# UpdateOnly

Type `true` to designate a child IDOL server as an archive server. An archive server is enabled for update only, it receives document updates but does not receive new documents.

NOTE: You cannot use this option when MirrorMode is set to `true`, or when you use the DistributeByFields, DistributeByReference, or RoundRobinMode distribution modes. For more information about the compatible options for distribution modes, refer to IDOL Expert.

NOTE: If all children are marked as `UpdateOnly`, the DIH cannot process any `DREADD` or `DREADDDATA` index actions, because there are no servers it can send new documents to. In this case, the DIH pauses index queue processing until one or more child servers are reconfigured to set `UpdateOnly` to `False`, for example by using the EngineManagement action.

You can use only a single value for `UpdateOnly`, even if you create a server group by specifying a comma-separated list of host names in the Host parameter, because the child servers in a group must be mirrors.

Type: | Boolean
Default: | False
Required: | No
Configuration Section: | IDOLServer`N` or DIHEngine`N`
Example: | `UpdateOnly=True`
See Also: |

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