Re: [Networker] Need help in DDS

Hi

I think this should work if:

Normally:
o Server A is the NetWorker, Server B is a storage node, and they are
configured to see only the new library, and jbconfig is run to support this.

Also:
o Server B has NetWorker server software installed, and jbconfig is executed
to configure just the old library.  Note: the NetWorker server processes
would only be started when a restore of the old data needed to be done.

The same version of NetWorker software should be used throughout this
environment.  Also, when a restore of old data needs to be done, before
NetWorker Server software is started on Server B, Server A's configuration
should be modified to disable Server B (so that Server A does not try to
communicate with nsrmmd processes on Server B).

So, you are not sharing any tape library between NetWorker servers; server A
is the only NetWorker server controlling the new library, and server B is
the only NetWorker server controlling the new library.

Does this help?

Thanks
tl

Terry Lemons
CLARiiON Application Integration Engineering
        EMC²            
where information lives

4400 Computer Drive, MS D239
Westboro MA 01580
Phone: 508 898 7312
Email: Lemons_Terry AT emc DOT com

-----Original Message-----
From: Lee Hwan Meng [mailto:hwanlee AT SOFTHOME DOT NET]
Sent: Monday, August 19, 2002 6:01 PM
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: Re: [Networker] Need help in DDS


Well, maybe I should explain further.

Ideally, I would prefer _both_ server A and server B to be Networker servers
_and_ storage nodes. server A will contain index to new backup jobs, while
server B will retain index to old backup jobs:

- server B: attached to old (SCSI) and new (SAN) libraries. (Originally)
networker server for the old library. Storage nodes for both old and new
libraries.

- server A: attached to new (SAN) library. Configured as networker server
and storage node for the new library.

In the above setup, (ideally) I can backup servers A and B to new library
using server A as a new Networker server. At the same time, I would like to
be able to restore old data to server B (hence the need for server B to
remain as a networker server).

The problem arises (the irritating messages appear) when server A was
configured as a networker server for the new library while server B was
still serving as a networker server for the old library (since you now have
2 networker servers in the above environment).

What I don't understand is why is it that this cannot be done as I am not
sharing any library here?

Sorry for the confusion.

Regards
Hwan Meng







> -----Original Message-----
> From: Wes Ono [mailto:wono AT legato DOT com]
> Sent: Tuesday, August 20, 2002 2:38 AM
> To: 'Legato NetWorker discussion'; 'Lee Hwan Meng'
> Subject: RE: [Networker] Need help in DDS
>
>
> Hold on.  I'm confused.
>
> In an earlier mail, you mention that server A is a NetWorker server, but
> server B is a storage node.  However, the NetWorker server is complaining
> that a NetWorker server cannot be used as a storage node.
>
> It sounds as if the NetWorker server software was installed on
> server B, but
> you're trying to set it up as a storage node.
>
> If you want server B to be a storage node, then:
> - shut down the NetWorker server software on server B
> - remove the NetWorker software from server B
> - reinstall NetWorker specifying client and storage node.  Do not load the
> NetWorker server software.
>
> Now set up the new library by running jbconfig on the server that will be
> controlling the robotics on the new library.
>
> Hope this helps,
>
> Wes
>
> -----Original Message-----
> From: Lee Hwan Meng [mailto:hwanlee AT SOFTHOME DOT NET]
> Sent: Sunday, August 18, 2002 8:38 PM
> To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
> Subject: Re: [Networker] Need help in DDS
>
>
> In my environment, I have one old library attached to server A;
> now the new
> library arrives and attached to server B. I want Server A to see the old
> library as well as server B to see new library at the same time.
> No library
> is being shared here. However, Networker disallowed this upon detecting 2
> nsrd running in the network. Why is this so?
>
> Maybe this acts as a safety catch. Networker conveniently assumes some 2
> servers are sharing one library when it detects 2 nsrd running, no?
>
>
> On Fri, 16 Aug 2002 08:39:48 -0700, Wes Ono <wono AT LEGATO DOT COM> wrote:
>
> >SAN is not relevant to this problem.  The issue is that one NetWorker
> server
> >cannot act as a storage node for another NetWorker server.
> NetWorker would
> >behave the same way in a non-SAN environment.
> >
> >You CAN have more than one NetWorker server in a SAN.  If you
> want the two
> >servers to share a library, then you need AlphaStor or SmartMedia.
> >
> >Hope this helps,
> >
> >Wes
> >
> >-----Original Message-----
> >From: Lee Hwan Meng [mailto:hwanlee AT SOFTHOME DOT NET]
> >Sent: Friday, August 16, 2002 7:22 AM
> >To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
> >Subject: Re: [Networker] Need help in DDS
> >
> >
> >Well, not really. In a SAN environment, the backup server would
> complain if
> >it discovers another storage node running nsrd daemon. The recurring
> >irritating and unhelpful message goes like:
> >
> ><time> <backup server> root: [ID 702911 daemon.notice] NetWorker media:
> >(notice)check storage node: <storage node> (a server cannot be a storage
> >node)
> >
> >I am not too sure why you cannot have >1 backup server in a SAN
> (though you
> >can have another backup server OUTSIDE SAN but in the same
> backup LAN). The
> >only reason I can think of is maybe this prevents a mix-up in backup
> >indexing when you do backup from one of the backup server to the other
> >backup server-connected tape library. However, if you specify
> the '-s' flag
> >in save, there won't be any confusion.
> >
> >
> >
> >On Fri, 16 Aug 2002 11:31:08 +0200, =?iso-8859-1?Q?Bj=F6rn_Lundstr=F6m?=
> ><bjorn.lundstrom AT PROACT DOT SE> wrote:
> >
> >>Hi,
> >>
> >>you can have as many backup servers and tape libraries as you want in a
> SAN
> >>environment.
> >>
> >>I think what you really are talking about is sharing a tape library
> between
> >>backup servers,
> >>is that right ?
> >>
> >>In case that is what you want to do Legato offers this with their
> >products ,
> >>SmartMedia and AlpaStor.
> >>
> >>///Björn
> >>
> >>-----Original Message-----
> >>From: Matts Nilsson [mailto:matts_nilsson AT YAHOO DOT COM]
> >>Sent: den 16 augusti 2002 10:57
> >>To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
> >>Subject: Re: [Networker] Need help in DDS
> >>
> >>
> >> A bit off topic, but why isn't it possible to have
> >>more than one backup server in a SAN?
> >>
> >>// Matts
> >>
> >> --- Lee Hwan Meng <hwanlee AT SOFTHOME DOT NET> skrev: > In
> >>any case, in a SAN environment, you cannot have 2
> >>> backup servers, even
> >>> though they may be talking to different storage
> >>> volume.
> >>>
> >>> Anyway, one solution given to me was to adjust the
> >>> startup script
> >>> (/etc/init.d/networker) so that backup server daemon
> >>> nsrd is not started on
> >>> the storage node when used as client. Of course,
> >>> when used as backup server
> >>> to the old library, stop nsr and uncomment off nsrd
> >>> in the startup script
> >>> again.
> >>>
> >>>
> >>>
> >>> On Thu, 8 Aug 2002 07:19:46 -0500, Rohrich, James
> >>> <rohrich AT UOP DOT COM> wrote:
> >>>
> >>> >Assuming you have a license, you also have to load
> >>> the storage node
> >>> software
> >>> >on Server B. This might mean unloading the backup
> >>> server software on the
> >>> >Server B first and then load the storage node
> >>> software. Becareful if server
> >>> >B was running as a backup server since you might
> >>> lose data. A storage node
> >>> >does not save indexes since they are only kept on
> >>> the backup server. Make
> >>> >sure you are doing what you want.
> >>> >
> >>> >-----Original Message-----
> >>> >From: Lee Hwan Meng
> >>> >To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
> >>> >Sent: 8/8/02 5:31 AM
> >>> >Subject: [Networker] Need help in DDS
> >>> >
> >>> >Hi
> >>> >
> >>> >Our environment:
> >>> >
> >>> >Server A (Networker backup server)
> >>> >Server B (Storage nodes)
> >>> >Using SAN, DDS enabled for both sharing 6 drives on
> >>> tape library
> >>> >
> >>> >When Server B is configured also as Networker
> >>> backup server, I got this
> >>> >error messages:
> >>> >
> >>> >Aug  8 10:18:19 A root: [ID 702911 daemon.notice]
> >>> NetWorker media:
> >>> >(notice)
> >>> >check storage node: B (a server cannot be a storage
> >>> node)
> >>> >
> >>> >The point is, I have some data backed up in a
> >>> smaller library before the
> >>> >arrival of this 6-drive monster, in order to
> >>> retrieve the data, I need
> >>> >to
> >>> >attached Server B to the smaller library, so Server
> >>> B also needs to be a
> >>> >backup server. How can I achieve that? Is it
> >>> possible to do it?
> >>> >
> >>> >Thanks.
> >>> >
> >>> >Regards
> >>> >Hwan Meng
> >>> >
> >>> >--
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> >>Busenkelt!
> >>
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