用命令行创建和挂载ACFS文件系统

Posted 2022-11-02 dingdingfish

创建和挂载ACFS文件系统

以下创建volumn并显示其信息，用grid用户执行：

ASMCMD> volcreate -G data -s 50G datavol01

ASMCMD> volinfo -G data datavol01
Diskgroup Name: DATA

         Volume Name: DATAVOL01
         Volume Device: /dev/asm/datavol01-146
         State: ENABLED
         Size (MB): 51200
         Resize Unit (MB): 64
         Redundancy: UNPROT
         Stripe Columns: 8
         Stripe Width (K): 1024
         Usage:
         Mountpath:

SQL> 
col VOLUME_DEVICE for a40
SELECT volume_name, volume_device FROM V$ASM_VOLUME WHERE volume_name ='DATAVOL01';

VOLUME_NAME                    VOLUME_DEVICE
------------------------------ ----------------------------------------
DATAVOL01                      /dev/asm/datavol01-146

mkfs不一定非用root执行，device file的ownership可以允许asmadmin，因此此处用grid用户执行，但oracle用户是不行的：

$ ls -l /dev/asm/datavol01-146
brwxrwx--- 1 root asmadmin 251, 74754 Oct 14 06:56 /dev/asm/datavol01-146

$ id oracle
uid=101(oracle) gid=1001(oinstall) groups=1001(oinstall),1006(asmdba),1003(dba),1002(dbaoper)

$ id grid
uid=102(grid) gid=1001(oinstall) groups=1001(oinstall),1006(asmdba),1005(asmoper),1004(asmadmin),1002(dbaoper)

$ id
uid=102(grid) gid=1001(oinstall) groups=1001(oinstall),1002(dbaoper),1004(asmadmin),1005(asmoper),1006(asmdba)

$ /sbin/mkfs -t acfs  /dev/asm/datavol01-146
mkfs.acfs: version                   = 19.0.0.0.0
mkfs.acfs: on-disk version           = 46.0
mkfs.acfs: volume                    = /dev/asm/datavol01-146
mkfs.acfs: volume size               = 53687091200  (  50.00 GB )
mkfs.acfs: Format complete.

注册ACFS文件系统，grid用户不行，改用root好了：

$ acfsutil registry -a /dev/asm/datavol01-146 /u02/data
PRCN-2018 : Current user grid is not a privileged user
acfsutil registry: ACFS-09173: The srvctl command line "/u01/app/19.0.0.0/grid/bin/srvctl add filesystem -device /dev/asm/datavol01-146 -path /u02/data" failed to execute. (0)
acfsutil registry: ACFS-03111: unable to add ACFS mount /u02/data within Oracle Registry

# acfsutil registry -a /dev/asm/datavol01-146 /u02/data
acfsutil registry: mount point /u02/data successfully added to Oracle Registry

这个注册的操作自动把文件系统也挂载了：

# df -h
Filesystem                      Size  Used Avail Use% Mounted on
...
/dev/asm/datavol01-146           50G  411M   50G   1% /u02/data

修改文件系统权限：

# chown -R oracle:oinstall /u02/data

然后测试从本地文件系统拷贝文件到ACFS：

# su - oracle
$ cd /u02/data

$ time cp /u01/data/lineorder.tbl .
real    5m26.409s
user    0m0.252s
sys     0m48.224s

$ ls -sh lineorder.tbl
38G lineorder.tbl

如果在本地文件系统内拷贝文件：

$ cd /u01/data
$ time cp lineorder.tbl lineorder.tbl.bak
real    10m33.930s
user    0m0.209s
sys     0m37.060s

由于ACFS底层是由多个spindle构成，因此读写速度更好一些。

在另一台同配实例上测试，结果还是比较一致的：

## 从本地文件系统拷贝到ACFS
real    5m26.242s
user    0m0.180s
sys     0m32.977s

## 本地文件系统之间拷贝
real    10m39.805s
user    0m0.150s
sys     0m25.188s

## 从ACFS拷贝到本地文件系统
real    5m0.561s
user    0m0.111s
sys     0m24.073s

## ACFS之间拷贝
real    8m30.341s
user    0m0.146s
sys     0m29.424s

扩展ACFS文件系统

非常简单：

# acfsutil size 80G /u02/data
# df -h
...
/dev/asm/datavol01-27            80G   38G   43G  48% /u02/data

缩小也是可以的：

# acfsutil size 50G /u02/data
acfsutil size: Resizing file system in steps
acfsutil size: Resizing file system to 0.0625 TB
acfsutil size: Resizing file system to 0.0488 TB
acfsutil size: new file system size: 53687091200 (51200MB)

卸载和删除ACFS文件系统

# acfsutil registry -d /u02/data
acfsutil registry: successfully removed ACFS mount point /u02/data from Oracle Registry

# umount /u02/data

# acfsutil rmfs /dev/asm/datavol01-146

ASMCMD> voldisable -G data datavol01
ASMCMD> voldelete -G data datavol01

参考

• Creating an Oracle ACFS File System
• Deregistering, Dismounting, and Disabling Volumes and Oracle ACFS File Systems
• How To Resize An ACFS Filesystem/ASM Volume (ADVM) (文档 ID 1173978.1)