There's a difference between a second node name and an alias.

An alias is a DNS (or other) entry that points to another "name"

F'rinstance...

I have a master server with hostname "master" but the network interfaces
are called master-eth0 and master-eth1


In DNS I have
192.168.100.1   master-eth0
192.168.100.2   master-eth1

I also have an alias for "master" that points to master-eth0

All of my backup clients need to have master-eth0 and master-eth1 listed
as their backup servers...not "master".

This is because, when the client sees a backup request, it comes from
192.168.100.1, and then it performs reverse DNS lookup, and the name
resolves to "master-eth0"...so this must be the name it has in it's
bp.conf. we have no IPs in DNS that reverse to master, so while it is
the hostname of the machine, (and the hostname of the DR standby master)
it doesn't correlate to any IPs....makes it very portable for us if we
need to move to new hardware. We can have 10 backup masters all running
with the same "hostname" of "master", but the name doesn't exist on the
network, or in any naming scheme, except as an "alias" or a pointer in
DNS, so that we don't have to type in the "-eth0" when telnetting to the
machine, or launching the java GUI.

I can also take the catalog backup from this machine and restore it on
another machine with the same hostname.....quite convenient.

Paul

-- 


> -----Original Message-----
> From: veritas-bu-bounces at mailman.eng.auburn.edu 
> [mailto:veritas-bu-bounces at mailman.eng.auburn.edu] On Behalf 
> Of Hillman, Eric
> Sent: September 29, 2006 12:44 PM
> To: veritas-bu at mailman.eng.auburn.edu
> Subject: Re: [Veritas-bu] Client Hostnames
> 
> 
> Thanks for all of your replies.  This has been a very interesting and
> helpful thread.  I may have found one issues when using 
> aliases however.
> Can anyone confirm that you CANNOT use an alias of the server 
> name when
> backing up an Exchange server/cluster?  From what I'm reading, the
> netbackup client needs to reference the Exchange application using the
> actual hostname used when installing Exchange in order to successfully
> access the specified storage groups.  This would mean that the actual
> hostname of the box needs to be added to the Netbackup Policy 
> and not a
> "-backup" hostname.  Hopefully, this would be the only case that an
> alias cannot be used.  Thanks!
> 
> -----Original Message-----
> From: veritas-bu-bounces at mailman.eng.auburn.edu
> [mailto:veritas-bu-bounces at mailman.eng.auburn.edu] On Behalf Of David
> Rock
> Sent: Thursday, September 28, 2006 11:19 AM
> To: veritas-bu at mailman.eng.auburn.edu
> Subject: Re: [Veritas-bu] Client Hostnames
> 
> * Bobby Williams <bobbyrjw at bellsouth.net> [2006-09-28 05:47]:
> >  
> > About the FQN's, we don't use them.  Why type all of those extra
> characters?
> > Our DR strategy is to carry our offsite tapes to one of our other 
> > sites and do our recovery.  Without using FQN's, we just bring a 
> > development box back up as a lost production box and put it in the
> domain of the DR site.
> 
> Depends on environment.  We have a shared NBU infrastructure 
> that backs
> up multiple client environments, therefore we have the 
> potential problem
> of two different clients with the same short name.
> 
> --
> David Rock
> david at graniteweb.com
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