Custom Lucene Sharding with Hibernate Search [closed]

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Has anyone experience with custom Lucene sharding / paritioning using Hibernate Search?

The documentation of Hibernate Search says the following about Lucene Sharding :

In some cases, it is necessary to split (shard) the indexing data of a given entity type into several Lucene indexes. This solution is not recommended unless there is a pressing need because by default, searches will be slower as all shards have to be opened for a single search. In other words don't do it until you have problems :)

Has anyone implemented sharding in such a way for Hibernate Search that also queries can be target to one of the shards?

In our case we have Lucene queries that should target only one shard per query.