Compaq Parallel Database Cluster Model PDC/O2000 for Oracle8i and Windows 2000 Administrator Guide

2-74 Compaq Parallel Database Cluster Model PDC/O2000 for Oracle8i and Windows 2000 Administrator Guide
Compaq Confidential – Need to Know Required
Writer: John Blackburn Project: Compaq Parallel Database Cluster Model PDC/O2000 for Oracle8i and Windows 2000 Administrator Guide Comments:
Part Number: 225082-002 File Name: c-ch2 Cluster Architecture.doc Last Saved On: 6/13/01 10:21 AM
Figure 2-30 shows another option for a non-redundant Ethernet cluster
interconnect in a two-node PDC/O2000 cluster. These include an Ethernet
adapter in each node connected by Ethernet cables to an Ethernet switch or
hub.
Ethernet
cables
Ethernet Adapter Ethernet Adapter
Node 1
Node 2
Client LAN
Storage Hub/Switch
RA4000/4100 Array
Storage Hub/Switch
Figure 2-30. Non-redundant Ethernet cluster using an Ethernet switch or hub
Because Ethernet switches are required in PDC/O2000 clusters with three or
more nodes, using an Ethernet switch instead of a crossover cable makes it
easier to upgrade the cluster interconnect if more servers are added to the
cluster.
IMPORTANT: Crossover cables and Ethernet hubs cannot be used in PDC/O2000 clusters
with a redundant Ethernet cluster interconnect or in PDC/O2000 clusters with three or
more nodes.