Distributed Action Handler 25.4
Distributed Action Handler Help

# SimpleCombinatorMode

Set `SimpleCombinatorMode` to `True` to use Content component databases, rather than virtual databases (VDBs) to distribute and merge results. In `SimpleCombinatorMode`, you cannot configure VDBs, and Distributed Action Handler sends all queries to all child servers. Distributed Action Handler forwards the `DatabaseMatch` to child servers, and merges the responses from all child servers.

If a child server stops responding for any reason (for example, a hardware failure or network outage), the Distributed Action Handler marks it as down and only assigns incoming actions to the databases in child server installations that are running. The Distributed Action Handler periodically checks child servers that are down. If it finds that a child server has come online again (for example, because the hardware has been rebooted or the network connection repaired), it adds it back into the list of active child servers and resumes sending actions to that child server.

NOTE: This configuration parameter only applies in non-mirror mode.

Type: | Boolean
Default: | False
Required: | No
Configuration Section: | Server
Example: | `SimpleCombinatorMode=True`
See Also: |

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Version 25.4 | Last updated October 2025

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Product: Knowledge Discovery Distributed Action Handler 25.4

Topic Title: SimpleCombinatorMode