Return-Path: Received: from ensim.rackshack.net (root@localhost) by orafaq.net (8.11.6/8.11.6) with ESMTP id h0UI64W15892 for ; Thu, 30 Jan 2003 12:06:04 -0600 X-ClientAddr: 209.68.248.164 Received: from newsfeed.cts.com (newsfeed.cts.com [209.68.248.164]) by ensim.rackshack.net (8.11.6/8.11.6) with ESMTP id h0UI64m15887 for ; Thu, 30 Jan 2003 12:06:04 -0600 Received: from fatcity.UUCP (uucp@localhost) by newsfeed.cts.com (8.9.3/8.9.3) with UUCP id GAA93842; Thu, 30 Jan 2003 06:48:12 -0800 (PST) Received: by fatcity.com (26-Feb-2001/v1.0g-b72/bab) via UUCP id 0053E767; Thu, 30 Jan 2003 05:55:21 -0800 Message-ID: Date: Thu, 30 Jan 2003 05:55:21 -0800 To: Multiple recipients of list ORACLE-L X-Comment: Oracle RDBMS Community Forum X-Sender: "Stephen Evans" Sender: root@fatcity.com Reply-To: ORACLE-L@fatcity.com Errors-To: ML-ERRORS@fatcity.com From: "Stephen Evans" Subject: Re: data migration strategies Organization: Fat City Network Services, San Diego, California X-ListServer: v1.0g, build 72; ListGuru (c) 1996-2001 Bruce A. Bergman Precedence: bulk Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="=_alternative 004C6AC185256CBE_=" --=_alternative 004C6AC185256CBE_= Content-Type: text/plain; charset="us-ascii" vijaya, partition your bigger tables so that they can be loaded by sqlldr via direct path in parallel drop indexes (especially global indexes) before loading do some testing first to determine optimum number of parallel streams from a cpu usage standpoint and an io contention standpoint. try and separate segments that are loaded in parallel by disk & controller consider striping (raid 1+0) across 7 devices or so. good luck, steve "Vijaya Chander V.S" Sent by: root@fatcity.com 01/30/2003 03:58 AM Please respond to ORACLE-L To: Multiple recipients of list ORACLE-L cc: Subject: data migration strategies Hi, Thank you for your responses. What kind of strategies should be followed while migrating data from Sybase to Oracle and non-propriatory databases to Oracle so that the down time is as low as possible. The Sybase database size is 2TB and other DB's total make up to 400GB any pointers will be helpful to us... regards, Vijaya Chander V.S -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Vijaya Chander V.S INET: srinivasa_v@infosys.com 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@fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). --=_alternative 004C6AC185256CBE_= Content-Type: text/html; charset="us-ascii"
vijaya,

partition your bigger tables so that they can be loaded by sqlldr via direct path in parallel

drop indexes (especially global indexes) before loading

do some testing first to determine optimum number of parallel streams from a cpu usage standpoint and an io contention standpoint.

try and separate segments that are loaded in parallel by disk & controller

consider striping (raid 1+0) across 7 devices or so.

good luck,

steve

"Vijaya Chander V.S" <srinivasa_v@infosys.com>
Sent by: root@fatcity.com

01/30/2003 03:58 AM
Please respond to ORACLE-L

To: Multiple recipients of list ORACLE-L <ORACLE-L@fatcity.com>
cc:
Subject: data migration strategies

Hi,

Thank you for your responses.
What kind of strategies should be followed while migrating data from Sybase to Oracle
and non-propriatory databases to Oracle so that the down time is as low as possible.
The Sybase database size is 2TB and other DB's total make up to 400GB
any pointers will be helpful to us...

regards,
Vijaya Chander V.S
--
Please see the official ORACLE-L FAQ: http://www.orafaq.net
--
Author: Vijaya Chander V.S
INET: srinivasa_v@infosys.com

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--=_alternative 004C6AC185256CBE_=-- -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Stephen Evans INET: evans036@mc.duke.edu 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@fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).