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# Restore from a Backup File

To restore a data index to an IDOL Server, you can send a `DREINITIAL` action (case sensitive) from your Web browser, including the path to a backup file that you created by using the `DREBACKUP` index action:

    http://IDOLhost:indexPort/DREINITIAL?path

where:

`IDOLhost` | is the IP address or host name of the machine on which IDOL Server is installed.
`indexPort` | is the IDOL Server index port (specified by the `IndexPort` parameter in the `[Server]` section of the IDOL Server configuration file).
`path` | is the path to the location of the IDOL Server backup, created by using the `DREBACKUP` index action. In Windows, you can use a Unicode path.

For example:

    http://12.3.4.56:20001/DREINITIAL?E:\DataIndex_Backup

This action uses port `20001` to restore the files backed up on `E:\DataIndex_Backup` to an IDOL Server located on a machine with the IP address `12.3.4.56`.

If you create a backup by using the `HostDetails` parameter, you can restore these backups by using the `HostDetails` parameter with your `DREINITIAL`:

    http://IDOLhost:port/DREINITIAL?path&HostDetails=True

Note: When you restore from a backup by using `DREINITIAL`, IDOL Server does not reindex the data.

When you want to update a configuration parameter that requires you to reindex your data, you can use `DREEXPORTIDX` or `DREEXPORTXML` to export an IDX or XML file. You can then initialize your index, make your configuration changes, and index the IDX or XML file back into IDOL Server.

Related Topics

- Export IDX Documents from IDOL Server

- Export XML Documents from IDOL Server

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