其实使用asmca图形创建ACFS文件系统既简单又不容易出错，但是考虑到某些客户场景不允许我们调取图形，所以本文演示下通过命令行创建ACFS文件系统的步骤。
可以通过MOS搜索到下面这篇文档：
- ASM/ACFS 11.2 How To Create “A CRS Managed" ACFS FileSystem On a Cluster RAC Configuration Through the ASMCA Assistance Or Command-Line (Doc ID 1484221.1)
以此作为参考，在我自己的环境实际演练下。
1.使用root用户在所有节点创建挂载点
--1.Please create the mount points on all the nodes (as root user):
mkdir /ggs
2.创建ACFS磁盘组（在+ASM1实例上操作）
--2.Connect to the ASM instance & create the ACFS diskgroup (from the +ASM1 instance):
CREATE DISKGROUP ACFS EXTERNAL REDUNDANCY
DISK 'ORCL:ASMDISK18' SIZE 4157 M
DISK 'ORCL:ASMDISK19' SIZE 4157 M
ATTRIBUTE 'compatible.asm' = '11.2', 'compatible.advm' = '11.2';
注意：实际生产强烈建议使用单独的ACFS磁盘组，专门用于创建ACFS集群文件系统。因我这里演示没有额外资源，故借用当前已存在的FRA磁盘组来演示。
3.创建ACFS卷组（在+ASM1实例上操作）
--3.Create the ACFS volume (from the +ASM1 instance)
$ sqlplus / as sysasm
SQL>
ALTER DISKGROUP FRA ADD VOLUME ggs SIZE 2G;
4.确认卷组已建立
--4.Verify the volume was created and obtain the new volume name:
$ asmcmd
ASMCMD> volinfo -a
Diskgroup Name: FRA
Volume Name: GGS
Volume Device: /dev/asm/ggs-57
State: ENABLED
Size (MB): 2048
Resize Unit (MB): 32
Redundancy: UNPROT
Stripe Columns: 4
Stripe Width (K): 128
Usage:
Mountpath:
ASMCMD>
5.使用root用户在节点1的新卷上创建ACFS文件系统
--5.From the first node, please create the ACFS filesystem on the new volume ( e.g. “/dev/asm/acfstestvol-76”) as “root” user:
/sbin/mkfs -t acfs -b 4k /dev/asm/ggs-57
mkfs.acfs: version = 11.2.0.4.0
mkfs.acfs: on-disk version = 39.0
mkfs.acfs: volume = /dev/asm/ggs-57
mkfs.acfs: volume size = 2147483648
mkfs.acfs: Format complete.
6.使用root用户添加ACFS文件系统到CRS中
--6.Register the ACFS filesystem & new volume with the CRS as root user:
/opt/app/11.2.0/grid/bin/srvctl add filesystem -d /dev/asm/ggs-57 -g 'FRA' -v ggs -m /ggs -u oracle
7.使用root用户启动ACFS文件系统资源
--7.Start the new ACFS CRS resource (as root user):
/opt/app/11.2.0/grid/bin/srvctl start filesystem -d /dev/asm/ggs-57
8.使用root用户设置属组和权限
--8.Set the desired new ownership and permissions as root user:
chown oracle:oinstall /ggs
chmod 755 /ggs
9.核实ACFS在两边节点都OK
--9.Verify the new ACFS CRS managed filesystem is mounted on both nodes:
Node #1
df -k /ggs
df -TH /ggs
Node #2
df -k /ggs
df -TH /ggs
查看所有节点都挂载成功这个ACFS的文件系统，就可以看到：
[grid@jystdrac1 ~]$ df -k /ggs
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/asm/ggs-57 2097152 82256 2014896 4% /ggs
[grid@jystdrac1 ~]$ df -TH /ggs
Filesystem Type Size Used Avail Use% Mounted on
/dev/asm/ggs-57 acfs 2.2G 85M 2.1G 4% /ggs
[oracle@jystdrac2 ggs]$ df -k /ggs
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/asm/ggs-57 2097152 82256 2014896 4% /ggs
[oracle@jystdrac2 ggs]$ df -TH /ggs
Filesystem Type Size Used Avail Use% Mounted on
/dev/asm/ggs-57 acfs 2.2G 85M 2.1G 4% /ggs
10.核实ACFS CRS资源是否正常显示
--10.Verify the ACFS CRS resource is present in the CRS:
crsctl stat res -w "TYPE = ora.acfs.type"
[grid@jystdrac1 ~]$ crsctl stat res -w "TYPE = ora.acfs.type"
NAME=ora.fra.ggs.acfs
TYPE=ora.acfs.type
TARGET=ONLINE , ONLINE
STATE=ONLINE on jystdrac1, ONLINE on jystdrac2