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# Administer the Data Index

You can use the following index actions to administer the IDOL Server Data index:

DREBACKUP | Backs up the IDOL Server data index.
DRECOMPACT | Compacts the IDOL Server data index.
DREDUPLICATE | Removes or tags duplicates in the IDOL Server data index.
DREFLUSHANDPAUSE | Prepares IDOL Server for a snapshot (hot backup).
DREINITIAL | Resets the IDOL Server data index.
DREQUERYSUMMARYMANAGEMENT | Updates the query summary stop phrase list or white list.
DREREDISTRIBUTE | Redistributes content when you update the child server architecture.
DREREGENERATE | Regenerates one or more data indexes.
DRERESIZEINDEXCACHE | Dynamically resizes the index cache.
DRESPELLCHECKCACHE | Controls the spell check correction cache.
DRESYNC | Flushes the index cache to disk.
DREVALIDATE | Validates specified Content sub-indexes.

Note: Index actions are case sensitive and can be sent only by IndexClients. All index actions must be sent to the DIHPort.

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