How to stream a large file to 1000 hosts fastest

Q: How to stream a large file to 1000 hosts fastest

This is a System Design interview question from Anthropic for Software Engineer roles. View the full question and solution on PracHub.

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Question

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Problem

You need to distribute a very large file stored in cloud object storage to 1000 servers in a data center.

The WAN link from cloud storage → data center is bandwidth-limited (assume 1 Gb/s total into the data center).
Each server has a NIC bandwidth limit (assume 1 Gb/s per server).

Task

Design the fastest (lowest makespan) way to stream/deliver the file so that all 1000 servers obtain the full file.

Follow-up

How does your design change if some hosts have poor or unstable network (slow, lossy, frequently disconnecting)?

How to stream a large file to 1000 hosts fastest

Problem

Task

Follow-up

Solution

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