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From Mike Neir <>
Subject Re: Upgrade from 1.0.9 to 1.2.8
Date Fri, 30 Aug 2013 16:41:20 GMT
In my testing, mixing 1.0.9 and 1.2.8 seems to work fine as long as there is no 
need to do streaming operations (move/repair/bootstrap/etc). The reading I've 
done confirms that 1.2.x should be network-compatible with 1.0.x, sans streaming 
operations. Datastax seems to indicate here that doing a rolling upgrade from 
1.0.x to 1.2.x is viable:

See the second bullet point in the Prerequisites section.

I'll look into 1.2.9. It wasn't available when I started my testing.


On 08/30/2013 12:15 PM, Robert Coli wrote:
> On Fri, Aug 30, 2013 at 8:57 AM, Mike Neir <
> <>> wrote:
>     I'm faced with the need to update a 36 node cluster with roughly 25T of data
>     on disk to a version of cassandra in the 1.2.x series. While it seems that
>     1.2.8 will play nicely in the 1.0.9 cluster long enough to do a rolling
>     upgrade, I'd still like to have a roll-back plan in case the rolling upgrade
>     goes sideways.
> Upgrading two major versions online is an unsupported operation. I would not
> expect it to work. Is there a detailed reason you believe it should work between
> these versions? Also, instead of 1.2.8 you should upgrade to 1.2.9, released
> yesterday. Everyone headed to 2.0 has to pass through 1.2.9.
> =Rob


Mike Neir
Liquid Web, Inc.
Infrastructure Administrator

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