Hi Jerry.
We have moved our AIX ADSM Server to a new IP address. We changed the DNS
pointer, as you described, while we were doing the move. We made sure that all
the clients were using the ADSM DNS Name as opposed to a hardcoded IP address
prior to the move.
I have to admit that we never thought about the possiblitiy that a scheduled
client might store an IP address. We assumed that they would use the DNS name
and that the name would be resolved by the DNS server every time they attempted
access.
Anyway, it worked with no problems. There were scheduled sessions active on the
new server within minutes of the time the new server came up.
In this case, as you are well aware, the fact we are on different server
platforms should make no difference. The activities involved here are all on
the client and there is no difference in the client code for different server
platforms.
Hope your move goes well.
Paul Hilton
ISM (Alberta) Ltd.
philton2 AT isma DOT com
(403) 296-7120
To: ADSM-L @ VM.MARIST.EDU (Multiple recipients of list ADSM-L) @ Internet
cc: (bcc: Paul Hilton)
From: jlawson @ ITTHARTFORD.COM (Jerry Lawson) @ Internet
Date: 11/15/96 09:19:58
Subject: DNS and Moving Servers
Date: November 15, 1996 Time: 09:43
From: Jerry Lawson
ITT Hartford Insurance Group
(860) 547-2960 jlawson AT itthartford DOT com
-----------------------------------------------------------------------------
We will be moving our server from one MVS machine to another next month. As
We will be moving our server from one MVS machine to another next month. As
we plan, one question came up about clients reconnecting to the server after
we have moved it. Most of our clients use TCP/IP and Domain Name Services
(DNS) to contact the server.
The question we had was: If a client has a scheduled session established with
a server, and used DNS to contact the server via the name ADSM, if we move the
server to another location AND change the DNS pointer for ADSM to point to the
new location, will client sessions be reconnected when the server comes back
online? In other words, is the client always going through DNS to contact the
server, and thus will find it after the move, or does DNS return the current
address, and ADSM then use this to contact the server. This later possibility
would mean that the scheduler would have the "old" address, and no possibility
of reconnecting until the scheduler was stopped and restarted.
*****************************************************************************
Jerry Lawson
ITT Hartford Insurance Group
jlawson AT itthartford DOT com
|
