HP StorageWorks Clustered File System 3.6.0 Windows Storage Server Edition Administration Guide (403103-005, January 2008)

Chapter 3: Introduction to HP Clustered File System 14
SNMP Service
The HP Clustered File System SNMP service provides tools that can be
used to retrieve all cluster-wide state and status information. The service
includes the following:
• An SNMP extension agent that is used by the Microsoft SNMP service.
(The Microsoft SNMP service must be installed and configured on the
servers in the cluster.)
• MIBs that can be loaded into the MIB browser tool provided with your
Network Management Station (NMS).
• An SNMP event notifier service that can send HP Clustered File
System events as SNMP traps.
Event Notifier Services
HP Clustered File System provides event notifier services that can be
configured to respond when certain cluster events occur. The services can
send an SNMP trap to an SNMP trap forwarding target, send email to
certain addresses, or run a script. Each service can be configured with the
specific events that should trigger a response from the service.
Cluster Design Guidelines
Be sure to consider the following guidelines when planning the physical
configuration of your HP Clustered File System cluster.
Server Memory
Memory resources are consumed on each cluster server to manage the
state necessary to preserve the coherency of shared filesystems. For this
reason, the servers in the cluster should have approximately equal
amounts of physical memory. As a guideline, the ratio of memory
between the smallest and largest servers should not exceed 2. For
example, the smallest server could have 1 GB of memory and the largest
server 2 GB. If this ratio is exceeded (such as a 256 MB server and a 2 GB
server, with a ratio of 8), paging can increase on the smallest server to the
extent that overall cluster performance is significantly reduced.