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Elly Garnand

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Aug 2, 2024, 11:55:04 AM8/2/24

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First, I couldn't see the appeal to it: the schema-less property, that for me was one of the most recognizable characteristics of a NoSQL database, was removed with the introduction of CQL (Cassandra Query Language). And CQL is very similar to SQL.

Then, I started with the Datastax online trainings. And the beauty of Cassandra emerged. The real meaning of Cassandra exists in its distributed architecture, its clusters and nodes, its replication plans and its configurable consistency.

Practically all of Netflix analytics data was moved to Cassandra, and netflix is very open about the topic. In their technical blog they give information about their tests, their infrastructure and how they integrate with Amazon Web Services.

Datastax, the company that helped Netflix with the implementation of their Cassandra distribution has a lot of , and a full document of the advantages (according to Datastax) of Cassandra over Oracle SQL.

The cassandra nodes were started, but in the cassandra ring (using nodetool ring command) I can only see one node, which is the new node which I added. I don't see the previously setup cassandra node.

We observed the very same error message in a 51 node installation as well, having 27 CS nodes globally distributed across 9 data centers (5 locations / network zone, 4 of them having DR location, with 3 CS nodes in each location / network zone).

Any update, as we observe it still in Apigee 4.51 (without patch yet)?
Recommended way to resolve, and any option to auto-heal?
It's a huge risk for us having some hundred nodes in various stages and datacenters distributed globally...

we observed a similar error in our 9-node-installation: when we installed cassandra on node 1, it was part of the ring. When we then installed cassandra on node 2, only the second cassandra was part of the ring and the first cassandra was kicked out.