Owners Manual

Dell Integrated Systems for Oracle Business Analytics (DISOBA) – Owner’s Guide 1.0
2. Eight 1485 GB partitions or disks, for a total of 11.88 TB, that are available for data
files, FRA, REDO log files, etc.
NOTE: Though DISOBA provides up to eight partitions or disks for OCR and VDs, it is
recommended to create its ASM diskgroup with Normal Redundancy. DAAD’s HA feature
provides three additional mirrored copies residing on separate disks on top of the Normal
Redundancy, giving all-together six copies.
4.3.4 Disk Ownership and Permissions Setup using UDEV Rules
The necessary and appropriate ownership and permissions that is required on the storage
disks before Oracle 12c grid and database installation is pre-configured on the DISOBA
database nodes. These ownership and permissions are setup using UDEV rules across
eleven disks – 3 disks for OCR/VDs and 8 disks for data/FRA. The UDEV rules are
configured in the /etc/udev/rules.d/99-dell.rules file.
4.3.5 Device-Mapper Multipath
In order to employ high availability with external storage, this integrated system uses the
Linux Device-Mapper multipath utility. The advantage of using this is that storage traffic is
not only redundant, but is load-balanced across multiple connections, increasing total
throughput. Multipathing is already setup, with redundancy verified and using Dell and
Fusion-io’s best practices, before shipping to the customer.
4.3.6 ION Tuner
The OS on the database nodes are configured with best practices and storage
performance optimizations from Fusion-io. Fusion-io has included these optimizations in
an rpm package called ION Tuner. This package sets low-level kernel parameters, as well
as special UDEV rules, to optimize the performance of the DAAD. A few of the steps taken
by this optimization (as per fusionio.com) are as follows:
1. Tune block devices
2. IRQ pinning
3. Multipath optimization
For more details, see: http://www.fusionio.com/white-papers/accelerate-oracle-rac-on-
dell-poweredge-r720-servers
4.3.7 Oracle Network Configuration
In order to minimize the needed steps taken by the customer to setup the Oracle
environment, DISOBA also ships with some of the network pre-configured on the
database nodes. The network is configured using Dell and Oracle’s best practices in mind.
To keep every possible component redundant for high availability, both the public and
private networks are each configured in a redundant mode. To further increase
redundancy, each of the 40Gb Mellanox Ethernet cards have one link from each of the
public and private networks to reduce yet another single point of failure. By spreading both