My understanding was that EMC does not stripe its
disks. they just have mirror and RAID S.
- Sr DBA <sr_dba_at_hotmail.com> wrote:
> Why would you software stripe it if you are using
> EMC?
> ----- Original Message -----
> From: "Johnson Poovathummoottil" <joni_65_at_yahoo.com>
> To: "LazyDBA.com Discussion" <oracledba_at_lazydba.com>
> Sent: Wednesday, April 24, 2002 8:57 AM
> Subject: Number of File systems to use.
>
>
> > All,
> >
> > Although this has been discussed many times. My
> boss
> > wants other opinions on this.
> >
> > We EMC storage whcih uses 9 gig disks.
> > We also use veritas volume manager.
> >
> > We plan to upgrade our SUN ultra e6500 to sun fire
> 15K
> > machine. During to move we want to do a little
> reorg.
> > This machine will have 6 partitions, 3 for the
> OLTP
> > databases and 3 for the warehouse.
> >
> > The warehouse currently uses 20 file systems 25 GB
> > each(3 disks raid S) for data and index. We have
> > agreed on making the file systems to use 4 disks
> and
> > stripe it with 256 KB stripe size. There are two
> > opinions regarding the number of file systems.
> >
> > 1: 50 file systems of 15 GB each. In this case the
> 4
> > disks are not fully used. What is ramainig after
> the
> > 15 GB can be alloted to other file systems other
> than
> > the ones used by the database. Advantage IO spread
> > over disks.
> >
> > 2: 20 file systems of 34 GB each. All four disks
> are
> > fully used. IO over 80 disks.
> >
> > Question.:
> > 1:Since we are using EMC do we need to pay so much
> > attention to spreading IO.
> > 2: Any problems/advantages in having too many file
> > systems.
> >
> > Please give all your opinions.
> >
> >
> >
> > __________________________________________________
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> more
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> >
> > --------
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http://games.yahoo.com/
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Author: Johnson Poovathummoottil
INET: joni_65_at_yahoo.com
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Received on Wed Apr 24 2002 - 13:28:35 CDT
