Backup failed due to TSM error 106

AIX Server，实例：db2inst2 ,数据库：CPW。部署脚本，每天做online backup use tsm。

客户发现备份失败。

检查report发现SQL2033 错误。

*------------------------------------------------------------------*
 Starting database backup               Sun Dec 25 04:01:01 CUT 2011
*------------------------------------------------------------------*

 Start timestamp of backup is Sun Dec 25 04:01:01 CUT 2011

 Issuing this command: db2 backup database CPW  online use tsm open 2 sessions without prompting

*------------------------------------------------------------------*

 SQL Return code = -2033
 Backup of database CPW failed

运行db2 backup db cpw use tsm检查错误码：sql2033,tsm error code 106

查看Sql2033的解释：

db2inst2@b03cxnp01049:/home/db2inst2> db2 ? sql2033


SQL2033N  An error occurred while accessing TSM during the processing of
      a database utility. TSM reason code: "<reason-code>".

Explanation:

Some common TSM reason codes are:

106

         The specified file is being used by another process. You tried
         to read from or write to a file that is currently being used by
         another process.
User response:

Responses for common TSM problems are:

106

         Ensure that you specified the correct file or directory name,
         correct the permissions, or specify a new location.

检查为TSM设置的环境变量：

db2inst2@b03cxnp01049:/home/db2inst2> env |grep -i dsm
DSMI_CONFIG=/usr/tivoli/tsm/client/api/bin64/dsm.opt
DSM_LOG=/u/db2inst2
DSMI_LOG=/u/db2inst2
DSMI_DIR=/usr/tivoli/tsm/client/api/bin64

需要写权限的应该只有LOG，检查LOG的权限：

db2inst2@b03cxnp01049:/home/db2inst2> ls -ld /u/db2inst2
drwxr-xr-x    8 db2inst2 staff          4096 Jan 20 04:55 /u/db2inst2

权限没发现问题，还是不放心，touch一个文件，并且cat些text以确定可以写入：

db2inst2@b03cxnp01049:/home/db2inst2> touch /u/db2inst2/test
db2inst2@b03cxnp01049:/home/db2inst2> cat > /u/db2inst2/test
test
db2inst2@b03cxnp01049:/home/db2inst2> ls -l /u/db2inst2/test
-rw-------    1 db2inst2 db2iadm2          5 Jan 20 07:31 /u/db2inst2/test
db2inst2@b03cxnp01049:/home/db2inst2> cat /u/db2inst2/test
test

确定LOG dir权限没问题，那么是哪个文件出问题了呢，想到TSM错误日志在dsm.sys里面指定，检查：

db2inst2@b03cxnp01049:/usr/tivoli/tsm/client/api/bin64> grep ERROR /usr/tivoli/tsm/client/api/bin64/dsm.sys
ERRORLOGRETENTION       7,d
ERRORLOGNAME            /home/inst1/dsierror.log
db2inst2@b03cxnp01049:/usr/tivoli/tsm/client/api/bin64> ls -l /home/inst1/dsierror.log
-rw-r--r--    1 inst1    sysadm1           0 Jul 18 2010  /home/inst1/dsierror.log

显然，db2inst2没有写/home/inst1/dsierror.log的权限。
切换到user inst1，修改/home/inst1/dsierror.log的权限，允许db2inst2写入：

inst1@b03cxnp01049:/home/inst1> chmod 777 /home/inst1/dsierror.log
inst1@b03cxnp01049:/home/inst1> ls -l /home/inst1/dsierror.log
-rwxrwxrwx    1 inst1    sysadm1           0 Jul 18 2010  /home/inst1/dsierror.log

运行备份脚本测试：

Starting online backup
Issuing this DB2 command:  backup db CPW online   use tsm
backup db CPW online use tsm

Backup successful. The timestamp for this backup image is : 20120120045654