Re: Queries on Lucene Replication Approach

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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/replicat=
or/nrt/package-summary.html
.

On Mon, Aug 25, 2025 at 5:18=E2=80=AFPM sandy A <[email protected]=
m> 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? A=
re
> 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
>


--=20
Adrien

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