If you kept an "indexed_time" field, you could always just index to the same instance and then do a delete by query, something like <delete><query>timestamp:[* TO NOW/DAY]</query></delete>, commit and go. That would delete everything indexed before midnight. last night (NOW/DAY rounds down).
Note, most of this would be already replaced if your new documents had the same <uniqueKey> value as the old ones, then the old ones would be automatically replaced. Best Erick On Tue, Mar 5, 2013 at 12:10 AM, 장용석 <need4...@gmail.com> wrote: > Hi. > > I want indexing all documents once a day and after indexing delete old > index files that indexed before a day. > > I think to do this, indexing all documents in new directory and replace > IndexSearcher and IndexWriter with olds, and delete old index directory. > > Is there more good indexing strategy? > > Thanks.! > > -- > DEV용식 > http://devyongsik.tistory.com >
