RAC环境新建lv务必注意两个节点权限同步
AIX5.3 ORACLE10G RAC环境，新建LV时由于CHMOD、CHOWN未在两个节点同步，导致未设置权限的节点报ORA-01186\ORA-01157\ORA-01110错
AIX5.3 Oracle10G RAC环境，新建LV时由于CHMOD、CHOWN未在两个节点同步，导致未设置权限的节点报ORA-01186\ORA-01157\ORA-01110错误，后对数据文件紧急下线过程中又出现数据文件问题，最后通过Media recovery恢复。该案例告诉我们务必注意两个节点权限的同步，即使不同步也不要轻易OFFLINE，可尝试重启之前未同步的节点。
--实际步骤--
新建data36_disk数据文件
通过smit lv
PP SIZE: 256 megabyte(s)
PPs: 10
--权限设置
chown oracle:dba /dev/data36_disk
chown oracle:dba /dev/rdata11_disk
chmod 777 /dev/data36_disk
chmod 777 /dev/rdata11_disk
致命的问题就出在这一步，因为只在RAC的其中一个节点进行了操作，，另外一个节点的权限仍然有问题，
虽然下面的add datafile没有报错，但是另外一个节点的日志出现了错误提示：
--向数据库表空间添加数据文件
# su - oracle
[YOU HAVE NEW MAIL]
$ sqlplus / as sysdba
SQL*Plus: Release 10.2.0.4.0 - Production on Sat Feb 12 21:26:42 2011
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, Real Application Clusters, OLAP, Data Mining
and Real Application Testing options
SQL> alter tablespace produc_DATA add datafile '/dev/rdata11_disk' size 2500M;
Tablespace altered.
--这个时候RAC2节点出现ERROR
Sat Feb 12 21:33:00 2011
Errors in file /home/oracle/admin/produc/bdump/produc2_dbw0_803734.trc:
ORA-01186: file 45 failed verification tests
ORA-01157: cannot identify/lock data file 45 - see DBWR trace file
ORA-01110: data file 45: '/dev/rdata11_disk'
File 45 not verified due to error ORA-01157
--修改节点2的相关文件权限
chown oracle:dba /dev/data36_disk
chown oracle:dba /dev/rdata11_disk
chmod 777 /dev/data36_disk
chmod 777 /dev/rdata11_disk
--问题依旧，于是紧急下线
SQL> alter database datafile '/dev/rdata11_disk' offline;
Database altered.
--修改完成，再次上线时出现ORA-01113错误
SQL> alter database datafile '/dev/rdata11_disk' online;
alter database datafile '/dev/rdata11_disk' online
*
ERROR at line 1:
ORA-01113: file 48 needs media recovery
ORA-01110: data file 48: '/dev/rdata11_disk'
--根据上述提示进行recover操作
SQL> recover datafile recover datafile '/dev/data36_disk';
ORA-00279: change 2986334634 generated at 02/12/2011 21:40:35 needed for thread1
ORA-00289: suggestion : /home/oracle/archlog/produc1/1_25181_614088933.arc
ORA-00280: change 2986334634 for thread 1 is in sequence #25181
Specify log: {
ORA-00279: change 2986334634 generated at 02/12/2011 19:35:48 needed for thread2
ORA-00289: suggestion : /home/oracle/archlog/produc1/2_17592_614088933.arc
ORA-00280: change 2986334634 for thread 2 is in sequence #17592
Specify log: {
ORA-00308: cannot open archived log '/home/oracle/archlog/produc1/2_17592_614088933.arc'
ORA-27037: unable to obtain file status
IBM AIX RISC System/6000 Error: 2: No such file or directory
Additional information: 3
--上面提示cannot open archived log '/home/oracle/archlog/produc1/2_17592_614088933.arc'
--怀疑文件丢失，进入相关目录确认
SQL> exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, Real Application Clusters, OLAP, Data Mining
and Real Application Testing options
$ cd /home/oracle/archlog/produc1/
$ ls -lt|grep 2_17592_614088933
--确认没有文件