CODEWITHSUNDEEP
cassandra
DevLounge
DevLounge

Reputation: 8437

Add Cassandra 2.1 nodes to a Cassandra 1.2.15 cluster?

Is it possible to extend an existing Cassandra 1.2.15 cluster by adding Cassandra 2.1 nodes to it? The idea, here, is to be able, via another new software, to access the data produced by the one using 1.2.15.

I haven't yet been able to find the answer on the web.

Upvotes: 1

Views: 286

Answers (1)

Aaron
Aaron

Reputation: 57748

I don't recommend this. As stated in the DataStax Upgrade Guide (section titled "Version Restrictions") Cassandra 2.1 is not sstable-compatible with any 1.x version. By doing so, you'll be putting your cluster into what is known as an "upgrade state," and subject to the following restrictions:

  • Do not run nodetool repair.
  • Do not use new features.
  • Do not issue these types of queries during a rolling restart: DDL, TRUNCATE.
  • Do not change security credentials or permissions.

If you want to run 2.1, you should upgrade. Of course, (as per the first document I mentioned above) you'll need to upgrade your 1.2 nodes to 2.0.7 first, and then upgrade them to 2.1. Check the DataStax documentation for upgrade instructions.

Although, you might have to augment some of that, because DataStax has not published a community version of 2.1 yet (I think they're still on 2.0.10), so you'd have to grab 2.1 from the project site itself.

EDIT-

A DataStax community version of Cassandra 2.1 was made available for download last night.

Upvotes: 2

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