IDS Forum

Re: Informix platform migration advice needed

Posted By: Eric Rowell
Date: Monday, 12 January 2009, at 1:47 p.m.

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

Jonathan,

I Love when Views Accross Databases get in the way ( have them and
always have a script to recreate them after). I am sure that Art or someone
will have a more elegent way of doing this one of their tools but I will try
to give you a shot in the dark...

The following is not a best practice (not even close) as I don't think you
want to perpare all of the scripts to do so. 40G is not much in the way of
data... I would hope the following doesn't take long.

One way in short is to:

# unload all tables using a script which would take in a table list to
start unloads
ie:

ksh

mkdir database_name_1

cd database_name_1

dbaccess database_name_1 <<UNLOAD_TBL_LST

UNLOAD TO database_name_1_table_list

SELECT tabname

FROM systables

WHERE tabtype = "T"

and tabid > 99;
UNLOAD_TBL_LST

cat database_name_1_table_list | while read table_name
do

dbaccess database_name_1<<UNLOAD_TBL >$table_name_unload.out 2>&1&

UNLOAD TO database_name_1_$table_name.unl

SELECT *

FROM $table_name;
UNLOAD_TBL
done

# Create DBSchema on all databases
# Run All of the Scripts (Don't really care about errors for things not
created since a second run should create them).
# Run All of the Scripts Again (Don't really care about errors for things
not created since a second run should create them).

# Load all tables using a script which would take in a table list to start
unloads
ie:

ksh

cd database_name_1

cat database_name_1_table_list | while read table_name
do

dbaccess database_name_1<<LOAD_TBL >$table_name_load.out 2>&1 &

LOAD FROM database_name_1_$table_name.unl

INSERT INTO $table_name;
LOAD_TBL
done

#####################################################

I would have to say the best practice would to be to have scripts which
sepeately create at least the following;

Script 1:

Sequences * (If required for Tables)

Tables

Script 2:

Indexes, Relationships

UDR

Views

Permissions * (Could be included in both.)

Some of this is still hard to place since you could require a UDR in an
Index or Require a View in a UDR. So as you have already stated it is hard
to script this... But if you start with the basic database foundation for
each database you can build from there.

Eric B. Rowell

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.
>
>

--
Eric B. Rowell

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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