IDS Forum

Re: Informix platform migration advice needed

Posted By: Art Kagel
Date: Monday, 12 January 2009, at 1:14 p.m.

In Response To: RE: Informix platform migration advice needed (Jonathan Smaby)

No problem, Jonathan. If this is the only problem, you don't need the full
myexport/myimport package, just myschema.

Get my utils2_ak package and build myschema. Using myschema with the -l
option you can create a dbimport compatible schema file and myschema always
outputs VIEWS after all actual TABLE definitions, unlike dbexport which
processes all systables entries in tabid order causing SYNONYMS, VIEWS, and
TABLES to be interleaved. If you have performed a non-in-place alter on a
table it's tabid will have been changed and any previously existing views
referencing those tables will have a lower tabid resulting in the problem
you've seen. Another one of the quirks in dbschema and dbexport that cause
me to have to keep maintaining and updating myschema.

Just double check the generated data file names embedded in the schema.
While I have tried to make the name generation compatible with dbexport, I
never know when IBM will change the algorithm and my own algorithm is
necessarily a set of educated guesses. It's not hard to write an awk or
perl script to extract the filenames from the schema and determine if the
file is there.

BTW, I uploaded an new release of utils2_ak last night. It may take a few
days for that version to be available for download. No major changes to
myschema, but there were improvements to dbcopy, ul and dostats included in
the package version with the README.1st file dated 2009-01-01.

When you run myschema for use with dbimport, it's a good idea to enable the
features that will automatically size each table's extents which will tend
to improve load speed.

Art

On Mon, Jan 12, 2009 at 12:50 PM, Jonathan Smaby
<Jonathan.Smaby@pomona.edu>wrote:

> Thanks Eric.
>
> I have over 900 tables in each database, in 6 databases. Most of my
> DB's are between 3-5 Gigabytes each. The databases are exactly alike
> because we have 5 Undergraduate colleges and 1 Graduate college with
> their own ERP database, and we share the ERP application between the 6
> institutions. The one database has about 40Gb because of all the
> meticulous transaction auditing done by one of the colleges. The
> problem that I'm running into is all of the views that point to each of
> the databases, dbimport bombs because the SQL statement creating the
> view to a table in a database that hasn't yet been imported. So, the
> import dies before completing.
>
> I though of editing the dbimport SQL script and plucking out all the
> create view commands, and putting them in a separate SQL script after
> each of the 6 databases have loaded their table data. But that's a lot
> of work.
>
> Thanks again Eric for any best practice advice.
>
> Sincerely,
>
> Jonathan Smaby
> Pomona College
> ---
> "traditions-like people-should be judged on their merits, not on the
> basis of historical associations unconnected to their actual character.
> There is the troubling idea that all things associated with an imperfect
> past should be considered tainted even if there is nothing inherently
> objectionable about them. And finally, there is the false sense of
> closure provided by getting rid of something so that we no longer need
> to talk about the issue that it calls to mind."
>
> ~ David Oxtoby,Ph.D., President - Pomona College
>
> -----Original Message-----
> From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On Behalf Of
> Eric Rowell
> Sent: Monday, January 12, 2009 9:28 AM
> To: ids@iiug.org
> Subject: Re: Informix platform migration advice needed [14487]
>
> I'm not sure why you had so much trouble with dbexport/dbimport since
> the
> files are text. How where the files transfered between the two systems?
> Are there pk/fk relationships that could be messing with the dbexport?
>
> I have heard great things about Art's Programs but haven't used them.
>
> How big is this database? Is it worth just scripting it out using
> "unload"
> for the first test?
>
> As for the backup tools being used... Sorry out of luck there.
>
> Good Luck,
>
> Eric B. Rowell
>
> On Mon, Jan 12, 2009 at 12:17 PM, Jonathan Smaby
> <jonathan.smaby@pomona.edu>wrote:
>
> > Good morning,
> >
> > My school is currently an HPUX shop and we use IDS 10.00.FC5 64bit
> version
> > of the Informix binary. I am looking to test my HPUX University
> management
> > ERP solution against an IDS engine running on a RedHat or Suse Linux
> on an
> > Intel x86_64 box. I=B9ve ran into too many problems using
> > dbimport/dbexport.
> > I haven=B9t tried Art=B9s myexport/myimport yet. However, I do have
> > EMC/Legato
> > networker for my backup solution. Is it possible to migrate data
> > cross-platform using onbar/legato? I believe an imported restore
> appears t=
> > o
> > be binary specific, but if anyone has done that with onbar in a cross
> > platform use. I have tried using HPL, but it=B9s not practical due to
> the
> > fact that I cannot export and import and entire database.
> >
> > If you have any advice and best practice recommendations for this
> > challenge=
> > ,
> > I would be very grateful to hear your experience.
> >
> > Thanks in advance.
> >
> > Sincerely,
> >
> > Jonathan Smaby
> > Pomona College
> >
> > -------------------------------------------------------------
> > This message has been scanned by Postini anti-virus software.
> > =0D
> >
> >
> >
> >
> ************************************************************************
> *******
> > Forum Note: Use "Reply" to post a response in the discussion forum.
> >
> >
>
> --
> Eric B. Rowell
>
> ************************************************************************
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> Forum Note: Use "Reply" to post a response in the discussion forum.
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>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

--
Art S. Kagel
Oninit (www.oninit.com)
IIUG Board of Directors (art@iiug.org)

Disclaimer: Please keep in mind that my own opinions are my own opinions and
do not reflect on my employer, Oninit, the IIUG, nor any other organization
with which I am associated either explicitly or implicitly. Neither do
those opinions reflect those of other individuals affiliated with any entity
with which I am affiliated nor those of the entities themselves.

Messages In This Thread

• Informix platform migration advice needed
  Jonathan Smaby -- Monday, 12 January 2009, at 12:17 p.m.
  • Re: Informix platform migration advice needed
    Obnoxio The Clown -- Monday, 12 January 2009, at 12:22 p.m.
  • Re: Informix platform migration advice needed
    Eric Rowell -- Monday, 12 January 2009, at 12:28 p.m.
    • RE: Informix platform migration advice needed
      Jonathan Smaby -- Monday, 12 January 2009, at 12:50 p.m.
      • Re: Informix platform migration advice needed
        Art Kagel -- Monday, 12 January 2009, at 1:14 p.m.
        • RE: Informix platform migration advice needed
          Jonathan Smaby -- Monday, 12 January 2009, at 1:45 p.m.
          • Re: Informix platform migration advice needed
            Art Kagel -- Monday, 12 January 2009, at 2:17 p.m.
      • Re: Informix platform migration advice needed
        Eric Rowell -- Monday, 12 January 2009, at 1:47 p.m.
        • Re: Informix platform migration advice needed
          Art Kagel -- Monday, 12 January 2009, at 2:20 p.m.
          • Re: Informix platform migration advice needed
            Jonathan Smaby -- Monday, 12 January 2009, at 2:41 p.m.
            • Re: Informix platform migration advice needed
              rroussey@comcast.net -- Monday, 12 January 2009, at 3:20 p.m.
              • Re: Informix platform migration advice needed
                Art Kagel -- Monday, 12 January 2009, at 3:54 p.m.
            • Re: Informix platform migration advice needed
              Art Kagel -- Monday, 12 January 2009, at 3:42 p.m.
              • RE: Informix platform migration advice needed
                Jonathan Smaby -- Monday, 12 January 2009, at 4:51 p.m.
                • Re: Informix platform migration advice needed
                  Art Kagel -- Monday, 12 January 2009, at 5:25 p.m.
  • Re: Informix platform migration advice needed
    Art Kagel -- Monday, 12 January 2009, at 1:00 p.m.

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