Re: Q: EXP from AIX and IMP in HP possible?

So, you're saying that if I were to ftp a regular file, or read the data from a raw device and place either in the same "type" of file/device from hpux 11 to 10.2 or vice-versa, that those files would be corrupt somehow. That the transfer itself across differing versions or platforms (UNIX) would mix up the bits or otherwise muck up the data?

Yes I agree that a binary executable file from hpux 11 ( compiled on 11 ) will probably not run on 10.2, if they are indeed NOT binary compatible, but the contents of the file remain the same across versions ( if simply moved there from one to the other ), not matter what. That's why 10.2 will complain.

It is my understanding that the content of an Oracle datafile has nothing to do with how it is stored and that it is standard per version across platforms. If you simply read the file or raw device, starting with the Oracle header, and take this to another platform, it will look and feel exactly the same ( to the Oracle background processes ), regardless of how that storage is implemented at the OS level.

How else would software companies be able to produce reliable redo log sniffers and other neat, datafile based tools for Oracle that run across many supported platforms? They certainly couldn't go through the long reverse-engineering procedure for each platform.

Granted, I've not tried this, however it would not be very difficult to test.

Anybody want to take that on?

-Kevin
--

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Pete Sharman wrote in message <371608EC.F8F9D98E_at_us.oracle.com>...
>Steve
>
>You're correct, the only way this is supported is from the same OS to the
same OS.
>There are even issues sometimes with that (for example, from memory the
files are
>binary incompatible between HP-UX 10.2 and 11), so it has to be copied from
the
>same release of the OS to the same release of the OS.
>
>HTH.
>
>Pete
>
>Steve Phelan wrote:
>
>> Hmm.. I too have done this on the *same* platform, but I have my doubts
between
>> platforms, and I've never heard Oracle say anything like this is
supported.
>> Still, anyone tried it? Does it actually work?
>>
>> Steve Phelan.
>>
>> Kevin Brand wrote:
>>
>> > Actually, you can copy the datafiles themselves from one platform to
>> > another, skipping any local LVM headers. Use dd for raw on UNIX or
just
>> > copy the files from the filesystem.
>> >
>> > Once you have all the files in the proper place, including copies of
the
>> > controlfiles and redo logs, and assuming that you don't want to change
file
>> > names or path names, its just like starting up after a cold backup.
>> >
>> > I use something like this from AIX to AIX, but it should also work from
HP
>> > to AIX or vice-versa ( adjusting for the differing LVM methodologies
from
>> > one to the other ).
>> >
>> > On the host where you want to create the copy database, execute:
>> >
>> > remsh host_where_db_lives 'dd if=/dev/raw_device bs=8192000 | gzip -5'
|
>> > gzip -d |dd of=/dev/my_new_logical_device bs=8192000
>> >
>> > note: the quotes above are very important.
>> >
>> > This assumes you are trusted as oracle between these two hosts and that
you
>> > have a sub 100Mbs LAN or are sending across a WAN. Otherwise, you may
not
>> > want to filter everything through gzip.
>> >
>> > Be very careful with this because you can easily wipe out your "good"
>> > database. In fact, I wouldn't recommend doing this at all. You should
go
>> > ahead and use exp/imp, as this is much easier.
>> >
>> > -Kevin
>> >
>> > --
>> >
>> > remove the x for an email reply
>> > katincic_at_access.net.au wrote in message
<3711E049.9642E443_at_access.net.au>...
>> > >Hi Stefano,
>> > >
>> > >it is possible and it is the only way to transfer database from one
>> > platform to
>> > >another
>> > >(I mean Exp/Imp). Just be sure to ftp the dump file (from one machine
to
>> > >another)
>> > >in binary mode.
>> > >Cheers,
>> > >
>> > >Maya
>> > >
>> > >Stefano Unternaehrer wrote:
>> > >
>> > >> Hi all.
>> > >> Is it possible to export a schema from a Oracle Database
>> > >> running on an AIX server and import the file on HP-UX,
>> > >> where the same Oracle RDBMS version is running?
>> > >> Something to do or to take care?
>> > >>
>> > >> PLEASE: also send me your reply as message.
>> > >> Thank you!
>> > >> Stefano
>> > >
>
>--
>
>
>Regards
>
>Pete
>
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>Peter Sharman Email: psharman_at_us.oracle.com
>WISE Course Development Manager Phone: +1.650.607.0109 (int'l)
>Worldwide Internal Services Education (650)607 0109 (local)
>San Francisco
>
>SQL> select standard_disclaimer, witty_remark
> 2 from company_requirements;
>
>Opinions are mine and do not necessarily reflect those of Oracle
>Corporation
>
>"Controlling application developers is like herding cats."
>Kevin Loney, ORACLE DBA Handbook
>"Oh no it's not! It's much harder than that!"
>Bruce Pihlamae, long term ORACLE DBA
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
>
Received on Mon Apr 19 1999 - 09:18:43 CDT