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From: Claudio Nanni (claudio.nannigmail.com)
Date: Thu Feb 05 2009 - 05:22:23 CST
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
This is in my concept of interface, but probably my english is lacking!
2009/2/5 John Daisley <john.daisleymypostoffice.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
> > (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
> > 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
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