Owners Manual

Dell Integrated Systems for Oracle Database 2.0 - Owner’s Guide 1.1

As shown in Figure 13, each storage pool contains two ioMemory cards, one from each of

the two DAAD nodes in the HA pair. Altogether, four storage pools are created per DAAD

HA pair.

Each volume that is preconfigured is assigned a primary storage node and a secondary

storage node. DAAD ION clustering software uses synchronous replication protocol. Local

‘write’ operations on the primary node are considered complete only after both the local

and the remote disk write operations have been confirmed. As a result, loss of a single

node is guaranteed not to lead to any data loss. As shown in Figure 14, volumes v_a1,

v_b1, v_c1, and v_d1 use storage node 1 (fcion1a) as the primary node and volumes

v_a2, v_b2, v_c2 and v_d2 use storage node 2 (fcion1b) as the primary node to

present the volumes to the database nodes. Volumes v_a1’, v_b1’, v_c1’, v_d1’,

v_a2’, v_b2’, v_c2’ and v_d2’ are their respective mirrored volumes. By creating

two volumes per storage pool and by alternating the primary node between the two DAAD

nodes in the HA pair, balances the workloads while maintaining redundancy for high

availability.

Each of these eight volumes is created with the same size and are presented to the Oracle

database nodes to form Oracle ASM disks of an ASM disk group.

Figure 14 Storage volume setup on the nodes in a DAAD HA pair

fcion1a

ioMemory1 ioMemory1

v_a1, v_b1, v_c1, v_d1

ioMemory2 ioMemory2

ioMemory3 ioMemory3

ioMemory4 ioMemory4

v_a1

v_a2'

v_a1'

v_a2

v_b1

v_b2'

v_c1

v_c2'

v_d1

v_d2'

v_b1'

v_b2

v_c1'

v_c2

v_d1'

v_d2

DAAD HA Pair

2 x 40 GbE Interconnects

v_a2, v_b2, v_c2, v_d2

fcion1b