Server Sizing
SolarWinds UDT is capable of monitoring networks of any size, ranging from small corporate LANs to large
enterprise and service provider networks. Most SolarWinds UDT systems perform well on 3.0 GHz systems
with 4 GB of RAM, using default polling engine settings. However, when monitoring larger networks, you
should give additional consideration to the hardware used and the system configuration.
There are three primary variables that affect scalability. The most important consideration is the number
of monitored ports, nodes, and users. Systems monitoring more than 50,000 elements require 8+ GB of
RAM. The second variable to consider is polling frequency. For instance, if you are collecting statistics more
frequently than the default, the system will have to work harder and system requirements will increase.
Finally, the number of simultaneous users accessing SolarWinds UDT directly impacts system
performance.
When planning an SolarWinds UDT installation, there are four main factors to keep in mind with respect to
polling capacity: CPU, memory, number of polling engines, and polling engine settings. For minimum
hardware recommendations, see Requirements for SolarWinds UDT. For more information about polling
engines, see "Additional Polling Engine and Web Console."
In most situations, installing SolarWinds UDT and SQL Server on different servers is highly recommended,
particularly if you are planning to monitor a high number of ports. If you experience performance
problems or you plan to monitor a very large network, you should certainly consider this option. This
scenario offers several performance advantages, as the SolarWinds UDT server does not perform any
database processing, and it does not have to share resources with SQL Server.
If you plan to monitor 150,000 or more ports, SolarWinds recommends that you install additional polling
engines on separate servers to help distribute the work load. For more information about sizing
SolarWinds UDT to your network, contact the SolarWinds sales team or visit www.solarwinds.com. For more
information about configuring additional pollers, see "Additional Polling Engine and Web Console."
SNMP Requirements for Monitored Devices
SolarWinds UDT can monitor the performance of any SNMPv1-, SNMPv2c-, or SNMPv3-enabled device on
your network. Consult your device documentation or a technical representative of your device
manufacturer to acquire specific instructions for configuring SNMP on your device.
nTo properly monitor devices on your network, you must enable SNMP on all devices that are
capable of SNMP communications .
nIf SNMPv2c is enabled on a device you want SolarWinds UDT to monitor, by default,
SolarWinds UDT will attempt to use SNMPv2c to poll the device for performance information.
If you only want SolarWinds UDT to poll using SNMPv1, you must disable SNMPv2c on the
device to be polled.
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