Balancing primary and replica shards in Elasticsearch
How Elasticsearch decides where shards live, why an uneven spread of primaries matters less than it looks, and the settings I reach for when one node runs hotter than the rest.
Notes from production, and from the stage.
Software posts are field notes on the systems I run every day: Elasticsearch, Cassandra, Kafka, RabbitMQ. What broke, what I changed, and the numbers before and after. Music posts are about guitar, gear and playing live.
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