2.2.1 Configuring Exadata Storage Discovery for Oracle ASM
To enable Oracle ASM to discover and access Exadata grid disks, you must
configure the ASM_DISKSTRING
initialization parameter.
Exadata grid disks are specified by using a discovery string with the following format:
o/<cell_IP_pattern>/<griddisk_name_pattern>
In the discovery string:
-
<cell_IP_pattern>
identifies Exadata storage server IP address (as listed in thecellip.ora
file). -
<griddisk_name_pattern>
identifies grid disks by name.
The wildcard character (*
) can be used to expand the
<cell_IP_pattern>
and
<griddisk_name_pattern>
values.
For example, the following ASM_DISKSTRING
setting discovers all Exadata
grid disks on all cells specified in the cellip.ora
file:
ASM_DISKSTRING = 'o/*/*'
You can use a more specific setting to discover a subset of grid disks. For example, the
following ASM_DISKSTRING
setting discovers only the grid disks with
names that begin with DATA
:
ASM_DISKSTRING = 'o/*/DATA*'
You can change the ASM_DISKSTRING
initialization parameter
when the Oracle ASM instance is running with the SQL ALTER SYSTEM
command. If you edit the ASM_DISKSTRING
initialization parameter in the
initialization parameter file when the Oracle ASM instance is running, then the Oracle
ASM instance must be shut down and restarted for the change to take effect.
See Also:
-
Oracle Automatic Storage Management Administrator's Guide for additional information about the following:
-
Oracle Database Reference for additional information about the ASM_DISKSTRING initialization parameter
-
Oracle Database SQL Language Reference for additional information about the
ALTER SYSTEM
command
Parent topic: Administering Oracle ASM on Exadata