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Posted to java-user@lucene.apache.org by yuncheng lu <lu...@gmail.com> on 2019/11/16 15:18:06 UTC

Ask About how to use NativeUnixDirectory

I see the NativeUnixDirectory in the document which  "A Directory
<https://lucene.apache.org/core/6_5_0/core/org/apache/lucene/store/Directory.html?is-external=true>
implementation
for all Unixes that uses DIRECT I/O to bypass OS level IO caching during
merging. For all other cases (searching, writing) we delegate to the
provided Directory instance"
I wonder how to use this directory while merging?
Is there any possible to use NativeUnixDirectory only in merging, and
others are FSDirectory?