[cobalt-users] IMPORTANT Double DNS entries

["manitu" <manitu@xxxxxxxxxx>]

Hello all,

a friend of mine has a problem and he told me to ask the question here.

The situation. His server is going to be moved from one datacenter to a new
one. The ips for his virtual sites as well as for the server are going to
change.

Therefore he has setup his dns so that all hostnames (e.g. www) are pointing
to the old AND the new ips, e.g.

        www.domain.com                A record                old.ip.is.here
        www.domain.com                A record                new.ip.is.here

Now he has problems but it is difficult to say if the datacenter (the old,
the move is coming in the middle of march) makes the problems or these
entries.

What I would like to know is the following. There are two entries for each
host, one with the old ip which should be working and one that is not active
yet. My intention with these double entries was that the move of the server
does not cause more outage than the offline time of the server. I hope that
always the right ip is used when accessing a site. What do you think ?

Manuel