On Tue, Jul 13, 2010 at 2:43 AM, Paul Prescod <p...@prescod.net> wrote: > On Mon, Jul 12, 2010 at 11:44 PM, Benjamin Black <b...@b3k.us> wrote: >> We use Cassandra (multidimensional metrics) *and* redis (counters and >> alerts) *and* MySQL (supporting Rails). Right tool for each job. The >> idea that it is a good thing to cram everything into a single database >> (and data model), beaten into everyone by years of relational database >> marketing, is not true now and never really was. Embrace diversity! > > As I'm sure you know more than most, every component in production has > an operational cost, and therefore each should be justifiable. >
Similarly, there is a cost to using a tool that is ill-suited to the task. This is the fundamental trade-off in using more specialized systems vs a general, relational store. My experience so far is the additional operational overhead is quite low, and the benefits in performance and simplicity of implementation far outweigh it. b
