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From François Langelier <f.langel...@gmail.com>
Subject Re: 0.7 -> 0.8 Protocol Upgrade in production environments
Date Tue, 21 Jan 2014 22:38:11 GMT

I'm also in the process to upgrade from 0.7 to 0.8. WIth the informations I
found, your best friend is here :
It's a migration tool from 0.7 to 0.8.

You will have to install 0.8 while you still have you 0.7 running. When
those and your 0.8 consumers run, you will have to lunch the migration tool
that will consume your 0.7 message to produce them to your 0.8 environment.
When all your message will be transfer to your 0.8, you will them be able
to transfer your 0.7 producers to your 0.8 environment.

A picture is worth 1000 words :
[image: Inline image 1]

So for you b) , yes it's possible, but as far as I know, you will need to
have a tool to verify the duplication of your message because some message
will probably be consume in 0.7 and 0.8 while you are migrating because the
offsets are incompatible between 0.7 and 0.8...

c) yes if you use the migration tool

François Langelier
Étudiant en génie Logiciel - École de Technologie
Capitaine Club Capra <http://capra.etsmtl.ca/>
VP-Communication - CS Games <http://csgames.org> 2014
Jeux de Génies <http://www.jdgets.com/> 2011 à 2014
Argentier Fraternité du Piranhas <http://fraternitedupiranha.com/> 2012-2014
Comité Organisateur Olympiades ÉTS 2012
Compétition Québécoise d'Ingénierie 2012 - Compétition Senior

On Tue, Jan 21, 2014 at 12:48 PM, Clark Breyman <clark@breyman.com> wrote:

> I'm curious what the recommended best practice is for migrating a
> production environment with replication from 0.7 to 0.8 given the protocol
> upgrade. Some specific questions I have are:
> a) Is it possible to mix 0.7 and 0.8 servers for a given partition during
> the migration?
> b) If we can't mix server versions, how do we do a zero-downtime upgrade?
> c) Will 0.7 clients continue to communicate correctly on-the-wire with the
> 0.8 server until they can be upgraded?
> Any war stories of production upgrades would be helpful. Thanks in advance.
> - Clark

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