> From: [EMAIL PROTECTED] > > It looks like Lucene supports concurrent searchs as long as > the index is not > modified with add, delete, or optimize actions (and maybe > others?).
Searches may be made at any time, including while the index is being modified by the add, delete and optimize operations. > For those > actions, it is not clear what is happening (at least for me) with open > searchers, readers and writers. Can those be reused freely ? > When should they be opened/closed ? Searchers and readers may be used freely until they are closed. A single searcher and reader may be shared by many threads, conducting concurrent searches. That is in fact recommended. A reader will close itself when garbage collected, so don't worry about explicitly closing readers (unless you are near yout file descriptor limit). Only a single writer should exist at once. Readers opened after it is closed will see the changes made to it. > Can I add/delete documents while another > thread is looping on > Hits ? Yes. > A brief summary of what can/cannot be done when modifying an > index (and related > issues) would be very appreciated. The prohibitions are: - don't use a reader/writer after it has been closed; - don't try to write simultaneously from different processes Doug -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
