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Re:"I trust Redis-on-disk every day less." --Salvatore by zwischenzug on Wednesday June 01, 2011 @04:44AM (#2606539)
The former. I think most sane serious dbs cache and manipulate recently-used data in memory (in addition to the logical log).

Bad idea or no, it's what they do - performance gains are large. There is an ersatz logical log in the form of application logs, and these have been used to piece together transactional information before.

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