You can always index into RAMDirectory for speed then synchronize those
changes to the disk by adding the RAMDirectory to a FSDirectory at some
point. Here is a simple example of how to do that:
public void save( RAMDirectory ram, File dir ) {
FSDirectory fs = FSDirectory.open( dir );
IndexWriter writer = new IndexWriter( fs, ... );
try {
writer.addIndexes( ram );
} finally {
writer.close();
}
}
http://lucene.apache.org/java/3_3_0/api/core/org/apache/lucene/index/IndexWriter.html#addIndexes(org.apache.lucene.store.Directory..
.)
On Sat, Dec 31, 2011 at 3:37 PM, Cheng <zhoucheng2...@gmail.com> wrote:
> Hi,
>
> Suppose that we have a huge amount of indices on hard drives but working in
> RAMDirectory is a must, how can we decide which part of the indices to be
> loaded into RAM, how to modify the indices, and when and how to synchronize
> the indices with those on hard drives?
>
> Any thoughts?
>
> Thanks!
>
