Script-based vs Scanner-based Discovery
Universal Discovery performs inventory discovery using the following discovery methods.
Note
- Selecting a discovery method depends on your organization's policy and business goals.
- More than one discovery method can be used.
Script-based discovery
This type of discovery was originally implemented in DDMA.
Script-based discovery is often called "agentless" because it is typically implemented without agents installed on remote nodes. However, it is possible to run these jobs with a Universal Discovery Agent installed.
This type of discovery is best suited for organizations where deployment effort must be minimal, footprints on remote nodes are a primary concern, and information about running software is critical.
Scanner-based discovery
This type of discovery was originally implemented in DDMI.
Scanner-based discovery uses a software component called the Scanner- an executable file that runs on the remote node. The Scanner is deployed to remote machines and runs according to a schedule that you configure. It can run automatically using Activities, or run manually.
Scanner-based discovery is best suited for organizations where a high degree of details about installed software and hardware is needed.
Script-based vs Scanner-based Discovery Comparative Matrix
| Attribute/Discovery Method | Script | Scanner |
|---|---|---|
| Deployment Component | None | Executable file |
| Connection Method | Agent or Agentless | Agent or Agentless |
| Execution Methods | Automatic (Activities) or Manual | Automatic (Activities) or Manual |
| Discovery Method | APIs | Executable file (Scanner) |
| Scan Type | Specific data sets | Entire file system |
| Information Collected | Running software | Installed software, Hardware |
| Information Detail | Moderate | High |
| Performance Impact on Node | None | Minimal |
| Scalability | High. Discovery job quickly triggers subsequent jobs. | Minimal. Scanning job must wait to finish before triggering subsequent jobs. |
| Footprint on Node | None | Minimal |
For details on Universal Discovery Agents, see Universal Discovery Agent Overview.
For details on Scanners, see Inventory Discovery Scanners.
