Re: best case scenarios for export/import

First of all you have to have an estimate on how long the import should take. Oracle rule-of-thumb formula for that is

                                                                                                 
                                                                 import elapsed time = export    
                                                                 elapsed time X 4                
                                                                                                 
                                                                                                 

At least you have a targeted time to shoot for then try to improve if necessary.

Rick

                                                                                                                    
                    "Magaliff, Bill"                                                                                
                    <Bill.Magaliff_at_len       To:     Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>    
                    dware.com>               cc:                                                                    
                    Sent by:                 Subject:     best case scenarios for export/import                     
                    root_at_fatcity.com                                                                                
                                                                                                                    
                                                                                                                    
                    12/20/2002 09:04                                                                                
                    AM                                                                                              
                    Please respond to                                                                               
                    ORACLE-L                                                                                        
                                                                                                                    
                                                                                                                    

Good day, all:

I'm looking for real-life best-case scenarios for running import/export . . . I've been playing with this for quite some time and would like to know how
"fast" I can really expect this to go, particularly for the import.

I'd be interested to hear others' experiences - how fast have you been able to import data? what parameters have you used? etc. . . . it's both for informational purposes and as a sanity check.

For example: I'm now trying to import a dump file of appx 6.5 Gb - breaks down into 12G data and 4G indexes.
using the following params on the first import, to just get the data (I then
rerun with the indexfile param to get the indexes): recordlength=65535
buffer=15000000 (15M)
commit=y
indexes=n
constraints=n
grants=n

This will import in appx 36 hours using a single 3 Gb rollback segment

What kind of experiences have you had?

Thanks
bill

--
Please see the official ORACLE-L FAQ: http://www.orafaq.net
--
Author: Magaliff, Bill
  INET: Bill.Magaliff_at_lendware.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_at_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).





-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: 
  INET: Rick_Cale_at_teamhealth.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_at_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).