Hello, If you can guarantee no concurrent updates while you are doing the copy, then 3rd-party tools that replicate files such as fsync are fine. But otherwise or if you have the choice, I would recommend to use Lucene's built-in support for replication, which can also work if there are concurrent updates to the index.
What is NRTLuceneReplication? I cannot find references to it. Lucene's replicator module does have NRT (near-realtime) support through: https://lucene.apache.org/core/10_2_0/replicator/org/apache/lucene/replicator/nrt/package-summary.html . On Mon, Aug 25, 2025 at 5:18 PM sandy A <santhoshmaddy1...@gmail.com> wrote: > Hi Lucene Community Team, > > I have a couple of queries related to Lucene replication and would > appreciate your guidance: > > *Query 1:* > Is it safe to use tools like *rsync* (on Linux) or *robocopy* (on Windows) > for copying Lucene segment files from one server to another? > I want to understand if there are any potential risks (e.g., partial > copies, consistency issues) or best practices recommended for such > approaches. > > *Query 2:* > I noticed that *NRTLuceneReplication* is still marked as "in development." > Could you please clarify why it is not yet considered production-ready? Are > there known limitations or stability concerns that we should be aware of > before experimenting with it? > > Any insights or suggestions would be really helpful. > > > With Regards, > SanthoshKumar A > -- Adrien
