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A comment on MongoDB vs Redis, a different interpretation of what's wrong with Relational DBs. Parent comment

Re:MongoDB vs Redis, a different interpretation of what's wr... by eelco on Thursday June 04, 2009 @08:59AM (#641288)
Yes, but consider the Prevalent Hypothesis (http://prevayler.org/wiki/Prevalent%20Hypothesis):

"That all your business data fits in the RAM you can afford"

I believe this is true in many, not say most, cases. If not, don't use an in-memory "database", "persistent cache", "prevalence layer", or whatever you want to call it.

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Re:MongoDB vs Redis, a different interpretation of what's wr... by moe on Thursday June 04, 2009 @10:48AM (#641461)
Sorry, but that's the most idiotic hypothesis I've heard in a while. ;-)

Being able to guarantee that all your data will always fit in as much RAM as you can afford is a luxury that almost nobody has. There's still an order of magnitude between common disk and DIMM sizes.

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