Re: Storage basics for Oracle DBA

From: DA Morgan <damorgan_at_x.washington.edu>
Date: Tue, 29 Mar 2005 11:33:15 -0800
Message-ID: <1112124588.320901@yasure>

Shabble wrote:

>>>>On the subject of storage it is time to call something a myth: That you
>>>>should not use RAID 5 for applications that perform heavy writes.
>>>>
>>>>That statement may well be true for most storage arrays but I am now
>>>>aware of one on which RAID 5 writes faster than RAID 1+0.
>>>>
>>>>So the answer, from now on, is "it depends on your hardware vendor."
>>>>--
>>>>Daniel A. Morgan
>>>>University of Washington
>>>>damorgan_at_x.washington.edu
>>>>(replace 'x' with 'u' to respond)
>>>>
>>>
>>>
>>>I concur, and I'm glad (and kinda relieved) to hear *you* say it. Our

> 
> System
> 


>>>Architects demonstrated this on one of our large systems.

>>>We have to keep an eye on technology advances.

>>>
>>>Shabble.
>>
>>Thanks. Please send me, off-line if you choose, information on your
>>storage system. I am trying to compile a list.
>>
>>For those interested ... the system I tested is Apple's new XServe RAID.
>>It has two XOR engines, rather than the usual one, so that even pulling
>>a drive and forcing a rebuild causes almost no performance degredation.

> 
> 
> Unfortunately I do not have access to that project any more. I do recall it
> was an implementation of a Hitachi SAN which was tested.
> If I find out more I will copy you.
> 
> Shabble.

Thanks but I'm not surprised. Certainly a best of breed product. Unfortunately at a very expensive price.

Thanks.

-- 
Daniel A. Morgan
University of Washington
damorgan_at_x.washington.edu
(replace 'x' with 'u' to respond)

Received on Tue Mar 29 2005 - 13:33:15 CST