Multi-tenant SaaSSilo ops tax
Assume 500 silos, one per customer. How long does one release take?
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More questions.
Architecture stylesEventStorming
Can a wall of sticky notes tell you where to split services?
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System design trade-offsHidden state
Ten instances, one rate limit. Why is the real limit ten times higher?
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Key technologiesBlind spots
Why does “not spicy” land right beside “extra spicy”?
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Common patternsMultipart
Your upload died at 90%. How much do you send again?
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InfrastructureDuplicates
Why can’t any system promise a push arrives exactly once?
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Search & discoveryPrivacy
You and a colleague search the same words. Why must results differ?
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Storage & mediaLaunch night
A new season of a hit show goes live. Why doesn’t anything melt?
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Social & feedsPrivacy
Could a phone number introduce a psychiatrist’s patients to each other?
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Real-time & collaborationHot channels
Hundreds of thousands open one channel at once. Why doesn’t the database melt?
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Location & mapsPermissions
Asha stops sharing with you, but that message gets lost. Then what?
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E-commerce & bookingLate payments
Your bank confirms after the order expired. Do you get the phone?
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Data, analytics & monitoringHot keys
What if one hashtag aims 600k updates a second at one server?
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AI & LLM systemsSharing
Why split one H100 into seven slices for notebooks?
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Core conceptsClaim check
A 2 GB video upload. Why should your servers never see a byte?
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Networking and APIsRound trips
Why does a brand-new connection feel slow on a fast network?
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Data and storageEstimates vs actuals
Why did a planner expecting 480 rows do 48,000 index lookups?
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Caching fundamentalsVersioning
You purged the CDN. Why do phones still run last week’s JavaScript?
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Messaging and streamsRedis
Why can Redis SET NX lose a payment without a single duplicate?
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Distributed coordinationLifeguard
Why should a node suspect itself before accusing its neighbours?
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Running in productionFinal night
The food-court queue hits 40, so you call more cooks. Why’s that too late?
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Why is it slow? Performance anti-patternsDetect it
Why can 72,000 invoice inserts write a tenth of all your WAL?
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Multi-tenant SaaSSame split everywhere
AWS designs DNS answers for a 100% SLA. Why not DNS edits?
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Architecture stylesAmbassador
A ten-year-old app you can’t touch needs mTLS. Do you rewrite it?
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System design trade-offsCost
Strong reads cost twice as much. When are they worth it?
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Key technologiesStreaming
Why does a 400-token answer take 20 seconds, and nobody minds?
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