NFS SERVER 10.10.10.22
NFS CLIENT 10.10.10.12

1、nfs server需要启动的服务：

#service portmap start
Starting portmap: [ OK ]
#service nfs start
Starting NFS services: [ OK ]
Starting NFS quotas: [ OK ]
Starting NFS daemon: [ OK ]
Starting NFS mountd: [ OK ]
Starting RPC idmapd: [ OK ]

2、nfs client需要启动的服务

#service portmap start
Starting portmap: [ OK ]

3、在NFS SERVICE端配置NFS

root用户编辑文件/etc/exports内容如下：

/u01/nfs 10.10.10.12(rw,no_root_squash,insecure)

检查配置结果：
[root@db11g-em10g nfs]# exportfs
/u01/nfs 10.10.10.12
[root@db11g-em10g nfs]# exportfs -rv
exporting 10.10.10.12:/u01/nfs

4、在NFS Client端root用户挂载NFS文件系统
[root@db11g oracle]# mount 10.10.10.22:/u01/nfs /oracle/nfs

5、配置NFS CLIENT数据库支持Direct NFS

oracle用户编辑$ORACLE_HOME/dbs/oranfstab文件，内容如下
[oracle@db11g ~]$ cat $ORACLE_HOME/dbs/oranfstab
server:db11g-em10g
path:10.10.10.22
export:/u01/nfs mount:/oracle/nfs

修改libodm11.so库文件的链接对象
$cd $ORACLE_HOME/lib
$mv libodm11.so libodm11.so.bak
$ln -s libnfsodm11.so libodm11.so

数据库启动的告警日志中有如下信息：

Oracle instance running with ODM: Oracle Direct NFS ODM Library Version 2.0

6、在NFS Client端创建表空间测试：

SQL> select * from v$dnfs_servers

ID SVRNAME DIRNAME MNTPORT NFSPORT WTMAX RTMAX
---------- --------------- -------------------- ---------- ---------- ---------- ----------
6 db11g-em10g /u01/nfs 718 2049 0 0

SQL> create tablespace dnfs datafile '/oracle/nfs/dnfs01.dbf' size 2M;
SQL> select * from v$dnfs_files

FILENAME FILESIZE PNUM SVR_ID
---------------------------------------- ---------- ---------- ----------
/oracle/nfs/dnfs01.dbf 2105344 9 5

7、检查NFS SERVER端口的链接情况：
[root@db11g-em10g nfs]# netstat -an |grep 2049
tcp 0 0 0.0.0.0:2049 0.0.0.0:* LISTEN
tcp 0 0 10.10.10.22:2049 10.10.10.12:23052 ESTABLISHED
tcp 0 0 10.10.10.22:2049 10.10.10.12:728 ESTABLISHED
tcp 0 0 10.10.10.22:2049 10.10.10.12:56522 ESTABLISHED
udp 0 0 0.0.0.0:2049 0.0.0.0:*

发现的问题：
1、NFS CLient端必须要启动portmap服务，否者在client端mount nfs文件出错：
[root@db11g oracle]# mount 10.10.10.22:/u01/nfs /oracle/nfs
mount.nfs: Input/output error
[root@db11g oracle]# service portmap start
Starting portmap: [ OK ]
[root@db11g oracle]# mount 10.10.10.22:/u01/nfs /oracle/nfs

2、NFS SERVER端的配置文件/etc/exports使用默认的内容：
[root@db11g-em10g nfs]# cat /etc/exports
/u01/nfs 10.10.10.12(rw,sync,no_root_squash)
那么在Client端创建表空间时候出现如下的错误：
[oracle@db11g dbs]$ sqlplus / as sysdba

SQL*Plus: Release 11.1.0.7.0 - Production on Sat Dec 22 15:33:19 2012

Copyright (c) 1982, 2008, Oracle. All rights reserved.

Connected to:
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - Production
With the Partitioning and Real Application Testing options

SQL> create tablespace nfsdemo datafile '/oracle/nfs/nfsdemo01.dbf' size 2M;
create tablespace nfsdemo datafile '/oracle/nfs/nfsdemo01.dbf' size 2M
*
ERROR at line 1:
ORA-01119: error in creating database file '/oracle/nfs/nfsdemo01.dbf'
ORA-27086: unable to lock file - already in use
Linux Error: 37: No locks available
Additional information: 10

告警日志提示如下错误：
Sat Dec 22 15:38:18 2012
ORA-1119 signalled during: create tablespace dnfs datafile '/oracle/nfs/dnfs01.dbf' size 2M...
Sat Dec 22 15:46:52 2012
create tablespace dnfs datafile '/oracle/nfs/dnfs01.dbf' size 2M
Direct NFS: NFS3ERR 1 Not owner. path db11g-em10g mntport 718 nfsport 2049