Creating an ACFS file system on OCI DB system
In an DB system on OCI if we want to add any file system then we can use the ACFS file system.
We can create an ACFS file system using below
1) Login to DB system with grid user
2) Create a Volume by picking space from DATA disk group.
[grid@foa ~]$ asmcmd lsdg
State Type Rebal Sector Logical_Sector Block AU Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks Voting_files Name
MOUNTED EXTERN N 512 512 4096 4194304 262144 4372 0 4372 0 Y DATA/
MOUNTED EXTERN N 512 512 4096 4194304 262144 257212 0 257212 0 N RECO/
asmcmd volcreate -G data -s 20G oradata1
3) Validate the volume created
[grid@foa ~]$ asmcmd volinfo -G data oradata1
Diskgroup Name: DATA
Volume Name: ORADATA1
Volume Device: /dev/asm/oradata1-377
State: ENABLED
Size (MB): 20480
Resize Unit (MB): 64
Redundancy: UNPROT
Stripe Columns: 8
Stripe Width (K): 1024
Usage:
Mountpath:
4) We can check the volume physical details.
[grid@foa ~]$ fdisk -l /dev/asm/oradata1-377
Disk /dev/asm/oradata1-377: 21.5 GB, 21474836480 bytes, 41943040 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 1048576 bytes
5) Format the new volume as ACFS
[grid@foa ~]$ /sbin/mkfs -t acfs /dev/asm/oradata1-377
mkfs.acfs: version = 19.0.0.0.0
mkfs.acfs: on-disk version = 46.0
mkfs.acfs: volume = /dev/asm/oradata1-377
mkfs.acfs: volume size = 21474836480 ( 20.00 GB )
mkfs.acfs: Format complete.
6) Register the mount
Exit from grid user and connect as root.
mkdir /backup
/sbin/acfsutil registry -a /dev/asm/oradata1-377 /backup -u oracle
7) Verify
df -h
/dev/asm/oradata1-377 20G 414M 20G 3% /backup
https://www.funoracleapps.com/2022/11/creating-acfs-file-system-on-oci-db.html
