nbu备份db2数据库6号错误如何处理

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  NBU在备份一台AIX服务器上的DB2数据库时，报6号错误。

  报错截图:

在AIX服务器上运行备份脚本，具体报错信息如下：

Executing: db2 BACKUP DATABASE BJMOA4 ONLINE  LOAD /usr/openv/netbackup/bin/nbdb2.sl64 OPEN 4 SESSIONS BUFFER 1024

SQL2071N  An error occurred while accessing the shared library

"/usr/openv/netbackup/bin/nbdb2.sl64". Reason code: "2".

一、分析检查

1、检查SQL2071N

$ db2 ? SQL2071N

SQL2071N An error occurred while accessing the shared library

         "<shr-lib-name>". Reason code: "<reason-code>"

Explanation:

An unexpected error occurred while accessing a vendor shared

library during the processing of a database utility.  The

following is a list of reason codes:

1 An invalid shared library path was encountered.

2 An attempt to load the backup shared library failed.

3 An error was encountered while unloading the shared library.  

The utility stops processing.

User Response:

Ensure the shared library provided is valid and resubmit the

utility command or use another supported media.  

2、分析共享库的载入

# ldd /usr/openv/netbackup/bin/nbdb2.sl64

/usr/openv/netbackup/bin/nbdb2.sl64 needs:

        /usr/openv/lib/libxbsa64.so

        /usr/openv/lib/libVcvcomb64_noul.so

        /usr/lib/libc.a(shr_64.o)

        /usr/lib/libdl.a(shr_64.o)

        /unix

        /usr/lib/libcrypt.a(shr_64.o)

使用LDD命令可显示所依赖的动态连接库的尽可能的详细信息

根据提示去检查列出的文件是否都存在，如果不存在可以从其他正常可备份的机器上拷贝。

3、分析CODE 2

#cat /usr/include/sys/errno.h

#define EPERM   1       /* Operation not permitted              */

#define ENOENT  2       /* No such file or directory            */

#define ESRCH   3       /* No such process                      */

#define EINTR   4       /* interrupted system call              */

#define EIO     5       /* I/O error                            */

#define ENXIO   6       /* No such device or address            */

#define E2BIG   7       /* Arg list too long                    */

#define ENOEXEC 8       /* Exec format error                    */

#define EBADF   9       /* Bad file descriptor                  */

#define ECHILD  10      /* No child processes                   */

#define EAGAIN  11      /* Resource temporarily unavailable     */

#define ENOMEM  12      /* Not enough space                     */

#define EACCES  13      /* Permission denied                    */

#define EFAULT  14      /* Bad address                          */

#define ENOTBLK 15      /* Block device required                */

根据提示，可推断没有找到相关文件或路径不正确

4、分析DB2diag.log文件

DATA #3 : String, 265 bytes

       0509-022 Cannot load module /usr/openv/netbackup/bin/nbdb2.sl64(shr.o).

       0509-153   File /usr/openv/netbackup/bin/nbdb2.sl64 is not an archive or

                  the file could not be read properly.

FUNCTION: DB2 UDB, database utilities, sqlubcka, probe:140

MESSAGE : Backup Terminated.

根据以上的分析，可确知归档目录读取不正确

5、检查当前数据库是否开启归档

$ db2 get db cfg for bjtt4|grep -i log

Log retain for recovery enabled             (LOGRETAIN) = RECOVERY

User exit for logging enabled                (USEREXIT) = OFF

HADR log write synchronization mode     (HADR_SYNCMODE) = NEARSYNC

First log archive method                 (LOGARCHMETH1) = LOGRETAIN

发现设置了归档，但归档目录没指定

二、解决问题

$db2 update db cfg for bjtt4 using LOGARCHMETH1 "disk:/archive/db2log"

运行后结果如下：

Log retain for recovery enabled             (  LOGRETAIN) = RECOVERY
User exit for logging enabled                (USEREXIT) = OFF  
HADR log write synchronization mode     (HADR_SYNCMODE) = NEARSYNC  
 

First log archive method                 (LOGARCHMETH1) =DISK:/archivelog/db2log/

这个参数修改后，需要重启数据库才能生效。

重启后，发现问题已解决，可以重新正常备份了。

另外如果你是在做数据库恢复时，遇到这样的问题

例如：RESTORE DATABASE EPD FROM /db2 TAKEN AT 20130525112121 TO /db2/EPP INTO EPP NEWLOGPATH /db2/EPP/log_dir/ WITH 2

BUFFERS BUFFER 1024 REDIRECT

SQL2529W  Warning!  Restoring to an existing database that is different from the backup p_w_picpath database, and the alias name "EPP" of the existing database does not match the alias name "EPD" of the backup p_w_picpath, and the database name "EPP" of the existing database does not match the database name "EPD" of the backup p_w_picpath. The target database will be overwritten by the backup version. The Roll-forward recovery logs associated with the target database will be deleted.

Do you want to continue ? (y/n) y

SQL2071N  An error occurred while accessing the shared library

"/db2/EPP/db2EPP/NODE0000/SQL00001/libdb2compr.a". Reason code: "2".

可以在恢复脚本上增加以下参数即可：

COMPRLIB  /db2/db2EPP/sqllib/lib/libdb2compr.a

补充：

SQL2071N  An error occurred while accessing the shared library

"/usr/openv/netbackup/bin/nbdb2.sl64". Reason code: "2".

这个问题的另外一种原因就是你的服务器如果装的是32位的NBU客户端，则不能使用nbdb2.sl64这个文件，而应该在脚本中指明使用nbdb2.sl这个32位的文件。这个问题跟你的服务器是64位的无关。

（# Change MY_LIB to the correct NetBackup library name for your host:

 #       Solaris or Linux 32-bit  = nbdb2.so

 #       Solaris 64-bit           = nbdb2.so64

 #       AIX or HPUX 32-bit       = nbdb2.sl

 #       AIX or HPUX 64-bit       = nbdb2.sl64）

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