Users Guide

• Select the desired schedule parameters.
• (Optional) You may adjust the task speed slider for faster task execution; however, more system
resources are consumed if the speed is increased.
• Discover all instrumented devices.
Related References
Discovery and Inventory Portal
Last Discovery and Inventory
Discovered Versus Inventoried Devices
Task Status
Discovery Speed Slider
This control, also known as the discovery throttle, controls how fast discovery occurs and how much
network and system resources are consumed for discovery by controlling the:
• Number of discovery threads that are allowed to run at any point of time.
• Delay in between the communicating devices during a network ping sweep, in milliseconds.
NOTE: Each tick on the throttle control equals 10% and the range is from 10% to 100%. By default, in
OpenManage Essentials, the discovery throttle is set at 60%. After an upgrade from IT Assistant, the
throttle control remains at its previously set value.
Multithreading
Dell OpenManage Essentials improves upon the optimized parallel threading implementation in the
Network Monitoring Service introduced in IT Assistant.
As the discovery process is I/O intensive, you can optimize the process by making it a parallel operation,
where threads running in parallel (known as multi-threading) send requests and handle responses to
several devices simultaneously.
The more threads that run in parallel, each communicating to a different device, the faster is the
discovery; barring overall high network congestion or latency. The discovery process, by default, allows a
maximum of 32 threads to run in parallel (or concurrently) at any one time for discovery.
To control the number of parallel threads executing, move the discovery throttle control either left or
right. When set at the maximum, 32 parallel threads are allowed to run. If the throttle is at 50%, only 16
threads are allowed to run at any one time.
As the discovery service is optimized for parallel threading operations, the system can utilize more system
resources even at the same throttle setting. It is recommended that you monitor the system resources so
that a satisfactory trade-off is made between discovery speed versus system resources available for
OpenManage Essentials. Lowering or increasing the throttle depends on the system it is running on and
the available resources. Note that the discovery service may take up to several minutes to adjust to a new
throttle setting.
NOTE: For minimal discovery times on medium to large size networks (several hundred to several
thousand devices), it is recommended that you install OpenManage Essentials services on a multi-
processor system.
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