Capacity Planning - Help Required!

High-Velocity Elasticsearch Cluster Setup

Few Requirements:
Ingestion capacity: 1TB per day
Retention: 7 days
Events: 100000 events per second per day

How many nodes (master/data/ingestion/co-rdinating) required?
How much RAM and Heap required?
How much Disk Space required?
Do I need to change thread pool sizes?
Any other performance tuning for high search and write?

Welcome!

May I suggest you look at the following resources about sizing:

https://www.elastic.co/elasticon/conf/2016/sf/quantitative-cluster-sizing

And https://www.elastic.co/webinars/using-rally-to-get-your-elasticsearch-cluster-size-right

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