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

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Gavin Soorma Real Application Clusters

The 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

    asmca_11gr2

    asmca_2

    asmca_3

    asmca_4

    asmca_5

    asmca_6

    asmca_7

    asmca_8

    asmca_9

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    Last Update: June 23, 2020  

    October 16, 2009 25 Gavin Soorma
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    4 thoughts on “11g Release 2 ACFS (Automatic Storage Management Cluster File System)”

    1. Santosh Rai

      Hi ,

      I need clearification before i can start installing of 11g grid infrastructure can i need to install GRID_HOME and ORACLE_HOME binary all other node separately or it’ll install automatically . As i know from some other doc that these HOME we can’t install on ACFS or cluster file system then how can we share across all nodes .

      Thanks in advance .
      Santosh Rai

    2. Santosh Rai

      Hi ,

      I need clarification before i can start installing of 11g grid infrastructure can i need to install GRID_HOME and ORACLE_HOME binary all other node separately or it’ll install automatically . As i know from some other doc that these HOME we can’t install on ACFS or cluster file system then how can we share across all nodes .

      Thanks in advance .
      Santosh Rai

    3. Gavin Soorma

      Hi Santosh – if you have say two nodes in the cluster, you need to only do the installation once – when you configure SSH (which is one of the initial RAC setup steps), it will enable the installation user account to remotely login to the other nodes in the cluster and perform the software installation – not very clear what you question regarding ACFS is – can you please clarify – thanks

    4. Narendra

      Gavin,
      Thansks for such a nice article! I am planning to go with ACFS and my question to you is what are the prerequisits which I may need to deal with SA team. If I get storage, how do I deal with to make it ACFS copatible, if you remeber there used to steps to configure OCFS2 in 10g, if we have to do same then couold you please provide all those details.

      Thanks
      Narendra

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