Hi,

Maybe there is some misunderstand about MMapDirectory and Directory for me. But when I go through the MMapDirectory source code, I find that the IndexOutput for it uses which wraps the FileOutputStream. Since we get the MappedByteBuffer when we try to read the index file, Can we shared that ByteBuffer to make write operation more efficient ? I know the sharing between write and read operations would make it more complex, but I just want to whether it is better option for MMapDirectory.

If there is some problem, please feel free to tell me. Thank you.

BR.
Yanjiu

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