RE: 10g upgrade survey
- From: JApplewhite@xxxxxxxxxxxxx
- To: oracle-l@xxxxxxxxxxxxx
- Date: Fri, 23 Mar 2007 09:47:20 -0500
Yes, "Divide and Conquer" when doing Exports/Imports is a very good
strategy. Our Student Information System has over 127,000 tables (yes,
that's One Hundred Twenty-Seven Thousand), representing seven SchoolYears'
of data. We use SQL statements to dynamically create an Export *.par file
for each SchoolYear and export them in parallel. It's only about 30G of
data, but parallelizing the process has greatly speeded up the refresh of
our Dev and other databases with selected SchoolYears'.
As Andrew points out, having LOBs or not impacts the Export times. I
would add that the degree of constraints and/or indexing greatly impacts
the Import times.
BTW, we've found that the Tables= list in the Export *.par fiile can be
somewhere just short of 32,000 before Export barfs.
Our environment is predominantly Oracle9i on Linux and HPUX.
Jack C. Applewhite - Database Administrator
Austin (Texas) Independent School District
512.414.9715 (wk) / 512.935.5929 (pager)
Same-Day Stump Grinding! Senior Discounts!
-- Mike's Tree Service
"Kerber, Andrew W." <Andrew.Kerber@xxxxxxx>
Sent by: oracle-l-bounce@xxxxxxxxxxxxx
03/23/2007 08:05 AM
Please respond to
Andrew.Kerber@xxxxxxx
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Subject
RE: 10g upgrade survey
Single table or multiple tables? When we had to do 300G or so, we
exported groups of tables at a time using 4 separate streams, and did
the same on import. Took about 8 hours total for the whole thing. Of
course, we didn't have many clobs, they can make things take a lot
longer.
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Ujang Jaenudin
Sent: Friday, March 23, 2007 6:00 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: Re: 10g upgrade survey
hi,
could anyone have experience export/import about 250GB data? on SAN
how long it takes. or is it better by dbua & cross platform
transportable tablespace?
I will migrate oracle from win2k 64 bit oracle 9i non RAC to Linux 64
bit Oracle 10g RAC.
thanks for the reply
--
regards
ujang
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