Upgrade steps to address CASSANDRA-4411

[Randy Fradin <ra...@gmail.com>]

I have a question about the steps listed in this article for addressing
CASSANDRA-4411 <https://issues.apache.org/jira/browse/CASSANDRA-4411> in an
upgrade from a version <= 1.1.3 or to a version >= 1.1.5 when using leveled
compaction: http://www.datastax.com/docs/1.1/install/upgrading#upgrade-steps

It suggests first upgrading the entire cluster, then shutting down the
nodes one-at-a-time and running sstablescrub on each. My question is, why
wouldn't I just run the sstablescrub as I am upgrading each node in the
first place? In other words, can I just shut down my pre-1.1.3 node, run
sstablescrub, then start 1.1.5+, one node at a time? Is it necessary to
have already started the new version of Cassandra at least once for the
scrub to work?

Thanks