Best practices

Steps to perform before upgrading Cassandra.

Follow these best practices before upgrading Cassandra:

Take a snapshot of all keyspaces before the upgrade.
This allows you to rollback to the previous version if necessary. Cassandra is able to read data files created by the previous version, but the inverse is not always true. Taking a snapshot is fast, especially if you have JNA installed, and takes effectively zero disk space until you start compacting the live data files again.
Check NEWS.txt for any new information about upgrading.
News.txt is on the Apache Cassandra github site.
Familiarize yourself with changes and fixes in this release.
A complete list is available in CHANGES.txt.

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