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This is the 7th and final part of our blog post series on how we upgraded our Elasticsearch cluster without downtime and with minimal user impact. In this post, we will focus on several of the benefits we have seen after the upgrade and provide more details on how our architecture looks today.
Back in 2018, now five years ago, we published a blog post describing our 400+ node Elasticsearch cluster. In that post we brought up an important topic: Well, the day to upgrade finally came. A few weeks ago, we completed the last steps in terminating our old, 1100 nodes large Elasticsearch cluster and its surrounding infrastructure. At that time, all dependent applications had already been routed over to our new Elasticsearch cluster that would replace it.
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