Quote:
Originally Posted by cc_in_oh
Speaking of SSDs, Amazon has a lightning deal on a no-name 480GB SSD for $48. Obviously not fast or reliable enough for database servers, but at $100/TB you could build in a LOT of redundancy...
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If you have the hardware support, you configure things in a RAID array. It's also possible to hot-swap.
(One of the things that impresses me about Google's architecture is that failed drives get hot swapped, and the replacement is automatically repopulated with the requisite data. Everything is stored in multiple redundant geographically dispersed locations.
A Google engineering VP gave a presentation back when with slides of an anonymous concrete block building in the boonies surrounded by fire equipment. He told the audience "I can't tell you what happened, but that was one of our facilities, and it was bad." They lost an entire data center. The only thing Google users noticed if they noticed anything al all was that queries might have taken a second or so longer.
I tell people "If a disaster capable of putting down all of Google occurs, not being able to get to Google will be the
least of your worries."
)
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Dennis