11g Release 2 ACFS (Automatic Storage Management Cluster File System)
Posted by Superadmin on June 23 2022 16:54:49

11g Release 2 ACFS (Automatic Storage Management Cluster File System)

he following are some of the new ASM related features introduced in 11g R2:

In Oracle 11g Release 2, ASM and the Oracle Clusterware are now installed in a common home called the Grid Infrastructure Home.

The clusterware files like the Voting Disk and the Cluster Registry can no longer be installed on raw devices. They can now be installed on ASM Disk Groups

Need to connect as SYSASM to perform any administrative operations on the ASM instance or we will get an ORA-01031 error as shown below

[oracle@redhat346 stage]$ sqlplus sys/xxx as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on Fri Oct 16 09:10:55 2009

Copyright (c) 1982, 2009, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Automatic Storage Management option

SQL> shutdown immediate;
ORA-01031: insufficient privileges

ACFS or Automatic Storage Management Cluster File System is an extension of the ASM technology to support storage of files like Oracle binaries and other application files related to text,video, audio etc

The example below will show how we can configure and mount a ACFS on Red HatLinux with 11g R2.

Note: ASM operations like creating and adding disk groups etc which were earlier performed via DBCA will now be performed via the GUI ASM Configuration Assistant which needs to be launched via the ‘asmca‘ command from the Grid Infrastructure Home.

We first create a disk group called ASMCFS and then create a volume called ASMCFS_VOL1 of 25 GB using the disk group that we just created.

We will then use a mount point /u03 to mount this file system. A configuration script is created which includes the commands to be run as root to mount this file system. After the script is run we will see the ACFS file system mounted on /u03.

/bin/mount -t acfs /dev/asm/asmcfs_vol1-44 /u03

chown oracle:dba /u03

chmod 775 /u03

[oracle@redhat346 stage]$ df -k

Filesystem           1K-blocks      Used Available Use% Mounted on
.....
......
/dev/asm/asmcfs_vol1-44
                      26214400     89112  26125288   1% /u03

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