Oracle資料備份過程中遇BUG_ORA-27054 NFS file system

【Oracle故障】ORA-27054 NFS file system where the file is created or resides is not mounted with correct options
 
在資料備份過程中，由於目標是使用NFS檔案系統，因此在匯入的時候遇到了BUG，報錯如下：
 
ORA-39001: invalid argument value
ORA-39000: bad dump file specification
ORA-31641: unable to create dump file "/exp/bak/expdp_01.dmp"
ORA-27054: NFS file system where the file is created or resides is not mounted with correct options
Additional information: 6
 
通過查詢metalink id :387700.1
 
文檔上說可能的問題有以下幾種：
a) The mount table (eg; /etc/mnttab) can be read to check the mount options
b) The NFS mount is mounted with the "hard" option
c) The mount options include rsize>=32768 and wsize>=32768
d) For RAC environments, where NFS disks are supported, the "noac" mount option is used.
 
文檔上指出通過設定event 10298事件可以避免，不過設定event 10298需要重啟資料庫生效，目前為生產環境，這方法不能用。
 
通過調整上述的參數，hard，rsize，wsize都不能解決。
 
最後檢查NFS的配置，發現用戶端的/etc/filesystems中未加入mount nfs檔案系統的條目
 
增加以下條目後，重新mount，解決。
 
#vi /etc/filesystems
/exp:
        dev             = /exp
        vfs             = nfs
        nodename        = 192.168.1.20
        mount           = true
        options         = rw,bg,hard,intr,proto=tcp,vers=3,rsize=65536,wsize=65536,timeo=600
        account         = false
 
#umount /oraexp
#mount /oraexp
 
建議大家以後遇到類似問題，先檢查/etc/filesystems檔案，這個問題都是由於大家都喜歡使用以下方式mount nfs導致。
 
mount -o rw,bg,hard,intr,proto=tcp,vers=3,rsize=65536,wsize=65536,timeo=600 192.168.1.20:/exp /exp
 
//相關metalink 文檔如下：
 
ORA-19504 ORA-27054 Errors mounting NFS file system [ID 370513.1]
RMAN Backup Fails With RMAN-03009 ORA-19504 ORA-27054 NFS file system where the file is created or resides is not mounted with correct options [ID 1472448.1]
ORA-27054: NFS file system where the file is created or resides is not mounted with correct options [ID 781349.1]
 
//另外設定10298的過程如下：
 
1) set the Event 10298 in the init file
event="10298 trace name context forever, level 32"
if you are using the spfile then the following can be done
 
SQL> alter system set event='10298 trace name context forever, level 32'scope= spfile ;
 
Once you set the above parameter restart the instance check as follows
 
SQL> select name, value from v$parameter where name = 'event';
 
NAME VALUE
---------- ------------------------------------------------------------
Event 10298 trace name context forever, level 32
 
1 row selected.

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