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Date: Mon, 9 Jun 2014 20:51:50 +1000
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Subject: Reading a v2 index in v4
From: Trejkaz <trejkaz@trypticon.org>
To: Lucene Users Mailing List <java-user@lucene.apache.org>
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Hi all.

The inability to read people's existing indexes is essentially the
only thing stopping us upgrading to v4, so we're stuck indefinitely on
v3.6 until we find a way around this issue.

As I understand it, Lucene 4 added the notion of codecs which can
precisely choose how to read and write the index content.

So I wonder:
1. Is it technically possible to write a codec to read the v2 format?
2. If this is possible, has anyone already done it?
    (Surely we're not the first ones to want to do it.)

TX

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