ASM Filter Driver是一个可以取代 ASMLIB 和 udev 设置的新功能，它可以一举取代 ASMLIB 和手动设置 udev rules 文件的繁琐，并且最重要的是 I/O Filter 功能。所谓的I/O Filter功能可以拒绝所有无效的 I/O 请求，最主要的作用是防止意外覆写 ASM 磁盘的底层盘，在后面的测试中可以看到对于 root 用户的 dd 全盘清零这样的变态操作也都是可以过滤的。
1、查询集群状态 [root@odb02 ~]# crsctl check cluster -all ************************************************************** odb02: CRS-4537: Cluster Ready Services is online CRS-4529: Cluster Synchronization Services is online CRS-4533: Event Manager is online ************************************************************** odb03: CRS-4537: Cluster Ready Services is online CRS-4529: Cluster Synchronization Services is online CRS-4533: Event Manager is online ************************************************************** 2、查询集群模式 [root@odb02 ~]# crsctl get cluster mode status Cluster is running in "flex" mode从12c R2以后，默认的集群模式为flex。
3、查询当前的ASM磁盘以及发现路径 [root@odb02 ~]# Oracleasm listdisks | xargs oracleasm querydisk -p Disk "DATA01" is a valid ASM disk /dev/sdb1: LABEL="DATA01" TYPE="oracleasm" Disk "FRA001" is a valid ASM disk /dev/sdc1: LABEL="FRA001" TYPE="oracleasm" [root@odb02 ~]# asmcmd dsget parameter:/dev/oracleasm/disks/* profile:/dev/oracleasm/disks/* 4、设置新的ASM磁盘发现路径 [grid@odb02 ~]$ asmcmd dsset '/dev/oracleasm/disks/*','AFD:*' [grid@odb02 ~]$ asmcmd dsget parameter:/dev/oracleasm/disks/*, AFD:* profile:/dev/oracleasm/disks/*,AFD:* 5、检查 GI 环境中的节点 [grid@odb02 ~]$ olsnodes odb02 odb03 6、RAC所有节点停止集群服务 [root@odb02 ~]# crsctl stop crs [root@odb03 ~]# crsctl stop crs 7、RAC所有节点卸载ASMLIB软件odb02 [root@odb02 ~]# systemctl disable oracleasm Removed symlink /etc/systemd/system/multi-user.target.wants/oracleasm.service. [root@odb02 ~]# oracleasm status Checking if ASM is loaded: yes Checking if /dev/oracleasm is mounted: yes [root@odb02 ~]# oracleasm exit Unmounting ASMlib driver filesystem: /dev/oracleasm Unloading module "oracleasm": oracleasm [root@odb02 ~]# ls -ltr /dev/oracleasm/ total 0 [root@odb02 ~]# yum -y remove oracleasm-support
odb03 [root@odb03 ~]# systemctl disable oracleasm Removed symlink /etc/systemd/system/multi-user.target.wants/oracleasm.service. [root@odb03 ~]# oracleasm status Checking if ASM is loaded: yes Checking if /dev/oracleasm is mounted: yes [root@odb03 ~]# oracleasm exit Unmounting ASMlib driver filesystem: /dev/oracleasm Unloading module "oracleasm": oracleasm [root@odb03 ~]# ls -ltr /dev/oracleasm/ total 0 [root@odb03 ~]# yum -y remove oracleasm-support 8、RAC所有节点停止acfsload服务 [root@odb02 ~]# lsmod|grep acfs [root@odb02 ~]# acfsload stop [root@odb02 ~]# lsmod|grep acfs 9、RAC所有节点配置AFD
AFD Configure，实际上这是一个解压程序包，安装，并加载 Driver 的过程，需要消耗一些时间。
[root@odb02 ~]# asmcmd afd_configure ASMCMD-9523: command cannot be used when Oracle Clusterware stack is up --如果遇到以上报错，先停止has，再执行一次。 [root@odb02 ~]# crsctl stop has [root@odb02 ~]# asmcmd afd_configure AFD-627: AFD distribution files found. AFD-634: Removing previous AFD installation. AFD-635: Previous AFD components successfully removed. AFD-636: Installing requested AFD software. AFD-637: Loading installed AFD drivers. AFD-9321: Creating udev for AFD. AFD-9323: Creating module dependencies - this may take some time. AFD-9154: Loading 'oracleafd.ko' driver. AFD-649: Verifying AFD devices. AFD-9156: Detecting control device '/dev/oracleafd/admin'. AFD-638: AFD installation correctness verified. Modifying resource dependencies - this may take some time.配置完成后，验证下状态：
[root@odb02 ~]# asmcmd afd_state ASMCMD-9526: The AFD state is 'LOADED' and filtering is 'ENABLED' on host 'odb02' [root@odb03 ~]# asmcmd afd_state ASMCMD-9526: The AFD state is 'LOADED' and filtering is 'ENABLED' on host 'odb03' --如果上述的状态为disabled，则使用下面的命令启用 [root@odb02 ~]# asmcmd afd_filter -e另外，会生成一个/etc/oracleafd.conf文件，内容如下：
[root@odb02 ~]# cat /etc/oracleafd.conf afd_diskstring='/dev/oracleasm/disks/*'如果其他节点没有，就把这个文件复制一份过去，避免启动crs的时候出错。
10、迁移所有ASM磁盘这个在一个节点操作，在其他的节点中，不再需要作label，而是直接scan即可，这跟使用 ASMLIB的操作非常相似。另外命令后面必须加migrate参数，才可以成功。
[root@odb02 ~]# asmcmd afd_label data01 /dev/sdb1 --migrate [root@odb02 ~]# asmcmd afd_label fra001 /dev/sdc1 --migrate [root@odb02 ~]# asmcmd afd_lsdsk -------------------------------------------------------------------------------- Label Filtering Path ================================================================================ DATA01 ENABLED /dev/sdb1 FRA001 ENABLED /dev/sdc1