IDS Forum

RE: ART - Q on MY??port tools

Posted By: Tim Ertl
Date: Friday, 25 July 2008, at 11:50 a.m.

In Response To: Re: ART - Q on MY??port tools (Art Kagel)

Art, further research showed me that myonpload can not run right on Informix
9.30 due to lack of support in the 9.30 spl for the hpl.sql set up script.

I am looking at the ipload database that gets created to store parameters to
run on the onpload jobs. I also found a very good article on The Informix
High Performance Loader - Part 1 Posted by Andrew Ford @ 01:03 PM ET | May
16, 2008. This article uses a yucky ipxladm program with messy set up files
to create the onpload jobs.
What I did so far was create a single job with ipload and I am thinking of
writing a dbaccess script to change the names of the tables and files I want
to backup in the onpload database and then run onpload. They appear to be in
plain text. I am tinkering. There has to be a better way. I see myexport
referenced by other people doing upgrades. I can not believe so many sites
do upgrades manually!

Tim Ertl
413-442-9000 x6211

-----Original Message-----
From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On Behalf Of Art
Kagel
Sent: Thursday, July 24, 2008 8:16 PM
To: ids@iiug.org
Subject: Re: ART - Q on MY??port tools [12898]

Oh, yes, iploader is MUCH faster than sqlreload (or sqlunload for that
matter) even in Deluxe Mode. Getting myexport to use myonpload (and so
ipload) rather than sqlunload/sqlreload should as as simple as adding -D,
-C, or -S to myexport and -H D or -H E to myimport. That's why I was
confused, I though you were saying that using the iploader yourself was MUCH

faster than using myimport with the -HD or -HE option. Now I have to start
running a whole new set of tests to make sure this is working - thanks
(seriously - I thought this worked). I may also recode an option to use the
new onpladm utility instead of myonpload.

Art

On Thu, Jul 24, 2008 at 7:55 PM, Tim Ertl <tim@lmrgroup.com> wrote:

> Art, thank you for responding. I did ONE table with myexport and then I
did
> the same table with ipload (gui) and I discovered that ipload has some
> fantastic speed compared to sqlunload. I tried to use myexport and get it
> to
> use myonpload but that had some problems and I do not see how I could get
> it
> to spawn myonload rather than sqlload. I finally modified the awk script
to
> only be able to run myonpload (yes I tried the -D). I am prepared to
create
> ALL the unload jobs on ipload to import/export everything that way it was
> that fast!
>
> Yes I tried the -p on myexport.
>
> When I mean faster I mean FASTER. You sound like you don't expect that so
> let me describe my situation. I have a TEST system with my biggest problem

> table. A single table of 2.6million rows, 6GB on Informix 9.30.uc1 1GB
> memory and some 450mhz Sun Sparc CPUs. Importing onto Informix 11.10 with
> 32GB memory and 8 core Sparc t5120 cpu.
> Ipload export takes 35 minutes. Myexport seems to be two times slower on
> export at about 6hours 30minutes.
> Myimport takes 10 hours to load. ipload did the same import in 60 minutes.

> Both machines were idle (no other servers and no users at all on the
> hardware server). Both WERE creating indexes during the import (no -m).
The
> New server was limping along and cpu usage never went above 2% for either
> myimport or ipload (import).
>
> Most of my 126 tables except that one are less than 500MB some are as
small
> as 1mb. On another test I tried to export ALL my tables (-p) and found it
> to
> take 32 hours with myexport. Without the -p it went longer than 30 hours
> and
> I killed it as it was unacceptable. I have yet to spend the effort to test

> a
> full database export using ipload but I might! The tests are encouraging.
>
> Thanks for any info or hints you may have.
>
> Tim Ertl
> 413-442-9000 x6211
>
> -----Original Message-----
> From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On Behalf Of Art
> Kagel
> Sent: Thursday, July 24, 2008 6:05 PM
> To: ids@iiug.org
> Subject: Re: ART - Q on MY??port tools [12893]
>
> Tim,
>
> The -D option just runs the myexport using DIRTY READ isolation. Dirty
read
> does NOT affect data loads at all! It only allows you to read data without

> having to negotiate and wait for locks when reading existing data. Even
> under DIRTY READ isolation you still have to take locks on the rows that
> you
>
> insert, that's why there is no -D option in myimport.
>
> Myimport is slow? Questions:
>
> - Have you tried loading using the iploader Express Mode (-H E) ? Can't
>
> get faster than that without the real-time loader.
>
> - Did you use myexport with -m so that you can use -m with myimport to
>
> load the data without the indexes and constraints online?
>
> - Are you using the -p option?
>
> - With -p if you have many tables (more than 2x #CPU VPs usually) you
>
> can see significant slowdowns. If this is the case, let me know and I'll
>
> send you the next release of myexport which has a throttle so you can set
>
> the maximum number of tables to load in parallel. I haven't finished
>
> cleaning it up, so it hasn't been uploaded to the IIUG site, but it works
>
> and I can send it to you. IB that I mentioned that to you already.
>
> Art
>
> On Thu, Jul 24, 2008 at 3:44 PM, Tim Ertl <tim@lmrgroup.com> wrote:
>
> > Art, I see support for "myonpload" in your myexport/myimport programs.
> >
> > One of the draw backs to myexport/myimport is the slow speed. I see the
> > myexport has a "-D" option but myimport does not?
> >
> > I am tempted to hack the LOADPROG variable and let it fly but I wanted
to
> > run it by you since you probably would have done it already if it
worked.
> >
> > Willing to test...
> > ,,,Tim
> >
> > Tim Ertl
> > 413-442-9000 x6211
> >
> >
> >
> >
>
>
****************************************************************************

> ***
> > 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.
>
>
>
****************************************************************************

> ***
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>
>
>
****************************************************************************
***
> 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.

****************************************************************************
***
Forum Note: Use "Reply" to post a response in the discussion forum.

Messages In This Thread

• ART - Q on MY??port tools
  Tim Ertl -- Thursday, 24 July 2008, at 3:44 p.m.
  • Re: ART - Q on MY??port tools
    Art Kagel -- Thursday, 24 July 2008, at 6:05 p.m.
    • RE: ART - Q on MY??port tools
      Tim Ertl -- Thursday, 24 July 2008, at 7:55 p.m.
      • Re: ART - Q on MY??port tools
        Art Kagel -- Thursday, 24 July 2008, at 8:15 p.m.
        • RE: ART - Q on MY??port tools
          Tim Ertl -- Friday, 25 July 2008, at 11:50 a.m.
          • Re: ART - Q on MY??port tools
            Art Kagel -- Friday, 25 July 2008, at 11:56 a.m.

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