(RADIATOR) Radiator and Mysql under load

[DUFOUR Geoffrey]

Hello,
 
We plan to run RADIATOR on RH Linux and authenticate users from a mysql database (accounting information will be stored in the same database). We have to work with a data model that allows us to handle "group attributes" (reply and check),  "user attributes" (reply and check), and a few other things, meaning that the AuthSelect query will deal with several tables.
 
We should have up to 50.000 users in the database and 1000 realms in the config file (1500000 CDRs a month).
 
1st question : Knowing all this, do you see any problems running RADIATOR with mysql (performance problems, ...). It seems a lot of people are working with MSSQL or Oracle databases to authenticate users. 
 
2nd question : Is it a problem for RADIATOR to handle a lot of realms, knowing all the information is kept in memory ?

I am concerned about performance.
 
Thanks for your help.
 
Regards.
 
Geoffrey Dufour
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