Some Flanker Doubts

Hi all

I am looking for recent Flanker news and although I’ve been looking for that, I cannot find much informations regarding the current Flankers news. I hope someone can help me:

How many Su-27SMs are in service today in the RuAF? When the PAK-FA be ready to service, they will replace all the Su-27s? I mean, Su-27Bs and SMs. Or only Flanker-Bs? When the PAK-FA will entry into service? The last data I could find is 2010.

Thanks in advance