If you have a Raid 0 of 6 drives and set a strip size to be 16K, then the
girth (or commonly referred to as stripe width) is 16k x 6 or 96K, if you
write less than 96K you will only use some of the drives. With a write-back
caching controller it can hold writes to speed transactions but also to be
more efficient with the writes.
"Do not criticize someone until you walked a mile in their shoes, that way
when you criticize them, you are a mile a way and have their shoes."
Christopher R. Spence
Oracle DBA
Phone: (978) 322-5744
Fax: (707) 885-2275
Fuelspot
73 Princeton Street
North, Chelmsford 01863
-----Original Message-----
Sent: Wednesday, October 24, 2001 1:17 PM
To: Multiple recipients of list ORACLE-L
"use the girth" -- I'd love to pretend that I knew what this means but
someone might call me on it. What does it mean? Each drive is 36G.
Christopher
Spence To: Multiple recipients of list
ORACLE-L
<cspence <[EMAIL PROTECTED]>
@FuelSpot.com cc:
> Subject: RE: RAID for a
development box
Sent by: root
10/24/2001
12:25 PM
Please
respond to
ORACLE-L
On my NT Quad Development box I have 9x2 Raid 1 for OS/Oracle Files.
Then Raid 0+1 for the 6 drives for data. It isn't perfect, but works good.
If you do raid 0 with 6 drives, make sure you look into a good stripe size
so you actually use the girth. Otherwise 0+1,1+0 may be a better option.
"Do not criticize someone until you walked a mile in their shoes, that way
when you criticize them, you are a mile a way and have their shoes."
Christopher R. Spence
Oracle DBA
Phone: (978) 322-5744
Fax: (707) 885-2275
Fuelspot
73 Princeton Street
North, Chelmsford 01863
-----Original Message-----
Sent: Wednesday, October 24, 2001 10:30 AM
To: Multiple recipients of list ORACLE-L
We're setting up a development box that will have a number of instances on
it. We won't need any backup, since we can easily re-create the databases
from testing instances.
I'm planning on implementing the disk storage as RAID0 - a single logical
volume stripped across all the drives (6), with the stripe size set to the
OS (Win2K) block size. We will only have 4 or 5 developers on the box at
any one time and I want to maximize IO utilization.
Any "heads up" here?
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