Hi John, So according to this interpretation a port IS a network interface, it means that I have thousands of network interfaces on my servers? I never thought of a port as a network interface, I always thought of it as an attribute(address of an application on the host) of the tcp/ip protocol, transported by the network interface (all the software stack, not only physical device). This is in my concept of interface, but probably my english is lacking!
Thanks Claudio 2009/2/5 John Daisley <john.dais...@mypostoffice.co.uk> > I think you are confusing a network interface (such as a tcp port) with a > physical network device (such as a LAN card). > > For me the study guide is correct. > > > > I succesfully install multiple instances on the same host since many > years > > (good old 3.23), > > my rule of the game is: different os user, different os user homedir, > > different my.cnf (with different port/socket) > > and start the server ecluding the possibility to read other than its own > > my.cnf with --defaults-file=/home/mysql-instance-x/my.cnf > > It works greatly and never had one problem (as long as you also start > > mysql > > client with --defaults-file=/correct/my.cnf) > > > > Question: Why on Certification Study Guide, Chapter 42, Page 576, First > > Bullet it states: > > > > "Each server must have its own network interface(......) it will not even > > start properly if it discovers that its network interfaces are already in > > use(...)" > > > > Even if at the end it changes the version a little bit stating: > > > > ".....can share the same hostname. They can also share the same IP > address > > as long as they listen on different TCP/IP port numbers." > > > > I find at least confusing,and I think that should be corrected, am I > > wrong? > > > > What do the masters think? > > > > Claudio > > > > > > ______________________________________________ > > This email has been scanned by Netintelligence > > http://www.netintelligence.com/email > > > > >
