HP 4000S Guia do Utilizador descarregar pdf (Página 229)

Cluster Administration

229NAS 4000s and 9000s Administration Guide

Shutting Down One Cluster Node

Caution: Shutting down a cluster node must be done only after confirming that the other

node(s) in the cluster are functioning normally. Adequate warning should be given to users

connected to resources of the node being shutdown.

Shutting down a cluster node causes file shares served by that node to fail over to the other

node(s). This will cause any currently executing client read and write operations to fail until

the cluster failover process completes. The other node(s) will be placed under a heavier load

by the extra work until the second node is powered up and rejoins the cluster.

Powering Down the Cluster

The power down process for the NAS cluster is similar to the process for a single node, but

with the cluster, extra care must be taken with the storage subsystem and the sequence of the

shutdown.

The power down process is divided into two main steps:

1. Shutting down the cluster nodes

2. Removing power from the cluster nodes

The sequence of these steps is critical. The devices must be shut down before the storage

subsystem. Improperly shutting down the nodes and the storage subsystem causes corruption

and loss of data.

Caution: Before powering down the cluster nodes, follow the proper shutdown procedure

as previously illustrated. See “Shutting Down One Cluster Node.” Only one cluster node

should be shut down at a time.

Caution: The cluster nodes should never be powered on when the storage subsystem is not

available.

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HP 4000S Guia do Utilizador Página 229