENTSIZE 24
  PREFETCHSIZE 48
 
  --DFT_EXTENT_SZ 4 默认扩展数据块大小是4个页面
  --CATALOG TABLESPACE MANAGED BY DATABASE USING 编目空间将由数据库管理 
  --('C:\TEMPTS','D:\TEMPTS') 临时表空间将跨两个文件.
  --(FILE 'C:\TS\USERTS.DATA' 1200)   这个空间只有一个容器.由1200个页面组成
  --EXTENTSIZE 24 user表空间的EXTENTSIZE是24个页面
  --PREFETCHSIZE 48 查询时,预读取48个页面


 

推荐阅读:

DB2数据库性能调整和优化(第1、2版) PDF

DB2数据库性能优化介绍

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