Nas Server Cluster Deployment - HP StorageWorks 4000s - NAS Administration Manual

NAS Server Cluster Deployment

In a clustered deployment, network connections are divided into three categories: cluster
maintenance segments, client data segments, and management segments. The default shipping
configuration contains a two-port 10/100/1000 NIC that together provide one port for the
cluster maintenance and one port for management and client data. An additional management
port for remote console and diagnostics is provided off of the iLO port. HP recommends that
this connection be placed on a management LAN separate from the corporate infrastructure.
The cluster maintenance segment is also known as the heartbeat connection between the
nodes. In standard configurations, this connectivity is obtained by the use of a crossover
network cable. The same effect can be achieved by placing the heartbeat ports on its own
switch or VLAN, as illustrated in
connectivity between the nodes without interruption. If interruption occurs, the remaining
cluster node will assume the other node has gone down and initiate a failover. A second cluster
heartbeat path is often recommended as a redundant path. The redundant path is often done
over one of the remaining network segments and is not dedicated.
The client data segments of a cluster must reside on identical network segments for each node.
As illustrated in
co-location on the same segment allows cluster resources such as file shares to failover to the
second node and continues to provide availability to the resources. The failed resource will
have the same IP address after the failover and therefore must have a port corresponding to the
identified subnet of the IP address present on both nodes.
The NAS server supports the use of NIC teaming in clustered configurations. All previous
caveats from the "NAS server single node deployment" on networks section still apply.
Cluster Node A
Figure 4: NAS server cluster deployment
NAS 4000s and 9000s Administration Guide
Figure 4, Eth2 from both nodes is shown on the same segment. This
Integrated Lights-Out Port
Management and
Client Data Network Eth 2
Node A
HBA 1
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SAN Switch
Cluster
Quorum
Mirrorset
LUN 1
Figure 4 as Eth1. The purpose is to isolate and guarantee the
Cluster Heartbeat
Eth 1
Node A
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HBA 2
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Node B
HBA 2
SAN Switch
Storage Area Network
Data RAID set
Node B
Data RAID set
LUN 3
Node A
LUN 2
System Overview
Cluster Node B
Node B
HBA 1
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