The CiDaemon process is a child process created by the Index Server engine. The Index Server engine gives a list of documents to the CiDaemon process, which is responsible for filtering the documents by identifying the correct filter DLL and word-breaker DLL associated with a specific document.
Filtering is done as a background activity so as not to interfere with any foreground activity. On local drives, if a document opened by the CiDaemon process for reading is needed by another process for writing, the CiDaemon process closes the document as soon as possible. The document will be retried for filtering at a later time. (This feature is not available on network shared folders.)
If the CiDaemon process stops, it will be automatically restarted by the Index Server engine.