4.0.0 HP Polyserve Matrix Server Administration Guide (T5392-96052, March 2010)

SNMP service
The Matrix Server SNMP service provides tools that can be used to retrieve all
matrix-wide state and status information. See “Using the Matrix Server SNMP
service” on page 45 for more information.
Cluster design guidelines
Be sure to consider the following guidelines when planning the physical configuration
of your 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 1 GB server and an 8 GB server, with a
ratio of 8), paging can increase on the smallest server to the extent that overall cluster
performance is significantly reduced.
Supported configurations
Matrix Server supports multiple FibreChannel switches configured as a single fabric
and multiported SAN disks. iSCSI arrays are also supported. The following diagrams
show some sample matrix configurations using these components.
Single FC port, single FC switch, single FC fabric
This is the simplest configuration. Each server has a single FibreChannel port
connected to the FibreChannel switch. The SAN includes two RAID arrays. In this
configuration, multiported SAN disks can protect against a port failure, but not a
switch failure.
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