sharding

ElasticSearch: Unassigned Shards, how to fix?

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I have an ES cluster with 4 nodes: number_of_replicas: 1 search01 – master: false, data: false search02 – master: true, data: true search03 – master: false, data: true search04 – master: false, data: true I had to restart search03, and when it came back, it rejoined the cluster no problem, but left 7 unassigned shards … Read more

Database sharding vs partitioning

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I have been reading about scalable architectures recently. In that context, two words that keep on showing up with regards to databases are sharding and partitioning. I looked up descriptions but still ended up confused. Could the experts at stackoverflow help me get the basics right? What is the difference between sharding and partitioning ? … Read more