2nd mysqld (no replies)

Hello,

try to start a 2nd mysql-server on same machine. My current tests are working but may be some other users have some objections or see problems that may occur. This is what i did:
By /usr/sbin/mysqld --print-defaults i can see current defaults of my server
I changed in this commandline parts for datadir,socket,port,pid
The second mysqld was running without problems and i could do some operations.
Is this a feasible way or should i expect some conflicts by doing this?

Thanks,
Hans