Q:

Upgrading Cassandra from 2.2 to 3.0 in RHEL

I have a RHEL 7.0 server running Cassandra 2.2.3 which I tried to upgrade to 3.0. When I run yum update it showed me there is a new version of Cassandra for update, and upgraded the server to 2.2.4-1, but not 3.0.
Now if I search yum for dsc30 I can find it, and presumably I can install it too, but why the automated upgrade doesn't happen from 2.2 to 3.0?
I've got a lot of data on my server and don't want to experiment on it. I had another test server which was running Ubuntu 14.04 and that one upgraded from 2.2 to 3.0 just fine, but on RHEL my server can't find upgrade to 3.0
Thanks

A:

It's a different application and you can have 2.* and 3.* in parallel. Use
yum install dsc30

to install version 3.
If you want to upgrade your current installation then follow the steps described here

