I tried IndexWriterConfig.OpenMode CREATE, and the size is doubled. The only way that is effective is the writer's deleteAll() methods.
On Mon, Jan 9, 2012 at 5:23 AM, Ian Lea <ian....@gmail.com> wrote: > If you load an existing disk index into a RAMDirectory, make some > changes in RAM and call addIndexes to add the contents of the > RAMDirectory to the original disk index, you are likely to end up with > duplicate data on disk. Depending of course on what you've done to > the RAM index. > > Sounds you want to call addIndexes using a writer on a new, empty, > index or overwrite the original. IndexWriterConfig.OpenMode CREATE. > > > -- > Ian. > > > On Mon, Jan 9, 2012 at 4:29 AM, dyzc <1393975...@qq.com> wrote: > > I'd better provide a snapshot of my code for people to understand my > issues: > > > > > > File file=new File("c:/index_files"); > > FSDirectory fsDir=new FSDirectory(file); > > RAMDirectory ramDir=new RAMDirectory(fsDir, new > IndexWriterConfig(Version.LUCENE_35, new StandardAnalyzer()); > > > > > > IndexWriter iw = new IndexWriter(ramDir, iwc); > > > > > > ......DO something here with iw (associated with ramDir)..... > > > > > > Now I am trying to synchronize ramDir with fsDir: > > > > > > //close iw prior to synchronization > > iw.close(); > > > > > > // synchronize RAM with FS > > IndexWriter writer = new IndexWriter(fsDir, new > IndexWriterConfig(Version.LUCENE_35, ik)); > > writer.addIndexes(ramDir); > > writer.close(); > > ramDir.close(); > > > > > > > > Now I end up with duplicate copies of index files in c:/index_files > > > > > > Is there something that I miss here? > > > > > > ------------------ Original ------------------ > > From: "zhoucheng2008"<zhoucheng2...@gmail.com>; > > Date: Mon, Jan 9, 2012 12:04 PM > > To: "java-user"<java-user@lucene.apache.org>; > > > > Subject: Build RAMDirectory on FSDirectory, and then synchronzing the > two > > > > > > Hi, > > > > I new a RAMDirectory based upon a FSDirectory. After a few > modifications, I would like to synchronize the two. > > > > > > Some on the mailing list provided a solution that uses addIndex() > function. > > > > > > However, the FSDirectory simply combines with the RAMDirectory, and the > size doubled. > > > > > > How can I do a real synchronization? > > > > > > Thanks > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > >