× The internal search function is temporarily non-functional. The current search engine is no longer viable and we are researching alternatives.
As a stop gap measure, we are using Google's custom search engine service.
If you know of an easy to use, open source, search engine ... please contact support@midrange.com.


  1.  Home
  2. MIDRANGE-L
  3. August 2017

RE: [IE] Re: [IE] Re: How can I speed up the copying of data using DDM and field selection.

Hi Darryl,

Sorry to be a bit of a pain but my comment seems to have been ignored and I'm just wondering why my solution works for me but not for you.

<< This can be easily done if the command is issued on the test system.
<<First create an SQL index or logical file on the source system that has the desired selection criteria.
<<Then create a DDM file on the test system that points to the logical on the source system.
<<Then run the CPYF command on the test system that uses the DDM file as the input.

<<We have a physical file on a source system that has 68 million records.
<<It has an SQL index whose selection criteria results in just 1626 entries.
<<The CPYF using the DDMF is almost instant and the test system ends up with just the desired 1626 entries.

Regards, Peter

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of a4g atl
Sent: Tuesday, 15 August 2017 1:23 AM
To: Midrange Systems Technical Discussion
Subject: [IE] Re: [IE] Re: How can I speed up the copying of data using DDM and field selection.

I believe it will.

The proof of the pudding will be in the eating.

Thank all.

Darryl

On Mon, Aug 14, 2017 at 9:03 AM, Rob Berendt <rob@xxxxxxxxx> wrote:

<snip>
Cognos' problem is probably that it is developed in MS SQL and MS SQL
uses the basic Select on the call to the remote system. I had this
problem several years ago and changed the selects to use FROMQUERY a
MS SQL command which passes the string command to Db2 which selects
the records on the remote system and only returns the selected data.
</snip>

thanks for the reply.

So, you think you have a resolution now? That JDBC will do the
selection on the host whereas CPYF didn't? If so, good.


Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





From: a4g atl <a4ginatl2@xxxxxxxxx>
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Date: 08/14/2017 08:56 AM
Subject: Re: [IE] Re: How can I speed up the copying of data using
DDM and field selection.
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



Dieter is correct. I also plan to use the JDBC as the medium and the
selection is always done on the remote system.

For all contributing here, many are missing the point that I cannot do
anything on the remote system other than run READ commands. So
creating extract files etc. is not possible.

Cognos' problem is probably that it is developed in MS SQL and MS SQL
uses the basic Select on the call to the remote system. I had this
problem several years ago and changed the selects to use FROMQUERY a
MS SQL command which passes the string command to Db2 which selects
the records on the remote system and only returns the selected data.

Darryl

On Fri, Aug 11, 2017 at 4:58 PM, Peter Connell
<Peter.Connell@xxxxxxxxxxx>
wrote:

Since I just demonstrated my method below for copying works, I don't
understand why you would not use it?

<< This can be easily done if the command is issued on the test system.
<<First create an SQL index or logical file on the source system
that
has
the desired selection criteria.
<<Then create a DDM file on the test system that points to the
logical
on
the source system.
<<Then run the CPYF command on the test system that uses the DDM
file as the input.

<<We have a physical file on a source system that has 68 million
records.
<<It has an SQL index whose selection criteria results in just 1626
entries.
<<The CPYF using the DDMF is almost instant and the test system ends
up with just the desired 1626 entries.

Peter

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf
Of
D*B
Sent: Saturday, 12 August 2017 4:42 AM
To: Midrange Systems Technical Discussion
Subject: [IE] Re: How can I speed up the copying of data using DDM
and field selection.

<Rob>
Then why, in our Cognos environment, were we getting abysmal
performance connecting from those servers to Db2 until we changed
the statements to openquery type things?
</Rob>

... the database monitor could give you the answer, or paying two
days
to
teach by example how to use it, I could give you the answer.

D*B

--
This is the Midrange Systems Technical Discussion (MIDRANGE-L)
mailing list To post a message email: MIDRANGE-L@xxxxxxxxxxxx To
subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/midrange-l
or email: MIDRANGE-L-request@xxxxxxxxxxxx Before posting, please
take a moment to review the archives at http://archive.midrange.com/midrange-l.

Please contact support@xxxxxxxxxxxx for any subscription related
questions.

Help support midrange.com by shopping at amazon.com with our
affiliate
link: http://amzn.to/2dEadiD
############################################################## This
correspondence is for the named person's use only. It may contain
confidential or legally privileged information, or both. No
confidentiality
or privilege is waived or lost by any mistransmission. If you
receive
this
correspondence in error, please immediately delete it from your
system
and
notify the sender. You must not disclose, copy or rely on any part
of
this
correspondence if you are not the intended recipient. Any views
expressed
in this message are those of the individual sender, except where the
sender
expressly, and with authority, states them to be the views of Equifax.
If
you need assistance, please contact Equifax :- Australia
www.equifax.com.au/contact New Zealand www.equifax.co.nz/contact
##############################################################
--
This is the Midrange Systems Technical Discussion (MIDRANGE-L)
mailing
list
To post a message email: MIDRANGE-L@xxxxxxxxxxxx To subscribe,
unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/midrange-l
or email: MIDRANGE-L-request@xxxxxxxxxxxx Before posting, please
take a moment to review the archives at
http://archive.midrange.com/midrange-l.

Please contact support@xxxxxxxxxxxx for any subscription related
questions.

Help support midrange.com by shopping at amazon.com with our
affiliate
link: http://amzn.to/2dEadiD

--
This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing
list To post a message email: MIDRANGE-L@xxxxxxxxxxxx To subscribe,
unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/midrange-l
or email: MIDRANGE-L-request@xxxxxxxxxxxx Before posting, please take
a moment to review the archives at
http://archive.midrange.com/midrange-l.

Please contact support@xxxxxxxxxxxx for any subscription related
questions.

Help support midrange.com by shopping at amazon.com with our affiliate
link: http://amzn.to/2dEadiD


--
This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing
list To post a message email: MIDRANGE-L@xxxxxxxxxxxx To subscribe,
unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/midrange-l
or email: MIDRANGE-L-request@xxxxxxxxxxxx Before posting, please take
a moment to review the archives at
http://archive.midrange.com/midrange-l.

Please contact support@xxxxxxxxxxxx for any subscription related
questions.

Help support midrange.com by shopping at amazon.com with our affiliate
link: http://amzn.to/2dEadiD

--
This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing list To post a message email: MIDRANGE-L@xxxxxxxxxxxx To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/midrange-l
or email: MIDRANGE-L-request@xxxxxxxxxxxx Before posting, please take a moment to review the archives at http://archive.midrange.com/midrange-l.

Please contact support@xxxxxxxxxxxx for any subscription related questions.

Help support midrange.com by shopping at amazon.com with our affiliate link: http://amzn.to/2dEadiD
############################################################## This correspondence is for the named person's use only. It may contain confidential or legally privileged information, or both. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this correspondence in error, please immediately delete it from your system and notify the sender. You must not disclose, copy or rely on any part of this correspondence if you are not the intended recipient. Any views expressed in this message are those of the individual sender, except where the sender expressly, and with authority, states them to be the views of Equifax. If you need assistance, please contact Equifax :- Australia www.equifax.com.au/contact New Zealand www.equifax.co.nz/contact ##############################################################

As an Amazon Associate we earn from qualifying purchases.

This thread ...
Follow-Ups:
Replies:
Follow On AppleNews
Return to Archive home page | Return to MIDRANGE.COM home page

This mailing list archive is Copyright 1997-2024 by midrange.com and David Gibbs as a compilation work. Use of the archive is restricted to research of a business or technical nature. Any other uses are prohibited. Full details are available on our policy page. If you have questions about this, please contact [javascript protected email address].

Operating expenses for this site are earned using the Amazon Associate program and Google Adsense.