On Mon, Jun 17, 2019 at 9:30 AM Anurag Sharma <anurag.rp.sha...@gmail.com> wrote:
> > We are upgrading Cassandra from 1.25 to 3.X. Just curious if there is any > recommended open source utility for the same. > Hi, The "recommended open source utility" is the Apache Cassandra itself. ;-) Given the huge difference between the major versions, though, you will need a decent amount of planning and preparation to successfully complete such a migration. Most likely you will want to do it in small steps, first upgrading to the latest minor version in the 1.x series, then making a jump to 2.x, then to 3.0, and only then to 3.x if you really mean to. On each upgrade step, be sure to examine the release notes carefully to understand if there is any impact for your cluster and/or client applications. Do have a test system with preferably identical setup and configuration and execute the upgrade steps there first to verify your expectations. Good luck! -- Alex
