So if you read my Getting Started post and have already created your first Oracle Automatic Storage Management (ASM) Clustered File System (ACFS) or have been using it for a while. You may have found yourself needing to resize the ACFS File System, this is easily completed with acfsutil utility.
As you can see below my 1TB ASM Clustered File System (ACFS) file system demobck is now 100% full, time to resize.
[oracle@z-rac1 ~]$ df -Th Filesystem Type Size Used Avail Use% Mounted on /dev/asm/demobck-142 acfs 1.0T 1022G 2.2G 100% /mnt/demobck
OK, let’s review the ACFS ASM DiskGroup using asmcmd
[oracle@z-rac1 ~]$ asmcmd lsdg -g ACFS
Inst_ID State Type Rebal Sector Logical_Sector Block AU Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks Voting_files Name
1 MOUNTED EXTERN N 512 512 4096 4194304 10485760 9437000 0 9437000 0 N ACFS/
2 MOUNTED EXTERN N 512 512 4096 4194304 10485760 9437000 0 9437000 0 N ACFS/And use asmcmd volume info to check size.
[oracle@z-rac1 ~]$ asmcmd volinfo -G ACFS DEMOBCK Diskgroup Name: ACFS Volume Name: DEMOBCK Volume Device: /dev/asm/demobck-142 State: REMOTE Size (MB): 1048576 Resize Unit (MB): 64 Redundancy: UNPROT Stripe Columns: 8 Stripe Width (K): 1024 Usage: ACFS Mountpath: /mnt/demobck
The asmcmd lsattr command can also be used used to list the ASM DiskGroup attributes, from the below we can see we are using non-Exadata storage, (cell.smart_scan_capable FALSE)
[oracle@z-rac1 ~]$ asmcmd lsattr -l -G ACFS Name Value access_control.enabled FALSE access_control.umask 066 appliance._partnering_type GENERIC ate_conversion_done true au_size 4194304 cell.smart_scan_capable FALSE cell.sparse_dg allnonsparse compatible.advm 19.0.0.0.0 compatible.asm 19.0.0.0.0 compatible.rdbms 12.1.0.0.0 content.check FALSE content.type data content_hardcheck.enabled FALSE disk_repair_time 12.0h failgroup_repair_time 24.0h idp.boundary auto idp.type dynamic logical_sector_size 512 phys_meta_replicated true preferred_read.enabled FALSE scrub_async_limit 1 scrub_metadata.enabled TRUE sector_size 512 thin_provisioned FALSE vam_migration_done false
Resize ACFS Volume
OK let’s now resize our 1TB to 2TB using the acfsutil command.
[oracle@z-rac1 ~]$ acfsutil size 2T /mnt/demobck
acfsutil size: Resizing file system in steps
acfsutil size: Resizing file system to 1.0156 TB
...
acfsutil size: Resizing file system to 1.9844 TB
acfsutil size: Resizing file system to 2.0000 TB
acfsutil size: new file system size: 2199023255552 (2097152MB)
And let’s repeat the df , we can now see our file system is 2TB.
[oracle@z-rac1 ~]$ df -Th /mnt/demobck Filesystem Type Size Used Avail Use% Mounted on /dev/asm/demobck-142 acfs 2.0T 1022G 1.1T 50% /mnt/demobck
From the above we can see my demobck file system in now only 50% utilised.
The acfsutil command provides a number of useful options to show volume and file system information.
ACFS volume info
[oracle@z-rac1 ~]$ acfsutil info storage -u GB -l ACFS Diskgroup: ACFS (79% free) total disk space: 10240.00 ASM file space: 2048.00 total free space: 8191.82 redundancy type: EXTERN Total space used by ASM non-volume files: used: 0.00 mirror used: 0.00 volume: /dev/asm/demobck-142 total: 2048.00 free: 1026.12 redundancy type: unprotected file system: /mnt/demobck ---- unit of measurement: GB
ACFS filesystem info
[oracle@z-rac1 ~]$ acfsutil info fs /mnt/demobck /mnt/demobck ACFS Version: 19.0.0.0.0 on-disk version: 49.0 compatible.advm: 19.0.0.0.0 ACFS compatibility: 19.0.0.0.0 flags: MountPoint,Available,KiloSnap creation time: Mon Nov 2 11:10:09 2020 mount time: Mon Nov 2 13:53:16 2020 mount sequence number: 0 number of nodes: 2 allocation unit: 4096 metadata block size: 4096 volumes: 1 total size: 2199023255552 ( 2.00 TB ) total free: 1101788835840 ( 1.00 TB ) file entry table allocation: 8781824 primary volume: /dev/asm/demobck-142 label: state: Available major, minor: 251, 72705 logical sector size: 512 size: 2199023255552 ( 2.00 TB ) free: 1101788835840 ( 1.00 TB ) metadata read I/O count: 251149 metadata write I/O count: 140749 total metadata bytes read: 1264570368 ( 1.18 GB ) total metadata bytes written: 841306112 ( 802.33 MB ) ADVM diskgroup: ACFS ADVM resize increment: 67108864 ADVM redundancy: unprotected ADVM stripe columns: 8 ADVM stripe width: 1048576 number of snapshots: 0 snapshot space usage: 0 ( 0.00 ) replication status: DISABLED compression status: DISABLED
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