# RebuildEngine

The ID of one or more child servers that you want to rebuild from replicas. You can use this option to rebuild a lost server from the replica backups of virtual nodes without having to reindex your whole system.

You can find the ID of a child server by using the GetStatus action.

When you have more than one replica configured in your system, you can use `RebuildEngine` to rebuild more than one child server. In this case, set `RebuildEngine` to a comma-separated list of IDs.

NOTE: The child servers that you want to rebuild must not be in more distinct engine groups than the number of replicas (for example, if you have three replicas, you can rebuild child servers from no more than three engine groups).

If you use mirrored engine groups, it might be easier to restore a missing child server from its mirror, rather than by using `DREREDISTRIBUTE`.

Actions: | DREREDISTRIBUTE
Type: | String
Default: |
Example: | `RebuildEngine=1`
See Also: | Action

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