Users Guide

Related links
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.
Scheduling Inventory
NOTE: It is recommended not to schedule the inventory task at the same time as the Database Maintenance Execution
Schedule, as the console is less responsive during database maintenance.
To schedule inventory:
1. Click Manage → Discovery and Inventory → Common Tasks → Inventory Schedule.
2. In Inventory Polling Configuration Settings, perform the following:
• Select Enable Inventory.
• Select the desired schedule parameters.
• (Optional) You may adjust the Inventory Polling Speed slider for faster task execution; however, more system resources
are consumed.
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