Oracle AutomaticStorage Management Cluster File System (Oracle ACFS) is a multi-platform,scalable file system, and storage management technology that extends OracleAutomatic Storage Management (Oracle ASM) functionality to support customerfiles maintained outside of Oracle Database. Oracle ACFS supports many databaseand application files, including executables,database trace files, databasealert logs, application reports, BFILEs, and configuration files. Othersupported files are video, audio, text, images, engineering drawings, and othergeneral-purpose application file data.
下面来介绍下Oracle 11gR2 RAC环境下ACFS的使用，当前系统环境操作系统版本为OEL6.5，数据库版本为Oracle 11.2.0.4。
1. 查看ACFS相关的服务
查看acfs/advm驱动是否加载
查看集群资源
使用acfsload加载驱动
ACFS-9459:ADVM/ACFS is not supported on this OS version: '3.8.13-16.2.1.el6uek.x86_64'
从报错信息中可以看出，OEL6.5操作系统11204数据库并未被支持。升级数据库版本，打补丁11204.7后驱动可以被加载，但不能被系统自动加载。处理如下:
#!/bin/sh
# chkconfig: 234530 21
# description: LoadOracle ASM volume driver on system startup
ORACLE_HOME=/u01/app/11.2.0/grid
export ORACLE_HOME
$ORACLE_HOME/bin/acfsloadstart -s
acfsload 0:off 1:off 2:on 3:on 4:on 5:on 6:off
oracleacfs 877320 0
oracleadvm 221760 0
oracleoks 276880 2 oracleacfs,oracleadvm
oracleacfs 877192 0
oracleadvm 221504 0
oracleoks 277008 2 oracleacfs,oracleadvm
添加资源ora.registry.acfs
查看是否添加成功
NAME=ora.registry.acfs
TYPE=ora.registry.acfs.type
NAME=ora.registry.acfs
TYPE=ora.registry.acfs.type
查看添加的资源状态。
---------------------------------------------------------------------
NAME TARGET STATE SERVER STATE_DETAILS
Local Resources
---------------------------------------------------------------------
ora.ARCH.dg
ora.CRS.dg
ora.DATA.dg
ora.LISTENER.lsnr
ora.asm
ora.gsd
ora.net1.network
ora.ons
ora.registry.acfs
Cluster Resources
---------------------------------------------------------------------
ora.LISTENER_SCAN1.lsnr
ora.cvu
ora.oc4j
ora.scan1.vip
添加的ora.registry.acfs资源默认offline，需手工启动。
启动后查看状态如下，已为online状态。
---------------------------------------------------------------------
NAME TARGET STATE SERVER STATE_DETAILS
---------------------------------------------------------------------
Local Resources
ora.ARCH.dg
ora.CRS.dg
ora.DATA.dg
ora.LISTENER.lsnr
ora.asm
ora.gsd
ora.net1.network
ora.ons
ora.registry.acfs
---------------------------------------------------------------------ClusterResources
---------------------------------------------------------------------
ora.LISTENER_SCAN1.lsnr
ora.cvu
ora.oc4j
ora.scan1.vip
2. 使用ASMCMD命令创建ACFS
（1）、使用volcreate命令创建vol01，大小为30G;
ASMCMD>volcreate -G data -s 30G testvol
（2）、使用volinfo查看vol01的相关信息
ASMCMD> volinfo-G data testvol
Diskgroup Name:DATA
Volume Name: TESTVOL
Volume Device: /dev/asm/testvol-347
State: ENABLED
Size (MB): 30720
Resize Unit (MB): 32
Redundancy: UNPROT
Stripe Columns: 4
Stripe Width (K): 128
Usage:
Mountpath:
ASMCMD>
（2）、使用操作系统命令查看设备名，这里的/dev/asm/ testvol-347相当于裸设备。
total 0
brwxrwx--- 1 rootasmadmin 251, 177665 Oct 28 13:20 testvol-347
（3）、在v$asm_volume视图中使用sql查看volume相关信息
SQL*Plus: Release11.2.0.4.0 Production on Fri Oct 28 13:22:33 2016
Copyright (c) 1982,2013, Oracle. All rights reserved.
Connected to:
Oracle Database 11gEnterprise Edition Release 11.2.0.4.0 - 64bit Production
With the RealApplication Clusters and Automatic Storage Management options
SQL> selectvolume_name,volume_device,size_mb from v$asm_volume;
VOLUME_NAME VOLUME_DEVICE SIZE_MB
---------------------------------------------------------
TESTVOL /dev/asm/testvol-347 30720
SQL>
（4）、格式化卷，创建文件系统
mkfs.acfs:version = 11.2.0.4.0
mkfs.acfs: on-diskversion = 39.0
mkfs.acfs:volume =/dev/asm/testvol-347
mkfs.acfs: volumesize = 32212254720
mkfs.acfs: Formatcomplete.
（5）、注册ACFS文件系统，相当于定义挂载点，仅在节点1注册一次即可
acfsutil registry:mount point /u01/app/grid/acfsmounts/data_testvol successfully added to OracleRegistry
查看文件系统信息
/u01/app/grid/acfsmounts/data_testvol
ACFS Version: 11.2.0.4.0
flags: MountPoint,Available
mount time: Fri Oct 28 13:37:27 2016
volumes: 1
total size: 32212254720
total free: 32068386816
primary volume: /dev/asm/testvol-347
label:
flags: Primary,Available,ADVM
on-disk version: 39.0
allocation unit: 4096
major, minor: 251, 177665
size: 32212254720
free: 32068386816
ADVM diskgroup DATA
ADVM resize increment: 33554432
ADVM redundancy: unprotected
ADVM stripe columns: 4
ADVM stripe width: 131072
number of snapshots: 0
snapshot space usage: 0
replication status: DISABLED
（6）、注册成功后自动挂载文件系统，两节点查看如下：
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root 532G 34G 476G 7% /
tmpfs 16G 255M 16G 2% /dev/shm
/dev/sda1 477M 55M 397M 13% /boot
/dev/asm/testvol-347 30G 138M 30G 1% /u01/app/grid/acfsmounts/data_testvol
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root 533G 24G 487G 5% /
tmpfs 16G 254M 16G 2% /dev/shm
/dev/sda1 477M 55M 397M 13% /boot
/dev/asm/testvol-347 30G 138M 30G 1%/u01/app/grid/acfsmounts/data_testvol
图形界面查看状态如下
