Re: SAME methodology questions...

Burton Peltier wrote:
> I have no experience, but I am also curious about how others are doing this
> after recently reading about this because there are more people (in our
> company) recommending SAME.
>
> Sorry if I am creating a discussion you didn't want, but I would like to
> also hear from those who use SAME to explain a couple of things about their
> setup.
>
> SAME is suppose to "keep it simple" . It seems it does IF you configure the
> disks correctly, but the 1 thing I would still worry about is not
> multiplexing REDO to 2 different sets of disk spindles. Does anyone using
> SAME have a good explaination why this is not potentially a problem.
>
> Also, there are a couple of little details like the 1M stripe size and
> "using the outer edges of the disk platter for frequently accessed files" ,
> that are not so simple. Our SysAdmin didn't have any idea how to do the
> outer edges setup on Sun A1000 arrays. Does SAME require specific/expensive
> hardware?
>

SAME does "keep it simple", but at what price?

WRT the 1MB stripe size...
I state categorically that I've NEVER seen Oracle ask for or get anything close to 1MB in a single I/O request/operation.

What is the product of the Oracle block size times Oracle multiblock read count?
Isn't this value the largest I/O request by Oracle?

What problem are you really trying to solve? What are the metrics & their values which will confirm that you've really achieved the desired goal(s)? Received on Sun Jun 08 2003 - 09:26:39 CDT