Monthly Archives: 四月 2012

恢复备份控制文件避免resetlogs方式打开数据库

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在很多时候,我们需要使用备份控制文件恢复数据库,在恢复完成后,准备打开库,很多人知道这个时候如果要打开这个库,需要使用resetlogs操作,虽然在oracle 10g及其以后版本中在恢复的时候可以跨越resetlogs操作,但是很多时候大家还是希望使用备份的控制文件能够正常的open一个库,而不是resetlogs.这里通过实验展示使用备份控制文件正常open库的过程,整体思路是:先使用备份控制文件正常恢复数据库,然后重建该控制文件,继而可以正常open库

SQL> select * from v$version;

BANNER
--------------------------------------------------------------------------------
Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production
PL/SQL Release 9.2.0.4.0 - Production
CORE    9.2.0.3.0       Production
TNS for Linux: Version 9.2.0.4.0 - Production
NLSRTL Version 9.2.0.4.0 - Production

SQL> alter database backup controlfile to '/tmp/controlfile.bak';

Database altered.

SQL> alter system switch logfile;

System altered.

SQL> /

System altered.

SQL> /

System altered.

SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.

--替换备份的控制文件

SQL> startup mount;      
ORACLE instance started.

Total System Global Area  353441008 bytes
Fixed Size                   451824 bytes
Variable Size             184549376 bytes
Database Buffers          167772160 bytes
Redo Buffers                 667648 bytes
Database mounted.

SQL> recover database using backup controlfile;
ORA-00279: change 12286827844770 generated at 04/12/2012 00:21:54 needed for
thread 1
ORA-00289: suggestion : /u01/oracle/oradata/xifenfei/archive/1_4.dbf
ORA-00280: change 12286827844770 for thread 1 is in sequence #4


Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
auto
ORA-00279: change 12286827844772 generated at 04/12/2012 00:21:55 needed for
thread 1
ORA-00289: suggestion : /u01/oracle/oradata/xifenfei/archive/1_5.dbf
ORA-00280: change 12286827844772 for thread 1 is in sequence #5
ORA-00278: log file '/u01/oracle/oradata/xifenfei/archive/1_4.dbf' no longer
needed for this recovery


ORA-00279: change 12286827844776 generated at 04/12/2012 00:21:58 needed for
thread 1
ORA-00289: suggestion : /u01/oracle/oradata/xifenfei/archive/1_6.dbf
ORA-00280: change 12286827844776 for thread 1 is in sequence #6
ORA-00278: log file '/u01/oracle/oradata/xifenfei/archive/1_5.dbf' no longer
needed for this recovery


ORA-00308: cannot open archived log
'/u01/oracle/oradata/xifenfei/archive/1_6.dbf'
ORA-27037: unable to obtain file status
Linux Error: 2: No such file or directory
Additional information: 3

SQL>  recover database using backup controlfile;
ORA-00279: change 12286827844776 generated at 04/12/2012 00:21:58 needed for
thread 1
ORA-00289: suggestion : /u01/oracle/oradata/xifenfei/archive/1_6.dbf
ORA-00280: change 12286827844776 for thread 1 is in sequence #6


Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
/u01/oracle/oradata/xifenfei/redo02.log
ORA-00310: archived log contains sequence 3; sequence 6 required
ORA-00334: archived log: '/u01/oracle/oradata/xifenfei/redo02.log'


SQL>  recover database using backup controlfile;
ORA-00279: change 12286827844776 generated at 04/12/2012 00:21:58 needed for
thread 1
ORA-00289: suggestion : /u01/oracle/oradata/xifenfei/archive/1_6.dbf
ORA-00280: change 12286827844776 for thread 1 is in sequence #6


Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
/u01/oracle/oradata/xifenfei/redo03.log
Log applied.
Media recovery complete.
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01589: must use RESETLOGS or NORESETLOGS option for database open
--提示需要resetlogs

SQL> alter database backup controlfile to trace as '/tmp/1.txt';

Database altered.

SQL> shutdown immediate;
ORA-01109: database not open


Database dismounted.
ORACLE instance shut down.
SQL> STARTUP NOMOUNT
Total System Global Area  353441008 bytes
Fixed Size                   451824 bytes
Variable Size             184549376 bytes
Database Buffers          167772160 bytes
Redo Buffers                 667648 bytes

--重建控制文件
--自动启动到mount状态

--数据库直接open成功
SQL> alter database open;

Database altered.

9I中清除特定表相关执行计划

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在9i中因为某个执行计划因为Oracle Peeking绑定变量的控制导致现有的执行计划不正确,需要清除掉这条sql语句的执行计划.在10g中提供了dbms_shared_pool.purge(见:清除掉shared pool中某条sql语句方法),但是在9i中未提供好的方法,一般来说可以通过对相关表的DDL操作,收集统计信息,授权操作可以实现清除对于表执行计划.注:这些操作不会只清空特定SQL执行计划,而是会清除该表相关的所有执行计划,所以操作需要慎重(影响肯定比flush shared_pool小)
模拟测试数据

SQL> create table t_xifenfei (id number,name varchar2(100));

Table created.

SQL> insert into t_xifenfei values(1,'www.orasos.com');

1 row created.

SQL> commit;

清除执行计划1:修改表结构

SQL>  alter system flush shared_pool;

System altered.

SQL> select * from t_xifenfei;

        ID NAME
---------- -------------------
         1 www.orasos.com

SQL> select sql_text,HASH_VALUE from v$sqlAREA where sql_text like '%xifenfei';

SQL_TEXT                                           HASH_VALUE
-------------------------------------------------- ----------
select * from t_xifenfei                           1067507827

SQL> select OPERATION from v$sql_plan where hash_value=1067507827;

OPERATION
------------------------------------------------------------
SELECT STATEMENT
TABLE ACCESS

SQL> alter table t_xifenfei  add fei varchar2(10);

Table altered.

SQL> alter table t_xifenfei drop COLUMN fei;

Table altered.

SQL> select sql_text,HASH_VALUE from v$sqlAREA where sql_text like '%xifenfei';

SQL_TEXT                                           HASH_VALUE
-------------------------------------------------- ----------
select * from t_xifenfei                           1067507827

SQL>  select count(*) from v$sql_plan where hash_value=1067507827;

  COUNT(*)
----------
         0

清除执行计划2:重新收集统计信息

--DBMS_STATS收集统计信息
SQL> alter system flush shared_pool;

System altered.

SQL> select * from t_xifenfei;

        ID NAME
---------- -------------------
         1 www.orasos.com

SQL> select sql_text,HASH_VALUE from v$sqlAREA where sql_text like '%xifenfei';

SQL_TEXT                                           HASH_VALUE
-------------------------------------------------- ----------
select * from t_xifenfei                           1067507827

SQL> select OPERATION from v$sql_plan where hash_value=1067507827;

OPERATION
------------------------------------------------------------
SELECT STATEMENT
TABLE ACCESS

SQL> EXEC DBMS_STATS.gather_table_stats(user,'T_XIFENFEI');

PL/SQL procedure successfully completed.

SQL> select sql_text,HASH_VALUE from v$sqlAREA where sql_text like '%xifenfei';

SQL_TEXT                                           HASH_VALUE
-------------------------------------------------- ----------
select * from t_xifenfei                           1067507827

SQL> select OPERATION from v$sql_plan where hash_value=1067507827;

no rows selected


--analyze收集统计信息(不推荐)
SQL> alter system flush shared_pool;

System altered.

SQL> select * from t_xifenfei;

        ID NAME
---------- -------------------
         1 www.orasos.com

SQL> select sql_text,HASH_VALUE from v$sqlAREA where sql_text like '%xifenfei';

SQL_TEXT                                           HASH_VALUE
-------------------------------------------------- ----------
select * from t_xifenfei                           1067507827

SQL> select OPERATION from v$sql_plan where hash_value=1067507827;

OPERATION
------------------------------------------------------------
SELECT STATEMENT
TABLE ACCESS

SQL> analyze table  t_xifenfei compute statistics;

Table analyzed.

SQL> select sql_text,HASH_VALUE from v$sqlAREA where sql_text like '%xifenfei';

SQL_TEXT                                           HASH_VALUE
-------------------------------------------------- ----------
select * from t_xifenfei                           1067507827

SQL> select OPERATION from v$sql_plan where hash_value=1067507827;

no rows selected

清除执行计划3:创建INDEX

SQL> alter system flush shared_pool;

System altered.

SQL> select * from t_xifenfei;

        ID NAME
---------- -------------------
         1 www.orasos.com

SQL> select sql_text,HASH_VALUE from v$sqlAREA where sql_text like '%xifenfei';

SQL_TEXT                                           HASH_VALUE
-------------------------------------------------- ----------
select * from t_xifenfei                           1067507827

SQL>  select OPERATION from v$sql_plan where hash_value=1067507827;

OPERATION
------------------------------------------------------------
SELECT STATEMENT
TABLE ACCESS

SQL> create index i_txifenfei on t_xifenfei(id) online;

Index created.

SQL> drop index i_txifenfei ;

Index dropped.

SQL> select sql_text,HASH_VALUE from v$sqlAREA where sql_text like '%xifenfei';

SQL_TEXT                                           HASH_VALUE
-------------------------------------------------- ----------
select * from t_xifenfei                           1067507827

SQL> select OPERATION from v$sql_plan where hash_value=1067507827;

no rows selected

清除执行计划3:GRANT/REVOKE操作

SQL> alter system flush shared_pool;

System altered.

SQL> select * from t_xifenfei;

        ID NAME
---------- -------------------
         1 www.orasos.com

SQL> select sql_text,HASH_VALUE from v$sqlAREA where sql_text like '%xifenfei';

SQL_TEXT                                           HASH_VALUE
-------------------------------------------------- ----------
select * from t_xifenfei                           1067507827

SQL> select OPERATION from v$sql_plan where hash_value=1067507827;

OPERATION
------------------------------------------------------------
SELECT STATEMENT
TABLE ACCESS

SQL> GRANT SELECT ON T_XIFENFEI TO SYSTEM;

Grant succeeded.

SQL> select sql_text,HASH_VALUE from v$sqlAREA where sql_text like '%xifenfei';

SQL_TEXT                                           HASH_VALUE
-------------------------------------------------- ----------
select * from t_xifenfei                           1067507827

SQL> select OPERATION from v$sql_plan where hash_value=1067507827;

no rows selected

DB2备份恢复(不完全恢复)

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全备数据库

[db2inst1@xifenfei ~]$ db2 backup db xff online to /tmp  include logs

Backup successful. The timestamp for this backup image is : 20120411213218

[db2inst1@xifenfei ~]$ db2 list history backup all for xff

                    List History File for xff

Number of matching file entries = 1


 Op Obj Timestamp+Sequence Type Dev Earliest Log Current Log  Backup ID
 -- --- ------------------ ---- --- ------------ ------------ --------------
  B  D  20120411213218001   N    D  S0000021.LOG S0000021.LOG  
 ----------------------------------------------------------------------------
  Contains 3 tablespace(s):

 00001 SYSCATSPACE
 00002 USERSPACE1
 00003 SYSTOOLSPACE
 ----------------------------------------------------------------------------
    Comment: DB2 BACKUP XFF ONLINE
 Start Time: 20120411213218
   End Time: 20120411213229
     Status: A
 ----------------------------------------------------------------------------
  EID: 42 Location: /tmp

数据操作(包括误操作)

[db2inst1@xifenfei ~]$ db2 connect to xff

   Database Connection Information

 Database server        = DB2/LINUX 9.5.9
 SQL authorization ID   = DB2INST1
 Local database alias   = XFF

[db2inst1@xifenfei ~]$ db2 list tables

Table/View                      Schema          Type  Creation time             
------------------------------- --------------- ----- --------------------------
T_01XFF                         DB2INST1        T     2012-04-11-18.23.05.723478
T_02XFF                         DB2INST1        T     2012-04-11-18.30.26.639326

  2 record(s) selected.

[db2inst1@xifenfei ~]$ db2 "create table t_03xff like t_01xff"
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ db2 "insert into t_03xff select * from t_01xff"
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ date
Wed Apr 11 21:33:42 CST 2012
[db2inst1@xifenfei ~]$ db2 "select count(*) from t_03xff"

1          
-----------
        370

  1 record(s) selected.

--以下是错误操作,需要回滚
[db2inst1@xifenfei ~]$ date
Wed Apr 11 21:36:38 CST 2012
[db2inst1@xifenfei ~]$ db2 "insert into t_03xff select * from t_01xff"
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ db2 "select count(*) from t_03xff"

1          
-----------
        740

  1 record(s) selected.

还原数据库

db2inst1@xifenfei ~]$ db2 restore db xff from /tmp taken at 20120411213218
SQL2539W  Warning!  Restoring to an existing database that is the same as the 
backup image database.  The database files will be deleted.
Do you want to continue ? (y/n) y
DB20000I  The RESTORE DATABASE command completed successfully.

恢复数据库

[db2inst1@xifenfei ~]$ db2 rollforward db xff to 2012-04-11-21.36.00.00000 using local time

                                 Rollforward Status

 Input database alias                   = xff
 Number of nodes have returned status   = 1

 Node number                            = 0
 Rollforward status                     = DB  working
 Next log file to be read               = S0000023.LOG
 Log files processed                    = S0000021.LOG - S0000021.LOG
 Last committed transaction             = 2012-04-11-21.33.27.000000 Local

DB20000I  The ROLLFORWARD command completed successfully.
[db2inst1@xifenfei ~]$ db2 connect to xff
SQL1117N  A connection to or activation of database "XIFENFEI" cannot be made 
because of ROLL-FORWARD PENDING.  SQLSTATE=57019

--停止前滚
[db2inst1@xifenfei ~]$ db2 rollforward db xff stop

                                 Rollforward Status

 Input database alias                   = xff
 Number of nodes have returned status   = 1

 Node number                            = 0
 Rollforward status                     = not pending
 Next log file to be read               =
 Log files processed                    = S0000021.LOG - S0000022.LOG
 Last committed transaction             = 2012-04-11-21.33.27.000000 Local

DB20000I  The ROLLFORWARD command completed successfully.

验证数据

[db2inst1@xifenfei ~]$ db2 connect to xff

   Database Connection Information

 Database server        = DB2/LINUX 9.5.9
 SQL authorization ID   = DB2INST1
 Local database alias   = XFF

[db2inst1@xifenfei ~]$ db2 "select count(*) from t_03xff"

1          
-----------
        370

  1 record(s) selected.
Posted in DB2 |

重建 Datapump Utility EXPDP/IMPDP

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因为数据库内部错误,数据字典不一致等原因导致 DataPump不能被正常使用,这个时候可以尝试着通过重建 DataPump来解决问题
sysdba登录数据库

SQL> connect / as sysdba

For Oracle version 10.1

1. Catdp.sql orders the installation of all its components including 
   the Metadata API which was previously installed separately.
   By default catproc.sql invoke this script.
SQL >@ $ORACLE_HOME/rdbms/admin/catdp.sql

2. dbmspump.sql will create DBMS procedures for dataPUMP
SQL >@ $ORACLE_HOME/rdbms/admin/dbmspump.sql

For Oracle version 10.2

1. Catdph.sql will Re-Install DataPump types and views
SQL >@ $ORACLE_HOME/rdbms/admin/catdph.sql 

Use this code to verify if XDB is installed:
SQL> select substr(comp_name,1,30) comp_name, substr(comp_id,1,10)
     comp_id,substr(version,1,12) version,status 
     from dba_registry where comp_id='XDB';

Sample output if XDB installed,
Oracle XML Database            XDB        -version-   VALID

Note: If XDB is installed, then it is required to run "catmetx.sql" script also.
SQL> @ $ORACLE_HOME/rdbms/admin/catmetx.sql


2. prvtdtde.plb will Re-Install tde_library packages
SQL >@ $ORACLE_HOME/rdbms/admin/prvtdtde.plb 


3. Catdpb.sql will Re-Install DataPump packages
SQL >@ $ORACLE_HOME/rdbms/admin/catdpb.sql 


4.Dbmspump.sql will Re-Install DBMS DataPump objects
SQL >@ $ORACLE_HOME/rdbms/admin/dbmspump.sql 


5. To recompile  invalid objects, if any
SQL >@ $ORACLE_HOME/rdbms/admin/utlrp.sql

For Oracle version 11g

1. Catproc.sql 
SQL >@ $ORACLE_HOME/rdbms/admin/catproc.sql 

2. To recompile invalid objects, if any
SQL >@ $ORACLE_HOME/rdbms/admin/utlrp.sql

参考:How To Reload Datapump Utility EXPDP/IMPDP [ID 430221.1]

DB2备份恢复(增量备份与恢复)

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全备数据库

[db2inst1@xifenfei ~]$ db2 backup db xff online to /tmp  include logs

Backup successful. The timestamp for this backup image is : 20120411181918


[db2inst1@xifenfei ~]$ db2 list history backup all for xff

                    List History File for xff

Number of matching file entries = 1


 Op Obj Timestamp+Sequence Type Dev Earliest Log Current Log  Backup ID
 -- --- ------------------ ---- --- ------------ ------------ --------------
  B  D  20120411181918001   N    D  S0000015.LOG S0000015.LOG  
 ----------------------------------------------------------------------------
  Contains 3 tablespace(s):

 00001 SYSCATSPACE
 00002 USERSPACE1
 00003 SYSTOOLSPACE
 ----------------------------------------------------------------------------
    Comment: DB2 BACKUP XFF ONLINE
 Start Time: 20120411181918
   End Time: 20120411181925
     Status: A
 ----------------------------------------------------------------------------
  EID: 27 Location: /tmp

修改数据

[db2inst1@xifenfei ~]$ db2 list tables

Table/View                      Schema          Type  Creation time             
------------------------------- --------------- ----- --------------------------
T_XFF                           DB2INST1        T     2012-04-05-09.45.29.148434
T_XIFENFEI                      DB2INST1        T     2012-04-06-05.50.11.111469
T_XIFENFEI01                    DB2INST1        T     2012-04-11-16.55.51.853649

  3 record(s) selected.


[db2inst1@xifenfei ~]$ db2 "drop table t_xff"
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ db2 "drop table t_xifenfei"
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ db2 "drop table t_xifenfei01"
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ db2 "create table t_01xff like syscat.tables"
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ db2 "insert into t_01xff select * from syscat.tables"
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ db2 "select count(*) from t_01xff"

1          
-----------
        370

  1 record(s) selected.

[db2inst1@xifenfei ~]$ db2 list tables

Table/View                      Schema          Type  Creation time             
------------------------------- --------------- ----- --------------------------
T_01XFF                         DB2INST1        T     2012-04-11-18.23.05.723478

  1 record(s) selected.

增量备份SQL2426N解决

[db2inst1@xifenfei ~]$ db2 backup db xff online incremental to /tmp 
SQL2426N  The database has not been configured to allow the incremental backup 
operation. Reason code = "1".

[db2inst1@xifenfei ~]$ db2 ? SQL2426N


SQL2426N  The database has not been configured to allow the incremental
      backup operation. Reason code = "<reason-code>".

Explanation: 

Incremental backups are not enabled for a table space until after
modification tracking has been activated for the database and a
non-incremental backup has been performed on the table space.

Possible reason codes: 
1. The configuration parameter TRACKMOD has not been set for the
   database.
2. The TRACKMOD configuration parameter has been set but at least one
   table space has not had a non-incremental backup taken since the
   TRACKMOD parameter was set.

User response: 

The action is based on the reason code as follows: 
1. Activate modification tracking for the database by setting the
   TRACKMOD database configuration parameter to on, then perform a full
   database backup.
2. Consult the db2diag.log file to determine the name of the table
   space, then perform a full backup of that table space.

[db2inst1@xifenfei ~]$ db2 get db cfg for xff|grep TRACKMOD
 Track modified pages                         (TRACKMOD) = NO

[db2inst1@xifenfei ~]$ db2 update db cfg for xff using TRACKMOD ON
DB20000I  The UPDATE DATABASE CONFIGURATION command completed successfully.
SQL1363W  One or more of the parameters submitted for immediate modification 
were not changed dynamically. For these configuration parameters, the database 
must be shutdown and reactivated before the configuration parameter changes 
become effective.

[db2inst1@xifenfei ~]$ db2stop force
04/11/2012 17:49:59     0   0   SQL1064N  DB2STOP processing was successful.
SQL1064N  DB2STOP processing was successful.
[db2inst1@xifenfei ~]$ db2start
04/11/2012 17:50:09     0   0   SQL1063N  DB2START processing was successful.
SQL1063N  DB2START processing was successful.

累积增量备份

[db2inst1@xifenfei ~]$ db2 backup db xff online incremental to /tmp

Backup successful. The timestamp for this backup image is : 20120411182708

[db2inst1@xifenfei ~]$ db2 list history backup all for xff

                    List History File for xff

Number of matching file entries = 2


 Op Obj Timestamp+Sequence Type Dev Earliest Log Current Log  Backup ID
 -- --- ------------------ ---- --- ------------ ------------ --------------
  B  D  20120411181918001   N    D  S0000015.LOG S0000015.LOG  
 ----------------------------------------------------------------------------
  Contains 3 tablespace(s):

 00001 SYSCATSPACE
 00002 USERSPACE1
 00003 SYSTOOLSPACE
 ----------------------------------------------------------------------------
    Comment: DB2 BACKUP XFF ONLINE
 Start Time: 20120411181918
   End Time: 20120411181925
     Status: A
 ----------------------------------------------------------------------------
  EID: 27 Location: /tmp


 Op Obj Timestamp+Sequence Type Dev Earliest Log Current Log  Backup ID
 -- --- ------------------ ---- --- ------------ ------------ --------------
  B  D  20120411182708001   O    D  S0000017.LOG S0000017.LOG  
 ----------------------------------------------------------------------------
  Contains 3 tablespace(s):

 00001 SYSCATSPACE
 00002 USERSPACE1
 00003 SYSTOOLSPACE
 ----------------------------------------------------------------------------
    Comment: DB2 BACKUP XFF ONLINE
 Start Time: 20120411182708
   End Time: 20120411182712
     Status: A
 ----------------------------------------------------------------------------
  EID: 33 Location: /tmp

再次修改数据

[db2inst1@xifenfei ~]$ db2 "create table t_02xff like syscat.tables"
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ db2 "insert into t_02xff select * from syscat.tables"
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ db2 list tables

Table/View                      Schema          Type  Creation time             
------------------------------- --------------- ----- --------------------------
T_01XFF                         DB2INST1        T     2012-04-11-18.23.05.723478
T_02XFF                         DB2INST1        T     2012-04-11-18.30.26.639326

  2 record(s) selected.

[db2inst1@xifenfei ~]$ db2 "select count(*) from t_02xff"

1          
-----------
        371

  1 record(s) selected.

迭代备份

[db2inst1@xifenfei ~]$ db2 backup db xff online incremental delta to /tmp

Backup successful. The timestamp for this backup image is : 20120411183129

[db2inst1@xifenfei ~]$ ll /tmp/XFF*
-rw-------  1 db2inst1 db2iadm1 122044416 Apr 11 18:19 /tmp/XFF.0.db2inst1.NODE0000.CATN0000.20120411181918.001
-rw-------  1 db2inst1 db2iadm1  55128064 Apr 11 18:27 /tmp/XFF.0.db2inst1.NODE0000.CATN0000.20120411182708.001
-rw-------  1 db2inst1 db2iadm1  55128064 Apr 11 18:31 /tmp/XFF.0.db2inst1.NODE0000.CATN0000.20120411183129.001
--这里可以看出最近一次的增量备份和迭代备份备份文件大小相同,说明迭代备份是在最近一次增量备份基础之上进行

[db2inst1@xifenfei ~]$ db2 list history backup all for xff

                    List History File for xff

Number of matching file entries = 3


 Op Obj Timestamp+Sequence Type Dev Earliest Log Current Log  Backup ID
 -- --- ------------------ ---- --- ------------ ------------ --------------
  B  D  20120411181918001   N    D  S0000015.LOG S0000015.LOG  
 ----------------------------------------------------------------------------
  Contains 3 tablespace(s):

 00001 SYSCATSPACE
 00002 USERSPACE1
 00003 SYSTOOLSPACE
 ----------------------------------------------------------------------------
    Comment: DB2 BACKUP XFF ONLINE
 Start Time: 20120411181918
   End Time: 20120411181925
     Status: A
 ----------------------------------------------------------------------------
  EID: 27 Location: /tmp


 Op Obj Timestamp+Sequence Type Dev Earliest Log Current Log  Backup ID
 -- --- ------------------ ---- --- ------------ ------------ --------------
  B  D  20120411182708001   O    D  S0000017.LOG S0000017.LOG  
 ----------------------------------------------------------------------------
  Contains 3 tablespace(s):

 00001 SYSCATSPACE
 00002 USERSPACE1
 00003 SYSTOOLSPACE
 ----------------------------------------------------------------------------
    Comment: DB2 BACKUP XFF ONLINE
 Start Time: 20120411182708
   End Time: 20120411182712
     Status: A
 ----------------------------------------------------------------------------
  EID: 33 Location: /tmp


 Op Obj Timestamp+Sequence Type Dev Earliest Log Current Log  Backup ID
 -- --- ------------------ ---- --- ------------ ------------ --------------
  B  D  20120411183129001   E    D  S0000019.LOG S0000019.LOG  
 ----------------------------------------------------------------------------
  Contains 3 tablespace(s):

 00001 SYSCATSPACE
 00002 USERSPACE1
 00003 SYSTOOLSPACE
 ----------------------------------------------------------------------------
    Comment: DB2 BACKUP XFF ONLINE
 Start Time: 20120411183129
   End Time: 20120411183133
     Status: A
 ----------------------------------------------------------------------------
  EID: 36 Location: /tmp

还原数据库

[db2inst1@xifenfei ~]$ db2 restore db xff  incremental automatic from /tmp taken at 20120411183129
SQL2539W  Warning!  Restoring to an existing database that is the same as the 
backup image database.  The database files will be deleted.
Do you want to continue ? (y/n) y
DB20000I  The RESTORE DATABASE command completed successfully.

尝试登陆数据库

[db2inst1@xifenfei ~]$ db2 connect to xff
SQL1117N  A connection to or activation of database "XIFENFEI" cannot be made 
because of ROLL-FORWARD PENDING.  SQLSTATE=57019
--数据库需要前滚,因为是在线备份

恢复数据库

[db2inst1@xifenfei ~]$  db2 "rollforward db xff to end of logs and stop"

                                 Rollforward Status

 Input database alias                   = xff
 Number of nodes have returned status   = 1

 Node number                            = 0
 Rollforward status                     = not pending
 Next log file to be read               =
 Log files processed                    = S0000019.LOG - S0000019.LOG
 Last committed transaction             = 2012-04-11-10.31.30.000000 UTC

DB20000I  The ROLLFORWARD command completed successfully.

验证恢复过程

[db2inst1@xifenfei ~]$ db2 connect to xff

   Database Connection Information

 Database server        = DB2/LINUX 9.5.9
 SQL authorization ID   = DB2INST1
 Local database alias   = XFF

[db2inst1@xifenfei ~]$ db2 list tables

Table/View                      Schema          Type  Creation time             
------------------------------- --------------- ----- --------------------------
T_01XFF                         DB2INST1        T     2012-04-11-18.23.05.723478
T_02XFF                         DB2INST1        T     2012-04-11-18.30.26.639326

  2 record(s) selected.

[db2inst1@xifenfei ~]$ db2 "select count(*) from t_01xff"

1          
-----------
        370

  1 record(s) selected.

[db2inst1@xifenfei ~]$ db2 "select count(*) from t_02xff"

1          
-----------
        371

  1 record(s) selected.

本篇主要测试了增量备份和数据库恢复,在下篇中将对不完全恢复进行测试,坚持逐步学习db2数据库相关知识

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