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Re: Is Raid 5 really that bad for Oracle?

From: <Harry_Boswell_at_deq.state.ms.us>
Date: Tue, 17 Aug 2004 09:53:14 -0500
Message-ID: <mt64i0tmrgmhdhhsfntommqvpp3kfpm2kg@4ax.com>


On Fri, 13 Aug 2004 18:35:13 -0700, Daniel Morgan <damorgan_at_x.washington.edu> wrote:

>Harry_Boswell_at_deq.state.ms.us wrote:
>
>> On Wed, 04 Aug 2004 21:13:07 +0800, Connor McDonald
>> <connor_mcdonald_at_yahoo.com> wrote:
>>
>>
>>>Daniel Morgan wrote:
>>>
>>>>Noons wrote:
>>>>
>>>>
>>>>>Connor McDonald apparently said,on my timestamp of 3/08/2004 10:15 PM:
>>>>>
>>>>>
>>>>>>Result: - They've halved the number of spindles
>>>>>>- They've not enough disk space
>>>>>>but hey...at least we've got a SAN
>>>>>
>>>>>
>>>>>Wait until the IT damager decides to go to a NAS
>>>>>because it's "better value"...
>>>>
>>>>The performance difference between SAN and NAS used to be of critical
>>>>importance. I am not seeing enough difference these days to justify
>>>>the huge difference in price. Is anyone having a different experience?
>>>>
>>>>--
>>>>Daniel A. Morgan
>>>>University of Washington
>>>>damorgan_at_x.washington.edu
>>>>(replace 'x' with 'u' to respond)
>>>
>>>The next version of NFS (is it 4?) is touted to resolve a lot of the
>>>issues with NAS. I know of a few clients (albeit hardly massive
>>>database activity) that are happily running oracle on netapp
>>>
>>
>>
>> OK..... having read through (most of) these replies, I'm wondering
>> what I should make of them. I'm currently running RAID 5 - 2 A1000s -
>> and there's no money to go buy new disk systems. So, do I take from
>> this that I should reconfigure to RAID 0, or RAID 1? Should I put my
>> redo logs on non-RAID drives? Should I tell my network guys, who are
>> wanting to marry their Wintel servers and my Solaris servers "over my
>> dead body"?
>>
>> Harry
>
>If you don't have an I/O problem leave it alone and find something
>else to do like read the alert logs. If you have an I/O problem is it
>related to reads or writes? If reads leave it alone. If writes than
>it is time to convince management to spend money or more disk and
>reconfigure to 0+1. If they won't spend the money ... then the problem
>is theirs so leave it alone.

It seems to be read-heavy, so I'll just keep my politically-incorrect RAID-5 setup for now. Thanks!

Harry Received on Tue Aug 17 2004 - 09:53:14 CDT

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