Data and storageClock skew
Both writes said “success”. Why did the newer one silently vanish?
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More questions.
Data and storageReads vs writes
Writes are drowning your primary. Why won’t more replicas help?
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Data and storageNo false negatives
A Bloom filter stores no keys. So how can it say “definitely not”?
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Data and storageThe intuition
Your rarest number plate today ended in 000. How many autos passed?
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Data and storageBoundary problem
Two points 110 m apart in Mumbai. Why do their geohashes barely match?
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Data and storageNumbers decide
350 orders a second, 40,000 rider pings. Why do they live apart?
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Data and storageHidden functions
There’s an index on email. Why does lower(email) still scan every row?
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Data and storageTwo-phase commit
Why does a commit spanning two 99.9% databases cost 43 extra minutes a month?
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Data and storageEngine defaults
Both call it REPEATABLE READ. Why does only MySQL lose your update?
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Data and storageLogical first
How do you test sharded queries before moving a single row?
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Data and storageWrite-ahead log
COMMIT says ok, but your row isn’t in its table file. Why?
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Data and storageBM25
A seller stuffs “kurta” twenty times into a title. Why does it barely help?
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Data and storageDeadlocks
Two transfers lock the same two accounts. Why do both wait forever?
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Data and storageKinds of search
One Bazaar search box. How many kinds of search run behind it?
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Data and storageCompression
Why does squeezing a search index smaller make every query faster?
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Data and storageTranslog durability
Power fails 8 s after the last commit. Which acknowledged writes survive?
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Data and storageVectors
Same 50 million embeddings: 42.4 GB in one engine, 268.8 GB in another. Why?
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Data and storageRecovery
A node reboots for a patch. Why doesn’t it copy 25 GB back?
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Data and storagePageRank
One page has three inbound links, another just one. Why do they nearly tie?
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Data and storageFreshness
Search shows ₹449 at once. Why does “under ₹500” miss it for seconds?
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Data and storageGitHub
Why is a file copied into a thousand forks indexed only once?
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Data and storageWrite scale
A billion chat messages a day. Does that finally earn you Cassandra?
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Data and storageGap locks
Same FOR UPDATE, same insert. Why does only MySQL make it wait?
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Data and storageEmbedded
Why does SQLite say its rival is fopen(), not database servers?
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Data and storageCompression
How can a million city names fit in about 100 bytes?
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Data and storageEmbedding
Why can’t you embed every order inside the user’s document?
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