HP StorageWorks Clustered File System 3.2.1 Windows Storage Server Edition Administration Guide (February 2006)

Chapter 3: Cluster Administration 15
– If one of these hostnames has already been referenced
unsuccessfully, the DNS resolver cache may need to be flushed
with “ipconfig /flushdns” (see Microsoft Knowledge Base article
320845).
– Certain Microsoft Knowledge Base articles caution that in the case
of Exchange SMTP, and possibly other applications, the use of the
hosts file can interfere with mail flow (see Microsoft Knowledge
Base article 296215).
– Although using the hosts file provides immunity to DNS problems,
it must be manually updated on each node. For example, if an IP
address changes, all of the hosts files must be updated. Mismatches
between DNS and hosts files (such as typos or missing nodes) can
lead to confusing problems.
• When fabric fencing is configured, do not enable or disable the
FibreChannel ports used by the cluster. HP Clustered File System
must have complete control over these ports to protect the integrity of
the shared filesystems on the SAN.
• For best performance, we recommend that you monitor the cluster
from a separate administrative station rather than from a server in the
cluster. The HP CFS Management Console can be installed on
Windows systems outside the cluster.
• To ensure that file times are consistent across the cluster, it is
important that all cluster servers operate with synchronized time-of-
day clocks. An NTP server is one commonly used mechanism for
synchronizing system clocks.
• The following network changes should not be made while HP
Clustered File System is running. Attempting to do any of the
following can adversely affect the entire cluster. If you need to
perform these actions on a particular server, first stop HP Clustered
File System on that server. Then make your change and restart HP
Clustered File System.
– Add or delete a network interface from the operating system.
– Change network properties on the Network Control Panel.