Sharding · Estimate
You store 60 TB of data with 3 replicas of everything, and each node can hold 4 TB. How many nodes do you need, ignoring headroom?
easy Estimation Storage
Answer
About 45 nodes. In review, anything from 30 to 67.5 counts as right.
The worked estimate
60 TB × 3 replicas = 180 TB in total. 180 ÷ 4 = 45 nodes. In practice you keep disks well below full, which makes it 60 or more.
Numbers: Numbers to know.
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