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Re: quickest method

From: Ryan <rgaffuri_at_cox.net>
Date: Wed, 14 May 2003 19:06:42 -0800
Message-ID: <F001.005992DB.20030514190642@fatcity.com>


Unfortunately perl isnt in my skillset. Do you need to purchase a perl compiler to use it? We are on solaris. does one come with solaris?

I would think the fastest method would be to transport the tablespace then do insert /*+append*/ to the new tablespaces. That way you dont have to do any exports. you can do a

'create table as' or use a move to a tablespace to transport.

am I onto something? Im going to have to do some data migration. Was something I was leaning towards.
----- Original Message -----
To: <ORACLE-L_at_fatcity.com>
Cc: <rgaffuri_at_cox.net>
Sent: Wednesday, May 14, 2003 9:07 PM

> Unloading with Perl is *very* fast.
>
> Much faster the spooling with sqlplus.
>
> There's no way I would use UTL_FILE for that.
>
> Perl is not only fast, it's flexible. eg. you don't have
> to write the files on the database server.
>
> Jared
>
>
>
>
>
>
> "Ryan" <rgaffuri_at_cox.net>
> Sent by: root_at_fatcity.com
> 05/14/2003 06:01 PM
> Please respond to ORACLE-L
>
>
> To: Multiple recipients of list ORACLE-L
<ORACLE-L_at_fatcity.com>
> cc:
> Subject: Re: quickest method
>
>
> If SQLLOADER is the faster to load data, what is the fastest to unload it?
> UTL_FILE is notoriously slow.
> ----- Original Message -----
> To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com>
> Sent: Wednesday, May 14, 2003 7:01 PM
>
>
> > Carol,
> >
> > Hands down, SQL Loader is the fastest.
> >
> > Export/Import is rather slow.
> >
> > SQL and PL/SQL commands can be on either side of exp/imp, depending
> > on what you are doing and how well the code is written.
> >
> > e.g. SQL statements are fairly fast, PL/SQL for loops are not. Pl/SQL
> > bulk
> > processing is fast.
> >
> >
> > Unless you need the programatic abilities of PL/SQL, use SQL Loader.
> >
> > Exp/Imp can still be useful, even with SQL Loader. Use exp/imp to build
> > your tables, then the indexes and constraints after the data is loader.
> >
> > No pat answer as to how to load data, depends on your requirements.
> >
> > There's probably no point in messing with SQL Loader if the data sets
> > are small, and you can easily export from another database and then
> > import.
> >
> > If the data is in CSV or flat files though, and/or is very large, SQL
> > Loader
> > is very fast.
> >
> > HTH
> >
> > Jared
> >
> >
> >
> >
> >
> >
> > "Carol Legros" <carol_legros_at_hotmail.com>
> > Sent by: root_at_fatcity.com
> > 05/14/2003 02:57 PM
> > Please respond to ORACLE-L
> >
> >
> > To: Multiple recipients of list ORACLE-L
> <ORACLE-L_at_fatcity.com>
> > cc:
> > Subject: quickest method
> >
> >
> > I'm curious to know whether anyone out there has seen a comparison
> > discussing the pros and cons and/or results of any simulation tests that
> > compare the speed with which data can be loaded into a target database
> > from
> > a source (database or flat file) using the following 3 methods :
> >
> > (i) Export (from source), Import (to target)
> > (ii) SQL*Loader (to target)
> > (iii) SQL or PL/SQL commands (insert to target)
> > using a Database Link between source &
> > target
> >
> > I'm working on a data loading strategy and since there are "many ways to
> > skin a cat", I'm considering these as options. Of course, there are
> other
> >
> > criteria that impact the method chosen, but assuming all things are
> equal
> > (ie network bandwidth is good, access to both source and target are not
> an
> >
> > issue etc.), which of these methods would be quickest ?
> >
> > Thanks,
> > Carol
> >
> > _________________________________________________________________
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> >
> > --
> > Please see the official ORACLE-L FAQ: http://www.orafaq.net
> > --
> > Author: Carol Legros
> > INET: carol_legros_at_hotmail.com
> >
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> > --
> > Please see the official ORACLE-L FAQ: http://www.orafaq.net
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> > Author:
> > INET: Jared.Still_at_radisys.com
> >
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> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: Ryan
> INET: rgaffuri_at_cox.net
>
> Fat City Network Services -- 858-538-5051 http://www.fatcity.com
> San Diego, California -- Mailing list and web hosting services
> ---------------------------------------------------------------------
> To REMOVE yourself from this mailing list, send an E-Mail message
> to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
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> also send the HELP command for other information (like subscribing).
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>
>
>

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Ryan
  INET: rgaffuri_at_cox.net

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
San Diego, California        -- Mailing list and web hosting services
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Received on Wed May 14 2003 - 22:06:42 CDT

Original text of this message

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