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| # Tourist Social Network - System Design | ||
| ## Functional requirements: | ||
| - registration of users | ||
| - publishing posts with images and descriptions | ||
| - viewing publications of other users | ||
| - comments on posts | ||
| - rating posts | ||
| - subscribe to other users and receive updates | ||
| - search for popular travel destinations | ||
| - feeds | ||
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| ## Non-functional requirements: | ||
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There was a problem hiding this comment. Таймингов на основные операции не хватает |
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| - DAU = 10 000 000 | ||
| - availability 99,95% (4ч23м) | ||
| - geo CIS countries | ||
| - data is always stored | ||
| - no seasonality | ||
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There was a problem hiding this comment. Есть же ярко-выраженные сезоны отпусков |
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| - no more than 1c creation post | ||
| - no limit subscribe | ||
| - max 5 images one post | ||
| - max size image 500 кб | ||
| - max 3000 desc | ||
| - max 200 title | ||
| - one post - one day | ||
| - 5 post view - one day | ||
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| ## load: | ||
| RPS(write):<br> | ||
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| <code> | ||
| 10 000 000 * 1/86 400 = 116 | ||
| </code> | ||
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| RPS(read)<br> | ||
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| <code> | ||
| max_images_in_post = 5<br/> | ||
| (10 000 000 * (6 * 5)/86 400 = 3500 | ||
| </code> | ||
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| Traffic(write)<br/> | ||
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| <code> | ||
| images = 5 * 500кБ = 2500 KБ<br/> | ||
| desc = 3000 * 4Б = 12 KB<br/> | ||
| title = 200 * 4Б = 0.8 КБ<br/> | ||
| 116*(2500+12+0.8) = 290 000 КБ/с | ||
| </code> | ||
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| Traffic(read)<br/> | ||
| <code> | ||
| 3500*(2500+12+0.8) = 8 794 800 КБ/с | ||
| </code> | ||
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| Connections<br/> | ||
| <code> | ||
| 10 000 000 * 0.1 = 1 000 000 | ||
| </code> | ||
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Я бы ленту конкретизировал - имею в виду то, как она строится