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From Oleksandr Shulgin <>
Subject Re: Cassandra migration from 1.25 to 3.x
Date Mon, 17 Jun 2019 07:55:50 GMT
On Mon, Jun 17, 2019 at 9:30 AM Anurag Sharma <>

> We are upgrading Cassandra from 1.25 to 3.X. Just curious if there is any
> recommended open source utility for the same.


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!

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