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

日志模式

[db2inst1@xifenfei ~]$ db2 get db cfg for xff |grep -i log
 Log retain for recovery status                          = NO
 User exit for logging status                            = YES   --(1)
 Catalog cache size (4KB)              (CATALOGCACHE_SZ) = 260
 Log buffer size (4KB)                        (LOGBUFSZ) = 98
 Log file size (4KB)                         (LOGFILSIZ) = 1024
 Number of primary log files                (LOGPRIMARY) = 6
 Number of secondary log files               (LOGSECOND) = 4
 Changed path to log files                  (NEWLOGPATH) = 
 Path to log files                                       = /home/db2inst1/xff/redolog/NODE0000/
 Overflow log path                     (OVERFLOWLOGPATH) = 
 Mirror log path                         (MIRRORLOGPATH) = 
 First active log file                                   = S0000013.LOG
 Block log on disk full                (BLK_LOG_DSK_FUL) = NO
 Block non logged operations            (BLOCKNONLOGGED) = NO
 Percent max primary log space by transaction  (MAX_LOG) = 0
 Num. of active log files for 1 active UOW(NUM_LOG_SPAN) = 0
 Percent log file reclaimed before soft chckpt (SOFTMAX) = 520
 Log retain for recovery enabled             (LOGRETAIN) = OFF
 User exit for logging enabled                (USEREXIT) = OFF
 HADR log write synchronization mode     (HADR_SYNCMODE) = NEARSYNC
 First log archive method                 (LOGARCHMETH1) = DISK:/home/db2inst1/xff/archivelog/  --(2)
 Options for logarchmeth1                  (LOGARCHOPT1) = 
 Second log archive method                (LOGARCHMETH2) = OFF
 Options for logarchmeth2                  (LOGARCHOPT2) = 
 Failover log archive path                (FAILARCHPATH) = 
 Number of log archive retries on error   (NUMARCHRETRY) = 5
 Log archive retry Delay (secs)         (ARCHRETRYDELAY) = 20
 Log pages during index build            (LOGINDEXBUILD) = OFF

由(1)和(2)可以判断该数据库处于归档日志模式下

查看当前存在备份

[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  20120406053431001   F    D  S0000000.LOG S0000000.LOG  
 ----------------------------------------------------------------------------
  Contains 2 tablespace(s):

 00001 SYSCATSPACE
 00002 USERSPACE1
 ----------------------------------------------------------------------------
    Comment: DB2 BACKUP XFF OFFLINE    --离线备份
 Start Time: 20120406053431
   End Time: 20120406053439
     Status: A
 ----------------------------------------------------------------------------
  EID: 1 Location: /tmp

在线全备

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

Backup successful. The timestamp for this backup image is : 20120411165312

[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  20120406053431001   F    D  S0000000.LOG S0000000.LOG  
 ----------------------------------------------------------------------------
  Contains 2 tablespace(s):

 00001 SYSCATSPACE
 00002 USERSPACE1
 ----------------------------------------------------------------------------
    Comment: DB2 BACKUP XFF OFFLINE  --本次试验的online备份
 Start Time: 20120406053431
   End Time: 20120406053439
     Status: A
 ----------------------------------------------------------------------------
  EID: 1 Location: /tmp


 Op Obj Timestamp+Sequence Type Dev Earliest Log Current Log  Backup ID
 -- --- ------------------ ---- --- ------------ ------------ --------------
  B  D  20120411165312001   N    D  S0000013.LOG S0000013.LOG  
 ----------------------------------------------------------------------------
  Contains 3 tablespace(s):

 00001 SYSCATSPACE
 00002 USERSPACE1
 00003 SYSTOOLSPACE
 ----------------------------------------------------------------------------
    Comment: DB2 BACKUP XFF ONLINE
 Start Time: 20120411165312
   End Time: 20120411165322
     Status: A
 ----------------------------------------------------------------------------
  EID: 19 Location: /tmp

当前数据库当前数据

[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 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

  2 record(s) selected.

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

1          
-----------
        734

  1 record(s) selected.

恢复数据库

[db2inst1@xifenfei ~]$ db2 restore db xff from /tmp taken at 20120411165312
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.
[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                    = S0000013.LOG - S0000014.LOG
 Last committed transaction             = 2012-04-11-08.56.20.000000 UTC

DB20000I  The ROLLFORWARD command completed successfully.
[db2inst1@xifenfei ~]$ db connect to xff
-bash: db: command not found
[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_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 "select count(*) from t_xifenfei01"

1          
-----------
        734

  1 record(s) selected.

备份恢复是dba最重要的职责,本篇做为db2学习过程中第一篇关于备份恢复文章,后续将继续学习db2增量备份恢复等知识.

cfg关于log参数

[db2inst1@xifenfei ~]$ db2 get db cfg for xff|grep -i log
 Log retain for recovery status                          = NO
 User exit for logging status                            = NO
 Catalog cache size (4KB)              (CATALOGCACHE_SZ) = 260
 Log buffer size (4KB)                        (LOGBUFSZ) = 98
 Log file size (4KB)                         (LOGFILSIZ) = 1024
 Number of primary log files                (LOGPRIMARY) = 13
 Number of secondary log files               (LOGSECOND) = 4
 Changed path to log files                  (NEWLOGPATH) = 
 Path to log files                                       = /home/db2inst1/db2inst1/NODE0000/SQL00003/SQLOGDIR/
 Overflow log path                     (OVERFLOWLOGPATH) = 
 Mirror log path                         (MIRRORLOGPATH) = 
 First active log file                                   = 
 Block log on disk full                (BLK_LOG_DSK_FUL) = NO
 Block non logged operations            (BLOCKNONLOGGED) = NO
 Percent max primary log space by transaction  (MAX_LOG) = 0
 Num. of active log files for 1 active UOW(NUM_LOG_SPAN) = 0
 Percent log file reclaimed before soft chckpt (SOFTMAX) = 520
 Log retain for recovery enabled             (LOGRETAIN) = OFF
 User exit for logging enabled                (USEREXIT) = OFF
 HADR log write synchronization mode     (HADR_SYNCMODE) = NEARSYNC
 First log archive method                 (LOGARCHMETH1) = OFF
 Options for logarchmeth1                  (LOGARCHOPT1) = 
 Second log archive method                (LOGARCHMETH2) = OFF
 Options for logarchmeth2                  (LOGARCHOPT2) = 
 Failover log archive path                (FAILARCHPATH) = 
 Number of log archive retries on error   (NUMARCHRETRY) = 5
 Log archive retry Delay (secs)         (ARCHRETRYDELAY) = 20
 Log pages during index build            (LOGINDEXBUILD) = OFF

LOGPRIMARY:主日志组日志文件个数(首次连接或激活时直接分配)
LOGSECOND:辅助日志组日志文件个数(主日志文件写满时按需分配)
LOGFILSIZ:每个日志文件页数,每页大小为4K
LOGARCHMETH1/LOGARCHMETH2:OFF表示循环模式,其他值表示归档模式(disk:/xifenfei/archive)
NEWLOGPATH:修改新的日志路径
LOGBUFSZ:日志缓冲区大小
MIRRORLOGPATH:日志镜像路径
LOGRETAIN:归档日志保留在日志文件中(不推荐该做法)
USEREXIT:归档日志通过用户出口程序管理(8.2后不推荐该做法)

当前日志位置

[db2inst1@xifenfei ~]$ ls -l /home/db2inst1/db2inst1/NODE0000/SQL00003/SQLOGDIR/
total 53404
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  5 16:20 S0000000.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  5 16:20 S0000001.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  5 16:20 S0000002.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  5 16:20 S0000003.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  5 16:20 S0000004.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  5 16:20 S0000005.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  5 16:20 S0000006.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  5 16:20 S0000007.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  5 16:20 S0000008.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  5 16:20 S0000009.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  5 16:20 S0000010.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  5 16:20 S0000011.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  5 16:20 S0000012.LOG

修改cfg参数(改为归档模式)

[db2inst1@xifenfei ~]$ db2 update db cfg for xff using LOGPRIMARY 6
DB20000I  The UPDATE DATABASE CONFIGURATION command completed successfully.
[db2inst1@xifenfei ~]$ mkdir -p  xff/redolog
[db2inst1@xifenfei ~]$ mkdir -p  xff/archivelog
[db2inst1@xifenfei ~]$ db2 update db cfg for xff using NEWLOGPATH /home/db2inst1/xff/redolog
DB20000I  The UPDATE DATABASE CONFIGURATION command completed successfully.
[db2inst1@xifenfei ~]$ db2 update db cfg for xff using LOGARCHMETH1 disk:/home/db2inst1/xff/archivelog
DB20000I  The UPDATE DATABASE CONFIGURATION command completed successfully.

查看修改后参数

[db2inst1@xifenfei ~]$ db2 get db cfg for xff|grep -i log
 Log retain for recovery status                          = NO
 User exit for logging status                            = NO   --没有生效
 Catalog cache size (4KB)              (CATALOGCACHE_SZ) = 260
 Log buffer size (4KB)                        (LOGBUFSZ) = 98
 Log file size (4KB)                         (LOGFILSIZ) = 1024
 Number of primary log files                (LOGPRIMARY) = 6
 Number of secondary log files               (LOGSECOND) = 4
 Changed path to log files                  (NEWLOGPATH) = /home/db2inst1/xff/redolog/NODE0000/
 Path to log files                                       = /home/db2inst1/db2inst1/NODE0000/SQL00003/SQLOGDIR/
 Overflow log path                     (OVERFLOWLOGPATH) = 
 Mirror log path                         (MIRRORLOGPATH) = 
 First active log file                                   = 
 Block log on disk full                (BLK_LOG_DSK_FUL) = NO
 Block non logged operations            (BLOCKNONLOGGED) = NO
 Percent max primary log space by transaction  (MAX_LOG) = 0
 Num. of active log files for 1 active UOW(NUM_LOG_SPAN) = 0
 Percent log file reclaimed before soft chckpt (SOFTMAX) = 520
 Log retain for recovery enabled             (LOGRETAIN) = OFF
 User exit for logging enabled                (USEREXIT) = OFF
 HADR log write synchronization mode     (HADR_SYNCMODE) = NEARSYNC
 First log archive method                 (LOGARCHMETH1) = DISK:/home/db2inst1/xff/archivelog/
 Options for logarchmeth1                  (LOGARCHOPT1) = 
 Second log archive method                (LOGARCHMETH2) = OFF
 Options for logarchmeth2                  (LOGARCHOPT2) = 
 Failover log archive path                (FAILARCHPATH) = 
 Number of log archive retries on error   (NUMARCHRETRY) = 5
 Log archive retry Delay (secs)         (ARCHRETRYDELAY) = 20
 Log pages during index build            (LOGINDEXBUILD) = OFF

参数生效情况

[db2inst1@xifenfei ~]$ ll /home/db2inst1/xff/redolog/NODE0000/
total 0
[db2inst1@xifenfei ~]$ db2stop
04/06/2012 05:33:24     0   0   SQL1064N  DB2STOP processing was successful.
SQL1064N  DB2STOP processing was successful.
[db2inst1@xifenfei ~]$ db2start
04/06/2012 05:33:34     0   0   SQL1063N  DB2START processing was successful.
SQL1063N  DB2START processing was successful.
[db2inst1@xifenfei ~]$ ll /home/db2inst1/xff/redolog/NODE0000/
total 0
[db2inst1@xifenfei ~]$ db2 connect to xff
SQL1116N  A connection to or activation of database "XIFENFEI" cannot be made 
because of BACKUP PENDING.  SQLSTATE=57019
[db2inst1@xifenfei ~]$ db2 backup db xff to /tmp

Backup successful. The timestamp for this backup image is : 20120406053431

[db2inst1@xifenfei ~]$ ll /home/db2inst1/xff/redolog/NODE0000/
total 24652
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  6 05:33 S0000000.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  6 05:33 S0000001.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  6 05:33 S0000002.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  6 05:33 S0000003.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  6 05:33 S0000004.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  6 05:33 S0000005.LOG
-rw-------  1 db2inst1 db2iadm1     512 Apr  6 05:33 SQLLPATH.TAG
[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 get db cfg for xff|grep -i log
 Log retain for recovery status                          = NO
 User exit for logging status                            = YES
 Catalog cache size (4KB)              (CATALOGCACHE_SZ) = 260
 Log buffer size (4KB)                        (LOGBUFSZ) = 98
 Log file size (4KB)                         (LOGFILSIZ) = 1024
 Number of primary log files                (LOGPRIMARY) = 6
 Number of secondary log files               (LOGSECOND) = 4
 Changed path to log files                  (NEWLOGPATH) = 
 Path to log files                                       = /home/db2inst1/xff/redolog/NODE0000/
 Overflow log path                     (OVERFLOWLOGPATH) = 
 Mirror log path                         (MIRRORLOGPATH) = 
 First active log file                                   = S0000005.LOG
 Block log on disk full                (BLK_LOG_DSK_FUL) = NO
 Block non logged operations            (BLOCKNONLOGGED) = NO
 Percent max primary log space by transaction  (MAX_LOG) = 0
 Num. of active log files for 1 active UOW(NUM_LOG_SPAN) = 0
 Percent log file reclaimed before soft chckpt (SOFTMAX) = 520
 Log retain for recovery enabled             (LOGRETAIN) = OFF
 User exit for logging enabled                (USEREXIT) = OFF
 HADR log write synchronization mode     (HADR_SYNCMODE) = NEARSYNC
 First log archive method                 (LOGARCHMETH1) = DISK:/home/db2inst1/xff/archivelog/
 Options for logarchmeth1                  (LOGARCHOPT1) = 
 Second log archive method                (LOGARCHMETH2) = OFF
 Options for logarchmeth2                  (LOGARCHOPT2) = 
 Failover log archive path                (FAILARCHPATH) = 
 Number of log archive retries on error   (NUMARCHRETRY) = 5
 Log archive retry Delay (secs)         (ARCHRETRYDELAY) = 20
 Log pages during index build            (LOGINDEXBUILD) = OFF

修改备份模式参数需要重启并且备份库后生效

测试归档日志

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

                    List History File for xff

Number of matching file entries = 0

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

1          
-----------
      94208

  1 record(s) selected.

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

                    List History File for xff

Number of matching file entries = 11


 Op Obj Timestamp+Sequence Type Dev Earliest Log Current Log  Backup ID
 -- --- ------------------ ---- --- ------------ ------------ --------------
  X  D  20120406054854      1    D  S0000000.LOG C0000000      
 ----------------------------------------------------------------------------

 ----------------------------------------------------------------------------
    Comment: 
 Start Time: 20120406054854
   End Time: 20120406055029
     Status: A
 ----------------------------------------------------------------------------
  EID: 2 Location: /home/db2inst1/xff/archivelog/db2inst1/XIFENFEI/NODE0000/C0000000/S0000000.LOG

……省略……

 Op Obj Timestamp+Sequence Type Dev Earliest Log Current Log  Backup ID
 -- --- ------------------ ---- --- ------------ ------------ --------------
  X  D  20120406055041      P    D  S0000010.LOG C0000000      
 ----------------------------------------------------------------------------

 ----------------------------------------------------------------------------
    Comment: 
 Start Time: 20120406055041
   End Time: 
     Status: A
 ----------------------------------------------------------------------------
  EID: 14 Location: /home/db2inst1/xff/redolog/NODE0000/S0000010.LOG

[db2inst1@xifenfei ~]$ ll /home/db2inst1/xff/archivelog/db2inst1/XIFENFEI/NODE0000/C0000000
total 41080
-rw-r-----  1 db2inst1 db2iadm1 4202496 Apr  6 05:50 S0000000.LOG
-rw-r-----  1 db2inst1 db2iadm1 4202496 Apr  6 05:50 S0000001.LOG
-rw-r-----  1 db2inst1 db2iadm1 4202496 Apr  6 05:50 S0000002.LOG
-rw-r-----  1 db2inst1 db2iadm1 4202496 Apr  6 05:50 S0000003.LOG
-rw-r-----  1 db2inst1 db2iadm1 4202496 Apr  6 05:50 S0000004.LOG
-rw-r-----  1 db2inst1 db2iadm1 4202496 Apr  6 05:50 S0000005.LOG
-rw-r-----  1 db2inst1 db2iadm1 4202496 Apr  6 05:50 S0000006.LOG
-rw-r-----  1 db2inst1 db2iadm1 4202496 Apr  6 05:50 S0000007.LOG
-rw-r-----  1 db2inst1 db2iadm1 4202496 Apr  6 05:50 S0000008.LOG
-rw-r-----  1 db2inst1 db2iadm1 4202496 Apr  6 05:50 S0000009.LOG

[db2inst1@xifenfei ~]$ ll /home/db2inst1/xff/redolog/NODE0000
total 32868
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  6 05:50 S0000005.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  6 05:50 S0000006.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  6 05:50 S0000007.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  6 05:50 S0000008.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  6 05:50 S0000009.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  6 05:50 S0000010.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  6 05:50 S0000011.LOG
-rw-------  1 db2inst1 db2iadm1 4202496 Apr  6 05:50 S0000012.LOG
-rw-------  1 db2inst1 db2iadm1     512 Apr  6 05:33 SQLLPATH.TAG

1.模拟带有identity表

[db2inst1@xifenfei ~]$ db2 "create table t_xff(xid smallint not null generated always as identity 
> (start with 1,increment by 1),x_name varchar(200)) in ts_xifenfei"
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ db2 "insert into t_xff(x_name) values('www.orasos.com')"
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ db2 "insert into t_xff(x_name) values('XIFENFEI')"
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ db2 "insert into t_xff(x_name) values('xifenfei')"
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ db2 "select * from t_ff"
SQL0204N  "DB2INST1.T_FF" is an undefined name.  SQLSTATE=42704
[db2inst1@xifenfei ~]$ db2 "select * from t_xff"

XID    X_NAME           
------ -------------
     1 www.orasos.com 
     2 XIFENFEI         
     3 xifenfei         

  3 record(s) selected.

2.导出表结构

[db2inst1@xifenfei ~]$ mkdir move_s
[db2inst1@xifenfei ~]$ cd move_s/
[db2inst1@xifenfei move_s]$ db2look -d sample -e -l -o db2_sample.ddl
-- No userid was specified, db2look tries to use Environment variable USER
-- USER is: DB2INST1
-- Creating DDL for table(s)
-- Output is sent to file: db2_sample.ddl

3.导出数据

[db2inst1@xifenfei move_s]$ db2move sample export

Application code page not determined, using ANSI codepage 1208

*****  DB2MOVE  *****

Action:  EXPORT

Start time:  Thu Apr  5 20:21:28 2012


Connecting to database SAMPLE ... successful!  Server : DB2 Common Server V9.5.9

Binding package automatically ... /home/db2inst1/sqllib/bnd/db2common.bnd ... successful!

Binding package automatically ... /home/db2inst1/sqllib/bnd/db2move.bnd ... successful!

EXPORT:     18 rows from table "DB2INST1"."ACT"
EXPORT:      5 rows from table "DB2INST1"."CL_SCHED"
EXPORT:     14 rows from table "DB2INST1"."DEPARTMENT"
EXPORT:     42 rows from table "DB2INST1"."EMPLOYEE"
EXPORT:  10000 rows from table "DB2INST1"."EMPMDC"
EXPORT:     73 rows from table "DB2INST1"."EMPPROJACT"
EXPORT:      8 rows from table "DB2INST1"."EMP_PHOTO"
EXPORT:      8 rows from table "DB2INST1"."EMP_RESUME"
EXPORT:    145 rows from table "SYSTOOLS"."HMON_ATM_INFO"
EXPORT:      0 rows from table "SYSTOOLS"."HMON_COLLECTION"
EXPORT:      3 rows from table "DB2INST1"."IN_TRAY"
EXPORT:      8 rows from table "DB2INST1"."ORG"
EXPORT:      5 rows from table "SYSTOOLS"."POLICY"
EXPORT:     65 rows from table "DB2INST1"."PROJACT"
EXPORT:     20 rows from table "DB2INST1"."PROJECT"
EXPORT:     41 rows from table "DB2INST1"."SALES"
EXPORT:     35 rows from table "DB2INST1"."STAFF"
EXPORT:     35 rows from table "DB2INST1"."STAFFG"
EXPORT:      3 rows from table "DB2INST1"."T_XFF"

Disconnecting from database ... successful!

End time:  Thu Apr  5 20:21:32 2012

4.目标端创建数据库

C:\Windows\system32>db2 "create db db_XFF pagesize 8 k"
DB20000I  CREATE DATABASE命令成功完成。

5.目标端创建对象

C:\Windows\system32>DB2 -tvf D:\move_s\db2_sample.ddl -l d:\xifenfei.log

--检查xifenfei.log文件,发现错误,手工修复

6.导入数据文件

D:\move_s>db2move db_xff load

*****  DB2MOVE  *****

Action:  LOAD

Start time:  Sun Apr 15 23:00:17 2012


Connecting to database DB_XFF ... successful!  Server : DB2 Common Server V9.5.0

Binding package automatically ... E:\DB2\9.5\SQLLIB\BND\DB2COMMON.BND ... successful!

Binding package automatically ... E:\DB2\9.5\SQLLIB\BND\DB2MOVE.BND ... successful!

* LOAD:  table "DB2INST1"."ACT"                
  -Rows read:         18
  -Loaded:            18
  -Rejected:           0
  -Deleted:            0
  -Committed:         18

* LOAD:  table "DB2INST1"."CL_SCHED"           
  -Rows read:          5
  -Loaded:             5
  -Rejected:           0
  -Deleted:            0
  -Committed:          5

--中间很多记录省略

--发现identity表导入失败，需要手工处理
* LOAD:  table "DB2INST1"."T_XFF"              
***  WARNING 3107.  Check message file tab19.msg!
***  SQL Warning!  SQLCODE is  3107
***  SQL3107W  消息文件中至少有一条警告消息。


  -Rows read:          3
  -Loaded:             0
  -Rejected:           3
  -Deleted:            0
  -Committed:          3


Disconnecting from database ... successful!

End time:  Sun Apr 15 23:00:26 2012

7.重新导入identity表

D:\move_s>db2 connect to db_xff

   数据库连接信息

 数据库服务器         = DB2/NT 9.5.0
 SQL 授权标识         = XIFENFEI
 本地数据库别名       = DB_XFF
D:\move_s>DB2 "load from tab19.ixf of ixf modified by identityoverride insert into db2inst1.t_xff"
SQL3501W  由于禁用数据库正向恢复，因此表所驻留的表空间将不被置于备份暂挂状态。

SQL3551W  表至少包含实用程序将覆盖的一个 GENERATED ALWAYS 列。

SQL3109N  实用程序正在开始从文件 "D:\move_s\tab19.ixf" 装入数据。

SQL3500W  在时间 "2012-04-15 23:06:52.393775"，实用程序在开始 "LOAD"。

SQL3150N  PC/IXF 文件中的 H 记录具有产品 "DB2    02.00"，日期 "20120405"和时间 "202132"。

SQL3153N  PC/IXF 文件中的 T 记录具有名称 "tab19.ixf"，限定符 "" 和源 ""。

SQL3519W  开始装入一致点。输入记录数 = "0"。

SQL3520W  “装入一致点”成功。

SQL3110N  实用程序已完成处理。从输入文件读了 "3" 行。

SQL3519W  开始装入一致点。输入记录数 = "3"。

SQL3520W  “装入一致点”成功。

SQL3515W  在时间 "2012-04-15 23:06:52.451619"，实用程序已经完成了 "LOAD"。


读取行数         = 3
跳过行数         = 0
装入行数         = 3
拒绝行数         = 0
删除行数         = 0
落实行数         = 3

D:\move_s>db2 "select * from db2inst1.t_xff"

XID    X_NAME


------ ------------------------------
     1 www.orasos.com
     2 XIFENFEI
     3 xifenfei

  3 条记录已选择。

一.load原理性知识
1.为什么要使用LOAD
load不需要写日志(或很少日志),不做检查约束和参照完整性约束,不触发Trigger,锁的时间比较短,因此特别适合大数据量的导入.

2.load过程分为4个阶段
load/build/delete/index copy.
load阶段是将源文件parser成物理数据存储的格式,直接装入到页中,而不通过db2引擎,load阶段会检查表定义,违背定义的数据不会装入到表中.
build阶段建议索引（如果装入表有索引的话）,会检查唯一性约束,违背了唯一性的数据会在delete阶段删除.
index copy阶段将index数据从指定的临时表空间拷贝到初始的表空间里.
index copy只适应于allow read access场景.load的4个阶段会记录在messages文件里.

3.load的offline和online
缺省情况下,load过程不允许其他应用访问表,即allow no access,或叫offline load（离线加载）.Allow read access,或叫online load(在线加载）,只有在load …insert into的时候才允许使用,其他应用读到的数据是加载前的数据,load … replace into会将数据先删除,再load,只能是离线加载.

4.load表的状态
load可能出现的几种状态,某一时刻可能会同时处于几种状态.只有当表是normal状态时,表才能进行正常的增删改查操作.
normal: 正常状态
set integrity pending: 如果目标表有check约束或reference约束,那么Load后此表处于set integrity pending,表明表有约束还未检查,稍后解释.
load in progress:load正在数据加载过程中.
load pending:数据提交前出现了故障,需要通过load..terminate,load..replace或load..restart解除暂挂状态
read access only:目标表数据是可以读的,当load时指定了allow read access,那表就会处于read access only状态
unavailable:表可能被删除了或从backup中恢复了.
unknown:通过load..query命令无法得知表的状态.

二.load试验测试
需要导入数据

[db2inst2@xifenfei ~]$ more /tmp/xifenfei.data 
10,"MANAGE","MANAGE/ADVISE"
20,"ECOST ","ESTIMATE COST"
30,,"DEFINE SPECS"
40,"LEADPR","LEAD PROGRAM/DESIGN"
50,"SPECS ",
60,"LOGIC ","DESCRIBE LOGIC"
70,"CODE  ","CODE PROGRAMS"
80,"TEST  ","TEST PROGRAMS"
90,"ADMQS ","ADM QUERY SYSTEM"
100,"TEACH ","TEACH CLASSES"
110,"COURSE","DEVELOP COURSES"
60,"STAFF ","PERS AND STAFFING"
130,"OPERAT","OPER COMPUTER SYS"
140,"MAINT ","MAINT SOFTWARE SYS"
150,"ADMSYS","ADM OPERATING SYS"
160,"ADMDB ","ADM DATA BASES"
170,"ADMDC ","ADM DATA COMM"
80,"DOC   ","DOCUMENT"

一共18条记录

创建目标表

[db2inst2@xifenfei ~]$ db2 "CREATE TABLE XIFENFEI_LOAD(ACTNO SMALLINT NOT NULL primary key,
> ACTKWD CHAR(6) NOT NULL,ACTDESC VARCHAR(20) NOT NULL)"
DB20000I  The SQL command completed successfully.
[db2inst2@xifenfei ~]$ db2 list tables

Table/View                      Schema          Type  Creation time             
------------------------------- --------------- ----- --------------------------
XIFENFEI_LOAD                   DB2INST2        T     2012-04-05-18.53.42.296503

  1 record(s) selected.

[db2inst2@xifenfei ~]$ db2 describe table xifenfei_load

                                Data type                     Column
Column name                     schema    Data type name      Length     Scale Nulls
------------------------------- --------- ------------------- ---------- ----- ------
ACTNO                           SYSIBM    SMALLINT                     2     0 No    
ACTKWD                          SYSIBM    CHARACTER                    6     0 No    
ACTDESC                         SYSIBM    VARCHAR                     20     0 No    

  3 record(s) selected.

创建异常表

[db2inst2@xifenfei ~]$ db2 "create table xifenfei_exp like xifenfei_load"
DB20000I  The SQL command completed successfully.

[db2inst2@xifenfei ~]$ db2 "alter table xifenfei_exp add column ts timestamp
> add column msg clob(32k)"
DB20000I  The SQL command completed successfully.
[db2inst2@xifenfei ~]$ db2 describe table xifenfei_exp

                                Data type                     Column
Column name                     schema    Data type name      Length     Scale Nulls
------------------------------- --------- ------------------- ---------- ----- ------
ACTNO                           SYSIBM    SMALLINT                     2     0 No    
ACTKWD                          SYSIBM    CHARACTER                    6     0 No    
ACTDESC                         SYSIBM    VARCHAR                     20     0 No    
TS                              SYSIBM    TIMESTAMP                   10     0 Yes   
MSG                             SYSIBM    CLOB                     32768     0 Yes   

  5 record(s) selected.

load导入数据

[db2inst2@xifenfei ~]$ db2 "load from /tmp/xifenfei.data of del modified by dumpfile=/tmp/xifenfei.dmp
messages xifenfei.msg insert into xifenfei_load for exception xifenfei_exp"

Number of rows read         = 18
Number of rows skipped      = 0
Number of rows loaded       = 16
Number of rows rejected     = 2
Number of rows deleted      = 2
Number of rows committed    = 18

SQL3107W  There is at least one warning message in the message file.

提示一共18条记录,成功了14条,拒绝2条,删除2条

查看表中记录

[db2inst2@xifenfei ~]$ db2 "select * from xifenfei_load"

ACTNO  ACTKWD ACTDESC             
------ ------ --------------------
    10 MANAGE MANAGE/ADVISE       
    20 ECOST  ESTIMATE COST       
    40 LEADPR LEAD PROGRAM/DESIGN 
    60 LOGIC  DESCRIBE LOGIC      
    70 CODE   CODE PROGRAMS       
    80 TEST   TEST PROGRAMS       
    90 ADMQS  ADM QUERY SYSTEM    
   100 TEACH  TEACH CLASSES       
   110 COURSE DEVELOP COURSES     
   130 OPERAT OPER COMPUTER SYS   
   140 MAINT  MAINT SOFTWARE SYS  
   150 ADMSYS ADM OPERATING SYS   
   160 ADMDB  ADM DATA BASES      
   170 ADMDC  ADM DATA COMM       

  14 record(s) selected.

果真14条记录,和文件相比缺少4条记录

查看dump file

[db2inst2@xifenfei ~]$ more /tmp/xienfei.dmp.load.000 
30,,"DEFINE SPECS"
50,"SPECS ",

发现两条违背表定义记录,导入过程中,直接被拒绝的两条

查看异常表

[db2inst2@xifenfei ~]$ db2 "select * from xifenfei_exp"

ACTNO  ACTKWD ACTDESC              TS                         MSG  
------ ------ --------------------  
    60 STAFF  PERS AND STAFFING    2012-04-05-19.02.19.984440 00001I0000500001 
    80 DOC    DOCUMENT             2012-04-05-19.02.19.984440 00001I0000500001

发现两条违背唯一性约束记录,构建index的过程中删除