The Replication feature does this. If you configure a query server as a 'backup' server, it downloads changes but does not read them.
On Mon, May 2, 2011 at 9:56 PM, Gaurav Shingala <gaurav.shing...@hotmail.com> wrote: > > Hi, > > Is there any way to take differential backup of Solr Index? > > Thanks, > Gaurav > > -- Lance Norskog goks...@gmail.com