Database Reference
In-Depth Information
And the Oracle 11gR2 Clusterware stores its OCR/voting disk files in +DATADG/<Clustername>.
The diskgroup ACFSDG is for Oracle ACFS. ASM volumes are created in the ASM diskgroup ACFSDG. For each of
these volumes, an ASM device on the operating system is automatically created under /dev/asm. These volumes
are managed by Oracle ADVM. Oracle ACFS can be created on these volumes. Oracle ADVM provides the standard
device driver interface for ACFS to access these volumes. These ACFS are mounted under given OS mount points; for
example, /acfs1, /acfs2, and /acfs3 in this case.
Create ACFS
Before starting to create an ACFS, you have to ensure that several prerequisites are met in your environment.
In Oracle 11gR2, you need to ensure that the required modules are loaded by running the lsmode command.
These modules are as follows: oracleasm, oracleoks, and oracleacfs. If they are all loaded, the lsmod command should
have the following results:
$lsmod
Module Size User by
Oracleacfs 781732 0
Oracleadvm 212736 0
Oracleoks 224992 2 oracleacfs, oracleadvm
oracleasm 46484 1
If these modules are not automatically loaded, you need to load them manually using the acfsload command.
You might see an error message like this:
[root@k2r720n1 ~]# /u01/app/11.2.0/grid/bin/acfsload start -s
ACFS-9459: ADVM/ACFS is not supported on this OS version: '2.6.32-220.el6.x86_64'
This indicates that the version of OS is not supported by ACFS. Refer to MOS note [1369107.1] to check the
current ACFS supported on the OS platform. For example, at the time this chapter was written, ACFS was supported
for update 3 or later for Oracle Linux 5.x and Red Hat Enterprise Linux 5.x. For Oracle Linux 6.x and Red Hat
Enterprise Linux 6.x, it would be necessary to apply 11.2.0.3.3.GI PSU patch for 6.0, 6.1, 6.2 and required to apply
11.2.0.3.4GI PSU patch for 6.3. If the ACFS is not supported in your OS kernel version, the acfsload command will
report the error, as shown in the preceding. And in the ASMCA GUI interface, the Volume tab and ASM Cluster File
systems tab are grayed out as shown in Figure
5-13
. You need to follow the support document's instructions to get the
ACFS supported in your OS. For example, since the test cluster is running EL 6.2 with kernel version '2.6.32-220.el6.
x86_64, it is required to apply 11.2.0.3.3.GI PSU (Patch 13919095) to get the ACFS supported.
