Stage 1 of 7 · Model
Dropbox-Style File Sync Service: The bytes behind a sync
Use 86,400 seconds per day. The stated 2 MB average is after compression; it is deliberately a first estimate, not a claim about a production file distribution.
What you need to know
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Work it out
20 million changed files averaging 2 MB each produce how much new content per day, before deduplication?Work it out
If those 40 TB arrive evenly over a day, what average payload bandwidth does the service receive?The workload has two different costs. Small files are dominated by request, hashing and metadata overhead; large files are dominated by bytes on the wire and interruption risk. A design that treats every file as one HTTP body pays both costs badly.