On Wednesday, 16 January 2013 11:06:56 UTC-5, Vitaly Zemlyansky wrote:
>
> Currently, I don't have problems. 


Oh, you've got a problem alright - and it's called "premature 
optimization". 

 

> As I wrote, I am just expecting that most problems will be with DB's. 
>

Stop expecting, and start MEASURING. Figure out how to load-test your 
application, and work from there.
 

> I read about this problems in architecture of highload projects. And I 
> know that relational model can't scale for millions 
> simultaneously requests. All projects use distributed DB for this problem, 
> like Cassandra or Riak.
>

Wow, the MySQL team at Facebook is going to be really surprised that 
they're not using MySQL:

https://www.facebook.com/notes/facebook-engineering/under-the-hood-automated-backups/10151239431923920

All snark aside, measurement is the ONLY way to solve this problem.

--Matt Jones

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