I was rewriting it at the same time too.

I merged your changes as best I thought to come up with this:

Important Bayes Change
----------------------

Beyond the ability to use redis as a Bayes backend server, Bug 5185 changed
the way that message IDs were calculated for emails.

Because of this change, if you use Bayes and you are upgrading from a version
prior to 3.4.0, you should be consider wiping your database tokens and
starting fresh.

However, this is not mandatory.  If you choose to keep your current database
tokens, these are the ramifications:

1 - If you re-process emails that have already been learned before, it will
    create duplicate entries because of the new msg_id format.  The duplicates
    will expire, eventually, and should cause minimal impact unless it occurs
    frequently.

2 - If you try and unlearn or reclassify an email processed prior to the
    upgrade, the system will be unable to do so because of the new msg_id
    format. If unlearning a message is important, consider just clearing your
    Bayes store and starting from scratch.


On 6/19/2013 12:45 PM, Mark Martinec wrote:
I may tweak the PROPOSED-3.4.0.txt a little today,
need to check the Changes log.
Excellent.
Committed a first round of edits on PROPOSED-3.4.0.txt, mainly
dealing with a Redis backend. Please edit/revise to will...

Some more is to come probably...

  Mark


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