I believe that’s just referencing a counter implementation detail. If I remember correctly, there was a fairly large improvement of the implementation of counters in 2.1, and the assignment of the id would basically be a format migration.
> On Oct 20, 2017, at 9:57 AM, Paul Pollack <paul.poll...@klaviyo.com> wrote: > > Hi, > > I was reading the doc page for nodetool cleanup > https://docs.datastax.com/en/cassandra/2.1/cassandra/tools/toolsCleanup.html > because I was planning to run it after replacing a node in my counter cluster > and the sentence "Cassandra assigns a new counter ID to the node" gave me > pause. I can't find any other reference to a node's counter ID in the docs > and was wondering if anyone here could shed light on what this means, and how > it would affect the data being stored on a node that had its counter ID > changed? > > Thanks, > Paul