I tried it over the weekend. It works this way:
1. Normally, Server A acts as Networker server (jbconfig to recognise new
library), Server B storage node. This is true for the new library in the new
env
2. To restore old data from old library, stop Server A's nsrd, stop Server
B
as storage node, start Server B as Networker server (with jbconfig to
recognise old library)
3. To revert back, stop Server B's nsrd, start Server A as Networker
server,
Server B as storage node.
Again, what I don't understand is why 2 nsrd cannot exist within a SAN env.
In my env, I have a Server C starting up as a Networker server
running/jbconfig another old library. I don't get the msg complaining about
this in Server A. Well, of course, Server C is not a storage node of the new
library.
Anyway, it works now for me with the above arrangement.
Any further input welcomed!
Regards
Hwan Meng
> -----Original Message-----
> From: lemons_terry AT emc DOT com [mailto:lemons_terry AT emc DOT com]
> Sent: Thursday, August 22, 2002 11:33 PM
> To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU; hwanlee AT SOFTHOME DOT NET
> Subject: 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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