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Re: upgrading from 2.x TWCS to 3.x TWCS


Easiest approach is to build the 3.11 jar from my repo, upgrade, then ALTER table to use the official TWCS (org.apache.cassandra) jar

Sorry for the headache. I hope I have a 3.11 branch for you.


-- 
Jeff Jirsa


On Nov 2, 2018, at 11:28 AM, Brian Spindler <brian.spindler@xxxxxxxxx> wrote:

Hi all, we're planning an upgrade from 2.1.5->3.11.3 and currently we have several column families configured with twcs class 'com.jeffjirsa.cassandra.db.compaction.TimeWindowCompactionStrategy' and with 3.11.3 we need to set it to 'TimeWindowCompactionStrategy'  

Is that a safe operation?  Will cassandra even start if the column family has a compaction strategy defined with a classname it cannot resolve?  
How to deal with different versioned nodes and different class names during the upgrade of the binaries throughout the cluster?  

Thank you for any guidance, 
Brian