I had the opportunity to work with a very good sys
admin. We used raw on an EMC Sym and managed it all
with Veritas. We both decided to keep our datafiles
no bigger than 1GB regardless of TS size and at least
4 datafiles per TS. We used 36GB drives in our Sym,
each divided into 9GB LUNs. Our rational was that we
could isolate IO hotspots and move 1GB chunks around
quickly and that we'd have a much better chance of
finding a LUN available with at least 1GB free.
Ofcourse, our DB was much smaller (300GB vs 1TB) but I
believe our stratgey worked quite well.
I guess you should go with whatever works best for you
in your environment.
mkb
- Gene Sais <Gsais_at_co.palm-beach.fl.us> wrote:
> I use 10gb datafiles for a 1tb db and also back up
> using Legato. Thinking about using Rman :)
>
> >>> lerobe_at_acxiom.co.uk 03/05/02 03:18AM >>>
> We use 4Gb datafiles here as the norm without any
> problems at all and those
> datafiles are all backed up with Legato. No problems
> whatsoever.
>
> Lee
>
>
> -----Original Message-----
> Sent: 05 March 2002 03:33
> To: Multiple recipients of list ORACLE-L
>
>
> That being said is there anything wrong with having
> one 4G data
> file for a tablespace. I personally cannot think of
> any. There
> were the days when 2G was the limit but that sure
> isn't the case
> anymore.
>
> The only thing I can think of is for backups.
> However, I am always
> going to backup on at least the tablespace level so
> if I have
> one file or multiple files I still need to get them
> all. I don't
> know if RMAN has some special feature that turns out
> it makes sense
> to backup just one data file of a tablespace that
> has multiple
> data files but I sure can't think of any good
> reason.
>
> I just randomly picked RBS but I am seeing the same
> case on
> data tablespaces as well.
>
> -----Original Message-----
> Carmichael
> Sent: Monday, March 04, 2002 6:29 PM
> To: Multiple recipients of list ORACLE-L
>
>
> no reason. I can see creating multiple files under
> those conditions
> only because you want to keep files to a specific
> size.
>
> Now, I did once find that the rollback datafiles
> were a bottleneck on a
> system I had. So we built TWO rollback tablespaces,
> with datafiles on
> different mount points etc and the rollback segments
> divided between
> the two tablespaces.
>
> cleared up that bottleneck like a dream
>
>
> other than that though.. why?
>
>
> --- Kimberly Smith <ksmith2_at_myfirstlink.net> wrote:
> > OK, I know we had the debate already but lets have
> another go at it.
> >
> > Say you got a tablespace, lets call it RBS and its
> for rollbacks.
> > Now, for what reason would you create a 500M file
> and 4 50M files
> > for this puppy as opposed to just one file. I
> just cannot see the
> > reasoning
> > for this at all. None. Natta. Zilch.
> >
> > So educate me please if someone out there knows a
> legit reason they
> > would do this.
> >
> > Lets assume for the sake of argument that disk
> size and mount point
> > size is not a limitation. Space available to me
> on any one mount
> > point
> > is unlimited.
> >
> > ___________________________
> > Kimberly Smith
> > Portland, OR
> > ksmith2_at_myfirstlink.net
> >
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Received on Tue Mar 05 2002 - 08:28:31 CST
