RE: To use SAME or NOT for High End Storage Setup ?

From: Kevin Closson <kevinc_at_polyserve.com>
Date: Wed, 10 May 2006 11:13:32 -0700
Message-ID: <5D2570CAFC98974F9B6A759D1C74BAD0E5A398@ex2.ms.polyserve.com>

hmmm...is that much different than Shark? :-)  

Anyway, while I don't fully understand the "2nd level of striping" question,
I can say from a lot of high end DS4X00 array testing that it works fine. I routinely take sets of RAID1+0 LUNS and create a volume in the volume manager as RAID1 (striped). Otherwise you will have a bunch "chunks" (47 of them) and you'll have to play some balance games to load up the spindles evenly. If you put a filesystem on a striped volume of RAID1+0 LUNS you are indeed SAME. Then you create tablespaces with datafiles in the filesystem, use direct I/O, async I/O and you have the optimal setup using decades old proven deployment methodology.  

Or you could use ASM if you like RAW partitions.  

PS. The DS4X00 arrays top their stripe width out at 256KB. I generally go with that.  

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        From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of VIVEK_SHARMA

	Sent: Wednesday, May 10, 2006 10:46 AM
	To: Oracle-L
	Subject: To use SAME or NOT for High End Storage Setup ? 
	
	

	Folks

	 

	For a Big Benchmark should SAME (Stripe Across ALL Disks) setup

of a "DS8300" storage box be considered or NOT?          

        Storage has 47 LUNs

        Each LUN has 8 Disks (Hardware RAID 1+0)          

        Qs. Should the 2nd Level of Striping be Done across ALL of the 47 LUNs (SAME) or some Optimal Num of LUNs?

        Database will be spread out across these underlying 47 LUNs.          

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Received on Wed May 10 2006 - 13:13:32 CDT