Developer & Networking5 min read
Pagination Math: How Many Pages and Offsets?
Pages = ceil(total ÷ page size). 1,037 records at 25 per page is 42 pages, and the last holds just 12. Offsets and edge cases explained.
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18 articles
- Developer & Networking5 min read
Requests Per Second and API Throughput
RPS is requests ÷ seconds, and concurrency is RPS × latency. 1.8 million hits an hour is 500 RPS, about 20 requests in flight at 40 ms.
- Developer & Networking5 min read
Projecting Storage Growth: Compound Math
Storage grows by compounding: 12 TB at 4% a month becomes 30.8 TB in 24 months and hits 40 TB in month 31. Learn the formula and the traps.
- Developer & Networking5 min read
Subnet Mask From a Prefix: How /24 Becomes 255.255.255.0
A /24 prefix means 24 leading one-bits, which is 255.255.255.0 and 254 usable hosts. Learn to convert any prefix and find the network and broadcast address.
- Developer & Networking4 min read
Uptime Percentage to Downtime: 99.9% Explained
99.9% uptime still allows 43 minutes of downtime in a 30-day month. See the 99% to 99.999% table and why chained services score lower than any single one.
- Developer & Networking5 min read
How Big Will a Video File Be? Bitrate Math
A video file is bitrate × duration ÷ 8. At 8 Mbps video plus 128 kbps audio, ten minutes is about 610 MB. Here is the math and the traps.
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