AIX mount NFS

vi /etc/filesystems
/backup:
        dev = /backup
        vfs = nfs
        nodename = 192.168.1.126
        mount = true
        options = bg,rw,noac,nointr,hard,rsize=32768,wsize=32768,timeo=600,vers=3,proto=tcp,sec=sys
        account = false

umount -f /backup		
mount /backup

mount -o bg,rw,noac,nointr,hard,rsize=32768,wsize=32768,timeo=600,vers=3,proto=tcp,sec=sys 192.168.1.126:/backup /backup

•使用默认选项（即ac，attribute caching）时，NFS客户端写性能约为300MBps；
•只要选项包含noac的话，搭建的NFS客户端写文件性能不超过30MBps；仅为正常情况的十分之一左右；
−#mount -o rw,bg,hard,nointr,rsize=32768,wsize=32768,proto=tcp,vers=3,timeo=600,noac nfstest:/projects /mnt
•使用客户采用的其他选项，仅去掉noac，NFS客户端写性能也能达到~300MBps；
−mount -o rw,bg,hard,nointr,rsize=32768,wsize=32768,proto=tcp,vers=3,timeo=600 nfstest:/projects /mnt

Mount Options for Oracle files for RAC databases and Clusterware when used with NFS on NAS devices (Doc ID 359515.1)

* NFS mount option “forcedirectio” is required on Solaris platforms when mounting the OCR/CRS files when using Oracle 10.1.0.4 or 10.2.0.2 or later (Oracle unpublished bug 4466428)
** AIX is only supported with NAS on AIX 5.3 TL04 and higher with Oracle 10.2.0.1 and later
*** NAS devices are only supported with HPUX 11.23 or higher ONLY 

# These mount options are for Linux kernels 2.6 and above. For older kernels please check Note 279393.1

## The stated mount options for binaries are applicable only if the ORACLE HOME is shared.