Lucene: replicated (FS)Directory implementation

Is there any alternative implementations of Lucene's (FS)Directory, notably ones related to replication? What I am looking forward to doing (but looking for something existing before implementing my own :) is a directory that writes to multiple identical directories at the same time. The idea behind is that I can't deploy DFS or SAN and thinking of a sort of a "manual" replication to another node with the minimum possible delay. Thoughts?

Many thanks开发者_如何学C!

Usually people use Solr for this. If you can't use Solr's replication functionality, you can do what people did before Solr: rsync your directories.