IDS Forum

Re: Error in ontape

Posted By: Art S. Kagel (Oninit LLC)
Date: Wednesday, 12 December 2007, at 9:11 a.m.

In Response To: Error in ontape (SHAILESH MISHRA)

SHAILESH MISHRA wrote:
> hi
>

I'll answer your questions below, but I will begin by saying that you
should definitely RTFineM (Backup and Restore Guide) more thoroughly and
also search this forum's and the CDI archives and read the Infomrix FAQ
because this a recurring topic.

> I am trying to replicate IDS10 in another system thru ontape.
> I took Level 0 backup of source IDS10 and trying to restore in
> destination IDS10.
> ontape -s -L 0-t STDIO>level-0 (In source IDS10)
> I copied this level-0 file into Destination IDS10 and run the
> following command
> 1)cat level-0|ontape -r -t STDIO (when IDS10 is online)
> It threw error Physical Restore failed gsf_ppc
> Invalid DBspace (Actually this is a dbspace in source
> which is not available in destination)
> 2)cat level-0|ontape -p -t STDIO(When IDS10 was offline)
> it threw physical restore failed ONCONFIG ROOTPATH /home/chunk/rootdbs
> diffres from archive: /ofbdbs/chunk/rootdbs
> Correct ONCONFIG before restoring this archive.
>
>

Partly because the engine has to be OFFLINE to perform a full restore.
You can only restore non-critical dbspaces to a running instance and
ONLY dbspaces that are already part of that instance NOT from another
instance. You CAN restore from one machine to another to clone a
server, but the engine has to be offline.

> My questions is :-
>
> 1)Do we need to have same ONCONFIG in Source and Destination ?
> Any switch on ontape to override these param?
>

Only disk parameters in the ONCONFIG file need to be the same.
Parameters like ROOTDB. Also all of the chunk paths from the source
server must exist on the target (unless you use chunk renaming during
the restore - see the manual - which MAY not work when used together
with STDIO input according to IBM [bug]) and each must be at least as
large as the corresponding chunk on the source machine.

> 2)How can i overcome this situation?(apart from creating the
> same directory structure,chunk name etc)
>

Use the chunk renaming feature of ontape (RTFM).

> 3)I am trying to copy various database from different
> IDS into one system.ER is not possible as we are running
> one legecy application on which we are not going to make
> any changes at Database level.
>

Not possible using ontape or onbar. You will have to dbexport the
databases from the source instance and dbimport them onto the target
server instance. (See the Migration Guide.)

> 4)Any other way of making "offline offsite readonly one day old"
> copy of many databases from several different IDS installations?
>

Enterprise Replication with replication normally turned off. Then you
manually sync the many source servers to the one copy server once a day
so that the data is at most one day old. (See the Enterprise
Replication Guide.)

> 5)How about running n number of IDS instances in
> a single system? Do i need to install IDS in n number of locations ?
>

Yes, you can run as many instances as your machine can handle (which is
usually quite a few - I've seen as many as 20 instances on a 32-way
UltraSPARC box all running happily). All of hte instances can be run
from the same installation directory/copy, you just need independent
ONCONFIG files with different ROOTDB, DBSERVERNAME/DBSERVERALIASES and
SERVERNUM entries.

Art S. Kagel
> Thanks in advance for helping me and guiding me.
>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

Messages In This Thread

• Error in ontape
  SHAILESH MISHRA -- Wednesday, 12 December 2007, at 4:36 a.m.
  • Re: Error in ontape
    Art S. Kagel (Oninit LLC) -- Wednesday, 12 December 2007, at 9:11 a.m.
    • Re: Error in ontape
      SHAILESH MISHRA -- Thursday, 13 December 2007, at 12:22 a.m.
      • Re: Error in ontape
        Art S. Kagel (Oninit LLC) -- Thursday, 13 December 2007, at 1:37 a.m.
      • Re: Error in ontape
        Martin Fuerderer -- Thursday, 13 December 2007, at 7:57 a.m.
        • Re: Error in ontape
          Sebastian, Norma J. -- Thursday, 13 December 2007, at 8:34 a.m.
  • Re: Error in ontape
    NESTOR RODRIGUEZ -- Thursday, 13 December 2007, at 6:15 a.m.

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