nbu備份db2數據庫6號錯誤解決案例

  NBU在備份一臺AIX服務器上的DB2數據庫時，報6號錯誤。

  報錯截圖:

在AIX服務器上運行備份腳本，具體報錯信息以下：

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".

1、分析檢查

一、檢查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.  

二、分析共享庫的載入

# 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命令可顯示所依賴的動態鏈接庫的儘量的詳細信息

根據提示去檢查列出的文件是否都存在，若是不存在能夠從其餘正常可備份的機器上拷貝。

三、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                */

根據提示，可推斷沒有找到相關文件或路徑不正確

四、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.

根據以上的分析，可確知歸檔目錄讀取不正確

五、檢查當前數據庫是否開啓歸檔

$ 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

發現設置了歸檔，但歸檔目錄沒指定

2、解決問題

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

運行後結果以下：

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/

這個參數修改後，須要重啓數據庫才能生效。

重啓後，發現問題已解決，能夠從新正常備份了。

另外若是你是在作數據庫恢復時，遇到這樣的問題

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".

能夠在恢復腳本上增長如下參數便可：

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

補充：

SQL2071N  An error occurred while accessing the shared library

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

這個問題的另一種緣由就是你的服務器若是裝的是32位的NBU客戶端，則不能使用nbdb2.sl64這個文件，而應該在腳本中指明使用nbdb2.sl這個32位的文件。這個問題跟你的服務器是64位的無關。

（# 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）