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Creating an ACFS file system on OCI DB system

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





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