HFileV3's layout interms of the block indexes, blooms, the HFileBlock
layout everything remains the same as in V2.  The only difference is that
as the KeyValue format supports Tags (An arbitrary metadata) that can be
attached with the KeyValue, the same should  be perisisted in the HFiles
V3 basically allows the Tags in the HFiles and some additional FileInfo
related info indicating the presence of Tags.  So if your data does not
have Tags then you are very much using V2 way of HFiles only.and there
should not be any difference in terms of the working and performance.

On Fri, Jun 13, 2014 at 6:47 AM, Ted Yu <[EMAIL PROTECTED]> wrote:

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