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IDS Forum

Re: Migrating informix 5.x to 9.x

Posted By: Rajib Sarkar
Date: Tuesday, 10 June 2003, at 1:27 p.m.

In Response To: Re: Migrating informix 5.x to 9.x (Mark Scranton )





And to add to Mark's observations ...

U can use it with Pipes and essentially do an unload from an instance and
load onto another one in one job itself ...

At my client's place they use HPL all the time for load jobs and in DELUXE
mode (5 indexes on the table, row size 450 bytes) they are able to load
anywhere between 8-10 million rows / day in less than 2 hours, and this too
without any tuning from the HPL side ..we are just using the standard
config provided.

Its a really cool tool ....


Thanx much,
Rajib Sarkar
Advisory Support Engineer
IBM Data Management Solutions
Ph: 602-217-2100

As long as you derive inner help and comfort from anything, keep it --
Mahatma Gandhi



Tuesday, June 10, 2003 10:03 AM
To: ids@iiug.org
cc:
From: Mark Scranton/Denver/IBM@IBMUS
Subject: Re: Migrating informix 5.x to 9.x [1317]








I would recommend using HPL once the data is out to flat files. HPL is
underutilized from a client point of view, and is brutally fast. Most
clients shy away from it due to the X interface being "less than
intuitive". Once the load jobs are defined though, you invoke it from the
command line. There is also a command line verison of HPL, although I've
not used it.

I was playing with an "un-tuned" engine the other day, and was loading
18,000+ rows per second. I'm sure with tuning - placement of dbspaces,
devices, chunks, etc..not to mention tuning of HPL, that could be beaten.

HTH -
Mark.

Mark Scranton
Principal Consultant/Teacher
IBM Denver

IBM Software Group - Data Management
Office: 303-773-5067
Cell: 303-929-0914
email: mscranto@us.ibm.com





"ART KAGEL, ...."
<KAGEL@bloomberg. To: ids@iiug.org
net> cc:
Sent by: Subject: Re: Migrating
informix 5.x to 9.x [1315]
forum.subscriber@
iiug.org


06/10/2003 09:28
AM






Tbunload/onload are not compatible as these are page image unload/load
utilities
and are version dependent. Same for tbtape/ontape. You have to use a
character level unload/load or a direct server-to-server copy. You can
use
dbaccess's UNLOAD verb and use the dbload utility to reload the data or
use
OL5's dbexport -ss with IDS7's dbimport though you may have to edit the
schema
file to remove 5.0-isms and replace them with IDS7-isms. You could also
try my
dbcopy utility (in the package utils2_ak from the IIUG Software
Repository)
which can copy directly from the OL5 instance to the tables in the IDS7
instance. Dbcopy is very fast.

Art S. Kagel

----- Original Message -----
From: Joseph Dixon <jdixon@servnu.com>
At: 6/10 11:17

> What is the best utility for moving your data from informix 5.x to
informix
9.x
>
> 1. tbunload 5.1 to onload 9.3
> 2. tbtape 5.1 to ontape 9.3
>
> Or is there some other utility I should use. Both 5.1 and 9.3 server are
up
and
> running. I am just looking for the best method to move the data on
informix
5.1
> over to the informix 9.3 system.







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