RE: Data Warehousing - RAID5 or RAID0-1

RAID 1 requires twice as many platters as no RAID at all, but what is = it's
ratio vs. RAID 5?

-----Original Message-----
From: CHUCK_HAMILTON_at_qvc.com [mailto:CHUCK_HAMILTON_at_qvc.com] Sent: Friday, May 05, 2000 11:40 AM
To: Multiple recipients of list ORACLE-L Subject: Re: Data Warehousing - RAID5 or RAID0-1

DWs are typically high read, low write applications. RAID-5 should be = fine
for all but TEMP tablespace, RBS tablespace, redo logs, and archived = logs.
RAID 0+1 is also good but requires twice as much disk.

--
Chuck Hamilton
QVC Inc.
Enterprise Technical Services
Oracle DBA




=20


                    "Surjit

                    Sharma"               To:     Multiple recipients =
of
list ORACLE-L <ORACLE-L_at_fatcity.com>      =20
                    <surjits_at_ozema        cc:     (bcc: CHUCK =
HAMILTON/QVC)

                    il.com.au>            Subject:     Data Warehousing =
-
RAID5 or RAID0-1                         =20
                    Ext: NA

                    Sent by:

                    root_at_fatcity.c

                    om



=20




=20


                    05/05/00 09:14

                    AM

                    Please respond

                    to ORACLE-L



=20




=20







Hi

I need your thoughts on RAID0-1 vs RAID5  configuration on very large =
data
warehousing project. The expected data is going  to be about 1 Tera =
byte,
10 Giga byte Memory, Sun box E6500 , Oracle  8.1.5.

I am told that for data warehousing RAID01  (mirroring and striping) is =
the
good balance between=A0 RAID5 and no RAID at  all.=A0 Does anyone has =
any
experience on this? I will be delighted to hear  your thoughts.

My main consideration is to be able to load the  data in the given =
window
(overnight) and good response time for the  queries.

Thanks in advance.

Surjit




--=20
Author:=20
  INET: CHUCK_HAMILTON_at_qvc.com

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