alt Hacker NewsI think the question is probably more along the lines of - why not do a database with 100 TB of storage/records instead of a cache? tomato / tomato.. especially with smart caching in front of database. 100TB of flash is a good bit cheaper than 100TB of memory
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pocksuppet • yesterday at 9:41 PM
It's not 100TB of data. It's probably 50 GB of data on each of 2000 servers. Because it's a cache. What is the point of a central cache if it's as slow to access as the original data?
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fc417fc802 • yesterday at 7:51 PM
I'm no expert but presumably all of throughout, latency, and churn. DNS is approximately a giant KV store where the typical record has a TTL of ~5 minutes.
robotresearcher • yesterday at 8:25 PM
This is smart, task-specific caching in front of database.
Because it would be slower and have different scaling requirements than the ones they want.