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From Jonathan Ellis <>
Subject Re: cassandra upgrade strategy
Date Tue, 06 Oct 2009 21:42:08 GMT
So far, it looks like the next version after 0.4 will meet our goal of
being 100% compatible.

If there are incompatibilities introduced in a future version after
that (which is likely) then it will probably be


On Tue, Oct 6, 2009 at 4:37 PM, Jurijs Girtakovskis
<> wrote:
> Hi,
> What would be the direction to take as far as preparing for future cassandra
> updates? My understanding is that there were changes between 0.3 and 0.4
> that required extra work to port (some?) data from older format, please
> correct me if I'm wrong. If that's the case and/or if that is a possibility
> in future, then what would be the right approach to take for those
> considering Cassandra 0.4 for production?
> I currently see three possibilities:
>        1. That will never happen - formats will always stay compatible and
> newer version will be able to take older data and use it. Nothing to do for
> me.
>        2. That may happen, but if it does, there will be a conversion
> utility (built-in or standalone) taking care of upgrade. Nothing to do for
> me, other than running upgrade tool.
>        3. That may happen, and if it does data conversion must be performed
> using custom tools. Custom upgrade tool needed.
> Thank you in advance for your constructive feedback and/or pointers to
> resources that lead to answers!
> -JG

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