Re: SAME config

I understand that the generally accepted use of the term "stripe width" refers to the size of an individual disk's contribution to the stripe. I also know that the term has also been used (much less frequently) to refer to the entire stripe. Since 1 MB is uncommonly large for the first (generally accepted) definition, I wanted to make sure of the precise meaning of the term contemplated by the S.A.M.E. paper. I think that would be a question for Oracle cogniscenti.

Currently, I am under the impression that the term "1 MB strip size" refers to an individual disk, within a stripe.

I certainly agree that it is more appropriate to ask Sun about configuration details of the Sun StorEdge 3310 RAID, and will do so.

Thank you.

DG

"Hans Forbrich" <forbrich_at_yahoo.net> wrote in message news:vU2Zc.37233$A8.25487_at_edtnps89...
> David E. Grove wrote:
>
> > I certainly thank you for your explanation, Hans. I appreciate the
point
> > that it isn't really necessary to agonize over placement of data,
indexes,
> > etc., and that we can obtain most of the benefit of doing that with a
> > simple "one-size-fits-all" scheme which is known to be suboptimal, yet
is
> > "close" to optimal, and very robust.
> >
> > I didn't ask my question clearly. I was mainly wondering about the
> > meaning
> > of "stripe width" in the SAME paper. My first impression is that it
means
> > the size of the stripe on each individual disk. (Thus, with 6 disks,
the
> > total stripe size would be 6 MB). It just seemed a little large. But,
> > then that is consistent with causing the seek time to be small with
> > respect to the transfer time.
> >
> > Thank you, again.
> >
>
> Actually, I found your question quite straight forward. It was also an
> opportunity to expand of that single point as it does come up from time to
> time.
>
> Stripe Width:
>
> FRom http://www.webopedia.com/TERM/D/disk_striping.html
>
> "A technique for spreading data over multiple disk drives. Disk striping
can
> speed up operations that retrieve data from disk storage. The computer
> system breaks a body of data into units and spreads these units across the
> available disks. Systems that implement disk striping generally allow the
> user to select the data unit size or stripe width."
>
>
> I do agree with Jack's response: this question is better directed to
> SUN/SMCC.
>
> Or ask google to 'define RAID stripe width' and look at items like 'Volume
> Manager With Sun StorEdge ES-310'. Or
> http://archive.nlm.nih.gov/pubs/bangbuck/bangbuck.php
>
> /Hans
Received on Tue Aug 31 2004 - 14:11:42 CDT