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" <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED] 01/30/2003 03:58 AM
|
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]> 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
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