I personally use bigfiles in ASM. I dont even consider the time to
restore a hugefile, because I do not forsee the need to restore only a
chunk of a tablespace. If I am restoring the entire tablespace, it
doesn't matter how many files I have.
If I have corrupted blocks, I would use RMAN's blockrecover command.
--
Christo Kutrovsky
Senior Database/System Administrator
The Pythian Group - www.pythian.com
I blog at http://www.pythian.com/blogs/
On 5/2/07, Robert Freeman <robertgfreeman_at_yahoo.com> wrote:
>
> Wow... that makes for a long dba_data_files query!! My personal thought on
> this is for BIG databases, I like to time how long it takes to restore a
> given datafile size. If I need to recover a given datafile, how long do I
> want that to take? My general rule is no more than 10-15 minutes (depending
> on any SLA's of course!). So if it takes 15 minutes to restore 20GB, that
> would be my datafile size (assuming the OS can handle a datafile of that
> size and so on).
>
> I much prefer fewer, larger datafiles to more, smaller ones. Much easier to
> manage among other things.
>
> RF
>
>
> Robert G. Freeman
> Oracle Consultant/DBA/Author
> Principle Engineer/Team Manager
> The Church of Jesus Christ of Latter-Day Saints
> Father of Five, Husband of One,
> Author of various geeky computer titles
> from Osborne/McGraw Hill (Oracle Press)
>
> -----Original Message-----
> From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org]On
> Behalf Of daniel.hubler_at_aurora.org
> Sent: Wednesday, May 02, 2007 9:50 AM
> To: oracle-l_at_freelists.org
> Subject: Datafile sizes
>
>
> Looking for comments & experiences regarding sizes of datafiles.
>
> We have a large (6+ TB) OLTP database, which currently has 2300+ datafiles.
> A while ago, we stopped adding datafiles and were exclusively extending
> them.
> But we are wondering how far we can/should go, with the size of individual
> data files.
> Currently about 30% of the datafiles are at 8 gig.
>
> BTW - this particular application resides on VMS.
>
>
> Any ideas/thoughts/comments would be appreciated.
>
> Thanks.
>
>
> Dan Hubler
> Database Administrator
> Aurora Healthcare
> daniel.hubler_at_aurora.org
--
Christo Kutrovsky
Senior Database/System Administrator
The Pythian Group - www.pythian.com
I blog at http://www.pythian.com/blogs/
--
http://www.freelists.org/webpage/oracle-l
Received on Wed May 02 2007 - 14:33:27 CDT
