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# Compact the Data Index

You can reduce the space that the documents in the IDOL Server data index take up by running a compact operation. In this operation, new documents fill up the space that has been created through the deletion of documents (similar to defragmentation).

You can compact the IDOL Server data index

- immediately, by sending a `DRECOMPACT` action.

- at regular intervals, by setting up a scheduled `Compact` operation.

Note: You can automatically back up the IDOL Server data index whenever you send a `DRECOMPACT` action. HPE recommends that you back up IDOL Server before you compact it.

Related Topics

- Back up the Data Index Automatically

- Back up the Entire IDOL Server Data Index

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