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by johannes1234321
2178 days ago
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Instead of Stanford as source here is an example from the FB engineering blog about migrating from HBase to MySQl for messaged in order to reach performance: https://engineering.fb.com/core-data/migrating-messenger-sto... And yes, they certainly cache data in multiple layers using different technologies but from all I as an outsider can see MySQL still seems to be their source of truth for most services. Meaning all writes go to MySQL and at least when going deep in history or doing searches (which typically can't be served from a cache) hit MySQL. |
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