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RE: transfer of large datafile Oracle7.3.4.4 databases to 8.1.7. 1.3

From: Kevin Kostyszyn <kevin_at_dulcian.com>
Date: Mon, 18 Jun 2001 11:31:36 -0700
Message-ID: <F001.0032D8E2.20010618110609@fatcity.com>

Question,

        What were the problems you ran into with this? I have a 4 gig datafile on NT 4.0 with Oracle 816 SE. I don't believe we're experiencing any problems. kev

-----Original Message-----
Patrice J
Sent: Monday, June 18, 2001 1:51 PM
To: Multiple recipients of list ORACLE-L 8.1.7. 1.3

FYI, Oracle Support confirmed that I hit a 2G file size limit for Oracle databases on NT. This "probably" led to data dictionary corruption.

I don't know if this is an NTFS limitation or Oracle on NT problem, but at this point I don't care, I can fix this by creating multiple smaller datafiles per tablespace.

Regards,
Patrice Boivin
Systems Analyst (Oracle Certified DBA)

Systems Admin & Operations | Admin. et Exploit. des systèmes
Technology Services        | Services technologiques
Informatics Branch         | Direction de l'informatique
Maritimes Region, DFO      | Région des Maritimes, MPO

E-Mail: boivinp_at_mar.dfo-mpo.gc.ca <mailto:boivinp_at_mar.dfo-mpo.gc.ca>

        -----Original Message-----
        From:   Boivin, Patrice J [SMTP:BoivinP_at_mar.dfo-mpo.gc.ca]
        Sent:   Monday, June 18, 2001 1:01 PM
        To:     Multiple recipients of list ORACLE-L
        Subject:        transfer of large datafile Oracle7.3.4.4  databases
to 8.1.7.1.3

        Has anyone successfully transferred large datafile Oracle databases from

        Oracle7.3. to 8.1.7? By large datafile database I mean a database that has

        files over 2G in size. This may not apply to all, it may apply only to

        those who extended the files beyond 2G. Just curious, since many of you

        appear to have made thet move from Oracle 7.3.4. to 8.1.6. or 8.1.7..

        Here we did a full export of the db (Tru64 UNIX), ftp'ed it to another

        server (NT 4), then ran the 8.1.7 import to re-create the users and other

        global information. I aborted the import when the import started to create

        tables. Then I deleted user accounts I didn't need on the development

        database, and did a user import for the schemas that I needed. Using SQL I

        then re-created all the public synonyms, since the import utility did not

        re-create those.

        However the Change Manager tells me that the SYSTEM tablespace doesn't exist

        in the new database. Meanwhile the new database is open, and we can query

        from it. All the accounts appear to be accessible. Some objects
(packages,

        procedures, views) are invalid, but not many. The developers are now going

        through twelve packages and one procedure that did not compile successfully,

        probably due to tightening of the code standards.

        Anyway when I run the import utility in show=y mode, I see in the import SQL

        code something that I saw last year: create tablespace statements with

        datafile sizes that are 1.7 billion Gigabytes. <grin> We don't have enough

        disk to hold that much data, and besides I don't think that NT can support

        files that size. I know that UNIX can't.

        e.g. "CREATE TABLESPACE "USERS" DATAFILE
        '/oracle2/oradata/xxxxxx/users01.dbf' SI"
         "ZE 18446744073608888320       DEFAULT STORAGE (INITIAL 40960 NEXT
40960
        MIN"
         "EXTENTS 1 MAXEXTENTS 505 PCTINCREASE 0) ONLINE PERMANENT"

        Last year Oracle Support told me to pre-create the tablespaces, do
the full
        import, and ignore the error reports during the import.  They said
that
        because the tablespaces do exist, import will produce an error but
it will
        move on and do its thing.  Given that I am creating new databases
and we
        wish to migrate our major production databases, I would much prefer
it if
        there were no errors anywhere.  Another issue with this bug is that
when the
        import utility goes berserk, it also imports SYS objects during full
        imports.  Maybe that wasn't a big problem when the data dictionary
was of
        the same version and we imported a full database into an empty one,
but in
        this case the Oracle version is different.  What a mess this could
become.

        Change Manager does report differences between SYS objects in the older

        Oracle 7.3. database and the new 8.1.7 database, but I haven't gone through

        them all one by one to compare the columns, etc.. Neither have I gone

        through the list of data dictionary views to ensure that those that are

        different from Oracle7 DO show up as different in Change Manager.

        We did find some Designer structures in the new database's SYS schema

        however. This tells me that import may have tried to overwrite other SYS

        schema structures (? Not sure).

        I wonder if the error is caused by the Oracle7.3. export utility, by the

        rdbms engine on that old version, or if it is still a bug in 8.1.7..

        I logged a TAR with Oracle, but haven't heard back from them yet. They

        asked me to do a database-to-database comparison in Change Manager, instead

        of doing a database-to-baseline or baseline-to-baseline comparison
(which I

        have done, both report "missing" objects and tablespaces).

        We are considering what our options are at this point. Pre-creating all the

        objects and then importing user by user doesn't sound good to me. Likewise

        with the migrate utility, if the problem is with the rdbms engine, it won't

        work either.

        I could do a full import in rows=n mode I suppose, to see what would happen

        then. The error appears to be in the import code, however.

        Oracle no longer fixes bugs in Oracle 7.3.4., they will not fix this problem

        in the older version.

        Regards,
        Patrice Boivin
        Systems Analyst (Oracle Certified DBA)

        Systems Admin & Operations | Admin. et Exploit. des systèmes
        Technology Services        | Services technologiques
        Informatics Branch         | Direction de l'informatique
        Maritimes Region, DFO      | Région des Maritimes, MPO

        E-Mail: boivinp_at_mar.dfo-mpo.gc.ca <mailto:boivinp_at_mar.dfo-mpo.gc.ca>



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Received on Mon Jun 18 2001 - 13:31:36 CDT

Original text of this message

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