Re: Any Data Warehouse DBA's out there?

I'm a warehouse newbie, more of a shed really. But if you are serious about a big warehouse, go to version 8 and use _real_ data partitioning; V7 partition views are reputed to be a bit of a pain.

In article <mjrELo19G.CFL_at_netcom.com>, Mark Rosenbaum <mjr_at_netcom.com> writes
>In article <34A00991.F85876DB_at_mindspring.com>,
>Stephen <atldude_at_mindspring.com> wrote:
>>Hi!
>>
>>I'm looking to strike up a conversation with some people who are using
>>Oracle 7.3 as a data warehouse database. We're running Oracle 7.3.2.3
>>on a Sun Solaris system (E6000 running Solaris 2.5.1). I'd really like
>>to share experiences with things like SGA sizes and performance using
>>RAID arrays. We're using Sun's series 200 RAID Arrays and the data
>>files are on striped RAID-5 volumes. We mostly reading so the write
>>performance hit on RAID-5 doesn't bother us, and we've got the Oracle
>>files (non data) on Non RAID drives.
>>
>>I'd just like to discuss how others are experiencing the use of Oracle
>>7.3 as a data warehouse engine. We might be able to share some
>>insights.
>
>Hi Stephen,
>
>I'm not currently using Oracle but I did on my last assignment so there
>are a few thing that I remember. To respond to a few of the issues
>that you raised.
>
>SGA size depends on number of users and size of db. On a similar note
>you might try raising the number of blocks for read ahead.
>
>RAID 5 (depending on implementation) has good read and good large
>block write performance and poor small block write performance.
>If your update window is large enough to support Raid 5 then no
>problem otherwise you might want to think about Raid 0+1 for
>the current partitions. Which brings me to my next point.
>
>Depending on size you will want to partition the data (typically
>by date). Partitioned views helps here.
>
>You may also want to explore bit mapped indexes but make sure
>they work with partitioned views.
>
>I hope this helps get things started
>
>mjr
 

-- 
Tom Cooke