db2手工创建表空间
db2 v10.1
1.1 创建系统管理使用文件目录的表空间
db2 "create tablespace newtbs01 managed by system using ('/home/db2inst3/test/newtb/newtbs01')"
1.2 创建数据库管理的使用文件的表空间
db2 "create tablespace newtbs02 managed by database using (file '/home/db2inst3/test/newtb/newtbs02.file' 1000)"
7.9M newtbs02.file
1.3 创建数据库管理的使用多文件的表空间
db2 "create tablespace newtbs03
managed by database using (
file '/home/db2inst3/test/newtb/newtbs031.file' 4000,
file '/home/db2inst3/test/newtb/newtbs032.file' 2000)"
32M newtbs031.file
16M newtbs032.file
创建系统管理的pagesize是16k的表空间
[db2inst3@kvm101 newtb]$ db2 "create tablespace newtbs04 pagesize 16 k managed by system using ('/home/db2inst3/test/newtb/newtbs04')"
DB21034E The command was processed as an SQL statement because it was not a
valid Command Line Processor command. During SQL processing it returned:
SQL1582N The PAGESIZE of the table space "NEWTBS04" does not match the
PAGESIZE of the bufferpool "IBMDEFAULTBP" associated with the table space.
SQLSTATE=428CB
发现报错，根据提示，新建的16k的表空间和默认使用的buffer IBMDEFAULTBP不匹配
创建的数据库是8k的pagesize，而这里我们要创建16k的表空空间
在db2中表空间需要对应pagesize的buffer pool
查看下当前bufferpool情况
[db2inst3@kvm101 newtb]$ db2 "select char(BPNAME,20),substr(NPAGES,1,10),substr(PAGESIZE,1,10) from syscat.bufferpools"
1 2 3
-------------------- ---------- ----------
IBMDEFAULTBP -2 8192
1 record(s) selected.
新建一个16k的bufferpool
[db2inst3@kvm101 newtb]$ db2 "create bufferpool bp_16k size 10000 pagesize 16K"
DB20000I The SQL command completed successfully.
[db2inst3@kvm101 newtb]$ db2 "select char(BPNAME,20),substr(NPAGES,1,10),
substr(PAGESIZE,1,10) from syscat.bufferpools"
1 2 3
-------------------- ---------- ----------
IBMDEFAULTBP -2 8192
BP_16K 10000 16384
2 record(s) selected.
创建了一个16k的buffer pool,再来使用这个16k的buffer pool创建一个16k的表空间
[db2inst3@kvm101 newtb]$ db2 "create tablespace newtbs04 pagesize 16 k managed by system using ('/home/db2inst3/test/newtb/newtbs04') bufferpool bp_16k"
DB20000I The SQL command completed successfully.
使用db2pd -d testdb -tablespace查看刚才新建的4个表空间：
使用UNIX中的设备创建表空间（就不做实验了）
看db2信息中心说明
Example : Creating DMS table spaces on AIX
The following SQL statement creates a DMS table space on an AIX system
using three logical volumes of 10 000 pages each, and specifies their I/O characteristics:
CREATE TABLESPACE RESOURCE
MANAGED BY DATABASE
USING (DEVICE '/dev/rdblv6' 10000,
DEVICE '/dev/rdblv7' 10000,
DEVICE '/dev/rdblv8' 10000)
OVERHEAD 7.5
TRANSFERRATE 0.06