Databases Reference
In-Depth Information
DATA_CM01 o/192.168.10.3/DATA_CD_03_cm01cel01 NORMAL NORMAL CM01CEL01
DATA_CM01 o/192.168.10.3/DATA_CD_04_cm01cel01 NORMAL NORMAL CM01CEL01
... ASM disks omitted for brevity
36 rows selected.
We can see that
DATA_CM01
is built on Exadata grid disks spanning each of three storage servers in our Exadata
Quarter Rack (InfiniBand IP addresses
192.168.10.3
,
192.168.10.4
, and
192.168.10.5
). When building ASM disk
groups, the candidate storage servers are provided by a list of IP addresses in
cellip.ora
:
[grid@cm01dbm01 ~]$ locate cellip.ora
/etc/oracle/cell/network-config/cellip.ora
/opt/oracle.SupportTools/onecommand/tmp/cellip.ora
[grid@cm01dbm01 ~]$ cat /etc/oracle/cell/network-config/cellip.ora
cell="192.168.10.3"
cell="192.168.10.4"
cell="192.168.10.5"
[grid@cm01dbm01 ~]$
Not
■
for more information about how oracle ASM disks map to Exadata grid disks, please see Recipe 3-2.
As discussed in Recipe 2-3, the
diskmon
process on the Exadata compute nodes also plays a role on Exadata
environments.
diskmon
is responsible for handling storage network and cell monitoring processes and spawns slave
processes to handle I/O-related cell events and message broadcasting.
How It Works
For those of you who are familiar with Oracle 11gR2 Real Application Cluster, you'll find that on Exadata the overall
Oracle RAC software architecture is the same as in non-Exadata clusters. There are, however, a few configuration
details unique to Exadata with respect to database storage. Specifically, database storage is achieved exclusively
with Oracle ASM. The disks that comprise Exadata disk groups are addressable using InfiniBand-aware naming
conventions.
2-6. Validating Oracle 11gR2 Real Application Clusters
Networking on Exadata
Problem
As an Exadata Database Machine administrator, or DMA, you wish to validate the Oracle Real Application Clusters
network installation on your Exadata compute servers.
Solution
Exadata compute servers have three, and optionally four, types of networks: the InfiniBand network, the
administration network, the client access network, and an optional additional network. For the purposes of the Oracle
Search WWH ::
Custom Search