3.6.1 HP PolyServe Matrix Server Administration Guide (T5392-96018, August 2008)

Chapter 3: Introduction to Matrix Server 14
addresses, or run a script. Each service can be configured with the specific
events that should trigger a response from the service.
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 36 for more information.
Matrix Design Guidelines
Be sure to consider the following guidelines when planning the physical
configuration of your Matrix Server matrix.
Server Memory
Memory resources are consumed on each matrix server to manage the
state necessary to preserve the coherency of shared filesystems. For this
reason, the servers in the matrix 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 matrix 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.