Disk Sizing Considerations
Effective disk management is crucial:
- Low Watermark (85%): Stops new shards from being allocated to a node, though existing shards can still grow.
- High Watermark (90%): Triggers shard relocation to other nodes, which can strain resources.
- Replicas: Each replica requires additional storage equivalent to the primary index, impacting overall disk usage.
- Sharding: Optimal shard size varies; larger shards can be more storage-efficient, but finding the right balance is essential.
Consider how resilient your cluster needs to be to node failures and plan your shard allocation and disk usage accordingly.
Elasticsearch Performance Tuning
As your Elasticsearch cluster grows and your usage evolves, you might notice a decline in performance. This can stem from various factors, including changes in data volume, query complexity, and how the cluster is utilized. To maintain optimal performance, it’s crucial to set up monitoring and alerting systems that can preemptively highlight issues, allowing you to manage maintenance effectively.
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