DB2数据库的备份与恢复
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一、 查看数据库
[db2inst1@localhost ~]$ db2 list db directory
二、 创建测试数据库
$ db2 create database test
三、 启动进入创建的测试库
$ db2 connect to test
l 列出激活的库
$ db2 list active databases
l 查看表空间
$ db2 list tablespaces
l 列出库中的表
$ db2 list tables
Table/View Schema Type Creation time
------------------------------- --------------- ----- --------------------------
0 record(s) selected.
l 创建表
$ db2 "create table student(id int,fname varchar(30),age int)"
l 赋予用户权限
db2 "grant use of tablespace TABLESPACE_TEST to user XXX"
l 向表中插入数据
$ db2 "insert into student values (1,'Tom',22)"
l 查询表内容
四、 在线备份
备份指定库
$ db2 backup db TEST online to /opt/dbbak include logs
如果报:
SQL2413N Online backup is not allowed because the database is not recoverable
or a backup pending condition is in effect.
原因:数据库在线备份需要启用归档日志功能,刚装的数据库是没有启用的
备份到null
db2 backup db idsldap online to /dev/null
Backup successful. The timestamp for this backup image is : 20161228092925
增量备份:
/usr/bin/su - db2inst1 -c "db2 backup db FDBKDB61 online incremental use tsm >>/IBM/tsm/db2inst1/FDBKDB61_incbk.log 2>&1"
l 查看归档设置
$ db2 get db cfg for test|grep -i LOGARCHMETH
l 设置归档路径
$ db2 update db cfg using logarchmeth2 disk:/opt/dbbak/arch
如果报
SQL1024N A database connection does not exist. SQLSTATE=08003
原因:需要备份数据库一次,然后在修改主日志文件和此日志文件的归档路径
解决方法:要连接数据库时要备份一下。
解决方法:(需要离线备份一次,再连接数据库)
l 显示应用状态
$ db2 list applications
l 停掉数据库应用
$ db2 force applications all
l 再查看应用状态,无输出
$ db2 list applications
SQL1611W No data was returned by Database System Monitor.
l 做离线备份
$ db2 backup db TEST to /opt/dbbak
l 生成备份文件和归档日志
l 查看备份记录
> db2adutl query //该命令是TSM集成命令,无TSM环境不能执行
$ db2 list history backup all for test
l 启动进入库
$ db2 connect to test
l 再做在线备份,可以进行
$ db2 backup db TEST online to /opt/dbbak include logs
五、 删除数据库模拟破坏
$ db2 drop db test
$ db2 connect to test
SQL1013N The database alias name or database name "TEST" could not be found.
SQLSTATE=42705
六、 恢复数据库
$ db2 restore db TEST from /opt/bak taken at 20170123152954
$ db2 restore db test taken at 20160513020408
这时候,连接数据库,提示:
SQL1117N A connection to or activation of database "TEST" cannot be made
because of ROLL-FORWARD PENDING. SQLSTATE=57019
在前滚已经过大于或等于 这个 的时间点之前,数据库 "XXX"
不能脱离前滚暂挂状态,因为节点 "0"中包含比指定时间更新的信息
解决办法:前滚日志
$ db2 rollforward database test to end of logs and complete
如果报:
SQL4970N Rollforward recovery stopped on the database named "TEST" because
the rollforward utility cannot reach the specified stop point (end-of-log or
point-in-time) on the following database partitions: "0".
解决办法:恢复日志
$ db2 restore db test logs from /opt/dbbak/ taken at 20160513020408 logtarget /opt/dbbak/
复制恢复的归档文件
$ cp /opt/dbbak/S0000000.LOG /home/db2inst1/db2inst1/NODE0000/SQL00002/LOGSTREAM0000/LOGSTREAM0000
l 启动进入数据库
l 查询表和数据
数据恢复回来
l 关闭应用和库
$ db2 force applications all
$ db2stop force
SQL1064N DB2STOP processing was successful.
本文名称:DB2数据库的备份与恢复
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