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RE: Dell-Oracle-Linux: Anyone else run this...because its not working for us!

From: Marquez, Chris <cmarquez_at_collegeboard.org>
Date: Fri, 9 Dec 2005 13:26:24 -0500
Message-ID: <B30C2483766F9342B6AEF108833CC84E05BD60C0@ecogenemld50.Org.Collegeboard.local>

Allen,

>> Array Subsystem:
>> o PERC 3/DC, Firmware 196T

What is your storage array? We have a PV 220s...although I believe the additional PERC*/DC (PCI?) cards we added to the servers are the real culprit. If a PV220 do you run is "split" or "cluster" mode?

>>Maybe there is just a problem with Linux
>>or RAC running on this hardware?

I would like to believe this and I know for sure that our RAC config using OCFS seemed much "harder" on the disks.

However;

1.)
I have 2 db system almost identical hardware (PERC4/DC & OCFS vs. PERC3/DC & EXT3) one RAC and the other not and we see the SAME ERRORS.

2.)
Again, when this same hardware was on SuSE7-Oracle8, no RAID, PV220 in "split mode" we did not have issues. We run RH3-Oracle9i, RAID5/1, PV220 in "cluster mode" now...so more than just the OS changed with this config.

3.)
One of my BKP servers RH3-Oracle9i is using the PERC3/DC cards to the PV220s with no RAID for about two weeks not without issue...then again this db is a standby and not hit nearly as hard

My point being if it is Linux at fault why would the problem disappear when we run no RAID config.

If I have not said it before what we get is MegaRaid module errors at the OS level but we believe the module is cooking on bad hardware (in RAID use).

???

I don't know, abut what Dell concluded says a lot to me...that is why I shared it.

Chris Marquez
Oracle DBA

-----Original Message-----
From: oracle-l-bounce_at_freelists.org on behalf of Allen, Brandon Sent: Fri 12/9/2005 12:10 PM
To: tomday2_at_gmail.com; oracle-l_at_freelists.org Subject: RE: Dell-Oracle-Linux: Anyone else run this...because its not working for us!  

I've been running Oracle on the following config with no problems for a couple years, averaging about 500 IOPS (350 reads/s + 40 writes/sec times 4 due to the RAID 5 parity = 350+(40*4)=510 IOPS). The write performance is terrible due to RAID5, but other than that it seems to run great. Maybe there is just a problem with Linux or RAC running on this hardware?

	Dell 6650
	Win2K3 Enterprise Edition
	4 Xeon 2Ghz CPUs w/ Hyper-Threading
	3.5 GB RAM
	Array Subsystem:
	o	PERC 3/DC, Firmware 196T
	o	8 x 73gB drives (10k RPM Ultra320 SCSI)
		o	Virtual Disk 0 - 2 disks, RAID1 - 68.24GB capacity
		o	Virtual Disk 1 - 2 disks, RAID1 - 68.24GB capacity
		o	Virtual Disk 2 - 4 disks, RAID5 - 204.73GB capacity
	Oracle 9.2.0.6 Enterprise Edition





-----Original Message-----
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org]On Behalf Of Thomas Day Sent: Friday, December 09, 2005 9:42 AM
To: oracle-l_at_freelists.org
Subject: Re: Dell-Oracle-Linux: Anyone else run this...because its not working for us!

Dell replaced our controller. The Dell technician opined as how the PERC controller probably wasn't up to the load imposed by Oracle. This was in a RAID 0 configuration.

I guess that's what you get when you go with the lowest bidder.

Looking forward to honing my recovery techniques to a fine edge --- again.

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Received on Fri Dec 09 2005 - 12:26:38 CST

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