db2数据库还原

db2 数据库 还原命令

 

1.备份的数据库(olddb) 与要还原的数据(newdb)名不相同: 

db2 restore db olddb into newdb; 

2.当前目录下存在多个备份文件.需要指定时间 

db2 restore db olddb taken at 20120819175932 into newdb; 

 

3.需要指定备份文件的目录 

db2 RESTORE DATABASE olddb FROM "/media/olddb.0.db2inst1.NODE0000.CATN0000.20120819175932.001" 

TAKEN AT 20120819175932  INTO newdb; 

 

4.需要指定newdb NEWLOGPATH路径 

db2 RESTORE DATABASE olddb FROM "/media/olddb.0.db2inst1.NODE0000.CATN0000.20120819175932.001" 

TAKEN AT 20120819175932 NEWLOGPATH "/opt/log" WITH 2 BUFFERS BUFFER 1024 INTO newdb; 

5.需要指定表空间的 

1).创建文件夹 

mkdir /home/db2inst1/db2space/newdb_sp0; 

mkdir /home/db2inst1/db2space/newdb_sp1; 

mkdir /home/db2inst1/db2space/newdb_sp2; 

mkdir /home/db2inst1/db2space/newdb_sp3; 

mkdir /home/db2inst1/db2space/newdb_sp4; 

mkdir /home/db2inst1/db2space/newdb_sp5; 

mkdir /home/db2inst1/db2space/newdb_sp6; 

 

2).还原命令加入 redirect without rolling forward 

db2 RESTORE DATABASE olddb FROM "/media/olddb.0.db2inst1.NODE0000.CATN0000.20120819175932.001" 

TAKEN AT 20120819175932 NEWLOGPATH "/opt/log" WITH 2 BUFFERS BUFFER 1024 INTO newdb 

redirect without rolling forward; 

 

3).设置表空间目录 

SET TABLESPACE CONTAINERS FOR 0 IGNORE ROLLFORWARD CONTAINER OPERATIONS USING (PATH "/home/db2inst1/db2space/newdb_sp0"); 

SET TABLESPACE CONTAINERS FOR 1 IGNORE ROLLFORWARD CONTAINER OPERATIONS USING (PATH "/home/db2inst1/db2space/newdb_sp1"); 

SET TABLESPACE CONTAINERS FOR 2 IGNORE ROLLFORWARD CONTAINER OPERATIONS USING (PATH "/home/db2inst1/db2space/newdb_sp2"); 

SET TABLESPACE CONTAINERS FOR 3 IGNORE ROLLFORWARD CONTAINER OPERATIONS USING (PATH "/home/db2inst1/db2space/newdb_sp3"); 

SET TABLESPACE CONTAINERS FOR 4 IGNORE ROLLFORWARD CONTAINER OPERATIONS USING (PATH "/home/db2inst1/db2space/newdb_sp4"); 

SET TABLESPACE CONTAINERS FOR 5 IGNORE ROLLFORWARD CONTAINER OPERATIONS USING (PATH "/home/db2inst1/db2space/newdb_sp5"); 

SET TABLESPACE CONTAINERS FOR 6 IGNORE ROLLFORWARD CONTAINER OPERATIONS USING (PATH "/home/db2inst1/db2space/newdb_sp6"); 

 

3).还原继续.注意为olddb 

RESTORE DATABASE olddb CONTINUE; 

 

6.数据库还原退回 

db2 restore db 注意为olddb abort 

 

7.还原后如果NEWLOGPATH 需要变更的 

db2 UPDATE DB CFG FOR newdb USING NEWLOGPATH /db2/db2inst1/db2logpath 

db2 UPDATE DB CFG FOR newdb  USING LOGFILSIZ 10001 

db2 force applications all; 

db2stop; 

db2start; 

前滚，向着时间增大的方向走，也就是，数据越来越新。 回滚，就是回退，是指对没提交的数据，做回退，恢复到修改之前的状态。

回退的今天13:00，得用今早8:00的备份，加上之后的日志，做前滚。

若回退的昨天早上9:00，得用昨天早上8:00的备份，加上8-9点间的日志做前滚。