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IDS Forum

AW: Data migration Brainstorm.

Posted By: Andreas.KUTSCHE@spar.at
Date: Wednesday, 27 January 2010, at 12:05 p.m.

In Response To: Re: Data migration Brainstorm. (Obnoxio The Clown)

Hi,

yes, for small databases dbexport/dbimport will be the best thing.

For larger ones the suggestion
INSERT INTO new SELECT * FROM old
is very good, because you can copy tables in parallel (at least the large ones).
You can use raw-tables on the target database and change them to standard afterwards - really fast!
For index creation afterwards use PDQ.

Regards,
Andreas

>
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-------------------------------------------
-----Ursprüngliche Nachricht-----

> Von: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] Im
> Auftrag von Obnoxio The Clown
> Gesendet: Mittwoch, 27. Januar 2010 17:57
> An: ids@iiug.org
> Betreff: Re: Data migration Brainstorm. [18800]
>
> Knox, Ernest wrote:
> > We are upgrading our Servers, OS and version of Informix from 7.30,
> > 7.31, 9.21, 9.30, and 9.40 to version 11.50.
> >
> > My brainstorming question(s) to the group is:
> >
> > What is the quickest way to migrate between 1 gig to 300
> gig of data?
> >
> > Since I can't use a backup and restore from different versions (I
> > don't
> > believe) and one or two databases do not have logging turned on, so
> > replication is basically out.
> >
> > Would HPL, manual scripts (dbexport and dbimport), or a third party
> > product do the trick.
> >
> > Please, your thoughts and suggestions are very helpful.
>
> For a small database (anything less than 50 GB), I reckon
> dbexport would probably be adequate. It will probably take
> you longer to do all the faffing around that HPL requires. If
> you have to do all the messing around to get tables in the
> right order for referential integrity, then you might as well
> use INSERT INTO new SELECT * FROM old, rather than HPLing.
> 300GB isn't all that much any more. :o)
>
> --
> Cheers,
> Obnoxio The Clown
>
> http://obotheclown.blogspot.com
> I will now proceed to pleasure myself with this fish.
>
> --
> This message has been scanned for viruses and dangerous
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> believed to be clean.
>
>
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