According to the upgrade notes from NEWS.txt, under 2.0.0 it says: - Upgrading is ONLY supported from Cassandra 1.2.9 or later. This goes for sstable compatibility as well as network. When upgrading from an earlier release, upgrade to 1.2.9 first and run upgradesstables before proceeding to 2.0.
Can someone tell me what specifically makes 2.0.0 incompatible with versions before 1.2.9? I have a 1.0.* cluster which I am looking to upgrade to 1.2.*. Since it appears 1.2.9 is not even released yet should I be waiting to upgrade?